Extend Dill String Longevity…
Optimize Connection Performance…
Avoid Fishing for Broken Parts…
Eliminate Standoff, Lead, and Taper Errors…
Understanding and anticipating problems in sub-surface and blast hole mining are key in reducing maintenance and operational costs. An important factor in determining the reliability of the connections in the drill string is proper thread inspection.
Gagemaker’s JSS® Drill Pipe Thread Inspection System will help identify improperly manufactured threads and prevent costly connection failure before the mining drill pipe goes underground. The JSS®system is a comprehensive inspection method developed by Gagemaker to accurately gauge the quality of a connection through inspecting the critical attributes of a thread.
Proper inspection and preventative maintenance on a routine basis are the best measures to preventing connections failure. With the JSS® method you can ensure stronger joint connections and reduce expensive rework charges on pipe by inspecting some key thread elements.
JSS® Drill Pipe Inspection Process
JSS RSC Kit- Step 1:
Insert ID - Step 2:
Inspection Setup - Step 3:
Form - Step 4:
Pitch Diameter - Step 5:
Lead - Step 6:
Taper - Step 7:
Height
Inspect with the Revolutionary JSS® Kit and Make an Immediate Impact on Your Bottom Line
- Extend Drill String Longevity
- Optimize Connection Performance
- Avoid Fishing for Broken Parts
- Eliminate Standoff, Lead, and Taper Errors
- Prevent Stress Cracking and Galling from Improper Make-Up and Excessive Torque
- Reduce Non-Productive Rig Time Due to String Failure
- Ensure Exact Thread Cone Interference When Torque Shoulders Make-Up
- Detect Pitch Diameter Errors that Cause Oversized Boxes and Undersized Pins
Insert Identification
The first step in the quality process is to ensure the threading insert being used is correct for the job.
Use the JSS® Thread Insert Identifier Template to quickly verify that the correct threading insert has been selected as well as check the full topping profile of both internal and external inserts.
A quick mating of the insert to the template ensures the insert is correct for the job.
JSS insert identifiers have multiple notches on each template and are available for all API thread forms.
Gagemaker’s rotary shouldered connection thread insert identifier easily determines which threading insert the machinist is using.
When an optical comparator is unavailable, the insert identifier will show which thread form is on the insert.
| Threads Per Inch (TPI) | Taper Per Foot (TPF) | Thread Form | Model |
|---|---|---|---|
| 6 | 2” | V-0.032 | TI-RSC-60 |
| 4 | 2” | V-0.038R | TI-RSC-60 |
| 4 | 3” | V-0.038R | TI-RSC-60 |
| 5 | 3” | V-0.040 | TI-RSC-60 |
| 4 | 2” | V-0.050 | TI-RSC-60 |
| 6 | 3” | V-0.050 | TI-RSC-60 |
| 6 | 1.5” | V-0.055 | TI-RSC-60 |
| 4 | 2” | V-0.065 | TI-RSC-60 |
| 4 | 1.5” | V-0.076 | TI-RSC-60 |
| 4 | 3.373” | A-0.094 | TI-RSC-90 |
| 3.5 | 2” | 90-V-0.050 | TI-RSC-90 |
| 3.5 | 3” | 90-V-0.050 | TI-RSC-90 |
| 3 | 1.25” | 90-V-0.084 | TI-RSC-90 |
Inspection Setup
TDWIN Taper™ is the only software program dedicated to the manufacturing and inspection of downhole tubular connections. It has everything you need to machine, inspect, and document tubular connection threads. TDWIN Taper™ relies on API and industry standard tables and tolerances. TDWIN Taper™ displays connection drawings, inspection gage information, and setup and inspection reports. Simply, it is a must have for any machine shop.
TDWIN Taper™ is included in any full JSS® Inspection Package.
The program includes the following tapered connections:
Rotary Shouldered Connections
- Acme Regular
- Acme Streamline
- API Numbered Connections
- API Regular
- Double Streamline
- External Flush
- Full Hole
- Internal Flush
- H-90
- Open Hole
- PAC
- Slim Hole
- Slimline H-90
- Wide Open
- Xtra Hole
- NUE Tubing
- EUE Tubing
- Short Thread Casing
- Long Thread Casing
- Buttress Casing
- USS Improved Buttress Tubing
- Line Pipe
- Special Clearance Couplings
- SR13 Seal Ring Groove Couplings
System Requirements
- Microsoft Windows XP or newer
- USB 2.0 port
- Internet Connection for first use
- 1 MB RAM or more (recommended)
- Screen resolution of 1024 X 768 minimum
- .Net Framework 2.0 or later installed
Features
- Follows API Specification 7-2, Dec. 2008, for Rotary Shouldered Connections and API Specification 5B, Oct. 2008, for Tubing and Casing Connections
- Print product blueprints for manufacturing and inspection
- Print dimensional reports and inspection sheets
- Provides gage configurations, setting standards, and contact point information
1. Select Connection Type
2. Pick Size & View Drawing
3. Select Pipe End & Review Drawing
4. Choose Gage Type
5. Choose Thread Element
6. Review & Print Inspection Report
TDWIN Taper is available in single and multi-user models. Multi-user models may be adjusted to a customer specific number.
System Requirements
- Microsoft Windows XP or newer
- USB 2.0 port
- Internet Connection for first use
- 1 MB RAM or more (recommended)
- Screen resolution of 1024 X 768 minimum
- .Net Framework 2.0 or later installed
| User Licenses | Description | Model |
|---|---|---|
| 1 | Thread Disk for Tapered Threads Software, Single User license | TDWINTaper |
Thread Form Inspection
Thread form accuracy is important if two connectors are to make-up properly. Thread form is the profile or shape of each thread and it controls how the threads mate as they are made-up. It’s important to be sure thread form is consistent from the starting thread to the ending thread. Using a JSS® Thread Profile Gage ensures thread accuracy by providing a quick check to determine if the form is correct and uniform. Also, checking thread form will ensure the first imperfect thread is fully deburred.
Thread form is defined as its profile in an axial plane for a length of one pitch. Most importantly, verifying thread form is a recommended inspection for API connections.
Thread Form
Gagemaker manufactures precision tapered thread profile gages for the quick identification of product thread forms. Specify the connection which is to be inspected when ordering. Special profiles will be quoted upon request.
| Connection Type | Connection Size | TPI | TPF | Thread Form | Model |
|---|---|---|---|---|---|
| Hughes External Flush | 2⅜” - 2⅞” | 6 | 2” | V-0.032 | TP-6-2-32 |
| API Full Hole | 4” | 4 | 2” | V-0.038R | TP-4-2-38 |
| API Numbered Connections | #23 - #50 | 4 | 2” | V-0.038R | TP-4-2-38 |
| Double Streamline | 3½” - 5½” | 4 | 2” | V-0.038R | TP-4-2-38 |
| Hughes External Flush | 3½” - 4½” | 4 | 2” | V-0.038R | TP-4-2-38 |
| Hughes Xtra Hole | 2⅞” - 5” | 4 | 2” | V-0.038R | TP-4-2-38 |
| Hughes Slim Hole | 2⅜” - 4½” | 4 | 2” | V-0.038R | TP-4-2-38 |
| Internal Flush | 2⅜” - 6⅝” | 4 | 2” | V-0.038R | TP-4-2-38 |
| Wide Open | 2⅜" - 4½" | 4 | 2” | V-0.038R | TP-4-2-38 |
| API Numbered Connections | #56 - #84 | 4 | 3” | V-0.038R | TP-4-3-38 |
| API Full Hole | 2⅞”, 3½”, & 4½” | 5 | 3” | V-0.040 | TP-5-3-40 |
| API Regular | 2⅜” - 4½” | 5 | 3” | V-0.040 | TP-5-3-40 |
| API Regular | 6⅝” | 4 | 2” | V-0.050 | TP-4-2-50 |
| API Full Hole | 5½” & 6⅝” | 4 | 2” | V-0.050 | TP-4-2-50 |
| API Regular | 5½”, 7⅝”, & 8⅝” | 4 | 3” | V-0.050 | TP-4-3-50 |
| API Numbered Connections | #10, #12, #13, & #16 | 6 | 1.5” | V-0.055 | TP-6-1.5-55 |
| API Regular (Macaroni Tubing) | 1” - 1.5” | 6 | 1.5” | V-0.055 | TP-6-1.5-55 |
| P.A.C. Connections | 2⅜” - 3½” | 4 | 1.5” | V-0.076 | TP-4-1.5-76 |
| American Open Hole | 2⅜” - 4½” | 4 | 1.5” | V-0.076 | TP-4-1.5-76 |
| Hughes H-90 | 3½” - 6⅝” | 3.5 | 2” | 90-V-0.050 | TP-3.5-2-50 |
| Hughes H-90 | 7” - 8⅝” | 3.5 | 3” | 90-V-0.050 | TP-3.5-3-50 |
| Hughes Slimline H-90 | 2⅜” - 3½” | 3 | 1.25” | 90-V-0.084 | TP-3-1.25-84 |
External Thread Form Inspection
Internal Thread Form Inspection
Thread Pitch Diameter Inspection
Pitch diameter controls the strength of the thread assembly, and is the most critical measurement when inspecting threads. The JSS® Pitch Diameter Locating Templates and JSS® Pitch Diameter gages are a winning combination for pinpointing early signs of stress on both new and used pipe.
When the pitch diameter location templates are applied to the box or pin they can locate the proper thread where pitch diameter is to be measured. Using the internal or external pitch diameter gages allows control over the connection size during machining and ensures proper interference of thread cones when torqueing connections together.
The gages are adjustable within a size range and use interchangeable contact points to measure different pitch threads making very versatile. Before inspecting threads, the pitch diameter gage must be zeroed using the a setting standard.
Pitch Diameter Location
Pitch diameter location templates locate the point on the connection where the pitch diameter is measured. When applied properly to the connection, the template’s special layout mark indicates the proper thread to measure the pitch diameter.
A simple mark with a felt tip marking pen allows the operator or inspector to accurately position the gage and read a diameter. Please specify the threads per inch (TPI), taper per foot (TPF), and thread form when ordering.
Location Profiles- Pin
| Connection Type | Connection Size | TPI | TPF | Thread Form | Model |
|---|---|---|---|---|---|
| Hughes External Flush | 2⅜” - 2⅞” | 6 | 2” | V-0.032 | LPP-6-2-32 |
| API Numbered Connections | #23 - #50 | 4 | 2” | V-0.038R | LPP-4-2-38 |
| API Numbered Connections | #56 - #84 | 4 | 3” | V-0.038R | LPP-4-3-38 |
| API Full Hole | 4” | 4 | 2” | V-0.038R | LPP4-2-38 |
| Double Streamline | 3½” - 5½” | 4 | 2” | V-0.038R | LPP4-2-38 |
| Hughes External Flush | 3½” - 4½” | 4 | 2” | V-0.038R | LPP4-2-38 |
| Hughes Slim Hole | 2⅜” - 4½” | 4 | 2” | V-0.038R | LPP-4-2-38 |
| Hughes Xtra Hole | 2⅞” - 5” | 4 | 2” | V-0.038R | LPP-4-2-38 |
| Internal Flush | 2⅜" - 6⅝" | 4 | 2” | V-0.038R | LPP-4-2-38 |
| Wide Open | 2⅜" - 4½" | 4 | 2” | V-0.038R | LPP4-2-38 |
| API Full Hole | 2⅞”, 3½”, & 4½” | 5 | 3” | V-0.040 | LPP-5-3-40 |
| API Regular | 2⅜” - 4½” | 5 | 3” | V-0.040 | LPP-5-3-40 |
| API Full Hole | 5½” & 6⅝” | 4 | 2” | V-0.050 | LPP-4-2-50 |
| API Regular | 6⅝” | 4 | 2” | V-0.050 | LPP-4-2-50 |
| API Regular | 5½”, 7⅝”, & 8⅝” | 4 | 3” | V-0.050 | LPP-4-3-50 |
| API Numbered Connections | #10, #12, #13, & #16 | 6 | 1.5” | V-0.055 | LPP-6-1.5-55 |
| API Regular (Macaroni Tubing) | 1” - 1.5” | 6 | 1.5” | V-0.055 | LPP-6-1.5-55 |
| American Open Hole | 2⅜” - 4½” | 4 | 1.5” | V-0.076 | LPP-4-1.5-76 |
| P.A.C. Connections | 2⅜” - 3½” | 4 | 1.5” | V-0.076 | LPP-4-1.5-76 |
| Hughes Slimline H-90 | 2⅜” - 3½” | 3 | 1.25” | 90-V-0.084 | LPP-3-1.25-SLH9 |
| Hughes H-90 | 3½” - 6⅝” | 3.5 | 2” | 90-V-0.050 | LPP-3.5-2-H9 |
| Hughes H-90 | 7” - 8⅝” | 3.5 | 3” | 90-V-0.050 | LPP-3.5-3-H9 |
Location Profiles- Box
| Connection Type | Connection Size | TPI | TPF | Thread Form | Model |
|---|---|---|---|---|---|
| Hughes External Flush | 2⅜” - 2⅞” | 6 | 2” | V-0.032 | LPB-6-2-32 |
| API Numbered Connections | #23 - #50 | 4 | 2” | V-0.038R | LPB-4-2-38 |
| API Full Hole | 4” | 4 | 2” | V-0.038R | LPB4-2-38 |
| Double Streamline | 3½” - 5½” | 4 | 2” | V-0.038R | LPB4-2-38 |
| Hughes External Flush | 3½” - 4½” | 4 | 2” | V-0.038R | LPB4-2-38 |
| Hughes Slim Hole | 2⅜”- 4½” | 4 | 2” | V-0.038R | LPB-4-2-38 |
| Hughes Xtra Hole | 2⅞” - 5” | 4 | 2” | V-0.038R | LPB-4-2-38 |
| Internal Flush | 2⅜” - 6⅝” | 4 | 2” | V-0.038R | LPB-4-2-38 |
| Wide Open | 2⅜” - 4½” | 4 | 2” | V-0.038R | LPB-4-2-38 |
| API Numbered Connections | #56 - #84 | 4 | 3” | V-0.038R | LPB-4-3-38 |
| API Full Hole | 2⅞”, 3½”, & 4½” | 5 | 3” | V-0.040 | LPB-5-3-40 |
| API Regular | 2⅜” - 4½” | 5 | 3” | V-0.040 | LPB-5-3-40 |
| API Full Hole | 5½” & 6⅝” | 4 | 2” | V-0.050 | LPB-4-2-50 |
| API Regular | 6⅝” | 4 | 2” | V-0.050 | LPB-4-2-50 |
| API Regular | 5½”, 7⅝”, & 8⅝” | 4 | 3” | V-0.050 | LPB-4-3-50 |
| API Numbered Connections | #10, #12, #13, & #16 | 6 | 1.5” | V-0.055 | LPB-6-1.5-55 |
| API Regular (Macaroni Tubing) | 1” - 1.5” | 6 | 1.5” | V-0.055 | LPB-6-1.5-55 |
| P.A.C. Connections | 2⅜” - 3½” | 4 | 1.5” | V-0.076 | LPB-4-1.5-76 |
| American Open Hole | 2⅜” - 4½” | 4 | 1.5” | V-0.076 | LPB-4-1.5-76 |
| Hughes H-90 | 3½” - 6⅝” | 3.5 | 2” | 90-V-0.050 | LPB-3.5-2-H9 |
| Hughes H-90 | 7” - 8⅝” | 3.5 | 3” | 90-V-0.050 | LPB-3.5-3-H9 |
| Hughes Slimline H-90 | 2⅜” - 3½” | 3 | 1.25” | 90-V-0.084 | LPB-3-1.25-SLH9 |
External Pitch Diameter
The ball pitch diameter gages indicate the pitch diameter size of the product’s external thread. The gages are adjustable within a size range and use interchangeable contact points to measure different pitch threads. Gages ship with one set of contact points, please see the chart below to request proper points. Gages require setting with either a standard or a MIC TRAC™. TD Win Taper Software , MIC TRAC™ , contact points, and standards are sold separately.
| Range | Contact Points Included* | Description | Model |
|---|---|---|---|
| 0 – 6” (0 mm – 152.4 mm) | T144 | External Pitch Diameter for Tapered Threads | PD-8001-RSC |
| 6” – 12” (152.4 mm – 304.8 mm) | T144 | External Pitch Diameter for Tapered Threads | PD-8002-RSC |
Internal Pitch Diameter
Gagemaker’s internal pitch diameter gages measure variation in intrenal thread pitch diameters. Pitch diameter gages are shipped with one set of contact points, please see contact points tab to request proper points. Setting dimensions for the pitch diameter gages are provided by the TDWIN Taper™ software package. Gages require setting with either a standard or a MIC TRAC™. TDWin Taper Software , MIC TRAC™, and standards are sold separately.
| Range | Reach/Depth | Contact Points Included* | Description | Model |
|---|---|---|---|---|
| 1½” – 10” (38.1 mm – 254 mm) | 4” (101.6 mm) | T144 | Internal Pitch Diameter Gage for Tapered Threads | IT-5104-RSC |
JSS® Rotary Shouldered Connection Pitch Diameter Gages require setting. While you can use a MIC TRAC™ setting system, Gagemaker recommends these rod style setting standards to set your rotary shouldered connection pitch diameter gages.
Specify size or specific connection with ordering. Ex: RS-3.5-DS-B, RS-NC77-B, RSS-2.375-REG-B.
| Connection Name | Box/Pin | Threads Per Inch (TPI) | Taper Per Foot (TPF) | Thread Form | Description | Model |
|---|---|---|---|---|---|---|
| Hughes External Flush | Box | 6 | 2” | V-0.032 | Rod Standard for External Flush (2.375″ – 4.5″), Box | RS-__-EF-B |
| Hughes External Flush | Pin | 6 | 2” | V-0.032 | Rod Standard for External Flush (2.375″ – 4.5″), Box | RS-__-EF-P |
| API Full Hole | Box | 4 | 2” | V-0.038R | Rod Standard for Full Hole (2.875” – 6.625”), Box | RS-__-FH-B |
| API Full Hole | Pin | 4 | 2” | V-0.038R | Rod Standard for Full Hole (2.875” – 6.625”), Pin | RS-__-FH-P |
| API Numbered Connections #56 - #84 | Box | 4 | 3” | V-0.038R | Rod Standard for API Numbered Connections (#10 – #77), Box | RS-NC__-B |
| API Numbered Connections #56 - #84 | Pin | 4 | 3” | V-0.038R | Rod Standard for API Numbered Connections (#10 – #77), Pin | RS-NC__-B |
| API Numbered Connections #23 - #50 | Box | 4 | 2” | V-0.038R | Rod Standard for API Numbered Connections (#10 – #77), Box | RS-NC__-B |
| API Numbered Connections #23 - #50 | Pin | 4 | 2” | V-0.038R | Rod Standard for API Numbered Connections (#10 – #77), Pin | RS-NC__-B |
| Double Streamline | Pin | 4 | 2” | V-0.038R | Rod Standard for Double Streamline (3.5” – 5.5”), Pin | RS-__-DS-P |
| Double Streamline | Box | 4 | 2” | V-0.038R | Rod Standard for Double Streamline (3.5” – 5.5”), Box | RS-__-DS-B |
| Hughes External Flush | Box | 4 | 2” | V-0.038R | Rod Standard for External Flush (2.375″ – 4.5″), Box | RS-__-EF-B |
| Hughes External Flush | Pin | 4 | 2” | V-0.038R | Rod Standard for External Flush (2.375″ – 4.5″), Box | RS-__-EF-P |
| Hughes Slim Hole | Box | 4 | 2” | V-0.038R | Rod Standard for Hughes Slim Hole (2.375” – 4.5”), Box | RS-__-SH-B |
| Hughes Slim Hole | Pin | 4 | 2” | V-0.038R | Rod Standard for Hughes Slim Hole (2.375” – 4.5”), Pin | RS-__-SH-P |
| Hughes Xtra Hole | Box | 4 | 2” | V-0.038R | Rod Standard for Xtra Hole (2.875″ – 5.0”), Box | RS-__-XH-B |
| Hughes Xtra Hole | Pin | 4 | 2” | V-0.038R | Rod Standard for Xtra Hole (2.875” – 5.0”), Pin | RS-__-XH-P |
| Internal Flush | Box | 4 | 2” | V-0.038R | Rod Standard for Internal Flush (2.375” – 6.625”), Box | RS-__-IF-B |
| Internal Flush | Pin | 4 | 2” | V-0.038R | Rod Standard for Internal Flush (2.375” – 6.625”), Pin | RS-__-IF-P |
| Wide Open | Box | 4 | 2” | V-0.038R | Rod Standard for Wide Open (2.375” – 4.5”), Box | RS-__-WO-B |
| Wide Open | Pin | 4 | 2” | V-0.038R | Rod Standard for Wide Open (2.375” – 4.5”), Pin | RS-__-WO-P |
| API Full Hole | Box | 5 | 3” | V-0.040 | Rod Standard for Full Hole (2.875” – 6.625”), Box | RS-__-FH-B |
| API Full Hole | Pin | 5 | 3” | V-0.040 | Rod Standard for Full Hole (2.875” – 6.625”), Pin | RS-__-FH-B |
| API Full Hole | Box | 4 | 2” | V-0.050 | Rod Standard for Full Hole (2.875” – 6.625”), Box | RS-__-FH-B |
| API Full Hole | Pin | 4 | 2” | V-0.050 | Rod Standard for Full Hole (2.875” – 6.625”), Pin | RS-__-FH-P |
| API Regular | Box | 5 | 3” | V-0.040 | Rod Standard for Regular (1.0” – 8.625”), Box | RS-__-REG-B |
| API Regular | Pin | 5 | 3” | V-0.040 | Rod Standard for Regular (1.0” – 8.625”), Pin | RS-__-REG-P |
| API Regular | Pin | 4 | 3” | V-0.050 | Rod Standard for Regular (1.0” – 8.625”), Box | RS-__-REG-B |
| API Regular | Box | 4 | 3” | V-0.050 | Rod Standard for Regular (1.0” – 8.625”), Box | RS-__-REG-B |
| API Regular | Box | 4 | 2” | V-0.050 | Rod Standard for Regular (1.0” – 8.625”), Box | RS-__-REG-B |
| API Regular | Pin | 4 | 2” | V-0.050 | Rod Standard for Regular (1.0” – 8.625”), Pin | RS-__-REG-P |
| API Numbered Connections #10, #12, #13, & #16 | Pin | 6 | 1.5” | V-0.055 | Rod Standard for API Numbered Connections (#10 – #77), Pin | RS-NC__-P |
| API Numbered Connections #10, #12, #13, & #16 | Box | 6 | 1.5” | V-0.055 | Rod Standard for API Numbered Connections (#10 – #77), Box | RS-NC__-B |
| API Regular | Pin | 4 | 3” | V-0.055 | Rod Standard for Regular (1.0” – 8.625”), Pin | RS-__-REG-B |
| API Regular | Box | 4 | 3” | V-0.055 | Rod Standard for Regular (1.0” – 8.625”), Box | RS-__-REG-B |
| American Open Hole | Box | 4 | 1.5” | V-0.076 | Rod Standard for Open Hole (2.375” – 4.5”), Box | RS-___-OH-B |
| American Open Hole | Pin | 4 | 1.5” | V-0.076 | Rod Standard for Open Hole (2.375” – 4.5”), Pin | RS-___-OH-P |
| P.A.C. Connections | Box | 4 | 1.5” | V-0.076 | Rod Standard for PAC (2.375” – 3.5”), Box | RS-__-PAC-B |
| P.A.C. Connections | Pin | 4 | 1.5” | V-0.076 | Rod Standard for PAC (2.375” – 3.5”), Pin | RS-__-PAC-P |
| Hughes H-90 | Box | 3.5 | 2” | 90-V-0.050 | Rod Standard for Hughes H-90 (3.5” – 8.625” ), Box | RS-__-H9-B |
| Hughes H-90 | Pin | 3.5 | 2” | 90-V-0.050 | Rod Standard for Hughes H-90 (3.5” – 8.625” ), Pin | RS-__-H9-P |
| Hughes H-90 | Box | 3.5 | 3” | 90-V-0.050 | Rod Standard for Hughes H-90 (3.5” – 8.625” ), Box | RS-__-H9-B |
| Hughes H-90 | Pin | 3.5 | 3” | 90-V-0.050 | Rod Standard for Hughes H-90 (3.5” – 8.625” ), Pin | RS-__-H9-P |
| Hughes Slimline H-90 | Box | 3 | 1.25” | 90-V-0.084 | Rod Standard for Slimline H-90 (2.375” – 3.5” ), Box | RS-__-SLH9-B |
| Hughes Slimline H-90 | Pin | 3 | 1.25” | 90-V-0.084 | Rod Standard for Slimline H-90 (2.375” – 3.5” ), Pin | RS-__-SLH9-B |
API Contact Points for Pitch Diameter Gages
Gagemaker’s standard ball contact points are manufactured with carbide balls. All JSS® drill pipe inspection gages use threaded shank contact points. Threaded shanks are #4-48 UNF. Pitch diameter gages require two contact points. Gages ship with a default set of contact points that may be substituted. Additional points are sold individually and separately.
| Connection Type | TPI | Point Diameter | Model |
|---|---|---|---|
| API Rotary Shouldered Connections | 4 | .144" | T144 |
| API Rotary Shouldered Connections | 5 | .115" | T115 |
| API Rotary Shouldered Connections | 6 | .096" | T096 |
| Hughes H-90 | 3½ | .200" | T200 |
| Hughes Slimline H-90 | 3 | .235" | T235 |
External Pitch Diameter Location (LPP)
Internal Pitch Diameter Location (LPB)
External Pitch Diameter Inspection
Internal Pitch Diameter Inspection
Thread Lead Inspection
Thread lead has a direct impact on thread make-up because it affects the way the threads fit together. Lead is the distance from a point on a thread to a corresponding point on the next thread turn. Checking lead can tell you if the CNC lathe cutting the thread has a problem because the reading will vary from start to finish.
The JSS® Lead Gages use contact points that seat in the threads of a connection to inspect thread lead. Contact points are easily changed to allow measuring a variety of thread forms. The size of the contact points required for taking the measurements is determined by the pitch of the threads. The two models of the gage include the LG-6001 which measures external threads and the LG-6002 which measure internal threads.
Before inspecting threads, the lead gage must be preset to a predetermined dimension using the lead gage setting standard.
Features:
- Interchangeable contact points allow inspection on a variety of thread forms and sizes.
- Inspect mining drill pipe threads as well as mining casing threads
- Requires presetting using Gagemaker’s lead gage setting standards.
Lead Gages
Thread lead is the distance between threads, measured on a plane parallel to the centerline of the threaded part. Lead gages verify the thread lead is within tolerance for both internal and external threads. They inspect thread lead by using contact points that seat in the threads of a part. The pitch of the thread determines the diameter of the contact points required for taking measurements. API Specification 7-2 requires thread lead inspection.
The LG-6001 and the LG-6002 use a two-point system to inspect thread lead for straight and tapered threads. The LG-6002 inspects both external and internal threads, while the LG-6001 inspects external threads. The two point system allows for a sweeping action to obtain the measurement. Both gages are available with higher resolution indicators.
The LG-5003 uses the three-point system to inspect internal and external thread lead. Two fixed contact points at the rear of the gage and one movable contact point at the front of the gage provide complete stability when taking thread lead measurements. This unique design does not require sweeping to obtain measurements.
Contact points can be easily changed to allow the gage to be used on a variety of thread forms. Each gage comes with one set of contact points. Additional points are sold separately.
Before inspecting parts, the lead gage must be preset to a nominal predetermined dimension using a lead gage setting standard. Lead standards are available for both straight and tapered threads. Our setting standards are manufactured according to ANSI and API specifications, respectively.
| Model | Thread Length Range | Description | External/Internal | Number of Contact Points | Minimum Bore | Indicator Travel | Indicator Resolution | Contact Point Spacing | |
|---|---|---|---|---|---|---|---|---|---|
 | LG-6001 | ½” – 2” (12.7 mm – 50.8 mm) | 2-point external lead gage | External | 2 | 2.750” | .100" | .0005” | .200” |
 | LG-6002 | ½” – 4” (0 mm – 101.6 mm) | 2-point internal lead gage | Internal | 2 | 1.450” | .100" | .0005” | .200” |
 | LG-5003 | ½” – 4” (0 mm – 101.6 mm) | 3-point external/internal lead gage | External/Internal | 3 | 1.340” | .100" | .0005” | .500” |
Lead Gage Setting Standards
Lead gage standards are used to set the gage prior to the inspection. Gagemaker’s precision lead gage setting standards are manufactured in accordance with API Specification 7-2.
| Connection Type | Connection Size | Threads Per Inch (TPI) | Taper Per Foot (TPF) | Thread Form | Model |
|---|---|---|---|---|---|
| Hughes External Flush | 2⅜” - 2⅞” | 6 | 2” | V-0.032 | LS-1007 |
| API Numbered Connections | #23 - #50 | 4 | 2” | V-0.038R | LS-1007 |
| Double Streamline | 3½” - 5½” | 4 | 2” | V-0.038R | LS-1007 |
| API Full Hole | 4” | 4 | 2” | V-0.038R | LS-1007 |
| Hughes External Flush | 3½” - 4½” | 4 | 2” | V-0.038R | LS-1007 |
| Hughes Slim Hole | 2⅜” - 4½” | 4 | 2” | V-0.038R | LS-1007 |
| Hughes Xtra Hole | 2⅞” - 5” | 4 | 2” | V-0.038R | LS-1007 |
| Internal Flush | 2⅜” - 6⅝” | 4 | 2” | V-0.038R | LS-1007 |
| Wide Open | 2⅜” - 4½” | 4 | 2” | V-0.038R | LS-1007 |
| API Numbered Connections | #56 - #84 | 4 | 3” | V-0.038R | LS-1008 |
| API Regular | 2⅜” - 4½” | 5 | 3” | V-0.040 | LS-1009 |
| API Full Hole | 2⅞”, 3½”, & 4½” | 5 | 3” | V-0.040 | LS-1009 |
| API Regular | 6⅝” | 4 | 2” | V-0.050 | LS-1007 |
| API Full Hole | 5½” & 6⅝” | 4 | 2” | V-0.050 | LS-1007 |
| API Regular | 5½”, 7⅝”, & 8⅝” | 4 | 3” | V-0.050 | LS-1008 |
| API Numbered Connections | #10, #12, #13, #16 | 6 | 1.5” | V-0.055 | LS-1010 |
| API Regular (Macaroni Tubing) | 1” - 1½” | 6 | 1.5” | V-0.055 | LS-1010 |
| American Open Hole | 2⅜” - 4½” | 4 | 1.5” | V-0.076 | LS-1010 |
| P.A.C. Connections | 2⅜” - 3½” | 4 | 1.5” | V-0.076 | LS-1010 |
| Hughes H-90 | 2⅜” - 6⅝” | 3.5 | 2” | 90-V-0.050 | LS-1011 |
| Hughes H-90 | 7” - 8⅝” | 3.5 | 3” | 90-V-0.050 | LS-1012 |
| Hughes Slimline H-90 | 2⅜” - 3½” | 3 | 1¼” | 90-V-0.084 | LS-1013 |
API Contact Points for Lead Gages
Gagemaker’s standard ball contact points are manufactured with carbide balls. All Gagemaker lead gages use threaded shank contact points. Threaded shanks are #4-48 UNF. Lead gages require two or three contact points. Gages ship with one set of contact points. Additional contact points sold individually and separately.
| Connection Type | TPI | Point Diameter | Model |
|---|---|---|---|
| API Rotary Shouldered Connections | 4 | .144" | T144 |
| API Rotary Shouldered Connections | 5 | .115" | T115 |
| API Rotary Shouldered Connections | 6 | .096" | T096 |
| Hughes H-90 | 3½ | .200" | T200 |
| Hughes Slimline H-90 | 3 | .235" | T235 |
External Thread Lead Inspection
Internal Thread Lead Inspection
Thread Taper Inspection
During the manufacturing process taper must be accurately measured because when a connection is subjected to a service load, taper error can lead to galling, improper fit between threads and eventually reduced performance. Taper is measured on the flanks of a thread and is defined as the change in pitch diameter over the connection length, generally designated in inches per foot.
The JSS® Taper Gages include the IT-6000 series for controlling pin taper values and the ET-7000 series for inspecting box tapers. Both sets of gages inspect variation in connection taper for a range of connection sizes using contact points which seat in the threads. Contact points can be changed out to accommodate different threads per inch.
The taper gages do not need presetting using a setting standard, but do require placing the contact points in the same helical path on several locations on the connection.
Gagemaker’s internal and external taper gages measure variations in connection taper to ensure that the pin and box connectors have matching tapers. Taper errors induce high stresses that can eventually lead to connection failures.
External Taper Gages
Gagemaker’s external taper gages inspect variation in connection taper. External taper gages are shipped with .072” diameter contact points unless otherwise requested. Gages for larger diameters are available. Verify the proper contact point for your particular connection. Higher resolution indicators are available.
| Model | Description | Indicator Travel | Range | Indicator Resolution |
|---|---|---|---|---|
| ET-7003 | External Taper Gage, 1" travel | 1" | 0 - 10" (0 - 254 mm) | .001” |
| ET-7003-1 | External Taper Gage, 1" travel, .0001” resolution | 1" | 0 - 10" (0 - 254 mm) | .0001” |
| ET-7003-5 | External Taper Gage, 1" travel, .0005” resolution | 1" | 0 - 10" (0 - 254 mm) | .0005” |
Internal Taper Gages
Gagemaker’s internal taper gages measure variation in connection taper. Taper gages are shipped with our standard set of .072” diameter contact points, unless specified otherwise. Gages for larger diameters are available. Verify the proper contact point for your particular connection. Higher resolution indicators are available.
| Model | Description | Depth | Range | Indicator Travel | Indicator Resolution |
|---|---|---|---|---|---|
| IT-6000 | Internal Taper Gage | 4¼” | 1½” – 9” (38.1 mm – 228.6 mm) | 1” | .001” |
| IT-6000-5 | Internal Taper Gage, .0005” Resolution Indicator | 4¼” | 1½” – 9” (38.1 mm – 228.6 mm) | 1” | .0005” |
API Contact Points for Taper Gages
Gagemaker’s standard contact points are manufactured with carbide balls. Taper gages use threaded shank contact points. Threaded shanks are #4-48 UNF. Taper gages require two contact points
Gages ship with one set of .072” diameter contact points, unless otherwise specified. Contact points sold separately and individually.
| Connection Type | TPI | Point Diameter | Model |
|---|---|---|---|
| API Rotary Shouldered Connections | 4 | .144" | T144 |
| API Rotary Shouldered Connections | 5 | .115" | T115 |
| API Rotary Shouldered Connections | 6 | .096" | T096 |
| Hughes H-90 | 3½ | .200" | T200 |
| Hughes Slimline H-90 | 3 | .235" | T235 |
External Thread Taper Inspection
Internal Thread Taper Inspection
Thread Height Inspection
Thread height is the distance from the crest of the thread to the root perpendicular to the thread axis. Shallow thread height does not allow sufficient thread engagement and may cause the connection to pull apart under critical loads.
The JSS® Thread Height Gages maximize the performance of threaded connections by providing immediate feedback on the integrity of the thread assembly. The TH-3000 series of thread height gages inspect external and internal thread height for a variety of thread forms. The gages use a precision contact point that seats in the threads of a part during inspection and provides readings on the indicator dial.
Placing the thread height gage on the setting standard to zero the gage before taking measurements will achieve consistent and accurate readings. There are several setting standard models and selecting the proper standard is based on the type of thread being inspected.
The thread height gages provide immediate feedback on the integrity of the threads. Specify the thread form when ordering.
External Thread Height
Gagemaker manufactures external thread height gages. Please specify the thread form when ordering. Gages ship with one contact point (T072), unless specified otherwise. Please verify the proper point for your connection before ordering. Standards sold separately.
| Model | Description | Min. Bore | Indicator Travel | Indicator Resolution | Dial Type | Included Contact Point* | Standard required |
|---|---|---|---|---|---|---|---|
| TH-3000-RSC | External Thread Height Gage, 0-25-0, T072 | 2.930” | .250” | .0005” | 0-25-0, Balanced | T072 | Yes |
| TH-3000-RSC-1 | External Thread Height Gage, 0-25-0, .0001” Resolution Indicator, T072 | 3.730” | .250" | .0001” | 0-25-0, Balanced | T072 | Yes |
| TH-3000-RSC-M | External Thread Height Gage, 0-50-0, Metric Indicator, T072 | 2.930” | 5 mm | .01 mm | 0-50-0, Balanced | T072 | Yes |
*Alternate contact point may be subsituted to match preferred connections. See contact tab for corresponding contact points.
Internal Thread Height
Gagemaker also manufactures internal thread height gages. Please specify the thread form when ordering. Gages ship with one contact point (T072), unless specified otherwise. Please verify the proper point for your connection before ordering. Standards sold separately.
| Model | Description | Min. Bore | Indicator Travel | Indicator Resolution | Dial Type | Included Contact Point* | Standard required |
|---|---|---|---|---|---|---|---|
| TH-3009-RSC | Internal Thread Height, 0-25-0, 1" Base Length, T072 | 1.50” | .250” | .0005” | 0-25-0, Balanced | T072 | Yes |
| TH-3009-RSC-1 | Internal Thread Height, 0-25-0, .0001” Indicator Resolution, 1" Base Length, T072 | 1.50” | .250” | .0001” | 0-10-0, Balanced | T072 | Yes |
*Alternate contact point may be subsituted to match preferred connections. See contact tab for corresponding contact points.
Thread Height Contact Points
Gagemaker’s standard contact points are manufactured with carbide balls and threaded shanks. Thread height gages require one contact point. Gage ships with requested point based on thread form. Additional points are sold separately and individually.
| Thread Form | Taper Per Foot (TPF) | Threads Per Inchi (TPI) | Ball Diameter | Description | Model |
|---|---|---|---|---|---|
| Hughes H-90 | 2, 3 | 3½ | .072” | .072” Thread height contact point for Rotary Shouldered Connections | T072 |
| Hughes Slimline H-90 | 1 | 3 | .072” | .072” Thread height contact point for Rotary Shouldered Connections | T072 |
| V-0.038R | 2, 3 | 4 | .072” | .072” Thread height contact point for Rotary Shouldered Connections | T072 |
| V-0.055 | 1½ | 6 | .072” | .072” Thread height contact point for Rotary Shouldered Connections | T072 |
| V-0.050 | 2, 3 | 4 | .044” | .044” Thread height contact point for Rotary Shouldered Connections | T044 |
| V-0.076 | 1½ | 4 | .072” | .072” Thread height contact point for Rotary Shouldered Connections | T072 |
| V-0.032 | 2 | 6 | .034” | .034” Thread height contact point for Rotary Shouldered Connections | T034 |
| V-0.040 | 3 | 5 | .034” | .034” Thread height contact point for Rotary Shouldered Connections | T034 |
<h6><i>Thread Height Setting Standards</i></h6>
Thread height standards are used to set the gage prior to inspection. Gagemaker manufactures API mandated precision setting standards for presetting thread height gages. Specify the type of thread when ordering.
| Connection Type | Connection Size | TPI | TPF | Thread Form | Required Contact Point | Model |
|---|---|---|---|---|---|---|
| Hughes External Flush | 2⅜” - 2⅞” | 6 | 2” | V-0.032 | T034 | THS-10322-RS |
| API Numbered Connections | #23 - #50 | 4 | 2” | V-0.038R | T072 | THS-10382-RS |
| Double Streamline | 3½” - 5½” | 4 | 2” | V-0.038R | T072 | THS-10382-RS |
| API Full Hole | 4” | 4 | 2” | V-0.038R | T072 | THS-10382-RS |
| Hughes Slim Hole | 2⅜” - 4½” | 4 | 2” | V-0.038R | T072 | THS-10382-RS |
| Hughes External Flush | 3½” - 4½” | 4 | 2” | V-0.038R | T072 | THS-10382-RS |
| Hughes Xtra Hole | 2⅞” - 5” | 4 | 2” | V-0.038R | T072 | THS-10382-RS |
| Internal Flush | 2⅜” - 6⅝” | 4 | 2” | V-0.038R | T072 | THS-10382-RS |
| Wide Open | 2⅜” - 4½” | 4 | 2” | V-0.038R | T072 | THS-10382-RS |
| API Numbered Connections | #56 - #84 | 4 | 3” | V-0.038R | T072 | THS-10383-RS |
| API Regular | 2⅜” - 4½” | 5 | 3” | V-0.040 | T034 | THS-10403-RS |
| API Full Hole | 2⅞”, 3½”, & 4½” | 5 | 3” | V-0.040 | T034 | THS-10403-RS |
| API Regular | 6⅝” | 4 | 2” | V-0.050 | T044 | THS-10502-RS |
| API Full Hole | 5½” & 6⅝” | 4 | 2” | V-0.050 | T044 | THS-10502-RS |
| API Regular | 5½”, 7⅝”, & 8⅝” | 4 | 3” | V-0.050 | T044 | THS-10503-RS |
| API Numbered Connections | #10, #12, #13, #16 | 6 | 1.5” | V-0.055 | T072 | THS-10551.5-RS |
| API Regular (Macaroni Tubing) | 1” - 1.5” | 6 | 1.5” | V-0.055 | T072 | THS-10551.5-RS |
| American Open Hole | 2⅜” - 4½” | 4 | 1.5” | V-0.076 | T044 | THS-10761.5-RS |
| P.A.C. Connections | 2⅜” - 3½” | 4 | 1.5” | V-0.076 | T044 | THS-10761.5-RS |
| Hughes H-90 | 2⅜” - 3½” | 3.5 | 2” | 90-V-0.050 | T072 | THS-10H90-2 |
| Hughes H-90 | 7” - 8⅝” | 3.5 | 3” | 90-V-0.050 | T072 | THS-10H90-3 |
| Hughes Slimline H-90 | 2⅜” - 3½” | 3 | 1” | 90-V-0.084 | T072 | THS-SL-H90 |
External Thread Height Inspection
Internal Thread Height Inspection
