Rotary Shouldered Connection JSS®Thread Inspection System

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.

Rotary Shouldered Connections

Tubing and Casing Connections

• 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

TDWIN Taper is available in single and multi-user models. Multi-user models may be adjusted to a customer specific number. Contact customer service for more information.

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

Thread form accuracy is important if two connectors are to make-up properly. Using a JSS Thread Profile Gage and a JSS Thread Addendum Gage provide a quick check of the thread to ensure that the form is correct. Thread form verification ensures form accuracy. 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 and ensures form accuracy.

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.

Pitch diameter is the most critical measurement in machining threads. The JSS Pitch Diameter Locating Templates and JSS Pitch Diameter Gages give you control over your threading quality. When pitch diameters don’t meet specification, it allows the connection to flex while drilling, ultimately causing galling and connection failure.

Now, operators are able to inspect both new and used pipe threads using precision Pitch Diameter Gages that allow them to pinpoint early signs of stress, perform preventative maintenance, and extend the life of their drill string connections. By measuring the pitch diameters, the operators can directly control the connection’s size during manufacturing, as well as ensure that the thread cones go into interference properly when the connections are torqued together.

In the past, pitch diameter has been ignored as long as the ring or plug gage threaded to an acceptable standoff. Using a pin location profile (LPP) and a PD-8000-RSC Series gage(pin) or a box location profile (LPB) with an IT-5104-RSC (box) provides you plenty of control. The process of locating and measuring the pitch diameter takes less than a minute. This minute of inspection quickly decides the difference between good quality and bad quality.

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.

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 points tab to find the 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.

Internal Pitch Diameter

Gagemaker’s internal pitch diameter gages measure variation in internal thread pitch diameters. Pitch diameter gages are shipped with one set of contact points, please see the points tab to request proper points. Setting dimensions for the pitch diameter gages are provided by the TD Win Taper™ software package. Gages require setting with either a standard or a MIC TRAC™. TD Win Taper Software , MIC TRAC™ , contact points, and standards are sold separately.

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.

API Contact Points for Pitch Diameter Gages

Gagemaker’s standard ball contact points are manufactured with carbide balls. All RSC inspection gages use threaded shank contact points. Threaded shanks are #4-48 UNF. Pitch diameter gages require two contact points. Sold individually.

Lead Gages

The lead gage inspects thread lead using contact points that seat in the threads of a part. Thread lead is the distance between threads, measured on a plane parallel to the centerline of the threaded 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.

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

Gagemaker’s precision lead gage setting standards are manufactured in accordance with API Specification 7-2. Lead gage standards are used to set the gage prior to the inspection.

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.

Thread taper is another inspection required by API Spec 7. For accurate taper inspections, use the JSS Taper Gages to verify that the pin and box connectors will have matching tapers. As connectors are made up, taper errors induce high stresses that eventually can lead to connection failure.

Thread taper is the change in pitch diameter over the length of a connection, typically designated in inches per foot. For all rotary shouldered connections, measuring thread taper is not only an industry wide practice; it is an API mandated inspection.

During the manufacturing process, taper must be accurately measured and quantified to avoid mismatched tapers. When under a service load, mismatched tapers between pins and boxes diminish proper thread engagement resulting in reduced connection performance.

Gagemaker’s IT-6000 and ET-7000 series gages are the best choice for measuring and controlling both pin and box taper values within the required specification limits. When RSC connections are properly manufactured utilizing Gagemakers precision taper gages, product performance is maximized.

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.

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.

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 and other contact points are available. Sold individually.

Proper thread height maximizes the performance of any threaded connection and is a required inspection by the API. Thread height not only affects the interchangeability but also the integrity of a thread assembly. Thread height is the distance between the crest and the root, normal to the axis of the thread and several issues can be easily detected by simply inspecting thread height.

Gagemaker Thread Height Gages provide immediate feedback on how the thread height compares to the specification requirements. A shallow thread height may allow the connection to pull apart under critical loads.

From detecting a chipped tool to preventing a connection from pulling apart under critical loads, inspecting thread height is valuable. Thread Height Gages inspect both internal and external thread height for a variety of thread forms and provide immediate feedback on the integrity of your threads.

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 on the points tab before ordering. Standards sold separately.

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.

Thread Height Contact Points 

Gagemaker’s standard contact points are manufactured with carbide balls. Thread height gages require one contact point. Points are sold individually.