June 2013 Newsletter: Back to the Basics: Thread Lead

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LG-6001
LG-6001

LS-1005
Lead Standard

Back to the Basics:
Thread Lead

LG-6001onPipe

Lead the Way
Thread Lead is one of the most important thread elements to monitor. For rotary shouldered connections, tubing connections, and casing connections, not only is lead inspection an industry wide practice, it is an API mandated requirement. For straight threads, lead can directly affect the functional size of a part.

Thread lead is the distance between threads, measured on a plane parallel to the centerline of the threaded part. Lead variation has a direct effect on functional diameter, stand-off, thread flank engagement, and make-up.
LG5002onStrPart
Inspecting Lead on a Straight Thread
LG5002GageTip
Measuring Locations Found with the Highest Frequency of Lead Error
Lead error is most commonly generated by manual and CNC lathes not cutting properly. Therefore, it’s important to take measurements at the locations where the most lead error typically occurs.

These readings help detect machine tool error and worn lead screws on your lathe. So not only can you ensure the quality of your part, but also of your machines.

Gagemaker knows how vital lead is to your parts so we proudly announce the launch of our new lead gage, the LG-6001, featuring….
LG-6001
LG-6001 Lead Gage
Comfortable ergonomic design
Easy setup and operation
Contact point spacing for all API and Premium threads
Accuracies available: ±.0005″ or ±.0001″
Field repairable with easy change indicator
Available in both load flank and stab flank models
Smooth, repeatable movement
Uses Gagemaker Lead Standards

Look for more Gagemaker’s Back to the Basics in the months ahead!

Contact us today at orderdesk@gagemaker.com or here for more information!
Thread Height Gages
Functional Thread Size Gages
Pitch Diameter Size Gages
Thread Lead Gages
Thread Profile Templates
Functional Rolls
Pitch Diameter Ball Contacts
TDWIN Thread Calculation Software
MIC TRAC 3000 Series

Related Articles:
Gage Tips
Gagemaker White Paper
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Gagemaker, LP develops and manufactures innovative precision mechanical inspection equipment for the Oilfield, Automotive and General Machining industries. Recognized as the leading provider of Tapered & Straight Thread Measurement Gages; API Products, Tubing and Casing Gages, Engineering Software and Calibration Software & Equipment, Gagemaker products are used in countless facilities around the world.