Thread Measuring

Bowers Group provides a range of innovative thread measuring equipment for global industry, with solutions including thread profile gauges to check form and pitch, and both standard and bespoke solutions for precision thread diameter measurement.

As UK Distributors for Gagemaker, a Houston based manufacturer of precision inspection equipment and measuring devices for the Quality Control industry, we can offer solutions including thread diameter measurement, API thread inspection, and large diameter measurement.

  • Thread Gauging
    XT Threads - The Best Way to Measure Internal Thread Diameters As the world’s leading bore gauge manufacturer, we offer a range of both standard and bespoke solutions for precision thread diameter measurement. Individual Thread Gauging Heads

    • M4 – M300 (metric)
    • No8 – 12” (imperial) • Metric, UN, Buttress, Acme, Trapezoidal, Ball screw and non-standard forms available
    • Left and right handed available
    • 2 Point or 3 Point available
    • Very rapid measurement of threads
    • Reduce machining time by giving the operator an actual measurement when forming the thread
    • Negates the need for many different hard gauges, incl. pre/post plate, pre/post H/T, different classes, etc. Therefore annual re-calibration costs reduced massively
    • Effective (Functional), Pitch & Major measurement
    • Calibrate from thread rings (Plain ring for Major Diameter)
    • Rings marked with actual PD

    Each of these application heads can be fitted directly to our Bluetooth XT range of internal micrometers in seconds for fast, efficient use with incredibly accurate results that can be digitally recorded.

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    Pneumatic Actuator for Automatic Measurement of Ballscrew Nuts Measurement of pitch diameter in ballscrew nuts on automatic machine. Match gauging of the ball circuit allows the optimum ball sizes to be selected for the required preload of the ballscrew bearing assembly. The Solution: The solution developed by Bowers' Specials Applications Team comprised an Actuating Unit and Ballscrew Head, fitted to customers' fully automatic machine. Actuating Unit: • Gauge body with constant measuring pressure and fast operation • Pneumatic cylinder (3 Bar pressure required) to actuate the unit • Supplied with Sylvac transducer probe and D302 multiplexer for output to PLC • Internal workings enclosed in protective cover • Mounting holes on rear of actuator body to allow fixing into customers assembly Ballscrew Head: • Precision 3 point measuring head with tungsten carbide ball contacts to locate in ball circuit and replicate final application using ball sizes matching the nominal ball size of the particular ballscrew assembly • Various heads available customised to suit BCD, ball size, lead and direction (RH/LH) Features: • Automatic or semi-automatic measurement of internal features • Can be used for threads, grooves, splines, etc Potential Industries: • Automotive - ballscrew manufacture/assembly • Aerospace • Machine Tools • Bearing Manufacture

    Threads Explained


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    Custom Thread Gauging If our generic thread anvil profile is not suitable for your application, please contact us with your requirements and our team will design a bespoke head, perfectly tailored to fit your specific application. Our custom application heads can be fitted directly onto our XT range of internal micrometers to create a flexible, modular measuring system.


    Contact us for more information


    Lead Times • THRH & THRR product codes lead times = 5-7 days subject to stock • Custom thread gauge lead-time = 2-4 weeks


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  • UN Series Thread Rolls
    All thread rolls are sold in matched pairs which come complete with Gagemaker Certificate. These thread rolls inspect the functional fit of machined parts with 60° "V" thread forms.
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  • UN Series Thread Rolls
    All thread rolls are sold in matched pairs which come complete with Gagemaker Certificate. These thread rolls inspect the functional fit of machined parts with 60° "V" thread forms.
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  • Contact Points
    Gagemaker's standard ball contact points are manufactured with spherical chrome balls with threaded shanks of 4-48 UNF. Contact sizes are matched closely to thread inspection wire sizes. The contact diameters listed are used in the TDWIN Thread Disk for Windows software program for pitch diameter inspection.
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  • Tubing and Casing Taper Setting Blocks - Mic Trac
    The Gagemaker MIC TRAC is a multi-use gauge setting system. The system sets or zeros most gauges with the use of interchangeable anvils or blocks. Standard resolution of base unit is 0.00005". Accuracies range from +/- 0.0001" to +/- 0.0004". The MIC TRAC is also available as a multi-use gauge calibration system. These MIC TRACs incorporate the ForeLok™ feature to provide a constant anvil force that improves repeatability from operator to operator. Please ask the Bowers sales team for details.
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  • ISO Metric Series Thread Rolls
    TRM thread rolls inspect the functional fit of machine threaded parts with ISO metric 60° "V" threadforms.
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  • ACME and STUB ACME Thread Rolls
    TRA & TRSA thread rolls inspect the functional fit of parts with 29° ACME and Stub ACME thread forms.
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  • Mic Trac Gauge Setting System
    The Gagemaker MIC TRAC is a multi-use gauge setting system. The system sets or zeros most gauges with the use of interchangeable anvils or blocks. Standard resolution of base unit is 0.00005". Accuracies range from +/- 0.0001" to +/- 0.0004" depending on the machine capacity. The MIC TRAC is also available as a multi-use gauge calibration system. These MIC TRACs incorporate the ForceLok™ feature to provide a constant anvil force that improves repeatability from operator to operator. Please ask the Bowers sales team for details.
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  • Pitch Diameter Inspection Gauges
    The Gagemaker PD-6000 and PD-8000 Series gauges measure Pitch Diameters of internal, and external threads. The gauges can be preset to a nominal predetermined dimension using gauge blocks, micrometers, or the MIC TRAC gauge setting system.
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  • Pitch Diameter Inspection Gauges
    The Gagemaker PD-6000 and PD-8000 Series gauges measure Pitch Diameters of internal, and external threads. The gauges can be preset to a nominal predetermined dimension using gauge blocks, micrometers, or the MIC TRAC measurement centre.
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