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 Fixed Limit Gage Fact Sheet
This document provides a gagemaker tolerance chart for selecting gage tolerances as well as tolerance direction for various gages. The fact sheet also explains how to properly determine gage tolerance for measurement applications. The fact sheet offers tips on the proper care and usage of gages.
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 Class ZZ Plain Pin Gage Sets and Libraries
Thread Check, Inc. offers Vermont Class ZZ plain pin gage sets and libraries in steel and Black Gaurd™. Class ZZ pin gages are economically priced. Make quick and accurate measurements with Vermont Gage pin gages. Measure hole sizes. Calculate distances between holes. Gage slot widths. Use ZZ pin gages for Go/No Go fixed limit gaging. Size in micrometers and snap gages. Vermont class ZZ pin gages are ideal for making frequent and varied measurements. Pin gages are available in plus or minus tolerances. Pin gages are available in .0005” or .02mm sizes. Vermont pin gages are 2.0’ in length and made of 52100 tool steel. Vermont pin gages are NIST traceable.
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 Class ZZ Replacement Pin Gages and Assemblies
Keep old sets in compliance. Replace missing, damaged, or worn out class ZZ gages from your existing sets and libraries. Class ZZ assemblies are a great Go/No Go inspection tools. Make quick and accurate measurements with Vermont Gage pin gages. Measure hole sizes. Calculate distances between holes. Gage slot widths. Use ZZ pin gages for Go/No Go fixed limit gaging. Size in micrometers and snap gages. Vermont class ZZ pin gages are ideal for making frequent and varied measurements. Pin gages are available in plus or minus tolerances. Pin gages are available in .0005” or .02mm sizes. Vermont pin gages are 2.0’ in length and made of 52100 tool steel. Vermont pin gages are NIST traceable. Replacement pin gages are packaged in rust –preventative bags and individually labeled with size, tolerance direction, and NIST traceable numbers.
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 Standard Class X Economy Plug Gages
Standard Class X Plug Gages are value priced and stocked in plus tolerances up to 1.0”. Use standard class X plug gages as masters to calibrate measuring equipment or to gage parts directly. Class X economy plug gages have + .000040”. Class X economy plug gages are perfect for both the shop floor and metrology laboratory. Economy class X gages are available in sizes from .004” – 1.00 in increments of .0001”. Class X economy plug gages are 2.0” in length and have a 2 micro inch finish or better. A certificate of accuracy traceable to NIST is included with each gage.
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 Custom Reversible Plain Plug Gages
Thread Check, Inc. offers an extensive line of cylindrical plain reversible plug gages from .002” – 1.0100” from class ZZ to XXX gagemaker tolerances. Reversible style plug gages are available in steel, chrome, carbide, and ceramic materials. All steel gages are made of high quality 52100 tool steel hardened to 60/62 Rc. All standard gages are 2.0” in length. Special length gages are available up to 6.0” length. Pin gages can be manufactured to a diameter as small as .002”. All gages are ground lapped to a 5 micro inch surface finish or better. Special features such as depth notches, air flats, pilots, radius, and chamfers are priced on request. Other gage capabilities include hex gages, square gages, hole location gages, concentricity gages, alignment gages, template gages, tapered gages, and special gages per customer drawings.
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 Custom Reversible Micro Size Plain plug Gages
Thread Check Inc offers micro sized pin gages from .0015” inches to .0049”. Thread Check, Inc. also offers micro sized pin gages in metric sizes from .038mm to .124mm. Pin gages can be manufactured in a full range of gagemaker tolerances from class ZZ to class XX. All pin gages are made of quality tool steel hardened between 60 – 62 Rc. All gages are 2” in length. All pin gages are ground lapped to a 5 micro inch surface finish or better. All pin gages are traceable to the National Institute of Standards and Technology. Use pin gages to calibrate measuring equipment or to check hole sizes directly.
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Custom Reversible Class XXX Tolerance Plain Plug Gages
Thread Check, Inc. offers class XXX plain pin gages from .005” / .127mm and up for the most demanding tolerance requirements. Class XXX gage pins have a tolerance of .000010”. This tolerance can be applied as a plus tolerance, minus tolerance, or split or master tolerance. All pin gages are made of quality tool steel hardened between 60 – 62 Rc. All gages are 2” in length. All pin gages are ground lapped to a 5 micro inch surface finish or better. All pin gages are traceable to the National Institute of Standards and Technology. Use pin gages to calibrate measuring equipment or to check hole sizes directly.
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 Taperlock Style Plug Gage
All cylindrical taperlock style plug gages are manufactured per ANSI/ASME B47.1 AGD standard and ANSI/ASME B89.1.5 standard. Taperlock style plug gages are used to gage large diameters. Taperlock style gages can be quickly changed by popping out the gage member and press fitting a new member into the handle. Thread Check, Inc. offers the taperlock style from sizes of .1050” up to 1.510” in steel, chrome, and carbide materials. Larger diameters are quoted on request. Special features such as depth notches, air flats, pilots, radius, and chamfers are priced on request.
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 Trilock Style Plug Gages
All trilock cylindrical plug gage are manufactured to ANSI/ASME B47.1 AGD standard and ANSI/ASME B89.1.5 standard. Trilock gages are used to inspect large diameters. Like reversible gages, when one end wears out, the gage end can be turned around. Trilock sizes are available from .760” up to 8.010” in steel, chrome, and carbide materials. Special features such as depth notches, air flats, pilots, radius, and chamfers are priced on request.
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 Progressive Cylindrical Plug Gages
Progressive cylindrical plug gages have the Go and No Go stepped on a single gage member so parts can be quickly inspected in one operation. Progressive cylindrical plug gages plug gages are available up to 8.00" in class ZZ, Z, Y, X, and XX tolerances. All steel progressive cylindrical plug gages are hardened to 60/62 Rc and progressive chrome gages are hardened to 70/72 Rc. All gages are traceable to NIST.
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 Custom Hex Gages
Thread Check, Inc. offers a complete line of Go/No Go Hex plug gages manufactured to both specs ANSI/ASME B107.17M and ANSI B18.3. Hex plug gages are perfect for inspecting machine head fasteners. Special diameter hex gages are priced on request.
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 Plain Ring Gages
Thread Check, Inc. offers an extensive line of cylindrical plain ring gages from .015" - 30" in class ZZ to XXX gagemaker tolerances. Ring gages are available in steel, chrome, carbide, and ceramic materials. Plain ring gages are ideal for use as master and go/no go gaging. Use plain ring gages to efficiently inspect external dimensions of manufactured parts. With go/no go ring gaging, an inspector can quickly pass or fail parts without taking time consuming readings from a measuring instrument. Plain ring gages can be used to set cylinder bore gauges, air gages, and internal micrometers. By using the same size master ring gages, lead errors on measurements can be eliminated.
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 Master Setting Discs
Master setting discs are used to calibrate and set comparators, snap gages, and other precision measuring instruments. All master setting discs are manufactured per ANSI/ASME B47.1. Master setting discs are supplied in steel, chrome, or carbide. Master setting discs are available in 3 styles. The roundness and taper of master setting discs does not exceed 50% of the gagemakers size tolerance and is non cumulative. All master setting discs are supplied with insulator grips to prevent heat distortion. Master discs are available up to 23” in diameter. All master discs are traceable to NIST.
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 AGD Limit Snap Gages
AGD limit snap gages are used for quick and accurate production inspection. Gaging surfaces are manufactured of hardened, ground, and lapped tool steel. All AGD snap gages are manufactured per ANSI/ANSI B47.1 – 1988. Set and sealed snap gages are traceable to NIST.
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 Flexbar
Triga-Bore ™ / True - Bore Gauges
Tru-Bore Gaging system is the result of over 25 years of design and manufacturing of 3 point contact gaging systems. The bore gaging system is ideal for solving internal diameter measurement problems on the shop floor and inspection area. The system is available in a large measuring range for specific applications. Mechanical and digital dial gages as well as linear probes can be used as specified. Tru- Bore heads have a large measuring range and are supplied with fixed anvils eliminating operator error. 24 heads cover .236” – 7.87”. The unique system design allows two measuring handles or a pistol grip Triga Bore to cover .236” – 7.87”. Extensions are available for increased gaging depths. The bore gage can be used for special applications such as threads, O ring grooves, and spherical forms. Triga-Bore system sets are priced on request.
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