United Broach manufactures precision plug gauges, ring gauges, spline gauges and custom profile gauges for dimensional inspection and quality control across automotive, transmission, defence and heavy engineering manufacturing.
Alongside our broaching tools, United Broach manufactures the precision inspection gauges that verify the components those tools produce — plug gauges, ring gauges, spline gauges and custom profile gauges built to the same exacting standards since 2005.
Precision gauges are dedicated dimensional inspection tools used to quickly and reliably verify that a manufactured component falls within its specified tolerance range, without requiring a full measurement cycle on a coordinate measuring machine for every part. They are essential on high-volume production lines where rapid, repeatable pass/fail verification is needed at multiple stages of manufacturing.
United Broach manufactures plug gauges for checking bore diameters, ring gauges for checking shaft and external diameters, spline gauges (GO/NO-GO) for verifying internal and external spline profiles, and fully custom profile gauges engineered to check special features unique to a customer's component design.
While coordinate measuring machines and other precision instruments can provide detailed dimensional data, they are often too slow for use at every inspection point on a high-volume production line. Dedicated gauges allow shop floor operators to perform a rapid, reliable pass/fail check in seconds, catching out-of-tolerance parts immediately rather than after a batch has already moved downstream. This makes gauges an essential complement to — not a replacement for — full dimensional measurement during process validation and periodic quality audits.
Every gauge manufactured at United Broach begins with a careful review of the component drawing and the relevant tolerance specification, whether defined by the customer directly or referencing a recognised standard. Gauges are manufactured from hardened and precision-ground tool steel, selected for long-term dimensional stability and resistance to wear from repeated use on the shop floor.
After grinding and heat treatment, every gauge is verified using precision measuring equipment — including micrometers, height gauges, optical comparators and coordinate measuring machines — to confirm the gauge itself meets the required dimensional accuracy before it is approved for dispatch. This double layer of verification (the gauge checking the part, and our own inspection checking the gauge) is fundamental to maintaining traceable quality throughout the supply chain.
Because United Broach manufactures both broaching tools and inspection gauges in-house, we are well positioned to supply matched sets — a spline broach and its corresponding spline gauge, for example — ensuring the inspection tooling accurately reflects the exact profile the broach produces. This reduces the risk of inspection discrepancies that can occur when broaches and gauges are sourced from different suppliers using slightly different interpretations of the same drawing.
Gauges wear over time through repeated contact with production parts, and dimensional drift can eventually push a gauge outside its acceptable tolerance band. United Broach offers recalibration, regrinding and refurbishment services to restore worn gauges to their original specification, helping customers extend the working life of their inspection tooling investment rather than replacing gauges entirely on a fixed schedule.
For automotive, tractor, defence and aerospace manufacturers operating under strict supplier quality requirements, having access to precisely manufactured, properly calibrated gauges is essential to maintaining consistent part quality and passing customer or third-party quality audits. United Broach's ISO 9001:2015 certified manufacturing process ensures every gauge we supply meets this standard.
Indicative manufacturing range for precision gauges. Exact specification confirmed against customer drawing or applicable standard.
| Parameter | Specification Range |
|---|---|
| Gauge Types | Plug, Ring, Spline (GO/NO-GO), Profile, Keyway/Slot |
| Diameter Range | Up to 250 mm (application dependent) |
| Material | Hardened & Precision Ground Tool Steel |
| Standards Supported | DIN, SAE, ANSI, Custom Drawing-Based |
| Tolerance Class | As per drawing / applicable gauge tolerance grade |
| Surface Finish | Ra 0.2 µm and finer on functional surfaces |
| Matched Sets | Available alongside corresponding broaching tools |
| Recalibration | Regrinding & refurbishment services available |
Precision gauges manufactured by United Broach support quality control across critical manufacturing operations.
Plug gauges for checking internal diameters on machined components.
Ring gauges for verifying external shaft and component dimensions.
Spline gauges verifying tooth form and fit on broached components.
Keyway gauges verifying width, depth and position accuracy.
Fast pass/fail inspection tooling for high-volume manufacturing lines.
Gauges supporting supplier quality audits and incoming material checks.
Precision inspection gauges trusted across critical manufacturing sectors.
Precision gauge manufacturing backed by ISO certification and decades of tooling expertise.
Quality management systems audited and certified to international standards.
Gauges manufactured alongside corresponding broaching tools for consistency.
Every gauge inspected against the approved drawing before dispatch.
Gauges supplied internationally under strict inspection norms.
Regrinding and refurbishment to extend gauge service life.
Structured production planning for consistent delivery.
Common questions about our precision gauge manufacturing capability.
We manufacture plug gauges, ring gauges, spline gauges (GO and NO-GO), profile gauges, and custom dimensional inspection gauges designed to verify specific features on customer components, including bore diameters, spline forms, keyway dimensions and special profiles.
A GO/NO-GO gauge is a dimensional inspection tool with two ends or two separate gauges: the GO gauge should fit or pass into the feature being checked if the dimension is within the lower tolerance limit, while the NO-GO gauge should not fit if the dimension is within the upper tolerance limit. Together they provide a fast pass/fail dimensional check without requiring a full measurement instrument.
Yes. We design and manufacture custom inspection gauges based on customer drawings, including gauges for spline profiles, keyway dimensions, bore diameters and special component features requiring dedicated inspection tooling.
Gauges are manufactured from hardened and ground tool steel to ensure long-term dimensional stability and wear resistance, with surface finish and hardness specifications matched to the inspection application and expected usage frequency.
Every gauge manufactured at United Broach is verified using precision measuring equipment including micrometers, height gauges, profile projectors and coordinate measuring machines to confirm dimensional accuracy against the approved drawing before it is dispatched to the customer.
Yes. We commonly manufacture matched spline gauge sets alongside the corresponding spline broach, ensuring the inspection gauge accurately reflects the exact profile produced by the broaching tool for consistent quality verification on the production line.
Our gauges are used across automotive and tractor component manufacturing, transmission and gearbox production, defence and aerospace component inspection, and general heavy engineering quality control applications requiring dedicated dimensional verification tooling.
Yes. We offer recalibration, regrinding and refurbishment services for worn gauges to restore dimensional accuracy and extend their service life, helping customers avoid the cost of replacing inspection tooling entirely.
Share your component drawing or tolerance specification for a manufacturing quote.
Send us your gauge requirement for a technical evaluation and quotation.