High-Precision Hardened Steel Pin Gauges | Gcr15 Bearing Steel Measuring Pins
- Premium Material: Manufactured from high-quality Gcr15 bearing steel/HSS with 58-65 HRC hardness.
- High Cost-Effectiveness: The most versatile and economical solution for workshop-level precision inspection.
- Sub-Zero Treatment: Processed with advanced cryogenic treatment to ensure long-term dimensional stability.
- Micron Accuracy: Available in 0.001mm increments, strictly conforming to Class Z, X, or XX tolerances.
- Certified Inspection: 100% verified by Swiss TESA and German Feinmess Jena equipment in 20°C constant temperature labs.
Hardened Steel Pin Gauge
In mechanical machining and quality control processes, hardened steel pin gauges (bearing steel/high-speed steel pin gauges) are the most widely used and cost-effective tools for hole diameter inspection.
The Mihe Precision (MISHUTE) hardened steel pin gauge series is made from high-quality GCr15 bearing steel and undergoes strict heat treatment and sub-zero treatment. This process effectively eliminates residual stress in the material, ensuring extremely high dimensional stability during long-term use.
As a classic product of Mihe Precision, our hardened steel pin gauges not only feature excellent hardness (HRC 58–65) and superior surface finish, but also pursue extreme precision in manufacturing. Whether used individually or as GO/NO-GO gauge sets, they provide fast and accurate on-site inspection in workshop environments.
Each hardened steel pin gauge is supplied with a Mihe factory inspection report, making it an essential high-precision reference tool for machining, metal cutting, and mold manufacturing industries.
- High Hardness & Stability：Made from high-quality alloy steel and precisely heat-treated to achieve a hardness of HRC 58 or above, the gauges are further enhanced through sub-zero treatment. This process effectively prevents dimensional shrinkage or expansion caused by minor environmental temperature changes or long-term use, ensuring consistently reliable measurement results.
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Mirror-Polished Surface：The surface is precision ground and polished to a roughness of Ra ≤ 0.02 μm. This ultra-high level of surface finish reduces friction during measurement, allowing smoother insertion into bore diameters while effectively preventing scratches or damage to the surface of the workpiece being inspected.
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Versatile Customization：We not only offer standard sets in both metric and imperial systems, but also support custom diameters from 0.1 mm to 30 mm with increments as fine as 0.001 mm. This meets the inspection requirements of various special deep holes and precision clearance applications.
Technical Specifications
Order No | Specifications (Clearance 0.01) | Quantity(pcs) | Order No | Specifications (Tolerance 0.01) | Quantity (pcs) |
MH-W-A0001 | 0.10-0.50 | 41 | MH-W-A0011 | 5.00-5.50 | 51 |
MH-W-A0002 | 0.50-1.00 | 51 | MH-W-A0012 | 5.50-6.00 | 51 |
MH-W-A0003 | 1.00-1.50 | 51 | MH-W-A0013 | 6.00-6.50 | 51 |
MH-W-A0004 | 1.50-2.00 | 51 | MH-W-A0014 | 6.50-7.00 | 51 |
MH-W-A0005 | 2.00-2.50 | 51 | MH-W-A0015 | 7.00-7.50 | 51 |
MH-W-A0006 | 2.50-3.00 | 51 | MH-W-A0016 | 7.50-8.00 | 51 |
MH-W-A0007 | 3.00-3.50 | 51 | MH-W-A0017 | 8.00-8.50 | 51 |
MH-W-A0008 | 3.50-4.00 | 51 | MH-W-A0018 | 8.50-9.00 | 51 |
MH-W-A0009 | 4.00-4.50 | 51 | MH-W-A0019 | 9.00-9.50 | 51 |
MH-W-A0010 | 4.50-5.00 | 51 | MH-W-A0020 | 9.50-10.00 | 51 |
Industry Applications
Automotive
Precision gauges help automotive manufacturers verify critical dimensions, bores, shafts, and threads, supporting high-volume production, assembly accuracy, and quality consistency.
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Medical
Precision gauges support the inspection of critical dimensions in medical components and instruments, helping manufacturers maintain accuracy, consistency, and reliable quality control.
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New Energy
Precision gauges support dimensional inspection of components used in batteries, electric vehicles, and energy systems, helping maintain accuracy, consistency, and production quality.
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Electronics
Precision gauges enable reliable inspection of small holes, shafts, and critical dimensions in semiconductor components, supporting tight tolerances and consistent manufacturing.
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Aerospace
Precision gauges help verify critical dimensions, holes, shafts, and threads in aerospace components, supporting tight tolerances, reliable assembly, and stringent quality control.
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Machine Tooling
Precision gauges help machining manufacturers verify bore, shaft, thread, and critical dimensions, supporting accurate production, process control, and consistent quality.
linkPackaging & Shipping
Anti-rust protection
Color-coded labeling
Heavy-duty packaging
FAQ about Hardened Steel Pin Gauges
hardened steel contains high carbon and chromium content. Although it is heat-treated, it still requires rust prevention. After use, it is recommended to wipe the gauge clean with a lint-free cloth and apply a small amount of dedicated anti-rust oil. The gauges should be stored in a dry, constant-temperature environment. For completely maintenance-free solutions, we recommend our “ceramic pin gauge” series.
The biggest advantages of hardened steel pin gauges are their high cost-effectiveness and good toughness. They are resistant to accidental drops and impact, and their thermal expansion coefficient is similar to most metal workpieces. This provides a natural temperature compensation effect when measuring in non-temperature-controlled workshop environments.
Our manufacturing process includes rough grinding, precision grinding, and super finishing, followed by final inspection in a constant-temperature laboratory. With 100% full inspection using Swiss TESA and German Feinmess Jena length measuring instruments, we ensure that every pin gauge delivered to customers fully meets its specified tolerance.
All steel gauges will experience slight wear after frequent measurement of hard materials. We recommend regular periodic calibration. Mihe Precision provides comprehensive after-sales consultation to help you determine whether the gauge still meets your usage requirements.