GCR15 Steel Cylindrical Locating Pin 3mm – 18 Lengths Available

GCR15 Bearing Steel Cylindrical Locating Pins – High Precision, High Hardness

Engineered for demanding industrial and mechanical applications, these GCR15 bearing steel cylindrical locating pins deliver exceptional dimensional accuracy, outstanding hardness, and superior wear resistance. Whether you're building jigs and fixtures, assembling precision machinery, or working on tooling projects, these round pins provide the reliable fit and alignment you need.

Key Specifications

• Material: GCR15 Bearing Steel (high-carbon chromium steel)
• Hardness: HRC 58–63°
• Process: Quenching heat treatment for maximum durability
• Surface Roughness: Ra 0.4 – ultra-smooth finish for precision fit
• Diameter: 3mm
• Available Lengths: 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 25, 26, 28, 30mm
• Diameter Tolerance: +0 / −0.01mm
• Length Tolerance: +0 / −0.3mm
• Torque Capacity: 300
• Country of Origin: Made in Mainland China

Why Choose GCR15 Steel Locating Pins?

• ✅ High hardness (HRC 58–63°) ensures long service life even under repeated loading
• ✅ Quenching heat treatment maximizes structural integrity and wear resistance
• ✅ Ra 0.4 surface finish guarantees smooth, precise mating in bores and housings
• ✅ Tight diameter tolerance (+0/−0.01mm) ensures accurate, repeatable positioning
• ✅ 18 length options from a single 3mm diameter for versatile application coverage

Common Applications

• Jig and fixture alignment
• Precision machinery assembly
• Mold and die positioning
• Tooling and workholding setups
• Mechanical linkage and pivot points
• DIY projects requiring accurate pin alignment

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Frequently Asked Questions

Q: What material are these cylindrical locating pins made from?

A: These locating pins are made from GCR15 high-carbon chromium bearing steel, which is renowned for its high hardness, excellent wear resistance, and dimensional stability. Each pin undergoes quenching heat treatment to achieve a hardness of HRC 58–63°.

Q: What diameter and lengths are available?

A: All pins in this listing are 3mm in diameter. You can select from 18 different lengths: 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 25, 26, 28, and 30mm. The tight diameter tolerance of +0/−0.01mm ensures accurate, consistent fit across all lengths.

Q: What is the surface roughness of these pins?

A: The surface roughness is Ra 0.4, providing an ultra-smooth finish that allows these cylindrical locating pins to seat precisely in bores and housings without excessive play or friction.

Q: Are these pins suitable for precision tooling and fixture work?

A: Yes. The combination of GCR15 bearing steel, HRC 58–63° hardness, Ra 0.4 surface finish, and tight tolerances makes these pins ideal for jigs, fixtures, molds, dies, and any application requiring accurate and repeatable component positioning.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.