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Single-Sided Round Key

(One Round End Parallel Key)

A Single-Sided Round Key features one rounded end and one flat end, designed for applications requiring easy installation, removal, or axial positioning. Unlike standard rectangular keys, the rounded tip facilitates insertion and alignment, making it ideal for detachable drive assemblies.

Commonly used for positioning and torque transmission in gears, pulleys, and couplings.

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s45c製作的單邊圓頭鍵
304白鐵不銹鋼製作的單圓頭鍵
316白鐵製作的單圓頭鍵

Product Features

  • Design: One rounded end and one flat-cut end for easy insertion, removal, and axial positioning

  • Standards: Based on modified JIS B 1301 / DIN 6885 types

  • Usage: Mates with keyways on shafts and hubs; suitable for fixed or sliding assembly

  • Versatility: Ideal as a positioning key, anti-loosening key, or quick-mount key element

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Material & Surface Treatment

  • S45C (Carbon Steel):
    Heat treatable to HRC20–45 for increased torque resistance and wear durability

  • SUS304 (Stainless Steel):
    Corrosion-resistant; suitable for food processing, electronics, and automation machinery

  • SUS316 (Stainless Steel):
    Enhanced corrosion resistance; ideal for marine, medical, and high-humidity applications

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Size Range

  • Width (b): 3mm – 32mm

  • Height (h): 3mm – 20mm

  • Length (L): Standard lengths or custom dimensions upon request

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Applications

  • Torque transmission between shafts and couplings

  • Shaft positioning in machine tools and power transmission systems

  • Axial stop and locking for pulleys and cams

  • Quick-assembly mechanical joints

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Customization & Notes

  • Custom drawing support, including length, tolerance, and chamfer angle

  • Recommended shaft-keyway fit: H7/h9

  • Small batch prototyping and fast lead times available

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