top of page
符合JIS規範的同心扣環ISTW

ISTW Retaining Ring (IS Type｜JIS B 2804)

The ISTW retaining ring is a flat, space-saving component manufactured according to JIS B 2804. Designed for shallow grooves on shafts, it provides axial retention for internal components. Once installed, it sits nearly flush with the shaft surface, making it ideal for compact assemblies or precision equipment where protrusions are not allowed.

Product Features

  • Standard: Complies with JIS B 2804; DIN 471 alternatives available

  • Installation: Designed for shallow grooves on shafts for axial positioning

  • Precision Fit: Flush with the shaft surface after installation, ideal for tight spaces

  • Material Options:
     ・S50C (Carbon Steel) – Black oxide finish for basic rust protection
     ・SUS304 (Stainless Steel) – Suitable for high-corrosion environments

  • Size Range: For shaft diameters from Φ6mm to Φ100mm (custom sizes available)

​

Applications

  • Axial retention for miniature bearings and washers

  • Positioning for precision linear guides

  • Anti-thrust component in compact motors

  • Internal retention in electronic devices

​

Customization & Notes

  • Supports small quantity orders

  • Custom sizes, specs, and part code confirmation available

​

bottom of page