This is a high-strength, thin bearing machined from 90MnCrV8 tool steel.
The compatible gear shaft is Φ4mm, the bearing hole size is 8mm, and there are 6 pieces in one package.
Compatible with RETRO ARMS CNC Gears PandoRA Φ4mm shaft series.
The surface is blackened to prevent rust.
The dimensions are thin, approximately 2 mm thick (flange thickness 0.5 mm).
It is almost flush with the gearbox so there is no interference with the frame.
Selector plates other than those compatible with 8mm and 9mm bearings can also be used.
This bearing is very hard, with a hardness of HRC58-60.
Always use an extreme pressure lubricant that provides good metal-to-metal lubrication.
(Teflon and silicone lubricants are not recommended.)
![[RETRO ARMS] CNC Low Profile Bushing 8mm / 4mm](http://rock-et.jp/cdn/shop/files/RETRO-7405_1024x1024.jpg?v=1750652511)
