Hella Tough Carbon Steel Idler Sprocket 17 Tooth 9mm ID Built For ISO 04C Chains With Smooth Single Bearing And Heavy Duty Black Oxide Coating For Top Shelf Performance

Heavy duty carbon steel sprocket for reliable chain motion
✔️ 17 Tooth / 9mm Bore / C45 Steel / ISO 04C Compatibility

This rugged idler roller guides precision roller chains through fixed shafts on milling machines, drill presses, or factory conveyors. The tempered hard teeth bite down securely while the built in sealed ball bearing shuts out dust and debris. Packed as a single unit for quick bench swaps.

✅ C45 carbon steel housing fights corrosion thanks to matte black oxide plating
✅ Straight cut profile matches ISO 04C pitch spacing for zero slippage
✅ Pre mounted sealed bearing slashes friction loss and boosts uptime
✅ Designed for stationary axle mounting on standard shop equipment

💡 Why Swap In Sealed Hardened Steel Idlers Over Standard Soft Castings? Rolling in temper forged steel delivers serious torque handling for busy fabrication shops. Here is why experienced technicians push hard on this exact swap: - Heavy gauge c45 alloy absorbs sudden load spikes without tooth bending - Surface quenching locks crystal hardness for longer chain link contact life - Oiled base layer sheds coolant spray and blocks humidity from attacking raw metal Handy upgrades keep your main line running smooth without constant adjustments.