Needle Roller Cage KT81211C3 8 mm ID x 12 mm OD x 11 mm Width C3 Tolerance High Carbon Steel Precision Insert for Linear Slide Units Single Piece Bearing Insert Fits Sealed Housings

Needle roller cage KT81211C3, 8 mm x 12 mm x 11 mm
✔️ High carbon steel, C3 roller tolerance, single piece, KT series

This single needle roller cage is a compact bearing insert used in linear slide units, small gearboxes, and sealed bearing assemblies. It provides tight radial support where space is limited.

✅ Inner diameter: 8 mm; outer diameter: 12 mm; width: 11 mm
✅ Material: high carbon steel; C3 tolerance on roller diameter
✅ Dynamic load capacity 4630 N; static load capacity 4170 N; max speed 60,000 rpm
✅ Temperature range -20 to 120 °C; series KT; model KT81211C3
✅ Single piece pack; weight 0.010 lb; sold each
✅ Fits sealed ball bearing housings and linear slide units; can pair with ceramic rollers for specific applications

💡 What is a needle roller cage used for in linear slide units and sealed bearing assemblies? Needle roller cages hold multiple thin rollers to deliver high radial load capacity in confined spaces; they're handy when you need compact, low-profile bearing support. Here’s a short breakdown of typical benefits: - Provides high radial load support in compact linear slide units and sealed assemblies, improving load distribution and reducing wear. - Compatible with sealed ball bearing setups and can be paired with ceramic rollers for higher speed or lower friction needs. - Ideal for small gearboxes, actuator shafts, and precision linear guides where tight clearance and C3 tolerance maintain performance.