3-1/2 in Heavy Duty Wide Inner Ring Set-Screw Bearing Insert UC318-56, Sealed Ball Bearing with Spherical O.D., Contact Seal and Slinger, Relubrication Port, Set-Screw Locking, 32200 lbf Dynamic, for Pillow Block Housings and Linear Slide Units

Single 3-1/2 in heavy-duty wide inner ring bearing
✔️ ID 3-1/2 in, wide inner ring, set-screw lock, sealed ball bearing

This single sealed ball bearing insert (model UC318-56) is a heavy-duty unit for mounted shafts, pillow block housings and linear slide units. It’s used in conveyors, industrial equipment and general machinery.

✅ Model: UC318-56
✅ ID: 3-1/2 in inner diameter
✅ Inner ring: Wide
✅ Insert type/material: Ball bearing, bearing steel
✅ Locking: Set-screw
✅ O.D. style: Spherical O.D.; Seal: Contact seal with slinger
✅ Relubrication: Yes (relube port)
✅ Dynamic load rating: 32,200 lbf; Static: 24,000 lbf
✅ Max temp: 212°F; HTS: 8483.20.40.40
✅ Typical use: Pillow blocks, conveyors, linear slide units

💡 What is a sealed ball bearing insert used for in pillow block housings and linear slide units? Sealed ball bearing inserts give compact shaft support and keep grease in while keeping dirt out. - Ideal for supporting radial loads in mounted systems like pillow block housings and linear slide units, improving runout control and shaft stability. - Sealed designs and relubrication ports extend service life in dusty or wet industrial environments; choose sealed ball bearing inserts for lower maintenance. - Set-screw locking and wide inner rings help prevent shaft slippage and reduce misalignment in conveyor and general machinery applications.