Timken MM311K Ball P4S Super Precision Bearing delivers ultra smooth, vibration-free performance for high-accuracy spindle applications, featuring a CR phenolic cage and superior static and dynamic radial ratings

TIMKEN MM311K Ball P4S Super Precision Bearing single unit
✔️ Single-row sealed bearing: OD 120 mm, ID 55 mm, width 29 mm

The TIMKEN MM311K Ball P4S is a high-precision, single-row ball bearing designed for exacting load and speed requirements in CNC machines, spindles, and automation systems.

✅ OD 120 mm (4.7244 in), ID 55 mm (2.1654 in), width 29 mm (1.1417 in)
✅ Static radial rating per row: 10000 lbf (44600 N)
✅ Dynamic radial rating per row: 17800 lbf (72100 N)
✅ Cage type CR - Phenolic inner land riding
✅ Precision ISO P4S (ABEC 7/9)
✅ Limiting speed: grease 12500 rpm; oil 25000 rpm
✅ Rows per set: Single

💡 What is a pillow block bearing used for in precision machinery? These bearings provide sturdy shaft support and alignment in rotating assemblies. - Handy for CNC machines, conveyors, and robotics needing precise shaft support - Improves stiffness, reduces wobble, and helps maintain low runout - Lubrication and preload management extend bearing life in automated systems