MM309K Timken Fafnir Ball Bearing P4S Super Precision High Speed 0.9843 Inch C0 Static Radial Rating 31700 N Dynamic Radial Rating 13200 Lbf Cage Type Phenolic Inner Land Riding

MM309K TIMKEN FAFNIR P4S Ball Bearing, 0.9843 in
✔️ Single bearing: width 0.9843 in, OD 3.937 in, ID 1.7717 in

The MM309K TIMKEN FAFNIR ball bearing is a high-speed, precision unit designed for CNC spindles, robotics, and other demanding machinery. It features ISO P4S precision, a CR - Phenolic Inner Land Riding cage, and robust static and dynamic radial ratings to support tight tolerances in challenging environments.

✅ Static radial rating: 7120 lbf (31,700 N) per row
✅ Dynamic radial rating: 13200 lbf (58,600 N)
✅ Ball diameter: 0.6875 in (17.46 mm)
✅ Width: 0.9843 in (25.0 mm)
✅ Inner diameter: 1.7717 in (45.0 mm)
✅ Outer diameter: 3.9370 in (100.0 mm)
✅ Limiting speed (grease): 15200 rpm; (oil): 30400 rpm
✅ Cage type: CR - Phenolic Inner Land Riding
✅ Precision class: ISO P4S (ABEC 7/9)

💡 What is a handy high-precision sealed ball bearing used for in precision manufacturing equipment?

Used in a variety of high-precision applications to deliver smooth motion and long life.

- CNC spindles and precision robotics for repeatable motion - Sealed lubrication protects against dust in harsh factory environments - High-speed operation with tight tolerance and long service life