Product Description
S684 Radial Stainless Steel Miniature Ball Bearing Both Sides Open
Usage: Align Helicopter, Trex700, Jewelry, Hand Piece, Hobby, RC Helicopters, RC Planes, RC Trucks, RC Cars, Beam Ball Bearing
Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. All rolling bearings are open, shielded, or sealed. Sealed and Shielded bearings are lubricated with oil or grease in the bearing factory, while open bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use. The shield protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan. Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, electric motors, CNC machinery, trucks, mining equipment, train, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others.
Match #: SMR684, DDL-940, SSL940
Product Videos
Custom Field
Inner Diameter 4mm
Outer Diameter 9mm
Width 2.5mm
Material Stainless Steel
Lubrication Chevron SRI-2 Grease
Interchange Numbers SMR684, DDL-940, SSL940
Static Load 51 lbs
Dynamic Load 143 lbs
Grease RPM Limit 53,000 RPM
Oil RPM Limit 63,000 RPM
