693UG Miniature Ball Bearing 3x8x4 Open R830

Bearing Type: 693UG Miniature Ball Bearing

Size: Inner Diameter 3mm x Outer Diameter 8mm x Width 4mm 

Closure Type: Open on both sides

Material: Chrome Steel SAE-52100

Grease: Light Oil

Load Capacity: 18 (Static) - 57 (Dynamic)

Speed Limit: 60000 RPM – 67000 RPM 

Interchange Numbers: R830, L-830, MR693UG, 693UG

Used in : Robotic, Medical Equipment, Electric Motor, Fans, Fishing Reel, RC Engine, 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.