61903RS Sealed Bearing 17x30x7 Ball Bearings

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Price: $11.77 $7.77   

Product Feature

• Deep groove geometry for high speeds and supporting both radial and axial loads
• Chrome steel for durability and resistance to deformity under heavy loads
• Rubber seals on both sides of the bearing to keep lubricant in and contaminants out
• Lubricated at manufacturer for no additional lubrication required
• Chrome steel cage evenly spaces the balls for even load distribution and prevents contact to reduce friction, vibrations, and noise

Product Description

This 61903RS 17x30x7-millimeter sealed ball bearing has deep groove geometry for high speeds and supporting both radial and axial loads. The bearing is made of chrome steel for durability and resistance to deformity under heavy loads, and it has rubber seals on both sides of the bearing to keep lubricant in and contaminants out. It comes pre-lubricated from the manufacturer so no additional lubrication is required. A chrome steel cage evenly spaces the balls for even load distribution and prevents contact to reduce friction, vibrations, and noise. This deep-groove sealed ball bearing is suitable for use in applications that involve combined radial and axial loads and a need for high running accuracy at high rotational speeds. Such applications include clutches, drives, gearboxes, compressors, pumps, turbines, and printing and textile machines, among others.

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 bearings are lubricated with oil or grease in the bearing factory, while open and shielded 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, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others.

61903RS Sealed Bearing 17x30x7 Ball Bearings Review

I had these bearings on a bicycle hub when one of them went bad. Decided to get new bearings and found these $5 cheaper than anywhere else. Their nice replacements, nothing special the exact same thing but at least I know where to get them. Also, they don't have a blue dustcover...its black which is no big deal at all. Probably made in China but at least their steel cages with steel balls. They also come pre lubricated:)

Packaging was great too, although they came in 2 seperate packages???

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