Timken
Timken 303K radial bearing, open, 17 mm bore
Single-row open radial bearing with a 17 mm bore, 47 mm outside diameter and 14 mm width, rated for 3,450 lb dynamic and 1,460 lb static load at up to 7,813 RPM
- Open design simplifies lubrication and inspection
- 17 mm bore fits standard shaft sizes
- 47 mm outside diameter matches common housings
- Dynamic load rating 3 450 lb handles radial forces
- Operating range −60 °F to 200 °F suits varied environments
Precision radial bearing for light machinery
The Timken 303K is a single-row open ball bearing with a 17 mm bore and 47 mm outside diameter. It suits electric motors, conveyors and general power-transmission equipment where moderate radial loads are present. Steel cage and Quaker Ferrocote finish provide consistent operation across the stated temperature span.
Verify shaft fit and lubrication plan
Confirm the shaft diameter matches the 17 mm bore for the intended interference or clearance fit. The open design requires external lubrication — grease or oil — and sealing to exclude contamination. Operating temperature must stay between -60 °F and 200 °F; speeds above 813 RPM or loads beyond the rated capacity will reduce service life.
Mounts in standard 303K housing seats
The 14 mm width fits industry-standard 303K pillow blocks and flanged units without modification. Open construction simplifies relubrication intervals and visual inspection during maintenance. Dynamic capacity of 3,450 lb and static capacity of 1,460 lb cover typical light-duty radial applications, leaving axial location to separate thrust components.
Highlights
- Open design simplifies lubrication and inspection
- 17 mm bore fits standard shaft sizes
- 47 mm outside diameter matches common housings
- Dynamic load rating 3 450 lb handles radial forces
- Operating range −60 °F to 200 °F suits varied environments
Specifications
No published specifications for this item yet.
Questions about this item
Does the Timken 303K open bearing include seals or lubricant in the box?
The bearing ships as a single open unit with no seals, shields or pre-applied lubricant; you must supply grease or oil and any retaining hardware separately.
When should I choose the 303K over other 17 mm bore bearings?
Choose the 303K when you need a 47 mm outside diameter, 14 mm width, 3,450 lb dynamic capacity and 7,813 RPM limit in an open steel cage design.
What does the 3,450 lb dynamic load rating mean once the bearing is installed?
It indicates the constant radial load the 303K can theoretically endure for one million revolutions at the rated speed before fatigue occurs.
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