NTN BK0509 needle roller bearing

NTN BK0509 belongs to needle roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for BK0509 and any equivalents.

For equipment that must carry significant radial load in a limited envelope, the NTN BK series needle roller bearing is a single-row, open design with a steel cage and no inner ring. It appears in machine tools, transmissions and other industrial drives, and MR Industrial Accessories LLC supplies it to customers in the United States and Latin America.

Reading the code is straightforward. BK identifies a needle roller bearing with a steel cage, single row, without inner ring. The digits that follow give the size: the first pair is the bore in millimeters, the second pair is the total width.

Because there is no inner ring, the shaft itself acts as the raceway. That keeps the assembly compact, but it also means the shaft must be hardened and ground to the correct hardness and roughness. Typical installations include machine tools, power transmission equipment, pumps, compressors and lifting systems, as well as automotive, metallurgical, food and packaging operations where radial load is high and space is tight.

When selecting a bearing, review the radial load, the rotational speed and the operating environment. Confirm the shaft condition before mounting, and use suitable tools so the needles and cage are not damaged. Lubrication may be grease or oil depending on the application, and a proper lubricant film must be maintained. Shaft-to-housing alignment is critical for smooth running and long service life.

Interchangeability is possible with bearings from other makers that carry the same designation and dimensions, but tolerances and cage type can differ. For a safe match, provide the complete code of the original part and let a specialist confirm the alternative.

To request a quote, send the exact code from your equipment or drawing by WhatsApp or email. The team replies promptly and can suggest equivalents or help you choose the right bearing.