NTN 5S-2LA-BNS914LLB angular contact ball bearing

NTN 5S-2LA-BNS914LLB belongs to angular contact ball 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 5S-2LA-BNS914LLB and any equivalents.

For machine tool spindles, metrology equipment and positioning systems, the NTN BNS series angular contact ball bearing handles combined radial and axial loads in one direction. Its oblique raceways and ball set provide the angular contact that boosts axial capacity while maintaining rotational accuracy and rigidity. MR Industrial Accessories supplies this line to maintenance and purchasing teams across the United States and Latin America.

Reading a BNS part number is straightforward once you know the blocks. The 5S prefix means the bearing runs with ceramic (silicon nitride) balls, which lowers weight and supports high-speed operation. Next, 2LA identifies a low-friction seal on both sides. BNS then marks the precision angular contact series, and the number that follows — as in 5S-2LA-BNS009LLB or 5S-2LA-BNS016LLB — sets the size within that series. The LLB suffix specifies the seal type and factory lubrication. Every reference therefore encodes ball material, sealing and size.

These bearings appear in milling, grinding and machining center spindles, where dimensional accuracy is critical. They also serve metrology equipment, rotary tables, industrial robots and high-speed transmission systems. Because they take axial load in a single direction, they are often mounted in paired arrangements. Machining shops, automotive plants and machinery builders rely on this series for production components that demand precision and reliability.

When selecting a BNS bearing, consider the direction of axial load, rotational speed and the working environment. The 2LA seal keeps contaminants out and lubricant in, but a very aggressive setting may call for extra sealing. Internal clearance and preload are set at mounting; spindle applications typically use light preload to raise rigidity. Shaft and housing alignment between supports must be correct to avoid parasitic stresses. Grease or oil lubrication is chosen according to speed and operating temperature, and the manufacturer's mounting instructions should always be followed.

Precision angular contact bearings from other brands can replace NTN BNS when the main dimensions, contact angle, seal type and precision class align. Diameter and width alone are not sufficient: load capacity, clearance and tolerances must also be checked. If you have another brand's part number, we can help identify the NTN equivalent or a compatible alternative. Interchange between manufacturers is not automatic, and a technical review helps prevent premature failures. Share your application data and we will advise.