NSK 42SF68 needle roller bearing

NSK 42SF68 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 42SF68 and any equivalents.

When radial space is tight and radial loads are high, the NSK SF series needle roller bearing is a practical choice. It is a radial needle roller bearing without an inner ring, so it mounts directly on a hardened and ground shaft. This simplifies the assembly design and reduces its weight. Typical uses include transmissions, pumps, compressors and other industrial machinery where capacity relative to size matters.

The SF series part number indicates both shaft diameter and bearing width. The first number is the shaft diameter in millimeters, followed by SF, then a second number for width. For example: 5SF8 for a 5 mm shaft and 8 mm width; 6SF10 for a 6 mm shaft and 10 mm width; 7SF12 for a 7 mm shaft and 12 mm width; 8SF14 for an 8 mm shaft and 14 mm width; 10SF16 for a 10 mm shaft and 16 mm width; 12SF20 for a 12 mm shaft and 20 mm width; 13SF22 for a 13 mm shaft and 22 mm width; 15SF24 for a 15 mm shaft and 24 mm width. This naming system lets you identify the shaft size and bearing width at a glance.

Because the bearing has no inner ring, the shaft itself serves as the inner raceway. The shaft must be hardened and ground to the appropriate specifications. This design saves radial space and allows a higher load capacity than a ball bearing of similar dimensions.

In maintenance and repair work, the SF series is often found in gearboxes, hydraulic pumps and small compressors. When replacing, confirm the shaft diameter and width from the part number, and check that the shaft surface is in good condition. If the shaft is worn, the bearing may not perform as intended.

To request a quote, send the part number via WhatsApp or email. The team can also suggest equivalent options and help you choose the right size for your application. Customers in the United States and several Latin American countries rely on MR for these bearings.