NACHI NUPK2205S1NRC3 NUP Cylindrical Roller Bearing 100x180x34 mm, tapered bore, C3

The NACHI NUPK2205S1NRC3 is a single row cylindrical roller bearing in NUP configuration: two flanges on the outer ring, and one flange plus a loose flange ring on the inner ring. The size recorded for this item is 100 x 180 x 34 mm (bore x outer diameter x width). The K in the number marks a tapered bore (1:12 taper). The NR in the number marks a snap ring groove with snap ring on the outer ring. C3 is the radial internal clearance group, larger than Normal.

The inner ring, loose flange ring and roller set can be separated from the outer ring. It takes axial load in both directions. Load ratings, limiting speeds and mass are not stated on this page because they have not been verified for this exact designation. Please ask AIMS to confirm the specification before you order.

Where this product is used

• Electric motors and generators
• Gearboxes and industrial transmissions
• Pumps, fans and compressors
• Machine tools and general industrial machinery
• Conveyor drives and other heavy rotating equipment

Features

• NUP configuration, with two flanges on the outer ring, and one flange plus a loose flange ring on the inner ring. The inner ring, loose flange ring and roller set can be separated from the outer ring.
• Takes axial load in both directions. Axial load is carried by sliding contact between roller ends and flanges, so the allowable axial load is limited
• Tapered bore (K), 1:12 taper
• Snap ring groove with snap ring on the outer ring (NR)
• C3 radial internal clearance, larger than Normal

Key specifications

Selecting the right option

The NUP configuration has two flanges on the outer ring, and the inner ring has one flange plus a loose flange ring. It takes radial load plus axial load in both directions. Axial load is carried by sliding contact between roller ends and flanges, so the allowable axial load is limited: for heavy or continuous axial load, send AIMS the application details first.

A tapered bore (K, 1:12) is mounted on a tapered shaft seat or adapter sleeve, so check the shaft seat before ordering.

The 2205 in this part number would normally mean a 25 x 52 x 18 mm bearing in the NACHI range, which does not match the 100 x 180 x 34 mm recorded for this item. Please confirm the size and designation with AIMS, against your existing bearing or drawing, before ordering.

Fitting and use

Check the load and speed against the catalogue figures before ordering and apply a suitable safety factor. Cylindrical roller bearings are mainly for radial load: any axial load must be well within what the flanges can carry by sliding contact, and the limit depends on lubrication and speed as well as the bearing.

Where axial load is applied, keep enough radial load on the bearing, supply plenty of lubricant between the roller ends and flanges, use a lubricant with good film strength, mount the bearing accurately, allow a running-in period and keep the radial clearance small.

These bearings are open: the housing arrangement has to supply and hold the lubricant and keep contamination out. Fit the rings with the housing and shaft tolerances recommended for your application, and keep the shaft and housing seats clean and square.

If you are replacing a bearing, check the full number stamped on it, including any letters after the digits, and send AIMS the number or the dimensions if you are not sure.

Related products

Other configurations: NACHI NU C3 cylindrical roller bearings (15 sizes), NACHI NJ C3 cylindrical roller bearings (12 sizes) and NACHI N C3 cylindrical roller bearings (8 sizes). For combined radial and axial loads on one bearing, see the NACHI tapered roller bearings (metric series).