NACHI 6308NRC3 Open Deep Groove Ball Bearing 40x90x23 mm, C3, snap ring

This NACHI range covers 10 single row deep groove ball bearings, open with a snap ring groove and snap ring fitted, all with C3 radial internal clearance, from 25 to 45 mm bore (outer diameters 52 to 100 mm, widths 15 to 25 mm). Select the size from the drop-down: each size has its own bearing number, load ratings and limiting speed in the Model Details.

Deep groove bearings are the most widely used ball bearing type. They carry radial, axial and combined loads, run at high speed with high running accuracy, and need no adjustment.

Where this product is used

• Electric motors and generators
• Pumps, fans and blowers
• Gearboxes and industrial transmissions
• Conveyor rollers, idlers and pulleys
• Power tools, appliances and general industrial machinery

Features

• Open design with no seals or shields: lowest friction, oil or grease lubrication, and the oil limiting speed applies
• Carries radial, axial and combined loads, with high running accuracy and high speed capability
• Snap ring groove with snap ring fitted in the outer ring (NR), which simplifies housing design and mounting
• C3 radial internal clearance, larger than Normal: 13 to 28 µm on a 25 mm bore up to 18 to 36 µm on a 45 mm bore
• Load ratings, limiting speeds and mass for every size are taken from the manufacturer’s catalogue; boundary dimensions follow the ISO/JIS standard plan

Key specifications

Available sizes

Selecting the right option

Open bearings suit housings that provide their own sealing and lubrication, and are the only type with an oil lubrication speed. For clean, well-protected housings they give the lowest friction.

Choose C3 where the bearing will run with an interference fit or a temperature difference between the rings, which both take up clearance; keep Normal clearance for light fits and low temperature rise. The Model Details give the exact micrometre range for each size.

Fitting and use

Check the load and speed against the catalogue figures in the table before ordering, and apply a suitable safety factor. These bearings must always carry a minimum radial load so the balls roll rather than slide, and heavy axial loads should be checked with AIMS before ordering.

Press the ring that is being fitted, not the other ring or the balls: force goes through the side face of the inner ring on a shaft and the outer ring in a housing.

Related products

The same NACHI deep groove range is also available with other closures: NACHI open C3 deep groove ball bearings (28 sizes), NACHI double shielded C3 deep groove ball bearings (1 size) and NACHI double contact sealed C3 deep groove ball bearings (3 sizes).