FAG NNU4934-S-K-M-SP super precision bearing

FAG NNU4934-S-K-M-SP belongs to super precision 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 NNU4934-S-K-M-SP and any equivalents.

The FAG NNU-S-K-M-SP line covers super precision cylindrical roller bearings built for setups where rigidity and running accuracy drive the result. Machine tool spindles, rotary tables and measuring equipment are typical homes for these bearings. MR Industrial Accessories supplies the series and helps buyers match the right version to the job.

Reading the designation helps when you compare part numbers. NNU points to a double-row cylindrical roller bearing with ribs on the inner ring. The S marks a special super precision version, while K means a tapered bore that mounts with an adjustable interference fit. M stands for the machined brass cage, and SP is the super precision accuracy class. Numbers such as NNU4920-S-K-M-SP and NNU4926-S-K-M-SP show how the blocks combine.

Typical installations include spindles on milling machines, grinding machines and machining centers, plus rotary tables on coordinate measuring machines, precision boring heads and dynamic testing equipment. Shops running tight surface finish requirements are the usual users.

Selection starts with the combined load, the top speed the spindle will see and the rigidity the application demands. A tapered bore calls for care during mounting: check internal clearance once the bearing is adjusted, and use a precision lock nut. Grease or oil both work as lubrication, depending on the thermal conditions. Supports must be aligned, since misalignment shortens service life. Where contaminants are present, evaluate extra sealing protection.

Super precision bearings from other makers can come close on paper, yet dimensions and tolerances do not always swap directly. Compare accuracy class, cage style and internal design before substituting one brand for another. The rigidity and load behavior of the NNU-S-K-M-SP series should be confirmed with the manufacturer or a specialist.

For a quote, send the full part number by WhatsApp or email to MR Industrial Accessories. With the exact model, the team can point you to the right version for your equipment and suggest equivalents where they apply.