NTN 7021UAD angular contact ball bearing

NTN 7021UAD 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 7021UAD and any equivalents.

For machine tool spindles, positioning systems and metrology equipment, NTN 79 UAD series angular contact ball bearings provide the rigidity and rotational accuracy these applications demand. Their raceways are inclined so the bearing can take radial and axial loads acting in a single direction. MR Industrial Accessories supplies this series to maintenance and purchasing teams throughout the United States and in several Latin American countries.

The 79 UAD code can be read in three parts. The 79 identifies a thin-section dimension series with a reduced outside diameter. The digits that follow indicate bore size: 00 for 10 mm, 01 for 12 mm, 02 for 15 mm, and so on, as seen in 7000UAD, 7001UAD, 7002UAD, 7003UAD, 7004UAD, 7005UAD, 7006UAD and 7007UAD. UAD is an NTN suffix that denotes a particular angular contact configuration, with a defined contact angle and a cage made of a special material.

Typical installations include grinding machine spindles, milling heads, precision instruments, testing laboratory equipment and positioning mechanisms. Because each bearing accepts axial load in one direction only, two are often mounted together to handle forces in both directions. When you need exact dimensions for a specific size, send us the complete code and we will quote it.

Selection depends on the direction of the axial load, the internal clearance required and the sealing arrangement. These bearings are generally mounted with an interference fit on both shaft and housing, and alignment must be precise to avoid parasitic stresses. Use a grease or oil suited to the speed of the application, and set axial clearance during mounting. In paired arrangements, follow the manufacturer's instructions.

The boundary dimensions of the 79 series follow international standards, but suffixes and internal tolerances can differ between manufacturers, so a code from another brand is not always a direct replacement. If you have a competitor's reference, we can help you locate the equivalent NTN bearing. Always check clearance and tolerances before substituting one bearing for another.

To request a quote, send the full code or your application dimensions by WhatsApp or email. Our team replies promptly and can also advise on lubrication, mounting and maintenance to help you get the most from each bearing.