SKF 7028 CD/P4A angular contact ball bearing

SKF 7028 CD/P4A 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 7028 CD/P4A and any equivalents.

The SKF CD/P4A line covers precision angular contact bearings built to carry radial and axial loads at the same time, in setups where rotational speed and running accuracy matter. Machine tool spindles, measuring instruments and positioning systems are typical homes for these bearings, and their angled raceway geometry lets them be arranged in pairs or sets when the assembly calls for extra rigidity.

Reading the code helps when you are picking a bearing for a spindle or a rebuild. The leading digits give the bore size within a diameter series, CD marks the angular contact layout with a 15° contact angle and a cage that is polyamide or brass depending on size, and /P4A is the precision class, meaning tight dimensional and running tolerances. So 7000 CD/P4A and 7005 CD/P4A follow the same pattern and differ only in their main dimensions.

Where do these bearings end up? Milling, grinding and machining center spindles are the classic case, since speed and accuracy decide the result. They also appear in precision drill heads, rotary tables, metrology equipment and robot drive systems. Automotive, aerospace, machine tool and medical equipment operations are the sectors that lean on this series most, because they need accuracy to hold up under demanding conditions.

Selection comes down to the axial and radial load the bearing has to take, the speed of rotation and the rigidity the system requires. Mounting needs precise alignment and the right preload, which can come from springs or from tandem-mounted pairs. Grease or oil lubrication is chosen according to speed and operating temperature. Seals or shields keep contamination out, though at high speeds an open bearing with oil lubrication is often the preferred route.

On interchangeability: precision angular contact bearings are made to international standards, so brands can be swapped as long as dimensions and precision class match. A CD/P4A bearing can give way to another with a similar designation and tolerance from a different maker, but check the contact angle, the cage and the internal clearance before you commit.

For an SKF angular contact bearing in the CD/P4A series, send the complete part number to MR by WhatsApp or email. The team can point you toward equivalents and help you confirm the right choice for the application.