SKF QJ 309 MA/C3 angular contact ball bearing

SKF QJ 309 MA/C3 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 QJ 309 MA/C3 and any equivalents.

SKF QJ MA/C… bearings are four-point angular contact ball bearings. Their design lets them carry radial loads together with axial loads in either direction, which suits arrangements that need accurate axial location and a stiff shaft system, such as machine tool spindles, gearboxes and transmission equipment. MR Industrial Accessories LLC supplies this line within its catalog of SKF bearings.

Reading the code helps you order the right variant. QJ identifies a four-point bearing: two ball rows and an outer ring made in two parts. The number after it, for example 209, 210 or 212, is the size under the diameter and width system. MA means a machined brass cage located on the outer ring. The suffix after the slash gives internal radial clearance: C2 is tighter than standard, C3 is looser. So QJ 209 MA/C2 is a four-point bearing, size 209, brass cage and C2 clearance.

These bearings appear in metalworking, food, petrochemical and mining plants. Typical positions include milling machine and lathe spindles, gearboxes, centrifugal pumps and processing equipment. Because they take axial load in both directions, they fit applications where axial position must be held accurately and the assembly must stay rigid, such as rotary tables or machine tool shafts.

Selection comes down to the axial and radial load the bearing will see, the speed and the operating environment. Clearance is picked from the fit and the working temperature: C3 gives room for thermal expansion. Installation calls for correct alignment and proper lubrication, grease or oil as the application requires. The MA brass cage is strong and helps move heat away, but check that it suits the lubricant you plan to use.

Other makers may list four-point bearings with similar designations, yet codes do not match one to one. For a replacement, compare bore, outer diameter and width, load capacity and internal clearance. MR Industrial Accessories LLC can help you sort through the options among the brands it supplies.

The quickest route to a quote is to send the complete part number, for example QJ 209 MA/C2, by WhatsApp or email to MR Industrial Accessories LLC. We identify the exact product and reply promptly. If the cage or clearance suffix is unclear, we can also explain the designation and suggest equivalents.