DBH 5210 radial shaft seal — 42 x 56 x 8

DBH 5210 belongs to radial shaft seal, part of our Seals range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 5210 and any equivalents.

When a shaft seal starts weeping, the fastest way to get the right replacement is to work from the code and the three key dimensions. The DBH 5210 is a radial oil seal built for a 42 mm shaft, a 56 mm housing bore and an 8.00 mm height, in the A 335 configuration. That configuration is a single lip with a spring, which is the common choice for rotating shafts that run with oil or grease.

Reading the designation is straightforward: 42 mm is the shaft diameter the lip rides on, 56 mm is the bore it presses into, and 8.00 mm is the width across the outside. The A 335 design adds a garter spring behind the lip, so the sealing edge stays in contact with the shaft as it turns. Keeping those three numbers straight is what separates a seal that seats correctly from one that leaks or spins in the housing.

You will find this size in electric motors, centrifugal pumps, speed reducers, gear cases and conveyor rollers, wherever lubricant has to stay in and dust or moisture has to stay out. Agricultural and industrial equipment working in dirty or damp conditions is another typical home for it, since the lip keeps grit away from the bearing and holds the oil where it belongs.

Before fitting a new seal, look at the shaft for burrs, grooves or a worn track, and check that the housing bore is clean and free of dents. A light film of lubricant on the lip helps it slide into place, and a proper installation tool keeps the lip from rolling or tearing. Speed, temperature and the fluid being sealed all affect how long the seal lasts; if the shaft is already worn, an auxiliary lip is one option worth discussing.

If you do not have the original seal in hand, send the DBH 5210 code or simply the three dimensions and we can cross it to another brand or a similar configuration. We confirm the technical details before quoting, so you are not guessing at the counter.

Send the code or dimensions on WhatsApp or by email and our team will get back to you with a quote and, where useful, alternatives that fit the same bore and shaft.