DBH 5317Pol radial shaft seal — 30 x 42 x 8

DBH 5317Pol 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 5317Pol and any equivalents.

The DBH 5317Pol is a radial lip seal sized for a 30 mm shaft, a 42 mm housing bore and an 8 mm width. Its job is to hold lubricant in place where a rotating shaft passes through a housing while keeping dust and moisture out of the assembly. The Lx designation describes the lip and case arrangement, which is set up to retain lubricant in one direction of rotation. MR Industrial Accessories supplies this seal as part of its seal and oil seal range.

Ordering information is built into the code. The 5317 series covers seals of compact cross section, while the Pol suffix points to the specific compound and lip geometry used for this size. The three figures that matter when replacing it are shaft 30 mm, housing 42 mm and width 8 mm. Confirm all three against the old part before ordering, since a seal that matches on two dimensions but not the third will not seat correctly.

Seals in this size range turn up on input and output shafts of gear reducers, centrifugal pumps, electric motors, fans and transmission equipment. The purpose is the same in each case: keep oil or grease where it belongs and stop contaminants from reaching bearings and gears. The same dimensions are also used as a secondary closure on split plummer block housings and gear units.

Installation quality decides how long the seal lasts. Check the shaft for burrs, scoring or deep wear marks across the lip contact band, and make sure the housing bore is clean and round. Apply lubricant to the lip before fitting, then press the seal in with a tube or driver that bears on the outer diameter rather than the lip. Where the surrounding environment is dirty, a version with an additional dust lip is worth considering. Lubricant type, operating temperature and shaft surface speed all influence which variant fits best.

If you need a substitute, send the 5317Pol code or the 30 x 42 x 8 mm dimensions along with a short note on the application. Options include the same size from another brand, a double-lip version or a seal with a spring. It is also worth inspecting the shaft itself: a worn contact area can sometimes be handled with a taller seal or a repair sleeve.

MR Industrial Accessories supplies the DBH brand within its seal and oil seal line. Send the code through WhatsApp or email and the team will confirm the right option for your installation, including equivalents where needed.