DBH 1155/85 radial shaft seal — 12 x 27.5 x 5.7/10.7

DBH 1155/85 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 1155/85 and any equivalents.

The DBH 1155/85 is a radial shaft seal that keeps lubricant in and contaminants out where a shaft turns inside a housing. Its dimensions are shaft 12 mm, housing 27.50 mm, and stepped height 5.70/10.70 mm. It presses into the housing and seals against the shaft with a flexible lip. This kind of seal is a wear item in gearboxes, pumps, electric motors, and power transmission equipment, where it helps prevent leaks and protect bearings and gears.

This radial shaft seal comes from DBH and is identified by part number 1155/85 and design A 372. The size is written as shaft diameter (d) 12 mm, housing diameter (D) 27.50 mm, and height (h) 5.70/10.70 mm. The two-part height means the outer profile is not the same along the whole seal: one section has a larger outer diameter lip and the other a smaller one. That stepped shape lets the seal sit correctly in housings with a shoulder or at different mounting depths. The sealing lip, usually an elastomer, is bonded to a metal ring that gives the part its stiffness.

Seals like this are found wherever a rotating shaft passes through a housing that holds lubricant. Common examples include gearboxes, centrifugal pumps, electric motors, compressors, machine tools, and belt or chain drives. They also appear in rollers and pulleys that turn on bearings and need to hold grease. In each case, the seal stops oil or grease from escaping and blocks dust, water, or particles from getting into the mechanism.

When installing a seal, inspect the shaft for burrs or wear and make sure the sealing surface is smooth. The housing bore should be clean and free of dents. Lubricate the lip before fitting it, and use a tube or socket of the right diameter to press it in squarely without distorting it. Choosing the correct seal depends on shaft speed, operating temperature, and the lubricant used. If the original part has a stepped height, it is best to keep that geometry so the seal seats properly.

If you need a replacement, send part number 1155/85 or the shaft, housing, and height dimensions by WhatsApp. With that information we can check our DBH seal and radial shaft seal line for a compatible option. We can also tell you whether the housing can take a single-height seal or whether the stepped design should be kept. MR Industrial Accessories supplies this brand and can advise based on the equipment where the seal will be used.