DBH 9766/85 radial shaft seal — 20 x 40.4 x 6

DBH 9766/85 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 9766/85 and any equivalents.

When a rotating shaft needs its lubricant kept in and outside contamination kept out, the DBH 9766/85 radial shaft seal is one of the options MR Industrial Accessories supplies. It carries the 9766/85 designation and the A 120 design, sized for a 20 mm shaft, a 40.40 mm housing bore and a 6.00 mm height, which suits assemblies with limited axial room.

Reading the reference is straightforward: 9766/85 identifies the seal, and A 120 describes a single sealing lip with a spring, built for shafts that turn under permanent lubrication. The three figures to check before ordering are shaft 20 mm, housing 40.40 mm and height 6.00 mm. DBH produces the seal to standard tolerances for general industrial duty.

Typical installation points include gearboxes, pumps, electric motors, compressors and other power transmission equipment, where the seal holds lubricant in place and shields bearings from dirt. Machine tools, conveyors and low-pressure hydraulic systems also use this size, as do fan, mixer and agitator shafts running in conditions with moderate dust or moisture.

Correct fit matters more than anything else. The shaft surface should be hard enough and free of burrs or scratches across the contact band, and the bore must be clean and measure exactly 40.40 mm so the outer ring is not distorted. Apply lubricant to the lip before fitting, and drive the seal in with a tool that bears on the outer ring rather than the lip. Where the shaft is already worn, an auxiliary lip version or a wear sleeve is worth considering.

If you are cross-referencing, send the code 9766/85 or simply the shaft, housing and height measurements. Our team can search the DBH oil seal range and the other brands we supply for a match, and can point you to the lip design that fits your lubricant type and rotation speed.

For a quote, message the code 9766/85 to MR Industrial Accessories on WhatsApp or by email. Tell us how the seal is used and we will come back with the alternatives that suit the equipment, helping you avoid a repeat failure.