DBH 1378 radial shaft seal — 28 x 38 x 10/15

DBH 1378 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 1378 and any equivalents.

When a gearbox, pump or motor starts weeping oil around the shaft, the seal is usually the first suspect. The DBH 1378 is a single-lip radial shaft seal built for a 28 mm shaft running in a 38 mm bore, with a height range of 10.00/15.00 mm. Its A 135 designation identifies a spring-loaded single lip, the standard arrangement for rotating shafts that need lubricant kept in and contaminants kept out. MR Industrial Accessories supplies this brand and can help you confirm the right seal for the equipment on your bench.

Reading the code is straightforward once you know the layout. The 1378 is the designation, and the size string follows the usual order: d for the shaft at 28 mm, D for the housing bore at 38 mm, and h for the height at 10.00/15.00 mm. That variable height is the detail worth noting. Because the seal covers a range rather than a single figure, it can sit at different depths inside the housing, so it fits bore configurations that a fixed-height seal would not. Shaft and bore dimensions still have to match exactly.

You will find this seal in gearboxes, centrifugal pumps, electric motors, conveyor rollers and other transmission equipment. In every one of those spots it does the same job: hold oil or grease on the bearing side and block dust, water and particles from getting in. The 28x38 mm envelope suits low and medium power machinery, where space around the shaft is tight. Before ordering, check the shaft and bore for wear, scoring or corrosion. A grooved shaft will not seal properly no matter how good the replacement is.

Installation rewards a little patience. Confirm the shaft meets the required hardness and surface roughness, and make sure the housing is clean with no burrs or sharp edges left from previous removal. Coat the lip with the same oil or grease the equipment runs on, then press the seal in squarely. Use the 10/15 mm height to set it at the depth your housing allows. If the shaft itself is damaged, a wear sleeve is an option worth considering. Speed, operating temperature and lubricant type all affect selection, so factor them in before you commit.

If you are cross-referencing, send the code 1378 or simply the shaft and bore measurements. From there we can look at alternatives in other brands or configurations, including double-lip versions and special materials, when the application calls for something different. MR Industrial Accessories works with both supplied brands and in-house manufacturing, and our team can point you to the correct component. The quickest route is a message with your part number or dimensions.