DBH 9778 radial shaft seal — 59 x 75 x 9/11.5

DBH 9778 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 9778 and any equivalents.

The DBH 9778 is a radial shaft seal built to design A 103. It fits a 59 mm shaft in a 75 mm housing bore, with a height of 9.00/11.50 mm. Its job is to hold lubricant in and keep dust, water and particles out, which is what protects bearings and bushings from premature wear. You will find it in rotating equipment where a shaft turns inside a stationary housing. MR Industrial Accessories supplies it as part of its seals and oil seals range.

Reading the code helps with selection. The 9778 designation identifies the seal, and design A 103 describes a single-lip seal with a metal case for rotating shafts under permanent lubrication. The dimensions follow the usual order: shaft 59 mm, housing 75 mm, height 9.00/11.50 mm. That dual height tells you the lip can sit in more than one position or that the profile is stepped, so check it against the cavity before installation.

Typical applications include gearboxes, pumps, electric motors, conveyor rollers and power transmission equipment. The same seal appears in agricultural machinery, compressors and pumping systems, wherever an oil or grease side has to stay separated from a side exposed to dirt or moisture. In each case it keeps the bearings protected and stops leaks that contaminate the equipment and force lubricant top-ups.

Before mounting, confirm three points: shaft and housing diameters match the published values, the height fits the cavity depth, and the lip material suits the fluid and operating temperature. Install with a clean, burr-free shaft, lubricate the lip, and use a tube or support bushing to avoid damaging it. If the shaft is worn, consider a seal with the lip in a shifted position or a repair sleeve.

For an equivalent, send part number 9778 along with the current shaft, housing and height measurements. With that data we can search the same family or suggest a seal with close dimensions that fits your housing, and advise on lip type and material for your fluid and temperature.

To request a quote for the DBH 9778, contact us on WhatsApp or by email with the part number or the dimensions. MR Industrial Accessories handles seals and oil seals for replacement work alongside housings, bearings and power transmission components. If the seal comes with a bearing or bushing, we can quote the complete assembly and help you define the fit.