DBH 8550Pol radial shaft seal — 52 x 72 x 9

DBH 8550Pol 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 8550Pol and any equivalents.

The DBH 8550Pol is a radial shaft seal from the DBH line, sized for a 52 mm shaft, a 72 mm housing bore and a 9 mm width. It keeps lubricant in and keeps dust, water and other contaminants out of rotating equipment. Because it is a wear part, it is normally replaced when oil starts weeping past the shaft or when the shaft shows play.

The code breaks down simply: 8550Pol identifies the seal, and the three figures that follow are shaft diameter, housing diameter and width. This one runs 52 mm on the shaft (d), 72 mm in the housing (D) and 9.00 mm wide (h). The Lx-R-H designation describes a lip with a reinforced body and a secondary exclusion lip. The elastomer works together with an internal spring to hold the sealing edge against the shaft while it turns. The seal arrives at the dimensions listed, so it presses straight into the bore without shimming or machining.

You will find this size in gearboxes, pumps, electric motors, transmission shafts and process equipment. Plants in food processing, chemicals and water treatment use it where liquid and particle entry has to be controlled, and it also shows up in reducers and rollers on road machinery. Its small cross-section suits tight housings where a dependable, quickly replaced closure is what matters.

Selection comes down to matching the bore and the shaft. Measure both, confirm the 9 mm width fits the space you have, and check that the shaft surface is smooth with no grooves and that the housing is clean and free of burrs. Lubricate the lip with the same oil the equipment runs before you press it in, and use an installation tool so the spring is not distorted. Misalignment or a scored shaft will cause leaks early.

If you need a cross-reference, send the part number 8550Pol or the dimensions 52 x 72 x 9 mm through WhatsApp or email. We can search other brands and lines while keeping the critical dimensions, and we can help identify the right seal from a sample or from measurements taken on the machine. Quotes and equivalent options come back promptly.