DBH 9521/85 radial shaft seal — 20 x 30 x 7/8

DBH 9521/85 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 9521/85 and any equivalents.

The DBH 9521/85 is a radial shaft seal that keeps lubricant in and contaminants out of rotating equipment. It fits a 20 mm shaft and a 30 mm housing bore, with a height of 7.00/8.00 mm. The lip runs against the shaft while the outer surface is press-fitted into the bore, making it a wear item in pumps, motors, gearboxes and similar machinery.

This seal carries the DBH designation 9521/85 and the Lx design, which means a sealing lip with a spring that maintains contact on the shaft. The dimensions are shaft 20 mm, housing 30 mm and height 7.00/8.00 mm. The dual height gives some room during installation as long as the bore dimension is respected. Because the lip is precise, the shaft surface should be smooth and free of burrs for the seal to work as intended.

You will find this size in centrifugal pumps, electric motors, gearboxes, compressors and power transmission equipment. In each case the seal holds oil or grease in place and keeps dust, water and particles away from bearings and gears. Its compact envelope suits small-diameter shafts where space is tight and continuous rotation demands reliable sealing.

When selecting a replacement, confirm the shaft is 20 mm with the correct tolerance and the housing bore is 30 mm. The mounting height must match the available space, and the 7.00/8.00 mm option provides some flexibility. Shaft hardness and roughness matter for lip life. During installation, lubricate the lip and keep sharp edges away from it. For high-speed or high-temperature service, ask about alternative materials.

For an equivalent seal, contact MR Industrial Accessories LLC with the part number 9521/85 and your shaft and housing dimensions. We can also help you choose the most suitable design based on speed, temperature and lubricant type.

To request a quote on this DBH 9521/85 oil seal or to ask about other sizes, send a message on WhatsApp or by email. Include the part number and your equipment dimensions, and our team will reply promptly with a recommendation or an equivalent option.