DBH 8838 radial shaft seal — 12 x 25 x 5

DBH 8838 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 8838 and any equivalents.

The DBH 8838 is a radial shaft seal that keeps lubricant in and contaminants out where a shaft rotates. It fits a 12 mm shaft, a 25 mm housing bore and a 5 mm depth, and its Lz lip and case geometry do the sealing work. Because the lip wears against the shaft, the seal is a maintenance item: once it starts weeping, replacing it early protects the bearing and the lubricant.

The seal carries the code 8838 and belongs to the DBH line. Its three key dimensions are shaft 12.00 mm, housing bore 25.00 mm and height 5.00 mm. The Lz designation describes the lip and metal case configuration, which is what determines how the seal behaves in rotation. Small as it is, this part often decides whether a reducer, pump or small motor stays clean inside or fails from contamination.

Seals in this size range show up on equipment with slim transmission shafts: compact gear reducers, gearboxes, centrifugal pumps, small electric motors, machine tools and general power transmission drives. You also find them on agricultural implements and process machinery where oil or grease must stay in while wash water and airborne dust stay out.

Installation matters as much as the part. The shaft surface must be free of burrs, nicks and tool marks, since the lip rides directly on it and any scratch becomes a leak path. Lubricate the lip with the same oil or grease used in the equipment, then press the seal in squarely, perpendicular to the shaft, without hammering on one side. A worn or out-of-round housing will prevent sealing even with a new seal, so check that too. When selecting, confirm all three dimensions: shaft, housing bore and available depth.

If you are unsure of the code, measure the old seal or the shaft and housing with a caliper and send those numbers. We can match them to an equivalent in the DBH line or another brand we supply, and confirm the choice before you order. We can also review design options if the application runs at high speed or temperature.

Send the code 8838 on WhatsApp or by email and our team will prepare a quote. If you prefer, send a photo of the worn part along with the shaft and housing dimensions, and we will help you identify the right replacement.