DBH 8640 radial shaft seal — 41 x 56 x 7

DBH 8640 is a reference of radial shaft seal, within Seals. Request a quote for 8640 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The DBH 8640 radial shaft seal is a lip seal for rotating shafts that prevents oil or grease leaks and blocks the entry of dust and water at the point where the shaft passes through the housing. Due to its dimensions of 41 mm shaft, 56 mm housing and 7 mm height, and its Mz design, it is used in gearboxes, pumps, electric motors and power transmission equipment operating at moderate speeds. MR Accesorios Industriales carries this brand and advises you so you choose the right seal.

This item is a DBH 8640 radial shaft seal, identified with the code 8640. Its dimensions are 41 mm shaft diameter (d), 56 mm housing diameter (D) and 7.00 mm height (h). The Mz design corresponds to a single-lip seal with a spring, designed to retain lubricant in one direction and keep it inside the assembly. The 8640 designation is the reference you will find on the manufacturer's product page and the one you should cite when ordering a replacement or an equivalent.

Typical applications for a seal of these dimensions include gearboxes, centrifugal pumps, electric motors, rollers and power transmission equipment. In all these cases the seal performs the same function: sealing the shaft passage without slowing its rotation. It is also used as a barrier against contaminants in dusty or humid environments, provided the shaft and housing are in good condition and the working speed is compatible with the lip design.

To install it, check that the shaft has no burrs, splines or wear in the contact area, and that the housing is clean and free of dents. Lubricate the lip with the same oil or grease used in the equipment before inserting it, and do so with a tube or press that bears on the outer diameter, never on the lip. If the shaft shows a deep groove, consider a seal with an offset lip or a wear sleeve. Selection depends on the fluid, temperature and speed; with that data we define the appropriate variant.

If you need an equivalent, send us the code 8640 along with the shaft, housing and height dimensions, and the type of lubricant the equipment uses. With that we review alternatives within the DBH line or from other brands we carry, and tell you the compatible option. We can also search by dimensions if the manufacturer changed the designation.

To request a quote for the DBH 8640 oil seal, message us on WhatsApp and send us the code 8640. At MR Accesorios Industriales we handle technical inquiries on seals and oil seals, and help you identify the right part according to dimensions and use. If you have doubts about installation or the condition of the shaft, tell us the case and we will look at it together before deciding on the purchase.