How do I know my oil seal size?

The standard format is Inner size, Outer size, Width, all measured in millimeters. So, for example, a metric oil seal stamped with 25 45 5 has an inner ring size of 25mm, an outer measurement of 45mm, and a width of 5mm.

Are Timken and national seals the same?

National seals are distributed through The Timken Company and are stocked in their Crossville, Tennessee warehouse, as well as Bearing Service, Inc.

What is a single lip seal?

These standard, single-lip rotary shaft seals are designed for sealing rotary elements, such as shafts or rotating bores. They can help retain bearing lubricant and minimize the entry of dirt, oil and moisture that would otherwise cause damage and premature failure of bearings and other components.

Which way do lip seals go?

For oil, the lip should face inward along the shaft to hold in the oil. For greased bearings, the lip usually faces outward to allow the grease to purge.

How do you measure a seal?

On the back side of the “seal head” (the end which fits towards the “spring”), measure the inside diameter. This will determine the seal size diameter – which is either the shaft size or the sleeve size that the seal fits over. The front side of the seal usually has a black carbon face.

What is a lip seal?

The radial lip seals are widely used in wet environments like ships, water pumps and tidal turbines. The lip seals keep the oil or grease lubricant inside the application and prevents the ingress of water and dirt.

Which is better SKF or Timken?

With that said the bigger, harder to replace, heavier loaded bearing are Timken. SKF bearings are generally used on smaller quicker to replace applications. I never asked why, just always assumed the Timken is a better bearing.

Are Timken seals good?

Timken’s reputation is very good. The seals looked and felt like quality parts. This type of axle lubricates the bearings with gear lube from the differential, they bearings are not packed in grease. Good seals are required for trouble free operation.

Where are rotary lip seals used?

Rotary shaft lip seals are widely used for the retention or exclusion of fluids on rotating shafts across many applications. The dynamic sealing is achieved by a narrow edge, or lip, of elastomer or plastic in contact with a rotating shaft.

How big is a single lip oil seal?

Seals are available for any shaft diameter size in 0.001 inch increments, including Functional Range. max. *Standard cross-sections (CS) listed and non-standard sizes can be provided for any shaft size up to 63 inches. Surface finish: Shaft (A) plunge ground, zero lead, Ra 8-16µin – Housing (D,L) Ra 32-63µin.

How are single lip and double lip sealing rings different?

Single lip and double lip Sealing rings The quality of a bearing arrangement is decisively influenced by the components – shaft, housing, seal – that are directly adjacent to the bearing. Seals play a decisive role in protecting bearings against contamination.

How to tell if you need single lip or double lip grease seals?

The best way to determine what grease seals are needed for your spindle is to get the part numbers from the inner and outer bearings from that spindle. If you have the bearing part numbers, then I can help you get the correct single lip or double lip grease seal that you will need.

What kind of pressure does a lip seal need?

Rated for pressure up to 10, 000 psi, these seals withstand the highest pressure of our piston seals. These seals have a beveled lip that optimizes contact against the rod, while a secondary lip keeps the seal stable.