What is the difference between single lip and double lip oil seal?

What is the difference between single lip and double lip oil seal?

Oil Seal Single Lip vs Double Lip The single lip is vital to the function of the seal by containing the oil, grease or lubricant. The only difference between a single and double lip is the additional rubber lip on the top of the oil seal which helps prevent dust or dirt from coming close to the shaft.

Are grease seals reusable?

If you are replacing bearings it is usually best to replace the grease seals as well because although they may still be in good shape, it’s very hard to get them out without damage which is needed to change the inner bearing. If you can remove it without damage and it’s still in good shape then by all means reuse.

How do you measure a grease seal?

You’ll need a precision caliper to measure the hub bore to the nearest thousandth – to three decimal places such as 1.234. The 10-19 seal has an outer diameter of 2.565-inches. Next you’ll need to measure your spindle at the point where the grease seal rides.

What does a double lip seal do?

Double lip oil seals feature two lips for better fluid separation or contamination exclusion. Many oil seals are spring loaded to provide constant, a uniform load of the lip on the shaft for the life of the seal. The spring load also provides a constant load on both lips of the double lip seal.

Can you reuse trailer bearings?

Keep the bearing as clean as you can. You can reuse it if it’s in good shape. Then, pull the hub all the way off; the inner bearing and seal should stay in the hub. Check the seal.

How are seals sized?

Males measure about 20 feet long (6 meters), while females are about half as long. The smallest is the ringed seal, with an average length of 5 feet (1.5 m) and a weight of 110 to 150 lbs. (50 to 70 kg). Unlike other seals, males and females are about the same size.

What size oil seal do I need?

Standard and Metric Oil Seal Size Chart

Oil Seal Size # Shaft (IN) Width (IN)
6 0.125 0.085
7 0.125 0.250
8 0.138 0.118
9 0.156 0.187

Which way does a double lip seal go?

Orient your seal the same way as the initial install. The sealing lip should face the lubricant that requires sealing. The second lip on a double lip oil seal is intended as a dust lip. The seal must be installed at a 90°, or perpendicularly, to both the shaft and housing bore.

How long do lip seals last?

(In actuality, advanced rotating labyrinth seals have an estimated operating life of 10 years.) The payback exceeds 3:1. This time, assume we use a lip seal and run it to failure. Allowing the lip seal to degrade might cause a bearing failure after perhaps two years of operation.

Can you replace a bearing and not the race?

If the race surfaces are completely smooth and free of discoloration (most often caused by heat build up) then you can leave them in place and just replace and re-pack your bearings.

When should I repack trailer bearings?

How often should you repack your trailer bearings? The axle manufacturers recommend that you repack your trailer bearings once annually or every 12,000 km.