grease seal

grease seal

[′grēs‚sēl]
(engineering)
Type of seal used on floating pistons of some hydropneumatic recoil systems to prevent leakage past the piston of gas or oil; also used in cylinders of some hydropneumatic equilibrators.
Seal used to retain grease in a case or housing, as on an axle shaft.
References in periodicals archive ?
A set of two bearings, cones and a grease seal is around $16 for 1-inch axles.
An example is the grease seal, NSN 5330-00-849-4366, for the CH-47, shown in Fig 182-2, TM 55-1520-240-23-P.
Powered by a 13-horsepower gasoline engine, the efficient constant grease seal pump delivers 20 percent more fluid capacity than the MM9 fluid system, moving 42 viscosity slurry at the rate of 200 gpm.
"During our first incident, the grease seal didn't allow the lubricant to escape while doing preventive maintenance (PMS), causing the sheave to seize," said Caldwell.
For example, a grease seal that formerly went to a drill press and then to a milling machine now is completed by the Arrow 750 with savings of 20 min/part.