Kit, Imperial & Metric, Grease Nipples, 260 Pieces

Description

Grease Nipple Kit Imperial & Metric, 260 pieces.

A kit comprising 260 grease nipples with Imperial & Metric Sizes in a handy box with partitions.

A grease fitting, grease nipple, Zerk fitting, grease zerk, or Alemite fitting is a metal fitting used in mechanical systems to feed lubricants, usually lubricating grease, into a bearing under moderate to high pressure using a grease gun.

Grease fittings are permanently installed by either a (taper) thread or straight push-fit (‘hammer in’) arrangement. This leaves a nipple connection that a grease gun can attach to. The pressure supplied by the grease gun forces a small captive bearing ball in the fitting to move back against the force of its retaining spring. The arrangement is thus essentially a valve that opens under pressure to allow lubricant to pass through a channel. Lubricant then forces into the voids of the bearing. When the pressure ceases, the ball returns to its closed position. The ball excludes dirt and functions as a check valve to prevent grease escaping back out of the fitting. The ball is almost flush with the surface of the fitting so that you can be wipe it clean to reduce the amount of debris carried with the grease into the bearing.

The common convex shape of the fitting allows the simple concave tip of the grease gun to seal against the fitting easily from many angles, yet with a sufficiently tight seal to force the pressured grease to move the ball and enter the fitting, rather than simply oozing past this temporary annular (ring-shaped) seal. For higher pressure greasing, the grease gun end latches onto the nipple and seals as a butt joint. If you don’t align this type of gun end perfectly with the nipple, they leak. Once you complete greasing, you can release the latched on nozzle. You do this by angling the nozzle over to break the seal with the nipple. Once you break the seal, the pressure in the nozzle releases and this releases the latching fingers.

Zinc-plated steel, stainless steel, or brass are the most common manufature materials for grease fittings.

For more information on the Grease Nipple Kit please contact our sales team.