What are lubrication nipples?

Lubrication nipple

The nipple connector makes it possible to connect a grease gun with a positive fit. The grease gun builds up pressure, whereby a bearing ball in the connector moves – in the opposite direction to the force of a retaining spring. The lubricant thus flows through to the bearing. If no further pressure is applied, the ball returns to its original position, creating a seal against dirt. These two functions – continuous lubrication of the bearing while protecting the lubrication point from external influences – ensure that machines and plant always keep moving.

Lubrication nipples in a variety of versions

There are different types of lubrication nipple, such as conical, flat and ball-type lubrication nipples. The properties of the individual forms are standardised according to DIN. Conical lubrication nipples, for example, have a tapered insert thread according to DIN 71412 and are suitable for both manually and mechanically operated grease guns. Flat lubrication nipples (according to DIN 3404), on the other hand, have a fine thread for screwing in and are intended for lubrication points with a large lubricant volume. Ball-type lubrication nipples (standardised according to DIN 3402) are rarely used these days. They have a tapered thread and require the lubricator nozzle to have a force-locking connection.

TENTE castors with lubrication nipples

TENTE heavy-duty castors are equipped with a dust cover with an integrated lubrication nipple. This ensures that the castors keep running on a permanent basis. Special solutions according to individual customer specifications are also available on request.