Rack Drive Lubrication

2.2.1 Functions of Lubrication

To maintain the function of the rack drive, adequate lubrication with a lubricant suitable for operating conditions is required. This also includes regular relubrication.

Lubrication performs the following functions:

• Separating metal rolling contacts by forming a stable lubricating film
• Minimizing wear
• Reducing friction between gear and rack rolling contact surfaces
• Preventing corrosion
• Reducing running noise

Therefore, lubrication has an important influence on the function and service life of the rack.

2.2.2 Lubricant Types

Rack drives can use grease, fluid grease, or oil as lubricants. Mineral oil-based lubricants or synthetic lubricants can be used, some of which contain a proportion of solid lubricants such as graphite or MoS₂.

2.2.3 Lubricant Properties

For lubricants for open gears and racks, it is important to ensure they have high viscosity and adhesiveness to prevent them from being thrown off by rotating gears.

Other properties that the lubricant must meet include:

• High shear stability
• Good wear protection
• Good corrosion protection
• Oxidation stability
• High pressure stability

2.2.4 Recommended Lubricants

Lubricants recommended by SCHNEEBERGER:

Oil Lubrication

Mineral oil CLP according to DIN 51517, viscosity grade ISO VG 460 according to DIN 51519

Grease Lubrication

Lubricating grease OGP2K according to DIN 51825