slewing bearing assembly

Slewing bearing is a kind of large bearing with special structure, which can bear the overall load such as axial load, radial load and overturning load.

It combines support, rotation, transmission, fixation, sealing, anticorrosion and other functions into one unit.

• Inner and outer rings

Generally, slewing bearings consist of two rings, each ring contains  a precision raceway that is Induction quenched on the surface to a specified depth.

Each ring is forged from 50Mn or 42CrMo.

Different internal structures can be selected according to load capacity, including Single-row ball series、Double-row ball series、Double-line ball series 、Roller and ball combination series、Three-row roller series.

• Rolling body

The precision rolling body can promote the relative rotation between the inner and outer rings.

Steel balls or rollers are often used as rolling body.

• Isolation block

Spacer blocks usually made of nylon which are usually used to separate balls or rollers,

this prevent them from rubbing against each other directly .

Under special conditions , steel and copper holder can be used.

• Mounting holes

The mounting holes are usually spaced along the surface of the inner and outer rings which along a uniform bolt circumference and equally spaced apart.

These holes can be through holes, threaded holes, blind holes, countersunk holes, etc. Sometimes, need to customize bolts with spacing requirements to meet a specific application.

• Sealing strip

There are sealing strips on each side of the slewing ring bearing.

Its main function is to retain grease and prevent certain contaminants (such as dust and debris) from entering.

The seal is usually made of Nitrile Butadiene Rubber.

• Plug

Drill a hole in the position of the non-gear ring or the outer ring of the non-gear bearing, and install the ball or roller into the slewing ring raceway.

The hole is plugged and fixed with a taper pin.

The unhardened clearance will be engraved with the word “S”, Namely: soft belt.

• gear

Slewing bearings are available in toothless or internal or external type.

Custom gear configurations are also available.

• Greaser

The slewing bearing include at least one grease fitting

The number may increase with the diameter of the slewing bearings.

For gear bearings, the grease fitting is located on the inner or outer circle of the toothless ring.

• The sign

The part number and serial number are engraved next to the plug of the slewing bearing.