7.7 Lubrication during hubbingTo pr

7.7 Lubrication during hubbing
To prevent cold welding between the hub and the workpiece, the following measures are necessary:
– The surfaces of the hub which come into contact with the workpiece must be polished.
– Brush the hub surface with copper sulphate solution (acts as a lubricant binder).
– Lubricate with molybdenum disulphide