Problems with the clearance of the induced draft fan bearings
Thread Content
One fan in the company’s incinerator requires a bearing replacement; there are two separate bearing housings involved. The bearing model is SKF 2220KM/C3, which is a tapered bore radial ball bearing. The original radial clearance was measured at 0.08 mm. I would like to ask the experts: is there a standard value for the radial clearance after installation? Are there any requirements for axial clearance?
As a supplementary note, the shaft is a solid shaft with a diameter of 90. The bearing is fixed to the shaft using a tapered retaining sleeve, and the nut is tightened until only a very small amount of radial play remains – is this considered acceptable?
It is best to consult the manufacturer or follow the instructions. For reference.
There is no instruction manual, and the manufacturer doesn’t provide any information either
The SKF 2220KM/C3 is likely an angular contact ball bearing, and should not be called a radial ball bearing. Unless the manufacturer specifies otherwise, it is generally sufficient to tighten the back cap with a hammer until it is secure during installation.
Yes, it’s a self-aligning bearing; I wrote it wrong. Thank you.
What should the axial play clearance be set at?
For the bearing game table, it is recommended to choose a large range. For reference only
SKF has standards for bearing clearances; just check them and you’ll find out.