| The Breakroom > The Water Cooler |
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| John Rudd:
I'm currently in the process of rebuilding this machine with new taper roller bearings.......But I have a concern with the preload.... The standard roller bearings are an interference fit on the spindle. This type of bearing doesnt usually have any adjustment for axial preload therefore the bearing are not a sliding fit on the shaft. Taper rollers OTOH, are meant to be adjustable, ergo they should be able to move longitudinal along the shaft and the shaft journals need adjusting to suit the bearing? :dremel: However after watching the Youtube vids posted here: &playnext=1 The presenter is seen to be pressing the inner race onto the shaft.... So who is right? Me, in that my thinking is correct (or I am totally wrong) or the presenter is correct? :scratch: Any mechanical fitters in our midst? |
| David Jupp:
In the C3 Preparation guide on the ARC Euro site, the section on fitting taper roller bearings mentions polishing the journals if the original bearings were a tight fit on them. It suggests you are looking for a 'push' rather than 'press' fit. I.E. as you surmise, relative movement is possible (just). |
| John Rudd:
David, Yes I saw the write up and it is easy to miss the reference to polishing the journals. ( I saw it the third time I re read it! :doh: ) I feel more comfortable now knowing that they require 'adjustment' to fit. :dremel: |
| andyf:
I think I can predict your next question, John: "How do you set the bearings to the correct preload?" Andy |
| John Rudd:
Andy, That question would be, if the bearings were just standard ball roller bearings, but as we are talking taper, then that is different if the bearings cannot move 'easily' on the shaft. |
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