evanthayer
Aluminum
- Joined
- Jun 13, 2018
Hi All,
I am attempting to press a new bronze bearing into the QCGB casting bore for the central shaft of my 1952 9A. I've pressed a number of bearings in but each has compressed past the required shaft OD clearance during installation, preventing central shaft insertion or rotation.
I measured the ID of the bore and the OD of the bearings and found this:
Bore ID = 0.7465
Bearing OD = 0.7525
I'm assuming the issue here is the interference fit? I've got 6 thou and I'm guessing it should be around 2 thou? Is the next step turning the OD of the bushing down by 3 - 4 thou? I don't have another lathe but I can finish the restoration and use it to turn the bushing down and install the QCGB later. What have other people done?
Thanks!
Evan
I am attempting to press a new bronze bearing into the QCGB casting bore for the central shaft of my 1952 9A. I've pressed a number of bearings in but each has compressed past the required shaft OD clearance during installation, preventing central shaft insertion or rotation.
I measured the ID of the bore and the OD of the bearings and found this:
Bore ID = 0.7465
Bearing OD = 0.7525
I'm assuming the issue here is the interference fit? I've got 6 thou and I'm guessing it should be around 2 thou? Is the next step turning the OD of the bushing down by 3 - 4 thou? I don't have another lathe but I can finish the restoration and use it to turn the bushing down and install the QCGB later. What have other people done?
Thanks!
Evan