Re: Bearing Replacement on KF7
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If the Machine has been stood up for 8 years, then bearing grease has almost certainly dried out.
Extracting the shaft is not too difficult a task, however changing the bearings can prove a little challenging.? Having recently done this on my 6 series i would suggest this is a job for an engineering shop.
There are two bearings on the saw shaft with a spacing sleeve in between to prevent any alignment issues (I'll come to that later) the sleeve has been fitted to the shaft while hot so requires a large amount of force?(13.5
tonne on a hydraulic press) to remove .
Ideally you want someone who has an induction coil that will heat the sleeve more than the shaft to help get this off the shaft to change the inner bearing. Likewise, it will need to be heated before trying to refit so as not damage the shaft due to metal transfer.
The saw shaft is no longer available as a spare and the bearing spaced is ?45 this side of the pond.? so these ar parts it is preferable not to damage.
David is correct in stating that you should check the motor and the saw shaft bearing before disassembling anything as it could be either.
With regards to the alignment issue, it is relatively easy to eliminate the shaft from the equation.
If you check that the bearing on the saw side of the casting, it should be almost flush with the milled section on the top of the casting that the two hex head bearing retaining bolts and washers fit into,
if it proud then it's possible that the bearings have been changed previously and either not assembled correctly or not installed correctly.
The splitter arm mounts to the casting with two allen bolts and two roll pins for alignment, in the past if the bolts have worked loose then it is possible for dust to get down between the arm and the casting and push things out of alignment.
It would be worth removing the two bolts and separating the arm and the casting buy an 1/8 of an inch ang giving it a good clean and see if that resolves the issue.
I have attached the part drawing for the K7 saw albeit this slightly pre dates your machine.
I hope this helps
Paul
From: [email protected] <[email protected]> on behalf of contact@... <contact@...>
Sent: 11 March 2021 23:08 To: [email protected] <[email protected]> Subject: [FOG] Bearing Replacement on KF7 ?
I'm a new owner of a 1999 KF7F, I won it at an auction, all I know is that for the last 8 years its been stored in a shop unused. I've got a number of questions about getting it set up they way I would like with various accessories. But the current priority
is addressing a grinding sound coming out of the saw, somewhat intermittent but not going away, and probably getting worse. It started after a few weeks of use at my shop. Its probably a bearing, but before I take it all apart I'd like to know a little more
what I'm getting into. Mostly I'm worried about getting the blade back into an accurate position after the bearing is replaced.
Another issue, potentially related, is with the splitter. The saw came without the splitter, but when I installed a new one from Felder it was offset to the right of the blade by 1/32". I've shimmed it back, but I'm not sure where the issue is. Is the saw spindle offset, or is the arm holding the splitter bent or offset, or maybe the failed bearing is causing the problem. Any experience there would be helpful. And lastly, I'm happy to have found this forum. This is my first Felder purchase, and my first slider, so lots to get up to speed on. Thanks for any help. -Willis |
