Repairing A Makita 5007nb wobble

[phoenixgod414]

We have 7 saws we use at work 5 being makita 5007nb. The older ones tend to get used for cutting plywood simply because it puts more strain on them. As a result they become less accurate. However, we have one saw that you have to rotate at least 10 degrees either direction to keep cutting a straight line. The is less then 5 years old and everything else on it is in good condition. I think it is simply the main bearing that attaches through the worm gear has worn out from all the abuse. My question is:

How do I dissasemble from the worm gear up through the bearing retainer ring? Is the retaining ring threaded on or pressed on? I have tried a couple of different things but I don't want to apply too much force and end up replacing more than I have too.

Thank you in advance for any help.

[cmoorejack]

Hey phoenixgod414,
The bearing retainer is threaded..it has raised tabs that you can tap against with a flat punch or screwdriver to remove..righty tighty lefty lossey i believe..if it gets tighter one way just loosen it the other way....
also look for wear or play on the spindle shaft as this may cause some wobble..and check your inner blade washer for grooves or wear..
be sure and look over an exploded view of your saw before you get down and dirty so you will feel more comfortable with the repair..[you may also need a bearing puller and or a press to remove the gear and bearing]
parts and the breakdown are avail at ereplacementparts.com
hope this is helpful...
Craig

[phoenixgod414]

thats what I thought it was. I already replaced the inner blade washer (it was showing signs of wear.) That did seem to corect it at first but when I tried to cut through 3-1/2" pieces of plywood, the saw was all over the place. I just got the main shaft bearing in the mail. Hopefully this will fix the problem but htanks to you now I know who to put it in!

[tripletdaduk]

hi ,just a thought ,have you checked the blade for warp? or do you have movment on the spindle ? ie with machine off and unpluged if you hold the blade can you move it backwards and forwards ,or from side to side? if not ,have you checked when machine is running if theres any blade wobble? best way to check is to run it up to full speed ,than switch off and watch blade,will be much more noticable just before blade comes to a complete stanstill..
hope this may help