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post #1 of 9 (permalink) Old 04-04-2010, 07:51 PM Thread Starter
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Default How are the bearings in your router

After spending thirty years building high speed vaccum cleaner motors I want to pass on some info that may help . This post goes with all types of motors . most high speed routers use needle bearings at the top and the bottom of the armature because needle bearings surround the armature unlike ball bears that have spaces in between . Needle bearings cause less vibrations at high speeds to check to see if your routers bearings are okay folloe these very simple steps . 1, very important make sure router is unplugged then place a straight bit or a phillips screwdriver and tighten the collet 2. lay the router on its side you may need to wrap the bit so as not to tear up your hands .grasp the bit and try to move the bit right to left then left to right you may have a little play very little is okay if it is deemed okay that means your top bearing is okay . Now wiggle the bit up and down again a very little play is okay if it is somewhat tight or very little movement then the bottom bearing is okay . If you have quite a bit of movement in either of these positions I suggest to repair or take it to be repaired for this can cause numerous problems along with hurting the performance aswell as the work peice . these few steps used on any electric motor can save big dollars down the road . I hope this bit of info has helped at least one person ...... Mike Black
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post #2 of 9 (permalink) Old 04-04-2010, 08:01 PM
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Hi Mike - Thanks for your contribution. Good info to keep in mind, especially when garage sailing or doing the flea market/auction circuit.

John Schaben

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post #3 of 9 (permalink) Old 04-04-2010, 08:09 PM Thread Starter
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Thanks for the post john just trying to be of help to some or alot thanks again
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post #4 of 9 (permalink) Old 04-04-2010, 08:36 PM
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Make sure that you take your router to someone that knows what they are doing. I took mine to a local repair shop and it came back with the collett nut cross threaded which stripped off some of the threads on the shaft.
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post #5 of 9 (permalink) Old 04-04-2010, 09:58 PM
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Default How are your bearings in your router

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Originally Posted by mike black View Post
After spending thirty years building high speed vaccum cleaner motors I want to pass on some info that may help . This post goes with all types of motors . most high speed routers use needle bearings at the top and the bottom of the armature because needle bearings surround the armature unlike ball bears that have spaces in between . Needle bearings cause less vibrations at high speeds to check to see if your routers bearings are okay folloe these very simple steps . 1, very important make sure router is unplugged then place a straight bit or a phillips screwdriver and tighten the collet 2. lay the router on its side you may need to wrap the bit so as not to tear up your hands .grasp the bit and try to move the bit right to left then left to right you may have a little play very little is okay if it is deemed okay that means your top bearing is okay . Now wiggle the bit up and down again a very little play is okay if it is somewhat tight or very little movement then the bottom bearing is okay . If you have quite a bit of movement in either of these positions I suggest to repair or take it to be repaired for this can cause numerous problems along with hurting the performance aswell as the work peice . these few steps used on any electric motor can save big dollars down the road . I hope this bit of info has helped at least one person ...... Mike Black

Thanks Mike, This is good information to know.

Jack

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post #6 of 9 (permalink) Old 04-05-2010, 09:20 AM
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Hi Mike, whilst the advice you give is sound, I'm surprised that you say routers have needle bearings. Every router that I've stripped for repair or just cleaning have had ball bearings, these brands include Makita, Bosch, Ryobi, Black & Decker, Hitachi and even a Porter Cable. I haven't had cause to strip my Triton, but I suspect that it too has ball bearings. It would of course be nice to have needle or better still tapered roller bearings.
I wonder if Bj, our multi talented member would say a few words.

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post #7 of 9 (permalink) Old 04-05-2010, 09:38 AM
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Hi Guys

Most of the routers that I have taken down all have sealed bearing, I just replace the bearings if it's bad I don't recall taking the bearing down to parts to see what type it is..but I would bet it's the round bearing type, the roller bearing type would be nice but would push the cost of the router up very high..

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Originally Posted by harrysin View Post
Hi Mike, whilst the advice you give is sound, I'm surprised that you say routers have needle bearings. Every router that I've stripped for repair or just cleaning have had ball bearings, these brands include Makita, Bosch, Ryobi, Black & Decker, Hitachi and even a Porter Cable. I haven't had cause to strip my Triton, but I suspect that it too has ball bearings. It would of course be nice to have needle or better still tapered roller bearings.
I wonder if Bj, our multi talented member would say a few words.



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post #8 of 9 (permalink) Old 04-12-2010, 08:50 PM Thread Starter
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I stand corrected I have just taken apart an old router that I found in the trash and it to had sealed bearings that looked to be ball bearings . I too am surprised as I was always told by our engineers that needle bearings work best in high speed motors for ball bearings cause vibration due to the minute spaces in between where as needle bearings run side by side with no space inbetween . I am truely sorry and I will make an extreme effort to have more accurate info from now on . I stand corrected.......Mike Black
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post #9 of 9 (permalink) Old 04-12-2010, 10:03 PM
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Quote:
Originally Posted by mike black View Post
I stand corrected I have just taken apart an old router that I found in the trash and it to had sealed bearings that looked to be ball bearings . I too am surprised as I was always told by our engineers that needle bearings work best in high speed motors for ball bearings cause vibration due to the minute spaces in between where as needle bearings run side by side with no space inbetween . I am truely sorry and I will make an extreme effort to have more accurate info from now on . I stand corrected.......Mike Black
Hi Mike - That's OK, still a good idea to check them and you pointed out how to discern the top vs. bottom bearing. Thanks for the post.
On a side note. Kinda glad I no longer live out that way.. Waaay to close to Hartville tool....

John Schaben

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