Bearing run-out

[John Saxton]

Amongst you knowledgeable folk out there who would have an idea to what the parameters are in regards to run-out of the small bearings on routers?
I guess any ovalisation of cut could be deemed excessive run-out and therefore need attention much as any power tool within your shop!
I have bought a dial guage after trouble with my lathe and was just wondering what the accepted norm would be,there is no mention of limits in my tool guides.
TIA
Cheers http://ubb.ubeaut.com.au/ubb/smile.gif

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Johnno

[RETIRED]

Gooday.

John, I would say that any more than 2 or 3 thou (0.002-0.003)is not acceptable. Remember, these things spin at 20,000 RPM.

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Ian () Robertson
"We do good turns every day"

[John Saxton]

Thanks ,It looks as though the old MV12 is due for a tune-up after many years of good service,another accolade to Hitachi.
Cheers http://ubb.ubeaut.com.au/ubb/smile.gifMerry Christmas to you and Julie

[Rod Smith]

Hi John, before you go changing bearings I just wanted to ask how you checked for runout, ie did you put in the collett? If so, maybe its just a dirty collet, had that problem myself before. Seeya. Rod

[Rod Smith]

That was supposed to be, did you put a bit in the collett and check the runout on it.
Bye

[John Saxton]

Hey Rod,thats how I found the anomaly with it.
I had mounted a lengthy flush trimming bit in the router which was table mounted,and upon starting up the bit looked as if there was a distinctive throw to it probably more manifest by the long bit any how I took the bit out and put the guage on the shaft where there appeared to be about .0002 on the guage.No problem with the collet
Have taken it in to the bearing shop where they will replace the bearings for me.Should have it back this arvo.
Cheers http://ubb.ubeaut.com.au/ubb/smile.gif

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Johnno

[Rod Smith]

No worries mate. Great router eh!

[John Saxton]

Rod it makes you wonder with the amount of machinery out there how much is checked for required maintenance.
I must admit I do take things for granted until something stands out as it did with me but no worries I'll tuck it back in the ol'mind frame until apathy rears it's ugly head again!
ALso wondering why some of those smaller bits were not as true as there have been some problems with cuts for a while, probably due to me dropping the router on the floor some months back....but bloody hell them Hitachi's will take anything won't they?
Cheers http://ubb.ubeaut.com.au/ubb/smile.gif

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Johnno

[JT]

Speaking of 'dropping routers' i took my makita out of the router table and put it on the bench, adjusted it all with the bit i was going to use.....then pluged it in, what i hadn't done was turn it off at the switch so the moment i flicked on the power it spun around and literally flew onto the ground. Anyway i have never made that mistake again!! The router worked exactly the same as before. ( ain't i lucky!!!)

[Rod Smith]

I'm just trying to picture a router that can fly? Maybe with a large panel raising bit, like a helicopter? Certainly could be a chopper. Seeya. Rod

[John Saxton]

JT,I guess you must be thankin' your lucky stars you weren't part of a human carvin' exercise what with that angry router of yours!
Whats the sayin' Measure twice cut once! but always think safety.
I would imagine that many of us have been down that track but don't have the humility to admit it unlike you.
It is an awakening to all to hear of anothers misfortune if only to learn that accidents are there waiting to happen with a little help from apathy.
Once bitten Twice shy is a good sign that we could all hang in our workshops.
Cheers http://ubb.ubeaut.com.au/ubb/smile.gif

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Johnno