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Old Sep 30, 2014, 08:13 PM
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The NSK 6206V bearing with non contact rubber seals is good for 11,00RPM with grease.

Choose a name brand bearing, SKF, Timken, Barden, NSK, FAG, NACHI, NTN, etc. A ton of pressing force may require C3 or C4 clearance check with Intelitek. The old bearings may or may not be marked with clearance.

Greg
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Old Sep 30, 2014, 10:36 PM
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I would expect the pressing force was just to make sure they are seated. Its an aluminum housing so would deform if the clearance was too tight.

7206 are angular contact bearings of the same size. I think they would work fine. I was concerned that changing bearing types can have unexpected results like heat buildup. If you feel like experimenting, they can be found around the same in cost as the NSK 6206V.

Megclay I was confused by your comment on yours needing help in the load department. These mills should have lots of power.
My spindle is sold as the 10,000 rpm geared one. It has enough power to be a bit scary being near it milling aluminum. So I have an aluminum chip shield for mine.
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Old Oct 01, 2014, 10:17 AM
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Without seeing the design it's hard to say if there is any benefit to using angular contact bearings. A small increase in thrust load capacity won't significantly change operation anyway. At high speed or with small tools runout is important so the biggest improvement could be had with high precision bearings, but at substantial cost. Even then you'd have to regrind the taper. I'm not sure you'll find 7206 with seals.

Greg
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Old Oct 01, 2014, 12:01 PM
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Thanks Greg and Rob
great help
I called Intelitek on the bearing and the motor
the bearing is a NSK 6206 VV (but Bob thinks standard no fit class ?)
and on my motor check the brushes and call baldor
at low rpm my motor has no power can almost stop it by hand
he thinks its just worn out.
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Last edited by megclay; Oct 01, 2014 at 07:26 PM. Reason: added nsk part number jpg
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Old Oct 01, 2014, 12:18 PM
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Sounds like brushes to me.
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Old Oct 01, 2014, 04:05 PM
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Looking through the NSK bearings, I did not see evidence of different fit classes in their 6206.
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Old Oct 01, 2014, 04:42 PM
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You just order the clearance required, they certainly make them in the common clearances. If Intellitek doesn't specify, they are probably using standard clearance.
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Old Oct 09, 2014, 06:14 PM
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Hi All
Put my prolight head into the press and pushed the spindle out real easy
not much pressure at all to remove it but both bearings stayed in the head
and did not want to come out, so I put the head into the oven at 170 F
and hit the bearings with compress CO2 compress air in a can
and both came out real easy (almost fell out)
I will order the new bearings with standard clearance (I hope that's correct)
and maybe draw up the spindle before I put it back
I would like to replace the R8 spindle with a BT30 spindle or other
more common quick change
megclay

added 3D and 2D spindle models, spindle wall is very thin (also not hardened)
no way to change to a BT30
and my bearings are still good no grease in them ?
But I will buy new ones anyway
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Last edited by megclay; Oct 14, 2014 at 06:24 AM.
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Old Oct 09, 2014, 08:06 PM
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How bad where the bearings?
For awhile I though of making another spindle. But most of my projects only use one size endmill.
A higher rpm spindle, like a jig grinder for the R8 taper, might be what I end up making.
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Last edited by Roto Rob; Oct 09, 2014 at 08:13 PM.
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Old Oct 18, 2014, 11:24 AM
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Nice work y'all. I'm running a Light Machines VMC 4000 in my shop. I've had it since 2003. Other than two drives and an encoder failing it's been a good machine.

TM
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Old Oct 18, 2014, 03:02 PM
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I've been looking for a Benchman XT or VMC with a tool changer. Too bad there aren't very many of these around.
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