Spindle advise

Checked the spindle run out,they claim .005mm, we saw .010-.008mm at the collet and 50 mm out from the spindle saw the same .010-.008mm .002 is clearly from the roundness of the 8mm carbide piece and bearings.
It feels very smooth to turn by hand.
Will post more when I see it running after the water and power is connected.
 
Kelly_Guy said:
I know one cuemaker who bought one of these trimmers to try out. It was bad, huge runout. I think he checked all of them in the store and they were all the same.

I hope it is obvious that I am not questioning Sherm, it just might be good if someone who has had equal success with these, someone who has actually tested the runout, could also post. It would be good to know which is the norm for these, dead nuts or huge runout.

Kelly
Click to expand...

Hey Kelly,
I went to the local hardware store and tested a bunch of trim routers with a dti and 1/4 carbide blank.
One was .1mm(.004 inch) at the collet, but was off the range of my dti at
5 inches out.
Most were like this or similar.
Some were 0.2mm out at the collet and a bunch out at the end of the rod.
1 was .1mm at the chuck but still .1mm at 5 inches out.
Then I started to check the spindle. This one was almost zero front and back inside the spindle, less than the increment of the dti (.01mm)

The second to last tested one that had .1 runout at the collet and off the dti at 5 inches, the spindle was .07mm at the front and 0.13mm at the back of the spindle.

One of the Makita ones I tested was really great, .02mm at the collet and about .04 at the end of the rod. I did not buy it, as I was wanting something with a variable speed soft start on it.I did not test the spindle on that one, just the test bar in the supplied collet.

Tested a total of 10 tools from different batches and manufactures.

For the one I brought, I will make a range of collets for it.
I did not half get alot of strange looks from others around including a patient wife.
The shop was very kind to open up all the boxes to let me sort through to find a good one. The Makita was the store display model.
Neil
 
Ran up the spindle on the bench. It is very quiet and smooth. Even at 24k there is not alot of noise. Sounds like a small turbine.You can have a conversation while it is going. Had it running from 600 rpm through to 24k. Seems fine so far. Next report will be when he gets his router made and it is all running.This machine is being made to manufacture his own design Beehives.
Neil
 
thanks for the info, Abaut China Spindle, Do you think that these data are acceptable for cue inlays?
 
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fiolledapool said:
thanks for the info, Abaut China Spindle, Do you think that these data are acceptable for cue inlays?
Click to expand...

If the cutter runs within .01mm TIR like the setup we tested on the bench,then most certainly.
Keep in mind these are cheap for what they are. He may have been lucky I don't know. It is hard to quality control a product from a sample of 1
Neil
 
I just finished helping him make the Z axis assembly. The water cooled spindle really is very quiet. I guess being water cooled reduces the over all noise from the unit.
I like the fact that the water cooled unit has less total air movement in the shop.
 
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