Drill Press Vibration Issue...
#11
  
I have a HF 10" drill press that has more vibration than I'd like.  With belts off, the motor runs smoothly.  There are 3 pulley assemblies.  The center assembly pivots, but also is loose enough to have some side-to-side flop...like the assembly flops not parallel with the other 2 assemblies.  Could the vibration be coming from that or is that flop in the design?  I'll try to post pics.


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#12
  Re: Drill Press Vibration Issue... by darita (I have a HF 10" dril...)
You've added link belts. Did it run the same (vibrate) with the original belts?
Steve





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#13
  Re: Drill Press Vibration Issue... by darita (I have a HF 10" dril...)
As a test, you might try reassembling your link belts into one long belt that bypasses the center pulley and see if the vibration goes away.
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#14
  Re: Drill Press Vibration Issue... by darita (I have a HF 10" dril...)
Are you sure you're tightening the belts enough when you change pulleys? Once tightened, there shouldn't be any "slop" in the center pulley.
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#15
  Re: Drill Press Vibration Issue... by darita (I have a HF 10" dril...)
(11-12-2019, 02:20 PM)Ohio Mike Wrote: As a test, you might try reassembling your link belts into one long belt that bypasses the center pulley and see if the vibration goes away.

That's a super way to isolate the pulleys!

g
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#16
  Re: Drill Press Vibration Issue... by darita (I have a HF 10" dril...)
If the pulleys aren't running true, you'll never get it to run smooth.

Runout to the shaft, V grooves that aren't true.

The center pulley would have a spring loader for a smoother run.

Light weight machines are more subject to even slight vibrations.

My vote is for poor shaft to pulley fitting and poorly machined and light weight pulleys.
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#17
  Re: Drill Press Vibration Issue... by darita (I have a HF 10" dril...)
Ya...Looking at the pulleys spinning, I can see some wobble in the front spindle pulley...that can't be good.  Can I actually eliminate that center pulley?
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#18
  Re: Drill Press Vibration Issue... by darita (I have a HF 10" dril...)
Yes. That would eliminate some of your speeds though. May have to turn one of the other pulleys upside down I think? Hafta mull that one over here.....
Steve





Working on it Winkgrin





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#19
  Re: Drill Press Vibration Issue... by darita (I have a HF 10" dril...)
The spindle pulley is usually a type of (metric?) morse taper fit. You could always try and pull it loose and turn it a little at a time, and if you're lucky, find a sweet spot without a wobble.

You can do without the center pulley but changing speeds would require a different sized belt each time.
"There are no strangers- only friends I haven't met.
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#20
  Re: Drill Press Vibration Issue... by darita (I have a HF 10" dril...)
I have a benchtop radial arm drill press. It's always had a vibration, link belt didn't help.  Replaced the cone pulley on the motor with a decent quality single pulley and vibration went away. At least I know where the problem lies, not sure how to balance the motor cone pulley. Considering a VFD and 3 phase motor for lower speeds, don't know if the drill press is worth it.
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