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Sanding (Read 422 times)
 
Greg Pounsett
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Vicmarc
Sanding
Feb 13th, 2017 at 12:27am
 
Hello members, I have read a lot of info in magazines re what is the preferred sanding speeds to get a polished finish whether it's a centre piece of work or, between centres. Would like to hear from anyone who has a better grasp on this than I. Cheers Greg
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Ron Sardo
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Re: Sanding
Reply #1 - Feb 13th, 2017 at 8:58am
 
Greg Pounsett wrote on Feb 13th, 2017 at 12:27am:
what is the preferred sanding speed

Slow.

Depending on what is needed, you might start with 100 grit. As you progress to a finer grit you will see a more polished look. Some like to go to 400, others up to 2,000.

Also, some woods polish better than others.
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Ed Weber
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Re: Sanding
Reply #2 - Feb 13th, 2017 at 10:08am
 
Greg Pounsett wrote on Feb 13th, 2017 at 12:27am:
what is the preferred sanding speeds to get a polished finish whether it's a centre piece of work or, between centres


I agree with Ron and IMO it's largely determined by the wood.
Sanding is a process of incrementally reducing surface scratches. Different species each have their own characteristics, there is no single speed or even range of speeds that will apply across the board.
So a vague answer is all you can really hope for.
Slow enough to keep from over heating and fast enough to be smooth and efficient.
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Don Stephan
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Re: Sanding
Reply #3 - Feb 13th, 2017 at 10:30am
 
When hand sanding spindles, circular sanding scratches is a real frustration.  To try to minimize them I don't run the lathe faster than 400 RPM and move the sandpaper back and forth along the lathe axis rather quickly.  If sanding with a grit less than 220, often I'll then turn off the lathe and hand sand along the lathe axis before moving to the next grit.  And I'm not skipping grits.

When power sanding, the sanding pads don't last very long at all if the drill speed is high and/or the pressure on the wood is significant.
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Greg Pounsett
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Vicmarc
Re: Sanding
Reply #4 - Feb 14th, 2017 at 12:28am
 
Gents, thanks for the replies. I guess the same rules apply for face work, in  bowls and, boxes etc? I generally use a rotary sander that works off the revolutions of the lathe speed. Cheers Greg
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robo_hippy
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Re: Sanding
Reply #5 - Feb 14th, 2017 at 12:03pm
 
Light pressure, slow speeds for both wood and angle drill so the abrasives get better 'traction' for cutting. If you hand sand and fingers are getting hot, so is the wood, which is bad for the wood, slow down and ease up.. I mostly do bowls, and use an angle drill. Drill speed is never above 600 rpm.

robo hippy
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