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Old 08-24-2016, 08:24 PM   #1 (permalink)
 
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Default Rpms for Penturning

Looking for a new lathe and perhaps a bigger one. i have turned at least a 1000 pens and turned most of them on my small lathe that goes to 3200 rpm usually run it about 2700
My larger lathe I have turned pens on, but it only runs to 2000.

Thoughts, preferences and I do understand that most people turn at a speed they are comfortable with.

Kindest regards,

Coy
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Old 08-24-2016, 08:27 PM   #2 (permalink)
 
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I turn pens and other things as fast as it will go. Pens are always at 3500RPM
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Old 08-24-2016, 08:33 PM   #3 (permalink)
 
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Default speed

Quote:
Originally Posted by Coysquibbly View Post
Looking for a new lathe and perhaps a bigger one. i have turned at least a 1000 pens and turned most of them on my small lathe that goes to 3200 rpm usually run it about 2700
My larger lathe I have turned pens on, but it only runs to 2000.

Thoughts, preferences and I do understand that most people turn at a speed they are comfortable with.

Kindest regards,

Coy
I turn slower to start, until I have to square edge's off.
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Old 08-24-2016, 08:33 PM   #4 (permalink)
 
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For pens, turn it high and let the shavings fly!
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Old 08-24-2016, 08:36 PM   #5 (permalink)
 
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The lathe that I am looking at only goes to 2400 rpm but it is full size and would be great for bowls. I don't feel that is enough for pens.
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Old 08-24-2016, 09:40 PM   #6 (permalink)
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As you know, bowls require slower speeds, but pens generally work better at much high speed.

The circumference speed of a 12 inch bowl turning at 500 RPM would be about 18 miles per hour. It probably needs to slow down to 400.

A 1 inch diameter blank will be turning at the speed of 1.4 miles per hour at 500 rpm. Pens need to turn at least 4 to 5 times faster RPM than a 12 inch bowl

My math may be off because of aging but I don't think it is off by too much.
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Old 08-24-2016, 10:05 PM   #7 (permalink)
 
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You can very easily turn pens at that speed. It is something you may need to just get used to. Heck they turn pens on lathes operated by your feet
Or just keep 2 lathes.
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Old 08-24-2016, 10:17 PM   #8 (permalink)
 
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Quote:
Originally Posted by leehljp View Post
As you know, bowls require slower speeds, but pens generally work better at much high speed.

The circumference speed of a 12 inch bowl turning at 500 RPM would be about 18 miles per hour. It probably needs to slow down to 400.

A 1 inch diameter blank will be turning at the speed of 1.4 miles per hour at 500 rpm. Pens need to turn at least 4 to 5 times faster RPM than a 12 inch bowl

My math may be off because of aging but I don't think it is off by too much.
s
So Hank, I am guessing that by your math, 2500 rpm would be acceptable.

thanks for the input.
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Old 08-24-2016, 10:21 PM   #9 (permalink)
 
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Thank you all for your input. Its a tough call. I know a lot of guys that say you have to have 3200 + rpm. I think sharp tools are the key. I don turn a lot of cast blanks and i don't want to buy another big lathe if it is not optimum.

Coy
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Old 05-28-2017, 01:23 AM   #10 (permalink)
 
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Depends on material and cut making


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