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Old 10-20-2017, 02:46 AM   #1 (permalink)
 
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Default Help - questions about drilling bench drill shift

Pen table drill hole, with a special clamping tool fixed, draw the concentric line after the vertical drilling, the speed of 1500, the pressure is not fast, but after playing the hole before and after the hole are not the same (Figure)
** Trouble you help me to see me in the end is the problem in that? Is the gripping tool offset or the table does not cause a smooth dip or other problems, how to solve!thank!

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Old 10-20-2017, 08:52 AM   #2 (permalink)
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Your table is not perpendicular to the quill.

You need to put a shim under the table.

This video will show you one method that works:
https://www.youtube.com/watch?v=HoJ_0EzaIv4
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Old 10-20-2017, 09:08 AM   #3 (permalink)
 
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I would recommend that you drill your pen blanks on your lathe. . Videos here:

https://www.google.ca/search?q=youtu...MOeO0gKgv7zADA
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Old 10-20-2017, 09:12 AM   #4 (permalink)
 
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I agree with both Ed and Mal. Also, that looks like a 7mm hole, and 7mm bits will very easily go off-axis.
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Old 10-21-2017, 01:10 AM   #5 (permalink)
 
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Thank you, according to your method has been resolved, so thank you!
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Old 10-21-2017, 01:10 AM   #6 (permalink)
 
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Default Thank you, according to your method has been resolved, so thank you!

Quote:
Originally Posted by ed4copies View Post
Your table is not perpendicular to the quill.

You need to put a shim under the table.

This video will show you one method that works:
https://www.youtube.com/watch?v=HoJ_0EzaIv4

Thank you, according to your method has been resolved, so thank you!
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Old 10-21-2017, 07:23 AM   #7 (permalink)
 
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For drilling after correct alignment try DeWalt Extreme 2 drills they do not wander.

Use a straight rod in the drill chuck then square the table of the drill press first.

Have success Peter.
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