Boring head speed

This topic has 3 replies, 3 voices, and was last updated 23 April 2017 at 16:40 by John Reese.

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23 April 2017 at 09:57 #294563
Eric Cox
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@ericcox50497
What speed would I run a boring head if I was boring a 1" Dia. hole in brass

I assume it's less than if I was turning or drilling as the offset of the tool would cause an imbalance and strain on bearings at high speed.
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23 April 2017 at 09:57 #8674
Eric Cox
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@ericcox50497
23 April 2017 at 10:02 #294564
JasonB
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@jasonb
Aim for your usual turning speed but adjust to keep the mill from bouncing off the table. A lot will depend on your boring head and which of the holes you have the tool in as to how out of balance it will be on any particular diameter.

I sometimes add a bit of bar to the horizontal hole to act as a counterbalance when using the outer vertical hole but just watch out as you won't see the spinning bit of bar.
23 April 2017 at 16:40 #294610
John Reese
Participant
@johnreese12848
Most of the time the speed will be limited by the vibration caused by the eccentric weight of the boring head. Select the largest (diameter) boring tool. That limits the offset you need in the head. Maybe use a bar that takes HSS bits. Adjust the stickout of the bit to keep the bar pretty much on the center of rotation. That will allow you to run at higher speeds. You may even be able achieve recommended cutting speeds without the machine jumping across the shop.
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Boring head speed

Boring head speed

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