Holder or chuck for drill bits

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SBarnes
Posts: 7
Joined: Fri Jan 28, 2022 5:15 pm
Model of CNC Machine: Shapeoko Pro XXL

Holder or chuck for drill bits

Post by SBarnes »

Is there such a thing as a 1/4" round shank drill bit chuck for CNC routers?
I would like to use the available drill bits I have without having to purchace CNC drill bits!
Is this a bad idea for the occasional holes I need to drill?
Thanks!

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martin54
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Model of CNC Machine: Gerber System 48,Denford Triac Modified
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Re: Holder or chuck for drill bits

Post by martin54 »

A google search brings up quite a lot with a 1/2" straight shank, there may be 1/4" shank as well but didn't look to hard. No idea about using them with a CNC though :lol: :lol:
I don't tend to use the drill toolpath very much at all, most of the time I run a profile toolpath cutting inside the line with a spiral ramp. Works well but I am not machining lots of holes at the same time. Use an endmill that is larger than the radius of the hole & you won't be left with an island in the middle :lol: :lol: :lol:

Pete Cyr
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Re: Holder or chuck for drill bits

Post by Pete Cyr »

You can buy collet set that will have a range of sizes to allow using a typical drill bit.
However, standard drill bits don't usually do very well in a CNC spindle because of the speed the spindle rotates - the bits are often not stiff enough to provide a sharp concentric bore.

There are solid carbide bits that do well and have a 1/4" or 1/2" shank and are sized the same and a set of imperial or metric drill indexes. But I am not familiar with sets being sold they are typically sold individually and they are not inexpensive.

SBarnes
Posts: 7
Joined: Fri Jan 28, 2022 5:15 pm
Model of CNC Machine: Shapeoko Pro XXL

Re: Holder or chuck for drill bits

Post by SBarnes »

Thanks for the info!
I will get the 1/4" or 1/8" shank CNC drill bits in the sizes I need.

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ohiolyons
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Model of CNC Machine: Laguna IQ HHC, 3HP
Location: Kettering, Ohio

Re: Holder or chuck for drill bits

Post by ohiolyons »

I get mine from Precisebits.
I have their 1/16", 1/8" and 1/4" bits on 1/8" shanks.

Made in the USA.

When you have questions you are talking to the President of Precisebits.
Their website has loads of data too.
Top notch!
John
CNC in Kettering, Ohio

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