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Drill chuck

#1
So what is the correct way to measure a drill chuck taper?
I have an older PA drill press and can find nothing in the manual about what size taper it has.
I hate keyed chucks and would love to change to keyless but the measurements I have taken don't appear to match with anything.
Skinny end and fat end? Is it that simple?
 

Everett

Active Member
#4
Are you referring to the taper going into the quill socket (drill press side) or going into the back of the chuck (chuck side)? Reason I ask is that often the drill chucks go onto an arbor that has a Morse taper on the drill side and a Jacobs taper on the chuck side. Last chuck I bought for the lathe required that I get an arbor as well at the same time.
 

Bofobo

Well-Known Member
#5
The arbour may be integral, with the chuck being the only removable piece, if so its likely a jacobs taper and some wedge blocks will make quick work of that. Mrpete222 has some videos on some of his tiny drill presses and changing the chucks
 
#6
The chuck taper should be marked on the chuck some where.

What size press is it? Current 8" - 16" PA presses and press chucks state B16.
 
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#7
Thanks for the input everyone. This is for the female end of the chuck. YYCHobbyMachinist was right, it's marked J3 right on the chuck.
I had no idea these things were that expensive:(. I don't think I paid that much for the whole machine 15 years ago.
I can put up with my keyed chuck for a while yet.
I don't need that kind of precision for the putzing around I do.
 
#8
Thanks for the input everyone. This is for the female end of the chuck. YYCHobbyMachinist was right, it's marked J3 right on the chuck.
I had no idea these things were that expensive:(. I don't think I paid that much for the whole machine 15 years ago.
I can put up with my keyed chuck for a while yet.
I don't need that kind of precision for the putzing around I do.
I got some really good deals on banggood.com. Most of it has been decent quality, some really good, some crap. The keyless drill chucks and arbors have been excellent
 

Dabbler

Well-Known Member
#10
I recently got some keyless chucks at KBC - that can't hold a drill worth anything. I've used my Jacobs' keyed chucks for 40 years, and they still hold like new. Now I have tow boat anchors as well.

You really are better off.
 
#11
I recently got some keyless chucks at KBC - that can't hold a drill worth anything. I've used my Jacobs' keyed chucks for 40 years, and they still hold like new. Now I have tow boat anchors as well.

You really are better off.
I pressed buy on one from Banggood yesterday so I guess I'll find out in a few weeks. The chuck on my drill press has always been glitchy but I wasn't too concerned about it. It has gotten real sticky lately and tends to bind when loosening the chuck.