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Decent R8 drill chuck for mini-mill?

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PHPaul

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#1
The chuck that came with my used mill is...uh..."less than optimal". That sounds better than execrable, right?

The key doesn't fit worth a hoot and so far it's been impossible to get the jaws truly tight. I was taught to snug it up and then go around to all the key holes (three in this case) and tighten it in steps. I can do this until the cows come home and all it takes is a dirty look for it to come loose.

I'd like to upgrade to a better chuck without breaking the bank. Let's call the upper end of the budget $100.

Any suggestions?
 

Eddyde

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#3
Better to get a chuck with a straight shank (say ½") instead of R-8. That way you can use the same collet for the chuck and the tool. It will also give you more vertical clearance to make changing out the chuck easier. I have both styles and almost never use the R-8 shank.
 

Silverbullet

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#4
I to say straight shank and collet , buy a used Jacob 14n super chuck , about $50 if need be clean it and lube is about all they need. Parts kits can be had too. And you still would be under a $100. Just my favorite chucks ball bearing smooth . Albrecht chuck plan on a hundred used but real good also. Just don't use a larger drill then they max at , they'll self tighten and be a bugger to loosen.
 

tweinke

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#5
QMT has some chucks on there web site that I think I read are pretty decent also.
 

Silverbullet

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#6
Randc seller on eBay has a nice 14n with 5/8 straight arbor no bids start at $6.99 with $9.00 ship. , good dealer on there too. 5 days left on bidding
 

mksj

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#7
If you need accuracy, then I prefer an integrated chuck an arbor, with a collet you are compounding the run out. I several different integrated chucks, some keyed and some keyless. The issue with the keyless over tightening seems to be a problem with some chucks others I have not had any issues with on both my knee mill and lathe. I had a Glacern and did have problems with over tightening, but no issues with the Shar's above or the Z-Live which is similar. The Shar's is a bit nicer. These are both what is called CNC precision chucks. They are only for right hand turning. You can pick-up and older used Jacobs 14N super chuck and get an R8 arbor, but these can be good or bad, and the prices are just going up. The newer Jacob's chucks I have not really heard anything positive about them. My go to integrated R8 chucks are Llambrich which work great but beyond the budget. I would look at the Shar's otherwise a used Jacobs 14N and get a R8 arbor.

http://zlivecenter.com/drill-chuck-and-arbor-adapter/drill-chuck/09905BR813
 

PHPaul

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#9
Thanks all, that gives me some options to look at.
 

coffmajt

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#10
Just keep in mind that if you are power tapping with a chuck it should be a key type, because the Albrecht will loosen when reversed to back out of the hole. I use both types and prefer the Albrecht for drilling and reaming == Jack
 
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