How to choose a keyless chuck with R8 spindle

MrWhoopee said:
Yes, go with the 3/4 straight shank, then shorten it.

View attachment 410481
Click to expand...
This is definitely the way to go, especially if you do a lot of work using your 3/4” collet.

I’ve got an eBay-special Albrecht on an R8 arbor and recently swapped to a 3/4” shank.

And now I think I’ll head down to the shop to shorten it a bit. Thanks @MrWhoopee!
 
Albrecht with integral shank are nice and short. This is something you will use more than most other things so I would definitely buy Albrecht. I recently bought a 5/8" capacity, this is great for tapping over M6 ( 1/4" ) it holds better. If you don't drill under 1/8" go for the larger size.
 
Problem with keyless and tapping is in reverse they let go.

We hand tap often in the mill as we do a lot of 8-32.

We drill hole then insert tap.

Turn by hand but first you use the spindle brake to hold spindle then tighten chuck with a good grip and turn.

When turning in reverse try to grab the fixed part of the chuck.

Sent from my SM-G781V using Tapatalk
 
Asm109 said:
I would buy one with a straight shank. .5 or .75 inch diameter.
Two reasons. You can swap it in and out with a lot less headroom on the mill than an integral R8 shank.
Second, keyless chucks can self tighten when drilling large holes or if there is a shock like when you break through. The can get so tight you need a strap wrench to loosen.
I would rather have a straight shank with a chance to slip in a collet and avoid that scenario.
Click to expand...
I was under the impression that slippage in a collet was bad for both the collet and the shank. Am I misinformed or did I just dream it? Or both? :)

Tom
 
I'll add this . The largest drill you'll use is I'm sure are S&D drills . A 400 - 500 buck Albrecht chuck is not the tool to run these drills . It is a precision drill chuck . You can get a 3/4" keyed Jacobs ( not SBB ) for $30 bucks and blow the hole thru whatever you're making . You always step out the hole anyways . If you like a good keyless , keep it good . Buy both an Albrecht and a beater chuck for the grunt work . JMO , your mileage may vary as always . :)
 
higgite said:
I was under the impression that slippage in a collet was bad for both the collet and the shank. Am I misinformed or did I just dream it? Or both? :)

Tom
Click to expand...
That's true, the shanks are soft and will score just like drill bits. The other problems are with straight shanks are that they locate on a Jacobs taper which if knocked can send the chuck out of true. Also they are only quicker to change if the appropriate collet is already in the spindle and the table is close to the spindle nose. I would stick to integral shanks for durability & longevity.
 
Once again, I must be the odd man out. I have about 2 dozen different size chucks for the lathes and mills. Of that number only 2 are keyless. Both are Albrecht. One was purchased new and the other came with one of the lathes.

The keyless ones are by far the least used. As mentioned, they tend to overtighten when drilling tough material, and loosen when reversing. I do a fair amount of tapping and they tend to make the process more cumbersome than necessary. I prefer the older "made in the USA" Jacobs super chucks. They're often found used on eBay for decent prices, and can be rebuilt if necessary.

Be careful if you go that route. The older Jacobs chucks have the logo and other information engraved in the chuck not printed on it.

Here's an example of an older one. Note the size and other information are engraved in the parts:
www.ebay.com

Jacobs #20N ball bearing super chuck, sleeve & body | eBay

Find many great new & used options and get the best deals for Jacobs #20N ball bearing super chuck, sleeve & body at the best online prices at eBay! Free shipping for many products!
www.ebay.com

Here's an example of a newer model. This chuck was probably made in China and is no where near the quality of the older ones. Note the information is printed on the body:
www.ebay.com

Jacobs Model 14N 1/2" x 3JT Super Ball Bearing Keyed Drill Chuck- TIR .003" | eBay

14N 0.040" 0.500" 3JT K3 3.88" 2.97" 2.44". For more than 100 years, superior grip and accuracy have made Jacobs the industry leader, with Jacobs technology applied to everything from sophisticated CNC machining centers to cordless portable drills.
www.ebay.com
 
I bought a China made 14N about a year ago as a comparison to my older chucks , and I also have more than a few dozen . I really saw no difference in quality . Other than not saying Made in Hartford on the chuck , it ran true and looked good . It was still expensive also . I still feel a used USA made chuck would be better though , but that's just me . I try to buy Made in USA products if possible .
 
Oh boy. Thanks everyone for all the suggestions. As a friend of mine used to say, "I think, therefore I am confused."
One good thing about these forums is that when I ask a question, the responses make me slow down and try to think. I thought that I wanted a keyless chuck because it would be quicker and easier to change bits, and that may be so. However, there are lots of other considerations. So for the time being, I'm going to keep scanning the internet to look at options. The Precision Matthews might be a good way to go for drilling small up to 1/2". But sounds like if I need to drill bigger, I might want to stick with keyed. I don't tap using the chuck. I make tap holders to fit into collets.
One thing for sure is that I don't want something that will be an irritation instead of a help. I bought a Dewalt cordless drill a while back that drives me nuts because the chuck doesn't loosen easily. Often I have to tighten it before I can loosen it. Makes no sense.
 
You must log in or register to reply here.
Back
Top