Albrecht Chuck

Cutting it off will do nothing to gain threads. If the drawbar is indeed bottoming out, then a spacer is the easy way out. Seen them on drawbars many times. It's possible your drawbar is just too long. How much excess thread do you have that extends past the threaded portion of your collets? If 1/4" or so, cut off the drawbar and call it good. If it does extend past the threads in your collets, you are shortchanging yourself on how much end mill shank you can swallow in the collet anyway.
 
That looks like an integral shank chuck to me; they do not have a removable collar. If you push the arbor in and it seats, then the issue is that the drawbar is too long. You can cut the end of the arbor and the bar will still be too long and there will still be slack. Most drawbars thread into the R8 collet way more than is needed for maximum strength anyway so cutting of 1/4" off the end of the drawbar should not be a big thing.

Well, that's what I think, anyway! :)

Edit: Ah, Tony, great minds think alike!
 
Place hands in pocket...

Consider placing a large bolt or 1/2 round stock in a lathe.

Next place chuck on stock as if loading it into the chuck.

Use tail stock to support end of arbor.

Now use lathe to cut off end of arbor.

Remove hands from pocket as you should be past the duh moment where you slap your forehead.

Sent from my SAMSUNG-SGH-I337Z using Tapatalk
 
thanks guys

I will:

1. push the shank in without the drawbar in to see if it fits
2. assuming it does, i will start measuring and photographing the drawbar and circle back

the set up currently includes a spacer ... so maybe the answer is another ... or shortening the drawbar

with your assistance we'll figure it out

thanks!

PS: Will, that albrecht with the integrated r8 is a thing of beauty - to me, it seems like the guy never used it...like new condition - i agree that it will be a shame to hack it up...i am hopeful we can avoid this
 
tq60 said:
Place hands in pocket...

Consider placing a large bolt or 1/2 round stock in a lathe.

Next place chuck on stock as if loading it into the chuck.

Use tail stock to support end of arbor.

Now use lathe to cut off end of arbor.

Remove hands from pocket as you should be past the duh moment where you slap your forehead.

Sent from my SAMSUNG-SGH-I337Z using Tapatalk
Click to expand...

TQ: from what others are saying, shortening the arbor will not fix the problem?? this actually confuses me because the r8 collets that fit are shorter...so to me, you get to the bottom (top?) of the collet quicker and it is therefore tight by virtue of being shorter...but i am a newbie and greater minds disagree...
 
Last edited:
Since you say your other R8 tooling is shorter compared to the Albrecht & that your mill spindle was reground to convert it to R8, I think the very first thing to check is #1 in your post above, check if the Albrecht will actually fully seat in the spindle. Maybe when it was modified they didn't leave enough clearance for longer length arbors.
 
bingo

suspense was killing me so i went to garage and checked...it will not seat fully into the spindle

maybe there were limitations in the original spindle - i'll call them tomorrow and find out

i guess the only way to use this would be to machine it down a bit

by the way...why aren't all r8's the same?
 
I think your issue is related to the conversion from B & S 9 to R8. First, count the number of threads the drawbar goes into the collet. It does not need more than about 3/4" of thread engagement to be as strong as the drawbar is, and we certainly do not tighten collets down that tight anyway. Perhaps cutting the drawbar off will cure your issue. A spacer would be a good test to confirm that it would fix it.
 
thanks Bob

actually, i took the draw bar out and tried to hand fit the arbor, the space inside the spindle is not deep enough...the arbor bottoms out before becoming hand tight....

given that, i think the only first step is to shorten the arbor .... maybe at that point the draw bar also needs to be shortened....i don't know
 
Flyrod said:
thanks Bob

actually, i took the draw bar out and tried to hand fit the arbor, the space inside the spindle is not deep enough...the arbor bottoms out before becoming hand tight....

given that, i think the only first step is to shorten the arbor .... maybe at that point the draw bar also needs to be shortened....i don't know
Click to expand...
Sounds like you should first measure the arbor on the Albrecht chuck to see if it conforms to the standards for R8 tooling. If it does, then send the spindle back to Wells-Index to do it right. If the Albrecht shank checks out too long, send the chuck back to Albrecht and have them shorten it to specs or replace it or give you your money back. An R8 tool needs to fit in a R8 spindle without hacking on it.
 
You must log in or register to reply here.
Back
Top