Eccentric Sleeve, For Drilling On Lathe...?

J

Jashley73

Titanium

Joined

Jan 24, 2013

Location

Louisville, KY

• Mar 8, 2021

• #1

For drilling on lathes... Does anyone know a maker of eccentric drill sleeves/bushings for use on lathes?

Example - My lathe has a 1.5" bore in the I.D. tool's block, and my drill has a 1.25" shank. So I need a reducing sleeve to hold the drill.

BUT - My center-height is off... So if someone makes an adjustable, eccentric sleeve, I could adjust for center-height...



And before someone asks - This is a plain 2-axis lathe, so no Y-axis can be used for offsetting.



Anyone know of anything...? Thanks

 

Finegrain

Diamond

Joined

Sep 6, 2007

Location

Seattle, Washington

• Mar 8, 2021

• #2

I make my own. I don’t know of any ready-made ones.

I know the right answer is “Get your lathe aligned.”

Regards.

Mike

 

G

gregormarwick

Diamond

Joined

Feb 7, 2007

Location

Aberdeen, UK

• Mar 8, 2021

• #3

Sandvik and Tungaloy both make them.

Here is Sandvik's one in the sizes you need: A416.2-LX31-38

 

Shop Supply Guru

Hot Rolled

Joined

May 3, 2016

Location

Ohio USA

• Mar 8, 2021

• #4

Allied Machine here's the link Allied - Item Detail
About $100 less than the Sandvik
I sell both brands FYI. Hit me up if you need a source.

 

G

gregormarwick

Diamond

Joined

Feb 7, 2007

Location

Aberdeen, UK

• Mar 8, 2021

• #5

Shop Supply Guru said:

Allied Machine here's the link Allied - Item Detail
About $100 less than the Sandvik
I sell both brands FYI. Hit me up if you need a source.

Click to expand...

I'll just point out that the allied sleeves have significantly less adjustment range range than most.

Presumably because they are designed specifically for dialling in zero, as opposed to others which are designed for offsetting.

They'll probably be ideal if you're only a few thou off in your turret, but if the error is more severe you'll probably need one of the Sandvik/Tungaloy type ones.

 

D

Dan from Oakland

Titanium

Joined

Sep 15, 2005

Location

Oakland, CA

• Mar 8, 2021

• #6

IF you have enough Z, a cheap solution is to find some old turret lathe tool holders that are adjustable. They take split bushings of various sizes to hold drills. Here is a typical one for $15.00 on e-bay. 1" Tool Holder with 1" Shank for Turret Lathe | eBay

 

D

DDoug

Diamond

Joined

Oct 18, 2005

Location

NW Pa

• Mar 8, 2021

• #7

Make a simple bushing on the lathe, keep the thru hole a little smaller than needed.

Mount on turret, take a common mill boring head, and clamp it in the chuck,
bore that bushing in place.

 

M

mjk

Titanium

Joined

Oct 20, 2005

Location

Wilmington DE USA

• Mar 8, 2021

• #8

Put an adjustable boring head in your chuck.

Load the block with a near sized blank 1.5 x 1.2(?) and bore a dead nuts hole where you need it.
If there's a way to register the custom bushing, you'll be able to remove and replace without re dialing in

 

M

mjk

Titanium

Joined

Oct 20, 2005

Location

Wilmington DE USA

• Mar 8, 2021

• #9

3 minutes to late, same train of thought as digger

 

D

DDoug

Diamond

Joined

Oct 18, 2005

Location

NW Pa

• Mar 8, 2021

• #10

mjk said:

3 minutes to late, same train of thought as digger

Click to expand...

Now THAT is a scary thought....very, very scary....

 

J

Jashley73

Titanium

Joined

Jan 24, 2013

Location

Louisville, KY

• Mar 9, 2021

• #11

I checked this machine's turret-radial alignemnt today, and it's straight.

I'm not going to futz about on this machine with boring holders/sleeves on-size, when it would require FAR more time. And have to be re-done when the machine gets crashed.

Much better to use the eccentric sleeves that are available. Thank you guys for lending the suggestions.

 

T

Triaged

Aluminum

Joined

Dec 31, 2016

• Mar 11, 2021

• #12

I've thought about one of these. Anyone use one? Is there something else better out there?

https://www.iscar.com/eCatalog/Family.aspx?fnum=2248&mapp=IT&app=94&GFSTYP=I

 

Mud

Diamond

Joined

May 20, 2002

Location

South Central PA

• Mar 11, 2021

• #13

Jashley73 said:

I checked this machine's turret-radial alignemnt today, and it's straight.

I'm not going to futz about on this machine with boring holders/sleeves on-size, when it would require FAR more time. And have to be re-done when the machine gets crashed.

Much better to use the eccentric sleeves that are available. Thank you guys for lending the suggestions.

Click to expand...

If the machine has the head mounted flat on the bed while the turret is on a slant. moving the head in/out will raise or lower the tool in relation to the spindle. The head needs to be aligned in 2 planes, not just straight with the turret travel. BTDT

 

N

Nmbmxer

Stainless

Joined

Jun 22, 2008

Location

VA

• Mar 11, 2021

• #14

I ran into this at home on an old QT10 I that the pots were a little low on. I cut up some 1.5" TG shafting about 3" long put spot faces that lined up with the grub screws on the tool pots. I'd just pop the drill or boring head it in a collet/3jaw and dial the turret to X0 and handled into the blank sleeve. Took the sleeve to the bandsaw and cut it most the way through and put it back in using the spot faces to line it up. Did the same thing for ER16 and 32 collet sticks and a couple with 3/4" holes for drill chucks. I had a dozen or so.