Drilling attachment tip?

[caseback]

The drilling attachment I got with my recent new to me 6mm Wolf & Jahn lathe works with these classic spade-type drills, but is not big enough to hold the 3,17mm shanks of the carbide drills I also have.

Online I found ER collet holders with cylindrical extended shanks. There are also versions available that hold ER8 collets and have a 6mm shank. Combined with a 7mm OD, 6mm ID brass tube, I now have something that works. Turning it doesn't show any wobble under my microscope, so I guess it is accurate enough.

[Neverenoughwatches]

I take it Case.... you just manually feed the drill bit by turning the 6mm shaft through the brass sleeve ? The tailstock on my  8mm WJ is identical with a 7mm aperture that takes the standard sleeve for the WJ drill feed  ...but same as yours it only holds the old pivot drills, think I'll go your way ...the freehand drilling was a little risky. Did you say Aliexpress for the ER holder ?

[caseback]

6 minutes ago, Neverenoughwatches said:

I take it Case.... you just manually feed the drill bit by turning the 6mm shaft through the brass sleeve ? The tailstock on my  8mm WJ is identical with a 7mm aperture that takes the standard sleeve for the WJ drill feed  ...but same as yours it only holds the old pivot drills, think I'll go your way ...the freehand drilling was a little risky. Did you say Aliexpress for the ER holder ?

Yep Aliexpress. The 6mm shaft now slides and rotates freely in the brass sleeve.

It shouldn't be too difficult to make and attach some kind of lever thingy like the original WJ drilling attachment has.

Just a simple knob should also work fine.

[Neverenoughwatches]

3 hours ago, caseback said:

Yep Aliexpress. The 6mm shaft now slides and rotates freely in the brass sleeve.

It shouldn't be too difficult to make and attach some kind of lever thingy like the original WJ drilling attachment has.

Just a simple knob should also work fine.

I think the sliding collet holder works just fine Cees.