Narex VHU 3 1/8" Boring Head Mods

[thestelster]

Well, on a previous post, I mentioned that I purchased at auction this Narex VHU Boring/facing head. Much to my disappointment the arbour is integral to the body and not interchangeable with other arbours. The newer units have that capability, but I guess the older units do not. This unit is an MT5. My milling machine uses NMTB #40.

So here we go.... again...

The plan is to modify the existing unit to accept a shell mill adapter.

 

[thestelster]

I'm at least fortunate that my lathe spindle bore is MT5. I put the boring head in the spindle and proceeded to bore for the shell mill adapter bolt. Of course this stuff is hard so carbide tooling only.

 

[thestelster]

I don't know about you guys, but I get scared shirtless when using an angle grinder with cut-off wheels to cut thick hardened stuff.

 

[thestelster]

Ok, now the scary part!

14" face plate. I'll indicate and tweak everything tomorrow. I indicated the face plate and its about 1/2 thou' across the face and less TIR.

 

[whydontu]

You're way braver than I am. Looks good!

 

[PeterT]

Ok, now the scary part!

My toes are curling inward & its not even spinning yet. Proceed carefully. Other than some friction there is nothing keeping the support blocks from wanting to fly outward. Can you not mount it using 4J chuck & some packing?

 

[jorogi]

You're way braver than I am. Looks good!

My thoughts exactly. Of course the rewards of success are big.

 

[thestelster]

You know, just looking at my set up. It's probably doable, but there's a lot of things that can go wrong. And you know that guy Murphy and his silly laws!!.

Maybe I will use my 14" 4jaw instead.