Trunion with a Twist...

Ox · Jul 8, 2014

Got this in my email, thought it interesting.

New from Trunniontable.com
The Stallion Hybrid

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Think Snow Eh!
Ox

Limy Sami · Jul 8, 2014

I like it, on short run jobbing work it could save a lot of re-setting time.

Edster · Jul 8, 2014

+1

Great idea the chuck on the support end.

DDoug · Jul 8, 2014

I designed a special clamping fixture (hyd pull down cylinders)
for a Haas VF-6 with a very similar indexer/tailstock.

I used up a bunch of the available space UNDER the centerline
that I could to make a welded box section of 1/2" plate, IIRC
the length between indexer and tailstock was 45" long.

10" wide box about 8" deep, made from 1/2" thick plate, press broke
Into a "u" shape.

With a 1" thick top, and 1" thick ends.

The O.P. pic looks very handy other than the weakness I see
under the vice, changing to a box section would help greatly.
,
Both torsional stiffness, as well as simple bending deflection.

allloutmx · Jul 8, 2014

Who makes it? :drool5:

Ox · Jul 8, 2014

Sorry - I thought their address was in the pic, but I edited it in.

One other thing that is interesting is that there is a brake in the tailstock end. :scratchchin:

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Think Snow Eh!
Ox

DDoug · Jul 8, 2014

Brake in the tail bearing....would preclude use as a true 4th axis ?
I.e. no contouring, just positioning between cuts ?

rlockwood · Jul 8, 2014

digger doug said:
Brake in the tail bearing....would preclude use as a true 4th axis ?
I.e. no contouring, just positioning between cuts ?

I can't see why that would be the case; there's a brake in most 4th axis units, typically a relay fires the brake and disables the drive amp. It's used only in situations where you otherwise would overcome the drive motor, but it doesn't prevent you from ignoring its existence..

ARB · Jul 8, 2014

I like it...
Mount the hole nine on a ground plate to slip in and out as needed... Nice...

Ox · Jul 8, 2014

digger doug said:
Brake in the tail bearing....would preclude use as a true 4th axis ?
I.e. no contouring, just positioning between cuts ?

Really - that aux brake on the end would help to not get the wrap up stresses through the long trunion as you elude to in your previous post about the box section. Of course you wouldn't use it any more than you would the one in the table. And I would like to think that it uses the same air supply to actuate it as the indexer it'self does. Just piggy-back it in.

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Think Snow Eh!
Ox

IAMATT · Jul 8, 2014

Why the cuts in the vise though?

steve_p · Jul 8, 2014

IAMATT said:
Why the cuts in the vise though?

Looks like they had to trim the d688 mounting ears back a bit, then recut the slots deeper.
The cuts on the bed look like they are for bolt/tool clearance.

Jashley73 · Jul 8, 2014

Ox, we have (3) nikken 4th indexers, with brakes in the indexer and the tailstock. They are plumbed together, (parallel for you electrical folk,) and of course, you can ignore their function if you'd like...

The trunnion above looks neat. I'm kind of struggling to find a reasonable use for it though, as it looks like if would eat up a lot of useable space. Especially the chuck on the end... Maybe if you have a BIG machine table... Looks cool, and well made though.

Ox · Jul 8, 2014

IAMATT said:
Why the cuts in the vise though?

Are you talking about the divots above the bolt holes?

I think that is OEM Kurt.
No reason to narrow it up on the trunnion plate from my point of view.

???

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Think Snow Eh!
Ox

Edster · Jul 8, 2014

IAMATT said:
Why the cuts in the vise though?

Looks like the new HD690 vise.

HD690 Vise - Kurt Workholding

Steelphil · Jul 8, 2014

Looks like a nightmare to move the jaw the full stroke..

Cole2534 · Jul 8, 2014

Steelphil said:
Looks like a nightmare to move the jaw the full stroke..

Ya, probably, but how often do you do that?

DDoug · Jul 9, 2014

I just made the fixturing, didn't know how the indexer worked.

Now I do, thanks for that info.

Can you run with the brake off, and do contouring ?

I do remember, that the indexer had a large thru hole, might balance out
things better on table to put chuck on opposite end of indexer.

Rstewart · Jul 9, 2014

Edster said:
Looks like the new HD690 vise.

HD690 Vise - Kurt Workholding

I Want some of those!! Much better thought out design than my 688's

Philabuster · Jul 9, 2014

Rstewart said:
I Want some of those!! Much better thought out design than my 688's

I agree the new Kurts are a better design than the 688s, but I would rather save up a little more coin and buy a kick ass Orange Vise instead: :drool5:

Orange Vise Company - Quick-Change CNC Machine Vises

Trunion with a Twist...

Diamond

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Titanium

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Stainless

Titanium

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Stainless

Aluminum

Titanium

Diamond

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Aluminum

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