Who surface grinds large ring Mausers to small ring & what is the approximate cost? Need to decide if I can justify it for a project spinning in my head.

D., Please give more detail on what you want done, to the barrel or the action?
Mike

quote:

Originally posted by D Humbarger:
Who surface grinds large ring Mausers to small ring & what is the approximate cost? Need to decide if I can justify it for a project spinning in my head.

...No brainer, been done lots of times...the KAR is a perfect example of a factory config...Pete Grisel blew up a couple Mausers (case load of bullsetye)...they seperated horizontally...about at the extractor slot...lose the weight somewhere else..

I have a M98 Turk with the large ring & small barrel threads.

quote:

Originally posted by D Humbarger:
I have a M98 Turk with the large ring & small barrel threads.

That would be gooder!

I have though about doing that with Turkish Mausers.

Not havening a surface grinder, I would put a mandrel through the bolt bore of the receiver between a horizontal rotary table and a dead center on the mill table.

I would be tempted to form something of a scope mount feature.

The problem is that Mausers get lighter at ~ $10/ ounce.

The first large ring to small ring conversion is going to pay very low wages at $10/ounce.

quote:

Originally posted by tnekkcc:
I have though about doing that with Turkish Mausers.

Not havening a surface grinder, I would put a mandrel through the bolt bore of the receiver between a horizontal rotary table and a dead center on the mill table.


I would be tempted to form something of a scope mount feature.

The problem is that Mausers get lighter at ~ $10/ ounce.

The first large ring to small ring conversion is going to pay very low wages at $10/ounce.

Like this?
-Don

quote:

Originally posted by D Humbarger:
I have a M98 Turk with the large ring & small barrel threads.

Look at the recess cut at the end of the barrel threads.....I wanted to do this as well and was cautioned about it.

quote:

Originally posted by vapodog:

quote:

Originally posted by D Humbarger:
I have a M98 Turk with the large ring & small barrel threads.

Look at the recess cut at the end of the barrel threads.....I wanted to do this as well and was cautioned about it.

Those are on k kale's not 03's. Though I've never mic'ed a k kale to see how deep they are. But I would check before going forward with one.
-Don

quote:

Those are on k kale's not 03's.

concurr....it was a K Kale from Ankara

All mausers have that thread relief cut. I gathered up the actions that i could find & took some measurements of the thread relief cut at the end of the threads. The measurements are as follows.

1909 Arg._____________1.110 ID
VZ/24 #1______________1.103 ID
VZ/24 #2______________1.103 ID
FN commercial_________1.110 ID
1908 DWM #1___________1.107 ID
1908 DWM #2___________1.117 ID

Turk K. Kale thread relief cut 1.000 ID

Large ring OD 1.410 (K. Kale)
Small ring OD about 1.300

Sooo you grind off about .110 from the K. Kale to bring the ring down to 1.300 & the relief cut ID is 1.000 that leaves .300. That is within .010 of what a large ring thickness is.
What do you guys think?

The area to stretch is about 14% smaller.
However it is still much greater area than the locking lugs which take the same load (force).

I don't know that I would do the project, but IF i did, i would certainly have it heat treated afterwards

quote:

Originally posted by jeffeosso:
I don't know that I would do the project, but IF i did, i would certainly have it heat treated afterwards

That's a give me, but why on earth wouldn't someone spend $75 for insurance on any project that the put that much time/money into.
-Don

If you PM Jim Wisner he may be able to give some advice. He has posted pictures of large ring actions that he ground on the sides but blended the radius to the top of the ring. It made a very nice profile and leaves the dimensions correct for standard 98 ring bases.

Creates an elegant ovate cross section.

That sound like a neat concept, if you find the pics can you post them here.
-Don

The late great Tom Burgess did many 1909 Peruvians with the ovalised front ring.

Trying to grind a large ring (even with SR thread) down to a small ring is potentially asking for problems. You MUST measure the thread relief cut. Most were made to standard LR specs with a few notable exceptions. Grinding those that were made to LR specs down will leave you with the same problems the early Kar's had, becoming takedown rifles.