Israeli 98 Mauser .22 Conversion Bolt.

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tiriaq

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Acquired one of the Israeli .22 Mauser training rifles, missing the bolt. These used a standard bolt modified for rimfire. I have a bolt from an Israeli 7.92mm rifle that I wish to convert. Would like to get photos of the front end of the bolt from one of these rifles so that I can see how they were converted. Easier to copy that to reinvent the wheel.
Thanks.
 
Honestly, try finding a bolt - there is a ton of machining on the bolt body, plus extractors will need to be made, the front firing pin is a two-piece abomination while the rear is modified from a standard 98 pin. The only parts not modified are the cocking piece, bolt shroud and safety.
 
A member has been advertising for one of these bolts for some time without success.
I'm looking at this as a project - and have the time to have a go at it. Doesn't have to be practical.
So far, I gather that the bolt will have to be annealed, and the face machined flat, with a counterbore for the case head, the firing pin hole being plugged. Slots milled for the twin extractors, with provisions for pivot pins and springs; an offset firing pin, driven by the cut-off original. The centerfire extractor would become a bolt guide.
 
From the 'net search I've done there appear to be a couple of versions of these rifles. One pattern has a block screwed to the receiver ring that seems to contact the right side of the bolt nose, the other doesn't. Mine doesn't have the block.
Also note that the centerfire extractor and its collar are removed.
There is another training rifle that is more sophisticated in its conversion. A complete new bolthead is fitted; I expect locking is accomplished using the safety lug. The barrel face is brought further back, so the receiver ring doesn't have to be cut away.
 
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The FN purpose built 98k 22 has its own bolt system. I have bought a lot of the parts from Gunparts Corp They only made
a few thousand of them. So, there aren't that many guns out there to get parts from.
The Remington conversion 's were very limited All the bolts have to be fitted
 
They were mine, 6 of them. I sold them after having them for 20+ year's.
I never did find any spare bolt's, and the one's I did have looked to have an unfinished face that was machined to take 22's
 
I bought it as a project, looking at the challenge of altering the Israeli 7.92 bolt that I had. Things happen, but I wasn't expecting to turn up a replacement bolt.
 
I have one of the Rem conversions. Bolts are very rough and purpose built for indivisual rifles. I would be surprised if you could ever find a bolt.
 
Yes. That is why I took this on as a project, with the intent of altering a bolt which I already had.
I have previously converted No. 1 and No. 4 rifles to .22, .45 and 7.62x39, Carcano to 7.62x39, and thought that this would be an interesting challenge.
 
I was involved in importing them and various other 22's SIR sold them I found that one had to function test this 98 conversion.
There was spare bolts and parts for them. I don't remember the name of the dealer who purchased them.
 
A member has kindly offered me an incomplete bolt. I can make the missing parts. Fortunately I had not annealed my Israeli 7.92 bolt and started the machining.
Interestingly, the barrel is marked for a Remington 521T, .22S, L, and LR. The way in which it was fitted to the receiver is creative. The .22 barrel is pinned to a bushing. Maybe the bushing was made from the original barrel. The military rear sight is installed on a collar, the .22 barrel being too small in diameter.
The bore in this rifle is a bit ho-hum. Once I get the bolt working, I'll test it for accuracy, and if lacking, I will dip into my tiny hoard of liners. I have a NOS 513T barrel that I may consider installing, but it is larger in diameter, and would require lathe work to fit the forend and bands. Using the liner would be easier and faster and performance should be satisfactory. Also I have other plans for the 513T barrel.
 
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Looks a lot better now.

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The bolt fits, cocks, and clicks.
Now I need to make the .22 firing pin, both extractors with pins and springs.
 

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Just spent 2 hours in the shop. Now I have a functional firing pin, ready for heat treatment. Based on examination of fired cases, headspace is fine. Fired cases don't stick. Extractors are next. I have some blades from a scrapped dado set that should yield suitable steel.

Proof of life:

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More time in the shop. The bolt now has extractors. This is the dado blade I cut the extractors from. Grooved, broke a piece off, heated it until I could saw and file it. Exactly the right thickness. Used a couple of pieces of drill shank for the pivot pins, and cut pieces from a spring I dug out of the junk bin.
Firing pin arrangement is interesting. Most firing pins have a spring to retract them; this design has a spring that keeps the pin gently pushed forward. There is a good reason to do it this way, but it is different. Wouldn't want the pin to be stuck forward when briskly closing the bolt.

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Finicky adjustment. Without the long extractor as a guide, the bolt is really wobbly. Lack of precise positioning. A variation has a piece screwed to the receiver ring, which I think aids in positioning the bolt nose. And, the bolt head turns 90 degrees as the bolt opens. The later FN version extended the barrel back into the receiver, and used a shorter bolt with a non-rotating bolt head.
 

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