Canadian Airgun Forum

I need someone to convert a stock Crosman 2240 hammer into a 1-piece valve that I can used in my regulated PCP rifle.. It's quite a simple 4 step process, all that needs to be done is:

- valve stem seating hole..
- o-ring seat..
- exhaust port
- 3-retention screw hole

This job is so easy it should be fun to do and best of all it will make one good solid valve!

So what do you guys say?

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buy a lathe and a mill and tooling. come back with pics of the 'simple 4 step process' and I'll send you more business than you can handle.

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Walter

More like a 14 step process... I'm not sure you really know what goes into each manually run part.

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Daisy Red Ryder

turning a disco valve(like the one you have and the one I made)

Liberally estimated

chuck and dial-indicate if stock is to or near exact size 5 minutes
Face the end- 2 minute
turn the OD - 15-45minutes depending on weather it's an available size stock (fractal inch to 1/64th) and the tolerances required.
chamfer and deburr 1 minute
-Test fit if tube available
-sand/polish to final size if required - 15-45minutes
re-dial indicate - 5minutes
center-drill, pilot and drill the valve stem hole - 5-15minutes
counter drill and/or bore the intake port - 5-15minutes
turn the valve-seat - 5-minutes
turn the O-ring groove - 10minutes
de-burr - mild polishing - 5-20minutes
measure off the length the valve is to be, add .050" and part it off 15-30minutes
face the back - 1minute
chamfer the stem hole
chamfer the OD

---you have a valve blank... roughly 2-hours work..

measure the point for the bolt circle of the exhaust port and mounting screws - 15-30minutes
center-drill all holes, pilot and drill all holes in the drill press 30-45minutes
counter-bore the exhaust port and tap all mounting holes - 30minutes
-call it an hour.

3-hours total would be a rough quote, "professional off the books garage machine shop" rate $25/hr

and I count 19...

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- QB79 - CenterPoint 3-9x40 - 660fps - Zero'd @ 75yrds
- PCP2.0 - 480fps with "no" breech seal on the bolt on CO2

NBLongRanger sounds like he knows his stuff! So the work will cost me $75, excluding the material!?.. I can see why rsterne doesn't want to make me another valve or jezx!

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They are case-hardened and a b!tch to machine.... Good luck !!!

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal; Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!

Anyway the joke is on all of you! It's not possible to convert a 2240 hammer into a valve because there is not enought room to make the o-ring slot! The hammer pin hole is in the way..

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NB is letting you off light. I would charge you 3x that.

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Walter

You would charge me $75/hour?

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25bux is a backyard friend rate...for final product..
My cousin's a contract machinist/welder and charges $35 then the company tacks on like 50$ markup..

I don't have any credibility in my work here so, you're getting a damn good rate.

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- QB79 - CenterPoint 3-9x40 - 660fps - Zero'd @ 75yrds
- PCP2.0 - 480fps with "no" breech seal on the bolt on CO2

My regular job pays me double my machining rate here... 4x what I get for overtime... This is a hobby, I do it for the enjoyment of myself and others.
If I was in it for money, I would do more overtime and buy more stuff from scopesandammo.

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Daisy Red Ryder

Yeah but the problem with doing overtime is you got to pay more taxes back to the government at the end of the year! Not unless you put money aside for RRSP?

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Well what do you think a shop rate should be?

man, machine and building all need to be paid.

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Walter

if you put RRSP money away you have less spending money than you don't buy RRSPs. approx 70% more.

if you buy 5,000 RRSP to save taxes now you will have put away $3500 after tax dollars that therefore reduced your accessible income. Taxes paid on overtime averages out at year end so all is good.

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Walter

good example for ya, i had my mk1 barrel machined to my specs at a local machine shop. cost me 1 hour minimum, $80 plus tax. last week i got on a lathe and turned the same thing out in about a half hour. and i dont even know how to use a lathe i like my drill press and hack saws
on that note... something had to be built to perfection 'by hand' before the machine could be built