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 Post subject: Re: .30 cal Disco Double
PostPosted: Sun Jun 30, 2013 12:25 pm 
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Joined: Sun Feb 13, 2011 10:44 pm
Posts: 160
I just did one with orings. ).406 groove diameter left 0.053" wall. I was okay with it but it's not awesome.

I'm with Walter. A class LC5 fit and 2 drops of Loctite Hydraulic sealant and we can forget we ever even thought of Orings.

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Sean


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 Post subject: Re: .30 cal Disco Double
PostPosted: Sun Jun 30, 2013 2:49 pm 
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Joined: Sun Jul 15, 2012 10:49 am
Posts: 6029
Location: Victoria, BC and Clarkston, WA
SMP wrote:
rrdstarr wrote:
Thanks Bob!
I bought and Archer breech in anticipation of having Shaun's .30 barrel. Will need to buy an air tube and trigger assembly and all the small bits too. That way I am not cannibalizing my QB79/AR2079 that I am transplanting/restocking.


Hi Rick
I just did an Archers breech mod and I found the only place with enough material for another setscrew was two picatanny slots back from the original screw. Not ideal but it was effective.


Sorry I misspelled your name Sean! I had a few Rum and Cokes but that time of morning! I like THE LC5 fit you mentioned too! I think only a machinist understands the nomenclature! Will have to look it up when I get back to work on Tuesday!

Does anyone know if Eric at ScopesandAmmo has spare parts for the QB78? Archer has a few, like the valve and the air tube, but I need a trigger group complete, unless someone knows of a drop-in replacement!

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-Rick
Pardini K10
Brocock Concept .22
3 Custom Crosman 2260
Benjamin Discovery .22 w/Joe Hickey stock!
Crosman 150 pistol .22
4 Crosman MK 1 pistol .22
Mrodair CP-1M .22 and .177


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 Post subject: Re: .30 cal Disco Double
PostPosted: Sun Jun 30, 2013 3:34 pm 
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Joined: Sun Feb 13, 2011 10:44 pm
Posts: 160
This is my understanding of the situation with Eric

He has a license agreement with IB to be the Canadian authorized distributor and repair facility. And as I understand it he can get Industry Brand anything. QB parts not a problem I know he has those a plenty in stock.

Lol...Guess I show explain that. An LC5 fit would be

Location Fit class 5
From the fit tables for 0.500"
Bore +0.0007 to -0.0000
Shaft -0.00025" to -0.00065"

Clearance 0.00135" to 0.00025 (No that's not a typo :lol: )

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 Post subject: Re: .30 cal Disco Double
PostPosted: Sun Jun 30, 2013 3:45 pm 
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Joined: Sun Jul 15, 2012 10:49 am
Posts: 6029
Location: Victoria, BC and Clarkston, WA
SMP wrote:
This is my understanding of the situation with Eric

He has a license agreement with IB to be the Canadian authorized distributor and repair facility. And as I understand it he can get Industry Brand anything. QB parts not a problem I know he has those a plenty in stock.

Lol...Guess I show explain that. An LC5 fit would be

Location Fit class 5
From the fit tables for 0.500"
Bore +0.0007 to -0.0000
Shaft -0.00025" to -0.00065"

Clearance 0.00135" to 0.00025 (No that's not a typo :lol: )


LOL! Sorry my crappy lathe can only accurately turn to .0004. That is 1/10th the thickness of a human hair or piece of notebook paper for you non-machinist! I can't imagine the price of a micrometer that measures in millionths! Think we'd have to have a lab at 68 degrees too! Our 40 year old deHavilland airplanes don't need that kind of precision! LOL!

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-Rick
Pardini K10
Brocock Concept .22
3 Custom Crosman 2260
Benjamin Discovery .22 w/Joe Hickey stock!
Crosman 150 pistol .22
4 Crosman MK 1 pistol .22
Mrodair CP-1M .22 and .177


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 Post subject: Re: .30 cal Disco Double
PostPosted: Sun Jun 30, 2013 4:11 pm 
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Joined: Tue Jun 03, 2008 5:46 pm
Posts: 2815
Location: Canada
In simple understandable terms...a squeak fit. .002" being a good sliding fit.

Al


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 Post subject: Re: .30 cal Disco Double
PostPosted: Sun Jun 30, 2013 5:00 pm 
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Joined: Sat Jan 12, 2013 6:08 pm
Posts: 117
After discussion with Shaun, I have gone for the class 5 fit and sealant with my new barrel.
Best I start on the valve and pressure tube :D


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 Post subject: Re: .30 cal Disco Double
PostPosted: Sun Jun 30, 2013 6:11 pm 
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Joined: Sun Feb 13, 2011 10:44 pm
Posts: 160
Quote:
Our 40 year old deHavilland airplanes don't need that kind of precision! LOL!


No probably not. But it's a good starting point for Airguns :D

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 Post subject: Re: .30 cal Disco Double
PostPosted: Tue Jul 02, 2013 3:05 pm 
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Joined: Sat Jan 12, 2013 6:08 pm
Posts: 117
Image


Bob, Did you use tool steel for the rear cocking shaft? If so, which spec please? Did you anneal it to allow the threads to be cut?


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 Post subject: Re: .30 cal Disco Double
PostPosted: Tue Jul 02, 2013 3:48 pm 
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Joined: Sat Nov 03, 2007 4:19 pm
Posts: 8978
Location: Coalmont BC
I used O1 drill rod for the cocking shaft.... The rod will be left in the anealed state.... It threaded fine....

Bob

_________________
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!


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 Post subject: Re: .30 cal Disco Double
PostPosted: Sat Jul 06, 2013 6:33 pm 
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Joined: Sat Jan 12, 2013 6:08 pm
Posts: 117
Bob,
Do you have a close up photo of the sear engage point on your new hammer please? I am using my new found lathe skills (very limited) and trying to work it out. I can machine the sear angle ok, but I cant see how your cylindrical striker uses the angle.
I would really appreciate another picture please.

Nathan


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 Post subject: Re: .30 cal Disco Double
PostPosted: Sat Jul 06, 2013 11:43 pm 
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Joined: Sat Nov 03, 2007 4:19 pm
Posts: 8978
Location: Coalmont BC
I don't have another photo, but the sear surface is a simple 22* taper (ie cone shaped, turned on the lathe), the same as that on a Crosman Disco or 22XX hammer....

Bob

_________________
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!


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 Post subject: Re: .30 cal Disco Double
PostPosted: Tue Jul 30, 2013 6:56 pm 
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Joined: Sat Jan 12, 2013 6:08 pm
Posts: 117
Bob,

Do you know when/if Lloyd is putting the modified mrod mags on the market soon?


Thanks.

nathan


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 Post subject: Re: .30 cal Disco Double
PostPosted: Tue Jul 30, 2013 7:34 pm 
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Joined: Sat Nov 03, 2007 4:19 pm
Posts: 8978
Location: Coalmont BC
They are done, and Sean and I have the ones we need.... I don't know what the retail situation is RE Lloyd, you would have to ask him directly.... Sean (SMP) may also know....

Bob

_________________
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!


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 Post subject: Re: .30 cal Disco Double
PostPosted: Fri Aug 02, 2013 3:01 pm 
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Joined: Sat Jan 12, 2013 6:08 pm
Posts: 117
rsterne wrote:
They are done, and Sean and I have the ones we need.... I don't know what the retail situation is RE Lloyd, you would have to ask him directly.... Sean (SMP) may also know....

Bob



I have tried Lloyd, with no answer. I guess the man is busy, or on his hols? Either way, no worrys!

Looking at your mags Bob, would they be easy to convert myself??

Nathan


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 Post subject: Re: .30 cal Disco Double
PostPosted: Fri Aug 02, 2013 4:58 pm 
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Joined: Sat Nov 03, 2007 4:19 pm
Posts: 8978
Location: Coalmont BC
No, the "star wheel" is completely different, it is a 7 shot because of the larger pellets, made on a CNC.... Lloyd is building a new house, be patient.... He might just be willing to sell you parts, can't hurt to ask....

Bob

_________________
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!


Top
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