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 Post subject: qb79 tank block info
PostPosted: Sun May 18, 2014 9:25 am 
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Joined: Wed Sep 14, 2005 8:47 pm
Posts: 1689
Location: 123 gun street Nova Scotia
im making a tank block and wondered if any one had a drawing of the measurements ? or even if you could give me the measurement of the bolts and distance the bolts are in from the end of the tube ?


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 Post subject: Re: qb79 tank block info
PostPosted: Sun May 18, 2014 9:45 am 
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Joined: Sat Nov 03, 2007 4:19 pm
Posts: 8979
Location: Coalmont BC
The tank block on a QB79 has the holes too close from the end of the tube, so unless you have to build a replacement one for a '79, I would suggest you move them further from the end.... Three 8-32 high tensile screws that are 1/2" from the end of the tube with the heads taking the load in the tube wall (the way a Disco valve is done) is far superior....

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!


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 Post subject: Re: qb79 tank block info
PostPosted: Sun May 18, 2014 10:12 am 
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Joined: Wed Sep 14, 2005 8:47 pm
Posts: 1689
Location: 123 gun street Nova Scotia
its for qb79 , so pretty much the same design must be built .
ive never seen one fail , not sure co2 would be enough under normal use to blow the regular bolts away . if it was for my self id just go straight to the valve and thread it on then run it at 2000-3000.


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