Does a drop block HAVE to be pinned?

[stroo]

I purchased a Magnum Airpower drop block earlier this year and am getting ready to start the build.  I have a 2300 and a 2400 tube but leaning on the 2300 since the 2400's are no longer available.  I am not a machinist but have some rudimentary skills, mostly basic lathe work and am not confident in making the proper size/location for the drop block bolt.  I know safety wise it should be done but the bottle reg is set for 850 PSI, same as CO2 so I'm thinking the threads will be safe since that's the pressure the end cap was designed for.  I'm also using a Disco valve with only the bottom lock screw (stronger Magnum Airpower version).  I already have the same valve setup on a 2400 tube using a Disco fill adapter tethered to the same 850 PSI regd bottle and it's working perfectly.
I understand it will likely be loose and be able to swing around some but my concern is safety and any unforeseen issues not using the lock screw.  What say the knowledgeable?

[subscriber]

Rick,

Pressure regs have been known to fail.  So, downstream components should be designed for full air tank pressure, or a burst disc should be installed just after the regulator, rated for a little over the reg pressure.  That is, unless you can convince yourself that the threads etc can take the full pressure with a suitable factor of safety.  Or, you have the system hyrdo tested to an appropriate pressure.

If any part of the system is not designed for air tank pressure and you hydro test it for 3X your target pressure, then it is likely that you will damage or destroy one of more parts. 

Hopefully come of the skilled folks that have made or modified drop block systems will chime in.  In the meantime, this search string should point to mention of drop blocks used on the GTA forum:  www.google.com/search?q=site%3Agatewaytoairguns.org+drop+block

Here is a sample thread from that search string:  https://www.gatewaytoairguns.org/GTA/index.php?topic=186333.0

[ev-in-az]

I purchased a Magnum Airpower drop block earlier this year and am getting ready to start the build.  I have a 2300 and a 2400 tube but leaning on the 2300 since the 2400's are no longer available.  I am not a machinist but have some rudimentary skills, mostly basic lathe work and am not confident in making the proper size/location for the drop block bolt.  I know safety wise it should be done but the bottle reg is set for 850 PSI, same as CO2 so I'm thinking the threads will be safe since that's the pressure the end cap was designed for.  I'm also using a Disco valve with only the bottom lock screw (stronger Magnum Airpower version).  I already have the same valve setup on a 2400 tube using a Disco fill adapter tethered to the same 850 PSI regd bottle and it's working perfectly.
I understand it will likely be loose and be able to swing around some but my concern is safety and any unforeseen issues not using the lock screw.  What say the knowledgeable?

The 2250 tube is available, same dimensions as the 2400. I just ordered one two weeks ago.

[stroo]

Thanks for the info gents!

I'm using the little First Strike bottles posted in the Bargain gate, they do have burst discs on both side, 1.8k and 7.5k to be precise.  I'll do some research with the links subscriber posted (thanks again!) and determine if I want to chance the "shortcut".

[stroo]

I purchased a Magnum Airpower drop block earlier this year and am getting ready to start the build.  I have a 2300 and a 2400 tube but leaning on the 2300 since the 2400's are no longer available.  I am not a machinist but have some rudimentary skills, mostly basic lathe work and am not confident in making the proper size/location for the drop block bolt.  I know safety wise it should be done but the bottle reg is set for 850 PSI, same as CO2 so I'm thinking the threads will be safe since that's the pressure the end cap was designed for.  I'm also using a Disco valve with only the bottom lock screw (stronger Magnum Airpower version).  I already have the same valve setup on a 2400 tube using a Disco fill adapter tethered to the same 850 PSI regd bottle and it's working perfectly.
I understand it will likely be loose and be able to swing around some but my concern is safety and any unforeseen issues not using the lock screw.  What say the knowledgeable?

The 2250 tube is available, same dimensions as the 2400. I just ordered one two weeks ago.

Figures, I just put in another Crosman order last week.  Is that part #2250-009 that they had in stock?  And what was the price if you don't mind mentioning it?

[Gippeto]

Seems like the sort of question you would ask of the fellow who makes the part.

https://magnumairpower.com/ols/products/tank-block-for-crosman-2240-2300kt-2250-2400kt-2260

[rsterne]

Yep, follow the instructions from Magnum....

Bob

[stroo]

Duh!     His instructions say the threads (with thread locker) will handle 1400 PSI and says to use the anchor if going higher.  I won't be going even close to that so I'll just use Loctite 242.  Makes me feel better about my other setup using a fill adapter too.

Thanks fellas!