Crosman 111 bulk filling CO2

[--ped--]

qb 78 uses a metric 22x1 thread and the 600 uses a 7/8x20 I think

[DT Fletcher]

qb 78 uses a metric 22x1 thread and the 600 uses a 7/8x20 I think

Yes, QB guns are entirely metric. The 160 is entirely SAE.

MAC-1 tried to get them to go SAE but that just wasn't going to happen.

[Benelli B76]

qb 78 uses a metric 22x1 thread and the 600 uses a 7/8x20 I think

Yes, the Crosman is different, Crosman made a bulk fill adaptor to fit inside their standard cap (see pics). You can remove the circlip that is inside the cap and remove the piercer and fit the required valve. I have a range of adaptors for different CO2 shooters.

Baz

[greenwayjames]

Yes, the Crosman is different, Crosman made a bulk fill adaptor to fit inside their standard cap (see pics). You can remove the circlip that is inside the cap and remove the piercer and fit the required valve. I have a range of adaptors for different CO2 shooters.

Baz

I was told some time ago by someone that knows the fact that when he made and modified CO2 pistols for customers over the pond the commonly used threads were not parallel but were in fact TAPER. May be I got it wrong but thought to mention it

[gingernut]

I have a Crosman 150 with a bulk fill cap.
But it works fine with co2 cartridges too.

I bought my FWB co2 pistol from Baz.

To fill it you cool the cylinder in the freezer or let a bit of gas off to cool it.
Then screw on the cylinder adapter and attach to the extinguisher -press handle to fill.
Then weigh it to check full.
If it is overfilled the gun won’t work until you release a bit of gas with the decanter screw.

Baz fills it for me which is very easy!
I will do it myself next time!

The upside is that you get a huge amount of shoots from the slim FWB cylinder and it is an excellent gun.
You also don’t need an expensive air tank.

[--ped--]

a bulkfill head is something I've been planning on making for my 600 and maybe a tube extention and a longer barrel,remember seeing a nice one on another airgun blog

[Benelli B76]

a bulkfill head is something I've been planning on making for my 600 and maybe a tube extention and a longer barrel,remember seeing a nice one on another airgun blog

Lawrie Amatruda sold this one last week....

[--ped--]

that's very nice and I think I've seen that somewhere else or one very like it
beauty is that the mods can be done with no mods to the base 600

[Benelli B76]

that's very nice and I think I've seen that somewhere else or one very like it
beauty is that the mods can be done with no mods to the base 600

Lawrie has another different one he built himself.

Baz

[DT Fletcher]

I was told some time ago by someone that knows the fact that when he made and modified CO2 pistols for customers over the pond the commonly used threads were not parallel but were in fact TAPER. May be I got it wrong but thought to mention it

Crosman used the taper threading. Which goes against typical engineering since the non-tapered (parallel) threading would be called for. The trick is that tapered threading doesn't start tapering until after the point where the nozzle is secured on the gun. An amateur engineer started this whole tapered vs non-tapered issue some years ago. However, he never bothered to look at the actual published specifications and the application. So, in fact, either tapered or non-tapered pipe threading works in the standard Crosman bulk fill application.

[greenwayjames]

Crosman used the taper threading. Which goes against typical engineering since the non-tapered (parallel) threading would be called for. The trick is that tapered threading doesn't start tapering until after the point where the nozzle is secured on the gun. An amateur engineer started this whole tapered vs non-tapered issue some years ago. However, he never bothered to look at the actual published specifications and the application. So, in fact, either tapered or non-tapered pipe threading works in the standard Crosman bulk fill application.

Thank you for confirming the amber liquid hasnt done its worst to my memory just yet