A picture of the updated Diana piston with the new crimp.

[FPoole]

Here's an idea. Why couldn't they put a short pin, the diameter of the annular groove in the piston rod, through the solid inside piece? Have this protrude into the groove only, and set flush with the outside of the solid piece of steel. Then slide the piston body(the tube) over this and crimp it on. This way the pin could never back out as it's captured by the tube and it won't be weakened like drilling and pinning through the rod would cause. Of course they couldn't crimp on top of the pin, but that should be easy enough. The splines would still be needed to stop the rod rotating and causing any wear as well. As far as Air Arms style rod, the Pro Elite was made exactly as the TX and, in FAC form, had a stouter spring than the Diana. The Diana made the power with a little less spring due to the centralized transfer port.

[robs5230]

Only relevant in terms of quality, but ... looks like Diana have a new range of PCP's that look very reminiscent of some current Chinese offerings. I've also seen pics of a Diana 21 stating made in china on the action.
Maybe there is now some corroboration with Diana and other manufacturers that explain recent accounts of poor quality

[Barryg]

Only relevant in terms of quality, but ... looks like Diana have a new range of PCP's that look very reminiscent of some current Chinese offerings. I've also seen pics of a Diana 21 stating made in china on the action.
Maybe there is now some corroboration with Diana and other manufacturers that explain recent accounts of poor quality

Hi Rob I got the PM,
I brought this up some time ago on the DWC
http://www.network54.com/Forum/18447...ese+Diana+-%28

[robs5230]

Hi Rob I got the PM,
I brought this up some time ago on the DWC
http://www.network54.com/Forum/18447...ese+Diana+-%28

Cheers. Not sure that a rebranding of other makes will do the brand much good.

[gc93]

Here's an idea. Why couldn't they put a short pin, the diameter of the annular groove in the piston rod, through the solid inside piece? Have this protrude into the groove only, and set flush with the outside of the solid piece of steel. Then slide the piston body(the tube) over this and crimp it on. This way the pin could never back out as it's captured by the tube and it won't be weakened like drilling and pinning through the rod would cause. Of course they couldn't crimp on top of the pin, but that should be easy enough. The splines would still be needed to stop the rod rotating and causing any wear as well. As far as Air Arms style rod, the Pro Elite was made exactly as the TX and, in FAC form, had a stouter spring than the Diana. The Diana made the power with a little less spring due to the centralized transfer port.

hi, now pin through solid head running through the rod groove that could be right, its a good belt and braces idea , until someone cuts one up we will never know. could organise a bbs piston sweepstake on the outcome