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Taimen - Russian pneumovacuum speargun

popgun pete

Well-Known Member
Jul 30, 2008
2,821
543
153
Australia
The is a new less raked handle in the works, but to maintain some tradition in the handle shape I think that it needs a larger butt plate as illustrated here. One advantage is the gun is more securely held if being twisted in your hand by the larger pad at the grip base preventing it slipping too easily through your fingers.
Tamen new handle shape adjustment.jpg
 

popgun pete

Well-Known Member
Jul 30, 2008
2,821
543
153
Australia
I thought that a diagram showing the various seals in their respective positions would be easier to look at, however the size of the piston seal in the handbook does not seem correct as the OD will have to be close to 10 mm, or 11 mm for the 8 mm diameter spear version of the "Taimen". Note that the 6.5 mm spear version has now been discontinued, although it was basically a different front hub on the 7 mm spear version.
Taimen PVRM seals 1.jpg

Hacoc is the handpump and the piston is поршень. This diagram only lacked the polyurethane bush in front of the damper or shock absorber and is now added.

The "O" ring sizes are quoted as internal diameter ID x section width SW, hence the rear body rings have an OD of 21 + 3 + 3 which equals 27 mm. The ID of the tank tube is 26 mm and from memory the tank has a slight counter bore at the rear end, therefore the 27 mm diameter will be a snug fit. The piston ring OD is 4 + 3 + 3 which equals 10 mm and that corresponds to the 10 mm barrel bore. I assume that the same ring is used on the 8 mm diameter spear version by having a slightly larger seat diameter on the bigger piston body which forces the ring to stretch out to 11 mm OD.

Previously the "O" ring sizes were quoted as OD x ID as seen here. Note that the ring reference numbers have changed compared to above.
 
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