Hw35 Leather or synthetic piston seal ?

[Shed tuner]

Hi Jon.

I normally machine the front face of the leather sealed piston back to expose more rod, then thread the rod and screw on an alloy adaptor for the synthetic seal, so ending up with 71mm stroke --- this also involves extending the cocking slot in the piston rear wards a tad to gain clearance.

A 71mm stroke is about as much as you can go without altering the woodwork and running into other cocking problems.

If you machine the front of the leather sealed piston as you describe you'll run into cocking problems due to the stroke and you'll find you have to extend the piston slot that far back you'll break through the skirt.


All the best Mick

Sounds perfect, thanks mate; I think I'll be doing exactly this over the xmas hols when the hubbub in the house gets too much for me

(sorry for the slight threadjack Les )

[johnbaz]

How about machining a new piston head to take an O ring?

I have this tuned one and it's smoother than a wench's inner thigh, It shoiots superbly too

Pic 1

Pic 2

I made one of these for an airsporter mk1 as the leather seal was kaput although it wasn't as good as the one in the HW35

Pic 1

Pic 2




John

[T 20]

How about machining a new piston head to take an O ring?

I have this tuned one and it's smoother than a wench's inner thigh, It shoiots superbly too

Pic 1

Pic 2

I have already done that, John

http://www.airgunbbs.com/showthread....10#post2931510

The finished gun and piston was shown in Jim's Real Airgun Sport.

Unfortunately my doctor won't allow me to use any machinery that I could fall into and kill myself at present, so I couldn't offer to make Les an O ring piston head.



All the best Mick

[I. J.]

IMO - keep original.

[johnbaz]

I have already done that, John

http://www.airgunbbs.com/showthread....10#post2931510

The finished gun and piston was shown in Jim's Real Airgun Sport.

Unfortunately my doctor won't allow me to use any machinery that I could fall into and kill myself at present, so I couldn't offer to make Les an O ring piston head.



All the best Mick

Crumbs Mick, Take it easy mate, There's always later to play on your lathes/Millers!

My old Faircut lathe is worn out, I have a nice 1950's Myford that's nice and tight on the ways but no room to get it set up until I clear the garage somewhat!



John..

[Peter Dunkley]

Crumbs Mick, Take it easy mate, There's always later to play on your lathes/Millers!

My old Faircut lathe is worn out, I have a nice 1950's Myford that's nice and tight on the ways but no room to get it set up until I clear the garage somewhat!



John..