Author Topic: HW97k .177 12ish flb Review & Test  (Read 3659 times)

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Offline landymick

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Re: HW97k .177 12ish flb Review & Test
« Reply #10 on: May 16, 2016, 03:10:47 PM »
Its the compression tube that has a different inside diameter allowing the different sized internals to be swapped. So an old 25mm can take the new 26mm & visa versa.
 The action is same size as the 80 which is a bit over 30mm around 32 or so.

The 97 SN in 25mm is supposed to be up to 1375964 but later ones reported up to 1446049.

The 77 SN in 25mm is from 1000375 -1301036.

All would need checking to be sure but to be honest both are fine.

Offline seagate

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Re: HW97k .177 12ish flb Review & Test
« Reply #11 on: May 16, 2016, 05:14:17 PM »
Thanks Mick. :).

 Hopefully something second hand might crop up at Redbeck,i fancy a 22.
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Offline Gambo

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Re: HW97k .177 12ish flb Review & Test
« Reply #12 on: May 18, 2016, 07:13:41 PM »
the compression tube that has a different inside diameter allowing the different sized internals to be swapped. So an old 25mm can take the new 26mm & visa versa.

Call me fick, but that doesn't make any sense to me. :-\


How can you fit a 26mm piston and seal into a 25mm hole...........and if a 25mm piston and seal were fitted into a 26mm cylinder, it would be like a dick in a shirt sleeve!! :o

Offline seagate

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Re: HW97k .177 12ish flb Review & Test
« Reply #13 on: May 18, 2016, 07:45:31 PM »
He means the outer diameter of the compression tube is the same on both versions,the inner is machined to 25 or 26 mm depending.
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Offline landymick

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Re: HW97k .177 12ish flb Review & Test
« Reply #14 on: May 18, 2016, 08:50:26 PM »
That is correct .
The piston runs in its own sleeve (compression cylinder) with an outside diameter that fits the action.Same size on each set up,just swap the internals in pairs.


Offline Gambo

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Re: HW97k .177 12ish flb Review & Test
« Reply #15 on: May 18, 2016, 09:57:45 PM »
So are you actually saying that either 25mm and 26mm actions can be swapped into each others stocks, rather than pistons/seals being swapped between the different internally sized cylinders?

If that's not what you mean......I'm still confused? :-\

Offline seagate

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Re: HW97k .177 12ish flb Review & Test
« Reply #16 on: May 18, 2016, 10:14:05 PM »
I sometimes wonder . ::) :D

  that shiney bit of metal visible through the pellet loading bay that slides back when cocking the rifle, that bit is the compression tube. The internal diameter of that shiney tube that the piston traverses can be either be 25 or 26mm. The outer diameter is identical  .

 
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Offline landymick

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Re: HW97k .177 12ish flb Review & Test
« Reply #17 on: May 18, 2016, 10:32:11 PM »
Thats it,if you look at the parts list it may become clear for you ??? :)

The early 77 & first 97 have 25 mm pistons that run in the compression tube with internal diameter of 25mm & external diameter of about 30mm that fits in side the action or main cylinder of the rifle.
These two parts can then be fitted in to the later 77 or 97 that run the 26mm internal diameter compression tube.

The same sort of thing is done when Venom do the reduced cylinder conversion,from 30 mm bore to 25mm or 26mm only the sleeve is a permanent fix.

Any clearer? :)

Offline Gambo

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Re: HW97k .177 12ish flb Review & Test
« Reply #18 on: May 19, 2016, 07:31:25 PM »
that shiney bit of metal visible through the pellet loading bay that slides back when cocking the rifle, that bit is the compression tube. The internal diameter of that shiney tube that the piston traverses can be either be 25 or 26mm. The outer diameter is identical  .

Got it!!!

I'd somehow forgotten there was in inner cylinder inside the outer cylinder. Doh.

Mick n Nick........Smite me for being like Dory.


Offline seagate

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Re: HW97k .177 12ish flb Review & Test
« Reply #19 on: May 19, 2016, 07:52:08 PM »
 ;D
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