Tuning RAW hammer support sleeve

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bucketboy

bucketboy

Member
Apr 5, 2019
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Lincolnshire, United Kingdom
This is a little modification I do to RAW’s and Rapid to support the hammer as it travels towards the valve. It has two functions, firstly because the hammer is not able to wobble about as much, the action noise and subsequent vibrations are massively reduced, making the gun feel smoother. Secondly, the sleeve allows the hammer to strike the valve stem but stops the hammer hitting valve body, avoiding a damaged valve in the event of dry firing without any air in the system.



The sleeve is made from PTFE, it’s a sliding tolerance fit inside the block and over the nose of the hammer. There is a slot to accommodate the cocking dog and a hole to allow for correct positioning and ease of removal. The sleeve is held in place by a M4 grubscrew that is located at the bottom of the stock bolt hole.

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Additionally, I have replaced the metal striker on the hammer with one made from delrin, this reduces action noise further. I also reduce the Dia of the nose of the hammer, this reduces weight, allowing the hammer to attain speed more quickly, it move the CofG of the hammer further back so it is more stable as it move within the block and the reduced Dia means greater wall thickness of the support sleeve.



This modification also works exceptionally well with a SSG device both consistency and efficiency are much improved.



Bb
 
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Very nice! You sure have some great modifications, parts and great advice when it comes to the RAW and Theoben. 

Stoti
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Thanks, I have owned Rapids/RAW for over 20years, at the time they were the pinnacle of airgun design and although there are some other excellent cutting edge PCP now available, (with the exception of the Evol,) none hold any real appeal to me. The simplicity of the design is its genius. 


Rapids/RAW are so easy to maintain, tune and customise, IMO there is no more versatile PCP available even today, it shoots equally well from 6-100fpe, in .177-.357. Barrel and calibre swaps take just a few minutes and with a spare reg and bolt assembly there is no tuning or set up required either.

The one thing I will criticise about the Theoben and in particularly RAW , while both companies made/make amazing airguns, the moderators they make are absolutely rubbish, how RAW can make a mod so big yet work so badly, almost defies physics.



Bb
 
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Took out my sleeve and derlin nose for making more power it didn't work as well but it smooths up the action and for lower power they work great I'm running just over 60 ftlbs in my 25 cal and even with a heavy spring I couldn't get over 50 with the derlin worked great though for less power and the ssg helps also I'm sure some of my other mods to the valve also came from bucketboy glad to see your back around again 
 
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bucketboy said:
This is a little modification I do to RAW’s and Rapid to support the hammer as it travels towards the valve. It has two functions, firstly because the hammer is not able to wobble about as much, the action noise and subsequent vibrations are massively reduced, making the gun feel smoother. Secondly, the sleeve allows the hammer to strike the valve stem but stops the hammer hitting valve body, avoiding a damaged valve in the event of dry firing without any air in the system.



The sleeve is made from PTFE, it’s a sliding tolerance fit inside the block and over the nose of the hammer. There is a slot to accommodate the cocking dog and a hole to allow for correct positioning and ease of removal. The sleeve is held in place by a M4 grubscrew that is located at the bottom of the stock bolt hole.

View attachment 115025View attachment 115030View attachment 115036View attachment 115040


Additionally, I have replaced the metal striker on the hammer with one made from delrin, this reduces action noise further. I also reduce the Dia of the nose of the hammer, this reduces weight, allowing the hammer to attain speed more quickly, it move the CofG of the hammer further back so it is more stable as it move within the block and the reduced Dia means greater wall thickness of the support sleeve.



This modification also works exceptionally well with a SSG device both consistency and efficiency are much improved.



Bb
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What diameter did you take the front of the hammer down to?

thanks
Quint
 
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