Theoben Rapid Forum

Everything Technical About Rapid => Technical => Topic started by: FAC CHRIS on October 08, 2025, 08:29:22 AM

Title: rapid mk1 adjustable hammer pip
Post by: FAC CHRIS on October 08, 2025, 08:29:22 AM
as per title ,can anyone tell me how it works,also how to adjust it,had it a while but never used it, Chris
Title: Re: rapid mk1 adjustable hammer pip
Post by: Ca_Varminter on October 08, 2025, 02:47:17 PM
The adjustable pip, in theory would adjust the power of your Rapid.
It does this by shorting the "stroke" or "lock time"...
So screwing the pip "In", would lengthen the stoke...So Increase Power.
Doing the opposite... has the opposite effect!!

Good Luck,
Stuart
Title: Re: rapid mk1 adjustable hammer pip
Post by: KevG on October 09, 2025, 12:49:47 AM
I would not bother if you want to run your gun at its best.you need around 2mm of hammer pip thread inside the hammer for the inertia spring to sit on else the spring will break or deform.so if it's screwd out spring will get damaged.to much thread in the  hammer will loose travel of the inertia weight so will not work at it's best or not at all.
kevG
Title: Re: rapid mk1 adjustable hammer pip
Post by: FAC CHRIS on October 09, 2025, 01:40:14 PM
Thanks for the replys and info,the reason i asked was because i fitted a new valve to the gun that the bottle screws into, the old one had damaged threads,but since fitting the new one power is realy low as in 5fpds,tried different hammer springs to no avail,this is with a std hammer fitted, chris
Title: Re: rapid mk1 adjustable hammer pip
Post by: Squinty on October 10, 2025, 01:03:05 AM
Hi, have you used a Best Fittings bottle valve?
If you are still down on power after changing springs an adjustable hammer pip probably won't make much difference.

The issue is likely to be airflow, they are known to be more restrictive in some applications.
BF valves have a narrower pip/bore than the OE items.
Unfortunately more suited to sub-12 or regulated (primarily BSA S10 & R10s)

Standard hammer??

Adjustable pips are really just for fine tuning
As Kev has mentioned you stand a fair chance of messing up the inertia cycle or breaking the inertia soring.
Title: Re: rapid mk1 adjustable hammer pip
Post by: FAC CHRIS on October 13, 2025, 05:58:26 AM
ok thanks,ill take another look at it when ive got five minutues,cheers chris
Title: Re: rapid mk1 adjustable hammer pip
Post by: FAC CHRIS on October 18, 2025, 11:51:06 AM
All sorted,back in action,chris :)
Title: Re: rapid mk1 adjustable hammer pip
Post by: Brooksy on October 20, 2025, 07:11:48 PM
That's not good enough! Tell us what you did to sort it out man! 😁
Title: Re: rapid mk1 adjustable hammer pip
Post by: FAC CHRIS on October 26, 2025, 05:08:08 PM
different lenghth hammer pip,on standard hammer,and a different spring,then got the lastbit of adjusment on the back cap,so all good . :) chris