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whats the best material to make some nipples from
Posted: Wed Sep 11, 2019 12:53 pm
by Tony-c
trying to help a mate out with having some nipples made. About inch long overall, 2mm hole, .215 dia for cap, and threaded 1/4 bsf
any specific material best to use?
I have zero knowledge on black powder, but as its not really a pressure bearing part I didnt think it that important
Re: whats the best material to make some nipples from
Posted: Wed Sep 11, 2019 2:43 pm
by 1066
Well good ones are made from Beryllium copper, some are platinum lined and some Ampco, however they are also made of stainless or carbon steel.
Not really a high pressure problem but the gas jet is very erosive, it depends how much they will be used. They also need to withstand a repeated hammer blow and not round off when trying to remove them if they are a bit tight.
I think the thread is usually 1/4-28 UNF not 1/4 bsf 26tpi
Re: whats the best material to make some nipples from
Posted: Wed Sep 11, 2019 3:04 pm
by glevum
Machining Beryllium Copper is very hazardous.
The dust can be deadly.
Re: whats the best material to make some nipples from
Posted: Wed Sep 18, 2019 6:19 pm
by andrew375
I've made them from ordinary mild steel, for Enfields and revolvers. Worked fine, flash holes only slightly enlarged after close to a thousand rounds over 15 years or so. If you want to go for something better then a machinable stainless will be the way to go. Btw, nipples are a pain to make due to the number of machining stages. The critical feature is the cone, get it wrong by even a small amount and either the cap won't go on or it will simply fall off.