'Cocker barrel tap size limit and availability
A little help please, I'm looking at tapping raw Al (to be anodized after machining) for 'cocker barrels but have not been able to find the mythical H7 limit 15/16"-20 tap no matter how hard I try (granted I'm not the best at looking for stuff on the internet, but I've gone over several manufacturers' catalogs and online stores), the closest I've been able to find are a GH5 limit hand tap and an RH6 roll forming tap.
I have a drill press and tapping guides, in case I get the roll forming tap.
Now, here are a few questions:
Does anyone have a lead on an H7 tap that's under $100 (preferably under $70)?
Would H5 limit be good enough (that's what airsoldier used to sell)? Or do I definitely need an H7 limit tap?
If I can get away with H6, would my setup be good enough (I can provide further detail if necessary)
Any help is appreciated.