Quick question what are some tipps on tapping stainless.

Im trying to tapp a M8x1.25 hole in a wastegate flange and its supper hard and i think im gonna snapp my tapp . I know stainless is hard due to its nickel content.

What are some ideas.

 

use cutting oil. feed the tap in a bit, then back it out a bit, feed it in a bit more, then back out to clear the chips and so on. you also want to make sure your tap is nice and square to the hole.

 

Buy a HSS tapp... it will last longer and wil be less likely to snap during use.

 

if you want it done easy and right, take it to a vertical mill.

 

even easier, and guaranteed not to break a tap is a pneumatic tapping arm, but not everyone has access to tools like these.

 

c jack has one in his bedroom.

 

and closet

 

Are you out of the closet yet ?

 

c jack makes manifolds with c tune.

tru story

 

Use tapping fluid and maybe drill the hole out with a bit a few thousandths larger.

 

anchor lube works excellent on stainless steels. A lot better than regular cutting oil. Keep backing the tap out as you go.. Double check your tap drill size

 

I would completely remove the tap and clean the chips out with air or brake clean...dont forget to clean the tap off and reapply oil......Have you ever had to drill a tap out? its like dry butt seks, by the time your done you've said every bad word in the book and your *** is sore...it might be worth taking to a machine shop or fab shop

 

Hey guys. I got a HSS tapp and it worked wonders . The cheap princess auto/harbour fright stuff no good LOL.

 

yes but still have the ball gag.

 

using the correct tool for a job usually works wonders