Threaded View
-
05-08-2019 #1
I have an assembly I’m making and one of the parts are these small studs of stainless steel. They have an M8 through the center, three M6 blind holes from the back and an M5 from the side.
It’s 303 I think and I’ve not had too much trouble on the lathe. The mill was tricky but I got it down in the end but tapping it is another story.
Feels to me like its binding or something, after a few turns it tightens up quickly, then makes a loud creaking, then breaks the tap.
The force it takes to twist the M8 tap, to cut a few degrees of thread is just under how much force it takes to break the tap so I got an M8 done with lots of oil gong very very slowly.
The M6’s I’m not having so much luck with, broke three taps already and scraped one part. After a certain point the force it takes to cut the thread is just more than the tap can take no matter how slow I go.
I’ve tried everything I could think of today, someone once advised me to mix some anti-seiz and tapping oil for lubrication with stainless so I’ll try that tomorrow. I have a pot of the nickel stuff knocking about somewhere but I think I’ve already tried machining with that concoction and as I recall I didn't notice much difference.
I could really do with some advice.
Thread Information
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
Similar Threads
-
RFQ: Stainless motorcycle wheel spacers
By stuartpurdue in forum Projects, Jobs & RequestsReplies: 1Last Post: 29-06-2017, 03:11 PM -
stainless bar?
By kingcreaky in forum General DiscussionReplies: 3Last Post: 12-02-2016, 09:17 PM -
RFQ: Water or laser cut stainless flanges
By r0bsk1 in forum Projects, Jobs & RequestsReplies: 2Last Post: 23-09-2013, 08:12 PM -
RFQ: RFQ: Micro Precision in Stainless Steel.
By mikewatch in forum Projects, Jobs & RequestsReplies: 3Last Post: 12-04-2013, 11:49 PM -
How to cnc cut 1-2mm stainless sheet ??
By Ricardoco in forum Metalwork DiscussionReplies: 9Last Post: 28-03-2013, 04:06 AM
Bookmarks