MWF FEED
29th August 2022, 11:30 PM
I forget if I have asked part of this before. Apologies if I have .
I want to make some fittings out of 4140 soon.
I was also turning some simple 4140 stub axles for a machine trolley out of it today . I used some HSS and it could have been a bit dull ? It seemed to just rub off the cutting edge round. I was rushing and just went onto Carbide and got it done . So I don't know if I had re ground the HSS sharp and tried again if it would have worked or not .
When I go to do the nice fittings I need . A bit like this below with a 5/8 Whitworth thread on it . Should I forget the HSS and just go with carbide?
And will the 4140 Knurl OK ? What a knurling tools made from ?
IMG_1945A.jpg (https://metalworkforums.com/attachment.php?attachmentid=399662&d=1661773159)
Attached Images
https://metalworkforums.com/images/attach/jpg.gif IMG_1945A.jpg (https://metalworkforums.com/attachment.php?attachmentid=399662&d=1661773159) (116.4 KB)
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=208413&goto=newpost)
I want to make some fittings out of 4140 soon.
I was also turning some simple 4140 stub axles for a machine trolley out of it today . I used some HSS and it could have been a bit dull ? It seemed to just rub off the cutting edge round. I was rushing and just went onto Carbide and got it done . So I don't know if I had re ground the HSS sharp and tried again if it would have worked or not .
When I go to do the nice fittings I need . A bit like this below with a 5/8 Whitworth thread on it . Should I forget the HSS and just go with carbide?
And will the 4140 Knurl OK ? What a knurling tools made from ?
IMG_1945A.jpg (https://metalworkforums.com/attachment.php?attachmentid=399662&d=1661773159)
Attached Images
https://metalworkforums.com/images/attach/jpg.gif IMG_1945A.jpg (https://metalworkforums.com/attachment.php?attachmentid=399662&d=1661773159) (116.4 KB)
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=208413&goto=newpost)