MWF FEED
8th August 2020, 10:50 AM
SAM_0677.jpg (https://metalworkforums.com/attachment.php?attachmentid=387984&d=1596842769)SAM_0675.jpg (https://metalworkforums.com/attachment.php?attachmentid=387985&d=1596842800)Hello from Geebung.
The first pic has the after ground finish. I grind with 2 facets and all obtuse angles. This gives good life and some resistance to re engaging the work on top of chips. The second pic shows how it came in. Only 1 facet and one of the angles very accute. The saw shops don't realise metal cutting geometry is different. From the same shop I have seen countersinks offhand ground on a bench grinder and annular cutters reduced in diameter by grinding the margins on a linisher. At $42.00 ea.
Regards
BC
Attached Images
https://metalworkforums.com/images/attach/jpg.gif SAM_0675.jpg (https://metalworkforums.com/attachment.php?attachmentid=387985&d=1596842800) (62.5 KB)
https://metalworkforums.com/images/attach/jpg.gif SAM_0677.jpg (https://metalworkforums.com/attachment.php?attachmentid=387984&d=1596842769) (154.6 KB)
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=205442&goto=newpost)
The first pic has the after ground finish. I grind with 2 facets and all obtuse angles. This gives good life and some resistance to re engaging the work on top of chips. The second pic shows how it came in. Only 1 facet and one of the angles very accute. The saw shops don't realise metal cutting geometry is different. From the same shop I have seen countersinks offhand ground on a bench grinder and annular cutters reduced in diameter by grinding the margins on a linisher. At $42.00 ea.
Regards
BC
Attached Images
https://metalworkforums.com/images/attach/jpg.gif SAM_0675.jpg (https://metalworkforums.com/attachment.php?attachmentid=387985&d=1596842800) (62.5 KB)
https://metalworkforums.com/images/attach/jpg.gif SAM_0677.jpg (https://metalworkforums.com/attachment.php?attachmentid=387984&d=1596842769) (154.6 KB)
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=205442&goto=newpost)