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Old 04-13-2019, 02:45 PM
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LKeithR LKeithR is offline
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Default When You Absolutely Have To Use HSS

As many of you know I'm not a fan of high speed steel tools in today's world--I avoid it as much as I can for practical reasons. However, there are times when nothing else will really work and you have no choice but to grind a tool. I found this video by Adam Booth which shows such a time. Given the space available and the clearances involved I can't think of an insert style tool that would do the job.

I did something like this--on a smaller scale--about 5-6 years ago and, of course, no video or pictures. If I remember correctly it took about 45 minutes to get the tool right--that's one of the downsides to not grinding a lot of HSS--it takes you longer to get it right. Still, even I can do it if need be.

The video is longer but grinding the tool and using it takes up the first 10 minutes or so...

https://www.youtube.com/watch?v=thnT0xZUXX8
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  #2  
Old 04-13-2019, 02:57 PM
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greywynd greywynd is offline
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I’ve made similar tools for grooving and cutting internal threads etc. HSS or a piece of carbide silver soldered to a mild steel holder both work.

For ‘fussy’ sizes and shapes, I usually go to a surface grinder and grind them there now. Rough it out on a mill or bench grinder, finish the profile on the surface grinder, and done. A sine vise makes it easy to setup the relief and clearance angles.


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Old 04-14-2019, 12:47 AM
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clive clive is offline
 
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Being retired I can use HSS and not worry about cost, I quite like using it although of course I use inserts but being on a fixed income the cost of HSS figures high in my choices. I use it threading a lot as I like to thread in reverse away from the chuck.
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Old 04-14-2019, 08:51 AM
Lew Hartswick Lew Hartswick is offline
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I liked how FAST he adjusted the 4 jaw to center that bore . :-)
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Old 04-14-2019, 09:46 AM
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Lu47Dan Lu47Dan is offline
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Adam, has a lot of practice at adjusting an independent 4 jaw.
HSS, has it's uses.
Dan.
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Old 04-28-2019, 06:32 AM
jatt jatt is offline
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On interrupted cuts for sure.

Even on hard stuff, until I get past the worst bits. Just have to resharpen more often and away we go again.
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