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It looks like he has, there's a yellow tinge to the shaft.. looks like oil
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Learning the HSS ropes
- Thread starter Batmanacw
- Start date
I'm using dark cutting oil
Yes, Sir! Dark cutting oil.
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- Apr 14, 2014
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Here's a publication that may help determining the profiles for different materials. I've been using HSS for 90+% of my turning and facing needs since the 1980's. If you grind them right and pay attention to feed and speed rates, they will give mirror finishes on almost any material.
Here's the section on HSS metal lathe tools
sharpeninghandbook.info
With a lathe turning at only 340 rpm carbide will do much more rubbing than cutting. I use HSS exclusively on my Seneca Falls lathe. It has a maximum of 670 rpm.
Keep in mind the minimum nose radius of the tool should be 1-1/2 times the distance it moves with each revolution of the spindle. This publication recommends 4 times the distance moved for glass smooth finishes.
Here's the section on HSS metal lathe tools
Sharpening Handbook
sharpeninghandbook.info
With a lathe turning at only 340 rpm carbide will do much more rubbing than cutting. I use HSS exclusively on my Seneca Falls lathe. It has a maximum of 670 rpm.
Keep in mind the minimum nose radius of the tool should be 1-1/2 times the distance it moves with each revolution of the spindle. This publication recommends 4 times the distance moved for glass smooth finishes.
I have yet to see hss leave a shiny finish on any steel in the 35 years I've been doing machining. I'm sure it's possible but I haven't seen it.Here's a publication that may help determining the profiles for different materials. I've been using HSS for 90+% of my turning and facing needs since the 1980's. If you grind them right and pay attention to feed and speed rates, they will give mirror finishes on almost any material.
Here's the section on HSS metal lathe tools
Sharpening Handbook
With a lathe turning at only 340 rpm carbide will do much more rubbing than cutting. I use HSS exclusively on my Seneca Falls lathe. It has a maximum of 670 rpm.
Keep in mind the minimum nose radius of the tool should be 1-1/2 times the distance it moves with each revolution of the spindle. This publication recommends 4 times the distance moved for glass smooth finishes.
I have. Though if that's 1018 or some such it just isn't going to happen. Harder steels and machinable SS (e.g. 303) can be cut to a very shiny finish.
I don't know if it's the very best reference available, or just what I was looking at when it all finally 'clicked' for me, but "Audel's Machinist and Toolmaker's Handy Book" has a pretty excellent section on grinding lathe tools. I've ground an awful lot of HSS in the past 25 years and although I've been semi-assimilated by the borg (carbide) I still use a lot of HSS. Being able to grind your own cutters is a super-power.
I consider not being able to grind good HSS cutters akin to having a lathe and not being able to cut a thread. It really does open that much more capability in the home shop.
GsT
I've always been able to make decent accurate cuts but shiny has been elusive.
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I have that piece of hss that I made a rounded cutting edge on did. It was higher tool pressure,but not much and left a really nice finish.
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I must admit my first experiences with turning were with 303 and 316 stainless for food processing equipment. Finish was paramount so we had to learn to grind the tools to make finishes that would be acceptable to the inspection department. It was a steep learning curve. The instructor was a highly regarded craftsman from the old country. He demanded quality, but was willing to take the time and effort to be sure the goals were met.
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