Grinding chip breakers on HSS toolbits

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tsph6500
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Re: Grinding chip breakers on HSS toolbits

Post by tsph6500 » Mon Jan 15, 2007 9:40 am

Harold_V wrote:I had offered to talk about HSS tool grinding, and did so with hesitation. My reservations were well founded. It's interesting how a person can do things on a routine basis, with success, and be at a loss to explain how or why, but that's where I find myself. It's nothing short of shocking to be without words, particularly when I rarely have a clue that it's time to shut up.
Thank you very much for putting in the time to teach us. No teacher can ever completely cover a subject nor can a single textbook. One must get information from several sources and yours is a valued one.

I look forward to more.
Best regards,
Jim Leggett

Montreal Live Steamers
www.montreallivesteamers.org

A Founding Member of the Tinkerbell Scale Society - Northern Division
I'm an A.R.S.E. (Association of Railroad Steam Engineers)
Toad Swamp & Punk Hollow Railroad - Head Tycoon
The Juvenile Traction Company - CEO & Apprentice Machinist 3rd Class
White Mountain Central RR - Engineer

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MikeC
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Post by MikeC » Mon Jan 15, 2007 1:32 pm

Very good piece, Harold. It's been a really wild week at work, and as has been mentioned, this cannot be soaked up in a quick five minute skim, so I finally had time to soak it all up this morning on my off day.

Greg Menke
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Post by Greg Menke » Tue Jan 16, 2007 7:31 am

Many thanks Harold, this article has helped me a bunch. Now I'm off to go regrind all my rather curious examples...

:)

Regards,

Greg

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SteveM
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Post by SteveM » Tue Jan 16, 2007 4:14 pm

torker wrote:Ow...they are pricey though. The Buck chuck in the KBC catalogue is worth as much as my lathe
I picked mine up for $60. Used 3-pc jay chucks with no jaw tops are cheap (who wants one with no jaws? Cheapskates like me, that's who).

I got mine from Plaza machinery (http://www.plazamachinery.com/ ). Had head lots of good comments about Joe and the one I got is in fine shape, just have to make the backplate (the spacer I needed to do it just came in the mail, so it's next up on the project list after the kids' Pinewood Derby cars!).
torker wrote: Good to see a pic of a "spider" also. Cool looking gadget!
Russ
Have to give Harold the credit on this one.

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MikeC
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Post by MikeC » Wed Jan 17, 2007 12:47 am

Tried one of Harold's chip breaker grinds tonight on the old SB10L with some CRS. Having the rocker post, I need to fine tune it for more breaking action, but man, that thing cuts. Beautiful finish, too. I will tweak it tomorrow to see if I can get it to turn the chip back enough to break instead of just coiling.

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MikeC
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Post by MikeC » Wed Jan 17, 2007 1:06 pm

With the rocker type post, it looks like the back side needs to be nearly 90 degrees to the top of the tool bit. That, with a little more speed makes little 1/2" long springs or 9s, depending on the feed and speed. Just take Harolds picture and incline the tool bit 15 degrees while trying to maintain the same overall shape at the business end.

MichaelC
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Post by MichaelC » Wed Jan 17, 2007 7:52 pm

Thank you Harold for taking the time to write this up. I was wondering, are there photos included in the write up, if there are they are not showing on my screen?

Thank you
Michael

Harold_V
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Post by Harold_V » Thu Jan 18, 2007 12:37 am

Michael,

Yes, there should be four pictures, total. Three of them should appear with the first post, and one later on, where I show a chip breaker on a more complex form. If, by chance, you still don't see them, I'd be pleased to forward them to you for your perusal. Feel free to contact me on the side, or through a private message, and I'll send them to you via email as an attachment. Please provide the addy you'd like me to use. They're all fairly small in file size, a total of, perhaps, 200 kb.

I have no clue why you aren't receiving the pictures, although you may have options that need to be changed on your personal page. It's been so long since I looked at mine that I have forgotten if showing pics, or not, is one of them. I'll mention the problem to Marty, who may have a solution to your problem.


Harold

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Post by Marty_Escarcega » Thu Jan 18, 2007 7:41 am

MichaelC wrote:Thank you Harold for taking the time to write this up. I was wondering, are there photos included in the write up, if there are they are not showing on my screen?

Thank you
Michael
Michael, the photos were changed to attachments this morning. You should see a DOWNLOAD button to view the files. This is being experimented with to save users with Dialup Internet Connections some time.

Please let me know?
Marty
"Jack of all Trades, Master of None"

MichaelC
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Post by MichaelC » Thu Jan 18, 2007 10:42 am

Harold and Marty,

The photos show up as attachments to download now. Thank you again. What a great site this is.

Michael

rohamm
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Post by rohamm » Thu Feb 08, 2007 8:54 pm

This has been great reading. I'm only afraid I've missed any of Harold's teachings.

If a picture says a thousand words, well, a video...

Is there any way we could look over your shoulder Mr V?.

Harold_V
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Post by Harold_V » Thu Feb 08, 2007 11:35 pm

rohamm wrote:Is there any way we could look over your shoulder Mr V?.
Thanks for your kind words.

I've never figured my instructions were good enough for any kind of publication, but I always welcome visitors. Should you venture to the west coast, stop by and we'll grind up a storm!

Harold

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