Tool Post Grinder Sizing
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Mike Poore
I would like to know if a 4" tool post grinder will work properly on a SB 9"?
I have one sold by South Bend that I would like to rebuild and use, but I hate to waste my time on it if it is too big for my lathe. My South Bend literature makes no mention of size recommendations. It looks like a lot of weight to bolt onto a 9" lathe compound. |
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Retired Gunsmith
Photos would be helpful. Thanx and Good Shootin'
Derrick Martin
ask_derrick@...
-----Original Message-----
From: Mike Poore <mpoore10@...> To: SouthBendLathe@groups.io Sent: Mon, Jul 25, 2022 8:29 am Subject: [SouthBendLathe] Tool Post Grinder Sizing I would like to know if a 4" tool post grinder will work properly on a SB 9"?
I have one sold by South Bend that I would like to rebuild and use, but I hate to waste my time on it if it is too big for my lathe. My South Bend literature makes no mention of size recommendations. It looks like a lot of weight to bolt onto a 9" lathe compound. |
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Mike Poore
My question is if a 4" tool post grinder sold by South Bend is
approrpriate in size for a South Bend 9" lathe? I suppose I could
take pictures, but I have no idea how they would help answer the
question. Let me try a different question: Has anyone used the 4"
tool post grinder on a SB9A and did it work okay?
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On 7/25/2022 1:22 PM, Retired Gunsmith
via groups.io wrote:
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Mark R. Jonkman
If you have it available and put a grinding wheel on it how does vertical center of grinding wheel compare against the center height
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For how to select tool post grinder for lathe Mark On Jul 25, 2022, at 4:48 PM, Mike Poore <mpoore10@...> wrote:
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wlw19958
Hi There,
I cannot answer your question directly but I do use tool post grinders on my lathe. I use a Dumore 44 series tool post grinder on my 9 inch and Heavy Ten lathes as well as other lathes I have owned. Good Luck! -Blue Chips- Webb |
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mike allen
I think it will be fine on your 9 . have you tried
installing it on your compound yet ? Keep in mind that you will
want to cover anything you can on the lathe & nearby machines
before you use the grinder . animal On 7/25/2022 1:48 PM, Mike Poore wrote:
My question is if a 4" tool post grinder sold by South Bend is approrpriate in size for a South Bend 9" lathe? I suppose I could take pictures, but I have no idea how they would help answer the question. Let me try a different question: Has anyone used the 4" tool post grinder on a SB9A and did it work okay? |
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Mike Poore
It came in parts, so I have not had a chance to mount it yet nor did
I want to spend the time and money rebuilding it just to stick it on
a shelf. Comparing the centerlines is a good idea as far as
determining fit. It's a little weird that South Bend sold these
without any recommendations as far as the proper size grinder for a
given size lathe. I looked and can't find a thing.
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The Dumore link recommends a Series 44 grinder for lathes with 8"-14" swing. Series 44 grinders weigh 35# and use a maximum 3" diameter grinding wheel. The South Bend unit can use a 4" wheel and probably weighs about the same. I guess my 4" grinder should work okay. The advantage of the South Bend grinder is the direction of rotation avoids having to run the lathe backwards and risk unscrewing the chuck. 35# sounds like a lot to mount on the compound, but I suppose light passes are part and parcel with a grinder anyway. Once I rebuild it and mount it, I will follow up with any info that might be helpful to others. Thanks. On 7/25/2022 6:06 PM, mike allen wrote:
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Davis Johnson
If you look at the tooling dimensions drawing you might notice that there wasn't a lot of variation in swing over the compound until you got to the much larger lathes. The 9" workshop, 10K and the "heavy 10" had almost identical swing over the compound. Larger than that swing over the compound increased less quickly than swing over the bed. So, it wouldn't surprise me much if one tool post grinder worked
with many or most lathe models. On 7/26/22 00:03, Mike Poore wrote:
It came in parts, so I have not had a chance to mount it yet nor did I want to spend the time and money rebuilding it just to stick it on a shelf. Comparing the centerlines is a good idea as far as determining fit. It's a little weird that South Bend sold these without any recommendations as far as the proper size grinder for a given size lathe. I looked and can't find a thing. |
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rlm_mcv
This might be an older model but consult the last page. https://wewilliams.net/docs/1925%20-%20The%20South%20Bend%20Method%20for%20Refacing%20Valves%20in%20the%20Lathe%20-%20Bulletin%20No%2086.pdf
On Monday, July 25, 2022 at 03:48:55 PM CDT, Mike Poore <mpoore10@...> wrote:
My question is if a 4" tool post grinder sold by South Bend is
approrpriate in size for a South Bend 9" lathe? I suppose I could
take pictures, but I have no idea how they would help answer the
question. Let me try a different question: Has anyone used the 4"
tool post grinder on a SB9A and did it work okay? On 7/25/2022 1:22 PM, Retired Gunsmith
via groups.io wrote:
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rlm_mcv
You might also want to look here, http://vintagemachinery.org/pubs/1617/3752.pdf
On Monday, July 25, 2022 at 03:48:55 PM CDT, Mike Poore <mpoore10@...> wrote:
My question is if a 4" tool post grinder sold by South Bend is
approrpriate in size for a South Bend 9" lathe? I suppose I could
take pictures, but I have no idea how they would help answer the
question. Let me try a different question: Has anyone used the 4"
tool post grinder on a SB9A and did it work okay? On 7/25/2022 1:22 PM, Retired Gunsmith
via groups.io wrote:
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Mike Poore
That's a good point. I didn't think about the swing over the
compound, but it is more important in this circumstance.
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On 7/26/2022 12:21 AM, Davis Johnson
wrote:
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Mike Poore
Well, this diagram pretty much answers the question. Thank you.
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The only difference in the grinder to fit a 9"-17" lathe is the mounting bolt and t-nut with the addition of a spacer on the larger lathes. The t-nut that came with the grinder fits my compound, so it I see no reason it is not the correct grinder as is. Cool. I bought the grinder for $5 from a guy that bought it with a pile of scrap. Everything is there except the belt, amazingly. Accessories are like a scavenger hunt. I was at an auction and bought a milling attachment for $3. I think I was the only one that knew what it was. Everyone was bidding up Harbor Freight power tools and ignored the funky looking vise. Of course that is after going to a bunch of auctions and wasting my time and gas for nothing. It all equals out, but its fun scoring a victory once in a while. On 7/26/2022 1:55 AM, rlm_mcv via
groups.io wrote:
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mike allen
I have a Atlas TP grinder & it's reversible . If you find a source with a good price on wheels please let us know .
thanks animal |
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Mike Poore
Being reversible would make doing internal grinding easier. On mine
I would have to run the lathe in reverse for internal grinding.
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I have a lifetime supply of grinding wheels from another auction score. A lot of them are for much larger machine than I will ever have. I anyone is interested in 2" ID wheels, let me know. I also have another tool post grinder that needs a new home. See pics below. It has a flat bottom with 4 bolt holes. A mounting plate would need to be made.   On 7/26/2022 2:05 PM, mike allen wrote:
I have a Atlas TP grinder & it's reversible . If you find a source with a good price on wheels please let us know . |
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Mike Poore
Correction: The grinding wheels are 3" ID. Here is a photo:
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 On 7/26/2022 8:38 PM, Mike Poore via
groups.io wrote:
Being reversible would make doing internal grinding easier. On mine I would have to run the lathe in reverse for internal grinding. |
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Don Verdiani
Mike,
What’s the center hole diameter and thickness of these wheels? I have a Dumore tool post grinder, that uses 3” wheels, 3/8” hole. These look to be 1”’ish. If the prices is right, I could make up some adapter flanges.
Don Verdiani Westtown, PA
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io>
On Behalf Of Mike Poore
Sent: Tuesday, July 26, 2022 9:44 PM To: SouthBendLathe@groups.io Subject: Re: [SouthBendLathe] Tool Post Grinder Sizing
Correction: The grinding wheels are 3" ID. Here is a photo: On 7/26/2022 8:38 PM, Mike Poore via groups.io wrote:
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Mike Poore
The ID is 3". The OD is 12". 3/4" thick.
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On 7/27/2022 5:45 PM, Don Verdiani
wrote:
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Don Verdiani
Thanks. I completely misunderstood what they were. I was thinking tool post grinder, and looked right over the “ID” thing.
Don
From: SouthBendLathe@groups.io <SouthBendLathe@groups.io> On Behalf Of Mike Poore
Sent: Thursday, July 28, 2022 1:24 AM To: SouthBendLathe@groups.io Subject: Re: [SouthBendLathe] Tool Post Grinder Sizing
The ID is 3". The OD is 12". 3/4" thick. On 7/27/2022 5:45 PM, Don Verdiani wrote:
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