Tony,
grinding HSS can be easy or hard. Generally, if you have a store-bought grinder it comes with the cheapest of the cheap Aluminum Oxide wheels (brown or gray). Those are hard wheels that load up quickly and heat up your HSS tool. These wheels are best suited
for normal carbon steel tools like chisels and such, not so much for HSS. That being said, you can upgrade your wheels for not a lot of money to a better wheel (white, for instance) or even CBN (much pricier). The grades they come in are usually about 40 (coarse)
and 60 (less coarse). You can also get 80 (fine) and 100 (finer). Some manufacturers go as high as 180 grit. The finer the wheel, the longer you have to grind at it.?
Before you spend money on new wheels, look at their grinding surface. If it has lots of shiny areas, your wheel is loaded up and needs dressing. That alone, will increase your performance and enjoyment. You need a diamond dresser or a wheel dressing stick.
That will fix up the wheel and restore its performance.?
However, that is not a permanent fix. A better solution is to get the right wheel for your application. The general rule is to use a hard wheel for soft grinding and a softer wheel for hard steel grinding.?
Without going in too deep, the grinder wheels are marked for Material, Coarseness and Hardness.?
Material can be AlOx, Silicon Carbide, Alumina Ceramic, CBN. For HSS grinding you want Aluminum Oxide or Ceramic Alumina, or CBN. Silicon carbide does not work that well on HSS bits. Aluminum Oxide wheels will be the easiest to find. They cost about 20-25%
more than the cheesy stuff from home depot, but are ideal for your application.?
Next is Coarseness Grade. Four roughing out a tool bit you want something around 36-40 grit. The rougher grits will cut faster, with less heating. After roughing it out you want to use a 60-80 grit wheel to refine the grind. If you have a 100, then you can
refine it further. On the CBN side, you can go to 360 grit.?
Next is Hardness. A softer bonding material for the wheel, will allow it to break down easier, uncovering fresh new abrasive grains that are sharp and will bite into your HSS bit faster, better, and with less heat.??Anyway,
here, on any wheel other than CBN, the grade you want to pick is a soft one: B, D, E or F. B is softer than F
So, to summarize my ramblings: Get an Aluminum Oxide wheel, Soft grade B, D, preferably, or E, F otherwise. With a grit in the 30-36
range. Also, buy a wheel dresser diamond or a wheel dressing stick and maintain your wheel regularly (I would do it before each session of HSS grinding and during, if you notice and shininess or loading).?
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I hate to shape a new cutting tool since there is so much material to grind away. I would like you forum members to tell me which wheel you use or which is the most aggressive. My old cutters are ground for my lantern tool post a couple are still usable
but most need to be deep sixed.
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Re: mrpete222 just uploaded a video
I can't afford those prices. I hope he sells out!
On Sat, Feb 23, 2019 at 9:42 AM Steven H via Groups.Io <stevesmachining= [email protected]> wrote: MrPete222 (YouTube) is having a sale on all his great videos if anyone? is interested. See below.
Begin forwarded message:
From: YouTube < noreply@...> Date: February 22, 2019 at 4:37:33 PM EST To:? Subject: mrpete222 just uploaded a video
has uploaded This is my Latest OFFERING...
____________________________________________________________ 
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As Jody said, keep the water nearby. ?But no closer than that.
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On Feb 25, 2019, at 10:42 AM, Mike Lutz via Groups.Io < lutzmichaelgeorge@...> wrote: I have 6 inch bench grinder set up with an 80 grit stone on one side and a 6 inch cutoff wheel on the other. Mounting the cutoff wheel on the bench grinder was one of my better ideas. Not sure why it took me so long to see that. I had been fighting with a hand-held grinder for quite a while. Much more accuracy mounted on the bench grinder, and safer. Plus, I can't even remember the last time I used a hack saw for cutting bolts, machine screws, and anything else as needed.
Mike
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I have 6 inch bench grinder set up with an 80 grit stone on one side and a 6 inch cutoff wheel on the other. Mounting the cutoff wheel on the bench grinder was one of my better ideas. Not sure why it took me so long to see that. I had been fighting with a hand-held grinder for quite a while. Much more accuracy mounted on the bench grinder, and safer. Plus, I can't even remember the last time I used a hack saw for cutting bolts, machine screws, and anything else as needed.
Mike
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Tony:??
As a follow-up, , Tom Lipton is using a cutoff wheel to hog off chunks of HSS when making a trepanning tool -- following up with clean-up on the bench grinder.
Bill
On Sunday, February 24, 2019, 9:27:34 PM PST, tony wilson <tonyewilson@...> wrote:
I hate to shape a new cutting tool since there is so much material to grind away. I would like you forum members to tell me which wheel you use or which is the most aggressive. My old cutters are ground for my lantern tool post a couple are still usable but most need to be deep sixed.
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Tony:
If you are removing a lot of material, you may consider using a metal cutting wheel on an angle grinder, or even on a Dremel, depending on the shank size.??
Then you can follow that with an AOx or CBN wheel on your pedestal grinder or a mounted point on your Dremel, with a final hone on a sharpening stone or diamond hone.
Bill
On Sunday, February 24, 2019, 9:27:34 PM PST, tony wilson <tonyewilson@...> wrote:
I hate to shape a new cutting tool since there is so much material to grind away. I would like you forum members to tell me which wheel you use or which is the most aggressive. My old cutters are ground for my lantern tool post a couple are still usable but most need to be deep sixed.
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Re: Cross feed lever modification
I agree.? Very jealous of the tool grinder.? Dave didn't you mention somebody gave it to you or you got it super cheap and you rebuilt it?
-Jody
Also interested in the stuff in the cabinet behind the grinder.? Hehe!
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-------- Original message -------- From: "Bill in OKC too via Groups.Io" <wmrmeyers@...> Date: 2/24/19 6:28 PM (GMT-06:00) To: [email protected] Subject: Re: [atlas-craftsman IO] Cross feed lever modification Dave, you just triggered my TES (Tool Envy Syndrome) big-time!
Beautiful!
Bill in OKC?
Sent from my Sprint Phone.
-------- Original message -------- From: Dave Matticks <dpm100@...> Date: 2/24/19 12:37 PM (GMT-06:00) Subject: Re: [atlas-craftsman IO] Cross feed lever modification
Include anything you have, I love this stuff! I need to finish up my never ending carbide grinder project, getting there. Dividing head covering my bench and some Rockwell/Delta tumbler gears.? Thought about pulling the apron off my Atlas today for some engineering but nowhere to put it and I might need to use it a minute after I take it apart! Couple pics for fun.? Dave?
Sent from my T-Mobile 4G LTE Device
-------- Original message -------- From: Bill Williams <BWMSBLDR1@...> Date: 2/24/19 10:25 (GMT-06:00) Subject: Re: [atlas-craftsman IO] Cross feed lever modification
??? ??? Sun is out so too will I be! I will try to take some
pictures and measurements! Might include my "T" slotted table and
"No Cone" compound mount! Rigidity roughly quadrupled with this
upgrade! Also if you plan on a nice cast bracket as an upgrade
I'll take two! Could also provide castings if asked.? Bill
On 2/24/19 9:11 AM, Dave Matticks
wrote:
Hi Bill,?
I have ideas, just looking
for a few more including oem.?
Mine's in the basement but
it's a little crappy here too! 50 mph wind now and supposed to
be around 8° tonight!
Thanks, Dave?
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I believe 60grit is pretty common for grinding tools.? I've used 120grit when on parting tools because I'm still green in grinding bits and figure if I screw up, might as well screw up less with a less aggressive wheel.? LOL.
But I would thing 60grit should do the job.? Keep the water nearby. -Jody
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-------- Original message -------- From: tony wilson <tonyewilson@...> Date: 2/24/19 11:27 PM (GMT-06:00) To: [email protected] Subject: [atlas-craftsman IO] new cutting tools I hate to shape a new cutting tool since there is so much material to grind away. I would like you forum members to tell me which wheel you use or which is the most aggressive. My old cutters are ground for my lantern tool post a couple are still usable but most need to be deep sixed.
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I hate to shape a new cutting tool since there is so much material to grind away. I would like you forum members to tell me which wheel you use or which is the most aggressive. My old cutters are ground for my lantern tool post a couple are still usable but most need to be deep sixed.
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Re: Cross feed lever modification
Dave, you just triggered my TES (Tool Envy Syndrome) big-time!
Beautiful!
Bill in OKC?
Sent from my Sprint Phone.
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-------- Original message -------- From: Dave Matticks <dpm100@...> Date: 2/24/19 12:37 PM (GMT-06:00) Subject: Re: [atlas-craftsman IO] Cross feed lever modification
Include anything you have, I love this stuff! I need to finish up my never ending carbide grinder project, getting there. Dividing head covering my bench and some Rockwell/Delta tumbler gears.? Thought about pulling the apron off my Atlas today for some engineering but nowhere to put it and I might need to use it a minute after I take it apart! Couple pics for fun.? Dave?
Sent from my T-Mobile 4G LTE Device
-------- Original message -------- From: Bill Williams <BWMSBLDR1@...> Date: 2/24/19 10:25 (GMT-06:00) Subject: Re: [atlas-craftsman IO] Cross feed lever modification
??? ??? Sun is out so too will I be! I will try to take some
pictures and measurements! Might include my "T" slotted table and
"No Cone" compound mount! Rigidity roughly quadrupled with this
upgrade! Also if you plan on a nice cast bracket as an upgrade
I'll take two! Could also provide castings if asked.? Bill
On 2/24/19 9:11 AM, Dave Matticks
wrote:
Hi Bill,?
I have ideas, just looking
for a few more including oem.?
Mine's in the basement but
it's a little crappy here too! 50 mph wind now and supposed to
be around 8° tonight!
Thanks, Dave?
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Re: Cross feed lever modification
BTW, based upon an Atlas price list dated 01 Feb 1966 that I just acquired, we need to back up the introduction date of the 3985, 3986, 3995 and 3996 to at least Jan, 1966. ? Also, if you study the illustrated parts lists for the 3991 and the 3996, you will see that the apron itself is a different part number.? The shaft that fits into the gear that drives the gear on the cross feed screw is different, and has a bushing that looks like it was installed on the shaft before the shaft was peened into the gear.? This bushing is not shown on the 3991 list.? I don’t know whether it wasn’t there or was omitted from the list. ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Bill Williams
Sent: Sunday, February 24, 2019 09:38
To: [email protected]
Subject: Re: [atlas-craftsman IO] Cross feed lever modification? Dave, while it is just the standard 1968 OEM bracket, easily
adapted to earlier models I will be glad to take some pictures and send
them along. Shop is warming up so it should be soon!? Bill in (Frigid) CO
On 2/24/19 5:36 AM, Dave Matticks wrote:
Hi Bill,
Got a picture of it on your lathe?
I don't want a science project but a step up from bent sheet metal
should be pretty easy!
Dave
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Re: Cross feed lever modification
Here is a photo of one fellow's modification, believe this is an Atlas 10" lathe. Not my lathe.
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Re: Cross feed lever modification
Include anything you have, I love this stuff! I need to finish up my never ending carbide grinder project, getting there. Dividing head covering my bench and some Rockwell/Delta tumbler gears.? Thought about pulling the apron off my Atlas today for some engineering but nowhere to put it and I might need to use it a minute after I take it apart! Couple pics for fun.? Dave?
Sent from my T-Mobile 4G LTE Device
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-------- Original message -------- From: Bill Williams <BWMSBLDR1@...> Date: 2/24/19 10:25 (GMT-06:00) Subject: Re: [atlas-craftsman IO] Cross feed lever modification
??? ??? Sun is out so too will I be! I will try to take some
pictures and measurements! Might include my "T" slotted table and
"No Cone" compound mount! Rigidity roughly quadrupled with this
upgrade! Also if you plan on a nice cast bracket as an upgrade
I'll take two! Could also provide castings if asked.? Bill
On 2/24/19 9:11 AM, Dave Matticks
wrote:
Hi Bill,?
I have ideas, just looking
for a few more including oem.?
Mine's in the basement but
it's a little crappy here too! 50 mph wind now and supposed to
be around 8° tonight!
Thanks, Dave?
|
Re: Cross feed lever modification
??? ??? Sun is out so too will I be! I will try to take some
pictures and measurements! Might include my "T" slotted table and
"No Cone" compound mount! Rigidity roughly quadrupled with this
upgrade! Also if you plan on a nice cast bracket as an upgrade
I'll take two! Could also provide castings if asked.? Bill
On 2/24/19 9:11 AM, Dave Matticks
wrote:
toggle quoted message
Show quoted text
Hi Bill,?
I have ideas, just looking
for a few more including oem.?
Mine's in the basement but
it's a little crappy here too! 50 mph wind now and supposed to
be around 8° tonight!
Thanks, Dave?
|
Re: Cross feed lever modification
Hi Bill,? I have ideas, just looking for a few more including oem.? Mine's in the basement but it's a little crappy here too! 50 mph wind now and supposed to be around 8° tonight! Thanks, Dave?
Sent from my T-Mobile 4G LTE Device
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Show quoted text
-------- Original message -------- From: Bill Williams <BWMSBLDR1@...> Date: 2/24/19 09:38 (GMT-06:00) Subject: Re: [atlas-craftsman IO] Cross feed lever modification
Dave, while it is just the standard 1968 OEM bracket, easily adapted to earlier models I will be glad to take some pictures and send them along. Shop is warming up so it should be soon!? Bill in (Frigid) CO On 2/24/19 5:36 AM, Dave Matticks wrote:
Hi Bill,
Got a picture of it on your lathe?
I don't want a science project but a step up from bent sheet metal
should be pretty easy!
Dave
|
Re: Cross feed lever modification
On 2/24/19 5:36 AM, Dave Matticks wrote:
Hi Bill,
Got a picture of it on your lathe?
I don't want a science project but a step up from bent sheet metal
should be pretty easy!
Dave
|
Re: Cross feed lever modification
Dave, while it is just the standard 1968 OEM bracket, easily
adapted to earlier models I will be glad to take some pictures and send
them along. Shop is warming up so it should be soon!? Bill in (Frigid) CO
toggle quoted message
Show quoted text
On 2/24/19 5:36 AM, Dave Matticks wrote:
Hi Bill,
Got a picture of it on your lathe?
I don't want a science project but a step up from bent sheet metal
should be pretty easy!
Dave
|
Re: Cross feed lever modification
Hi Bill, Got a picture of it on your lathe? I don't want a science project but a step up from bent sheet metal should be pretty easy! Dave
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On February 23, 2019 at 7:39 PM Bill Williams <BWMSBLDR1@...> wrote:
??? ??? You certainly do better than the factory bent sheet metal bracket! Works fine but looks--eech! ??? ??? ??? ??? Bill in Boulder CO USA? has one!
On 2/23/19 11:03 AM, Dave Matticks wrote:
Don't know when they started, seen a couple videos but.... I'm with you, like it to look like it belongs there.? Not at the top of the list of projects but if I come up with something cool I'll share it. Dave On February 23, 2019 at 11:38 AM Kurt Sierens <ksierens@...> wrote:
I also think about this, but would want it to look like it came on the machine.
Kurt S.
Sent via the Samsung Galaxy S7, an AT&T 4G LTE smartphone
-------- Original message -------- Date: 2/23/19 12:32 PM (GMT-05:00) Subject: [atlas-craftsman IO] Cross feed lever modification
Hi Guys, Has anyone added/retrofitted a lever actuated cross feed to something similar to a 12X36 Atlas 3991? I have thoughts, all easy but open to ideas. On small stuff I just feed by hand at home or at work but don't like the "yank the knob" engagement. Thanks, Dave
?
?
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Re: Cross feed lever modification
Robert, I'm just thinking of the lever to actuate the power cross feed but the rest is all interesting! Thanks, Dave
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On February 23, 2019 at 5:15 PM "Robert Downs via Groups.Io" <wa5cab@...> wrote:
Dave, ? The following assumes that you were actually referring to a lever operated cross feed for the 3991. ? If you were actually referring to the lever actuated power crossfeed on the final version 12”, it can be retrofitted to the 3991.? You will need to drill and tap two holes in the apron plus acquire the necessary parts.? You might be able to buy them from Clausing.? And just ignore the rest of this. ? Otherwise, ? Up until about 1965, Atlas (or Clausing) sold what they called a Cross Slide Turret that replaced the standard cross slide and compound.? From the mid 1930’s until 1956, they sold a 10” and a 12” version (or they sold the 10” and Sears sold the 12”).? From 1957 until 1966 they sold a revised version for the 12” and although probably still available, the 10” wasn’t in the catalogs.? Anyway, as an option, they sold the No. 710 Lever Operator, which would fit your 3991. ? To see what it looks like, log into the A-C group on groups.io and go to Files.? Click on 28 Manuals, Atlas or Atlas-Craftsman Lathe Accessories.? Find and download Atlas Cross Slide Turret No. 6637 For Late12" .pdf?.? The lever and all of the parts associated with it are shown in there.? From the disassembly instructions prior to the lever assembly, I believe that one thing is missing.? I think that you will need to remove the spur gear and woodruff key that you will find on the cross-feed screw after you remove the bearing and then remove the screw. ? The link that ties the bottom of the lever to the apron attaches to an existing screw (or a slightly longer version of it) on the front of the apron. ? Probably the reason that the lever isn’t in the catalogs after 1965 is that the link would be in the way of the power cross feed lever that isn’t present on a 3991. ? ? ? Hi Guys, Has anyone added/retrofitted a lever actuated cross feed to something similar to a 12X36 Atlas 3991? I have thoughts, all easy but open to ideas. On small stuff I just feed by hand at home or at work but don't like the "yank the knob" engagement. Thanks, Dave
?
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Hi Jody , ? Just to follow up on my comment below – here is an extract from my Maximat manual which shows the faceplate , together with a shouldered pin which can be mounted in one of the faceplate slots to use the faceplate ?as a drive plate , ? Best regards, Carvel
?
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From: [email protected] [mailto:[email protected]] On Behalf Of cwlathes
Sent: 20 February 2019 02:02 PM
To: [email protected]
Subject: Re: [atlas-craftsman IO] Faceplate & Dogs? Hi Jody . . . wasn’t trying to correct anything and your description was spot on in terms of what you were wanting to do . . .?
A faceplate can be used as a drive plate either with a straight dog which engages a pin which has been bolted into one of the faceplate slots , or by using an angled dog which fits into one of the slots . . .
If using a straight dog and a pin make sure to wire the dog to the pin . . .
Best regards, ? Carvel ? From: [email protected] [mailto:[email protected]] On Behalf Of Jody
Sent: 20 February 2019 01:42 PM
To: [email protected]
Subject: Re: [atlas-craftsman IO] Faceplate & Dogs ? Carvel,
You are right to correct me.? The correct term would be driveplate for what I'm talking about.? So I'm looking for a driveplate and I can't imagine I would need one bigger than 6".? The reason I asked about dogs is that I've come across dogs that have a straight leg and it rides against a straight drive pin that is threaded into a driveplate.? There are some on Little Machine Shop.?? I don't really see if there is anymore versatility in that setup or not.? Just curious what guys were using and if a 6" driveplate is sufficient.
Thanks for correcting my terminology Carvel.
-Jody
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Mike Lutz
Bill Buckalew
Bill in OKC too
Steven H