Oops, I was looking at the cross feed.

OK, I just looked at both cross feed screws and both are again 7/16-10 LH acme. I have one here if you want it, both the screw and the nut.

On Sat, Aug 15, 2020 at 11:03 PM Glen Linscheid <partsproduction@...> wrote:

Is your lathe a lot 4 or a lot 6? My lot 4 and lot 6 both have 7/16-10 LH screws. I didn't look to see if they were square or acme but I assume they are acme.

Here is one on ebay, $29.95;

On Sat, Aug 15, 2020 at 9:16 PM Joshua lee Franklin <franklinfixesall@...> wrote:

Another update from me and my Dalton 9 x 4 serial 90.05.? I'm looking for the nut for my compound slide or to find out what the thread count and size on that nut so that I can replace it. it's got some slop in it possibly the screw too although it does look pretty decent and since the nut is brass and I'm assuming since it's the softer metal that is going to wear first. Any insight would be much appriciated

Is your lathe a lot 4 or a lot 6? My lot 4 and lot 6 both have 7/16-10 LH screws. I didn't look to see if they were square or acme but I assume they are acme.

Here is one on ebay, $29.95;

On Sat, Aug 15, 2020 at 9:16 PM Joshua lee Franklin <franklinfixesall@...> wrote:

Another update from me and my Dalton 9 x 4 serial 90.05.? I'm looking for the nut for my compound slide or to find out what the thread count and size on that nut so that I can replace it. it's got some slop in it possibly the screw too although it does look pretty decent and since the nut is brass and I'm assuming since it's the softer metal that is going to wear first. Any insight would be much appriciated

Another update from me and my Dalton 9 x 4 serial 90.05.? I'm looking for the nut for my compound slide or to find out what the thread count and size on that nut so that I can replace it. it's got some slop in it possibly the screw too although it does look pretty decent and since the nut is brass and I'm assuming since it's the softer metal that is going to wear first. Any insight would be much appriciated

What planet did you guys come from. For one I use only high positive inserts on my lot 6 Dalton.? Second the mith about carbide on older machines is just bull shit.? Modern high positive insert tooling reduces the HP requirements on an old lathe by a hug amount.? Try taking a 1/8 depth of cut in steel on a Lot 6 Dalton with high speed or cemented carbide and you will either slip the belt or stall the motor.? I have taken heavier cuts with a Lot 6 using modern tooling than they ever did in the old days. Also doing this with a 1/3 hp motor.? Also you will learn to run at a much higher speed than you would with HSS and doing so get much better surface finishes.? For one if you really want to learn how to use a small lathe like the Dalton first get a good tool post.? I recommend the OXA size for all but the Dalton 9.? There are a number of nice seven piece high positive tool holder and boring bar insert sets available on eBay or little machine shop.? Use the 3/8 or 10 MM size tool holders.? The inserts that come with these sets are not the best but they are a good start and there are many kinds of inserts out there that will do just fantastic jobs of accuracy surface finish and stock removal rates on your little machines.? So I am off the soap box now. Oh and also Herb I recently sold my company but it is a high tech job shop with over 50 CNC machines very few conventional machines and doing work that you cant even imagine.? Just for starters lets see you thread mill 080? in 6AL-4V titanium.? We were the first company in the world to do so so I do have a bit of experience in what it takes to get a job done and out the door. Turk Mfg specializes in the ultra high vacuum industry or for the lay person we built electron and Ion guns for the computer ship industry. My company also had three clean rooms on site for some really interesting high tech assembly for the vacuum industry. I see Glen has posted on the thread so ask him he has been to the business i just sold.

Dennis

On Wednesday, July 29, 2020, 01:07:07 PM PDT, Glen Linscheid <partsproduction@...> wrote:

?Please roll with your own interpretations Herb, I agree that high HP and speeds are needed for production high volume machining, but often carbides and ceramics are the only way to cut some materials. I use carbides all the time both at carbide speeds and lower speeds for one off jobs, simply because my time is too valuable to waste grinding HSS and replacing a carbide insert puts you back within .001" normally of where you were when you swapped. I can't believe any experienced machinist doesn't understand relief angles to grind HSS, as there ARE times when HSS is the only way to do some jobs.

?Of course my own practice is to never use lighthouse style holders, and I'd agree, for those who do, it's probably not normally wise to use carbide, as most available carbide tools that would fit are the brased on type, and it's very hard to replace the tool with the precision one gets with QC toolposts and holders and carbide inserts.

?Threading with laydown inserts I find works better than HSS even at slow speeds, in fact other than CNC threading much manual threading is done at lower speeds with "In the white" color chips even with carbide.

?Granted we have hundreds of old carbide inserts in boxes with one or more new edges remaining, so it's not a matter of money for us. It does require more skills and/or experience to thread with carbides if the operator has trouble timing his exit.

?Having said all that let me say that if you are most comfortable using HSS it's all good, I'm not advocating one way or the other as much as saying there are ways to use carbide inserts that are better in my opinion even with a slow and wimpy old lathe at times.

With respect,

Glen

On Wed, Jul 29, 2020 at 12:17 PM Herb Kephart <ebtm3@...> wrote:

To successfully employ carbide, you need 2 things--Horsepower, and rigidity. Daltons are a fine little lathe, but they were designed in an era (after the first world war) when high speed steel was replacing carbon steel tooling. We have 5 conventional lathes here, and 1 CNC. Carbide all ways on the CNC Mazak, the others (up to24" monarch) only sometimes. As far as roughing, and removing the most metal in the least time, here is heat treated 4340 and a HIGH SPEED TOOL

Lathe is a 16" Lodge and Shipley, 5HP spindle. Piece was part of a Stanley Steam car engine crankshaft. You didnt make me angry, my only reason for posting is to try to get fledgling machinists to realize that I think too many folks are starting out with carbide, when they would be better off with cheaper tooling.

Herb Kephart

---

From: [email protected] <[email protected]> on behalf of Glen Linscheid <partsproduction@...>
Sent: Wednesday, July 29, 2020 2:12 PM
To: [email protected] <[email protected]>
Subject: Re: [DaltonLathes] Max & recommended shaft rpm

?

I don't mean to be contrary or make anyone angry but a good machinist knows when to use either HSS or carbide.

On Wed, Jul 29, 2020 at 10:40 AM Herb Kephart <ebtm3@...> wrote:

If you only have one lathe, set the lowest speed so that a piece about 6" in diameter will run at about 40? surface feet a minute. This is the maximum speed for cast iron. let the maximum speed for the machine be whatever it turns out to be.

Forget about carbide--learn to sharpen high speed steel toolbits. You will be much better off financially and more of a machinist

Herb Kephart

?

To successfully employ carbide, you need 2 things--Horsepower, and rigidity. Daltons are a fine little lathe, but they were designed in an era (after the first world war) when high speed steel was replacing carbon steel tooling. We have 5 conventional lathes here, and 1 CNC. Carbide all ways on the CNC Mazak, the others (up to24" monarch) only sometimes. As far as roughing, and removing the most metal in the least time, here is heat treated 4340 and a HIGH SPEED TOOL

Lathe is a 16" Lodge and Shipley, 5HP spindle. Piece was part of a Stanley Steam car engine crankshaft. You didnt make me angry, my only reason for posting is to try to get fledgling machinists to realize that I think too many folks are starting out with carbide, when they would be better off with cheaper tooling.

Herb Kephart

---

From: [email protected] <[email protected]> on behalf of Glen Linscheid <partsproduction@...>
Sent: Wednesday, July 29, 2020 2:12 PM
To: [email protected] <[email protected]>
Subject: Re: [DaltonLathes] Max & recommended shaft rpm

?

I don't mean to be contrary or make anyone angry but a good machinist knows when to use either HSS or carbide.

On Wed, Jul 29, 2020 at 10:40 AM Herb Kephart <ebtm3@...> wrote:

If you only have one lathe, set the lowest speed so that a piece about 6" in diameter will run at about 40? surface feet a minute. This is the maximum speed for cast iron. let the maximum speed for the machine be whatever it turns out to be.

Forget about carbide--learn to sharpen high speed steel toolbits. You will be much better off financially and more of a machinist

Herb Kephart

?

If you only have one lathe, set the lowest speed so that a piece about 6" in diameter will run at about 40? surface feet a minute. This is the maximum speed for cast iron. let the maximum speed for the machine be whatever it turns out to be.

Forget about carbide--learn to sharpen high speed steel toolbits. You will be much better off financially and more of a machinist

Herb Kephart

?