Re: New to me SB 10 Heavy, need help with identification


Bill in OKC too
 

They do very different things. Morse taper accessories, for example, including centers, are best finished with a tool post grinder, where a surface grinder is best for things like 1-2-3 blocks, gibs for machine ways, etc. they both give very fine precision surfaces, but the tool post grinder does cylindrical and tapered round objects, where the surface grinder does flats. If you're making a bunch of tooling from scratch, you probably need both. If you mainly do lathe work, you probably need a tool post grinder, while mostly flat stuff like 1-2-3 blocks, angle blocks, v-blocks, squares and that sort of thing, a surface grinder is what you need. And what you need is dependent on what you're doing. I'm ambitious to be able to make things most folks would just buy. 

One very common use for a tool post grinder is for truing centers for between-centers work on the lathe to get the absolute best accuracy and concentricity. 

Despite the fact that I took a professional course in machining, they did not teach turning between centers, nor use of a tool post grinder. Frankly, I felt cheated, but I did read all about it in some of the old books on machining on the lathe, so I at least know some of the theory.

Bill in OKC

William R. Meyers, MSgt, USAF(Ret.)

Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement. 
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better



On Saturday, July 30, 2022 at 07:56:19 PM CDT, mike allen <animal@...> wrote:


        I have a tool post grinder an Atlas , which I have never used as of yet . I could see a surface grinder coming in handy a lot more than the tool post grinder . But I could just be pounding sand

        with that statement . For folks with either grinder which do you use more often & for what job ?

        thanks

        animal

On 7/30/2022 3:16 PM, Bill in OKC too via groups.io wrote:
I knew I wasn't going to be able to afford one for my hobby shop, but was interested in how badly I couldn't afford it. Found a place that lists the SuperJet-S kit for oxy-acetylene deposition for only about $3300, which was actually a lot better than I expected, though still way out of my range! ;)

My Lewis shaper countershaft system had been "repaired" with braze, and apparently new bearings at some point in its life. The installed bearings when I got it were metric, which I didn't figure out until after I'd made a 5/8" shaft for it, a couple of times. This was back when I was having to do at least two or three tries to get a project right, at a minimum. First one, I used a chunk of mystery metal, and found that there was a kink in it. It turned properly, but there was a curve in the narrowest portion of the shaft. Roll it across a surface plate, and it would make exactly one revolution before stopping. I neglected to check that it fit the bearings until after I had the 2nd try complete. Nope, too small. The bearing ID was 15.98mm or 0.629", so 0.004" too large for the shaft. My 3rd try is closer, but I still goofed it up enough that I'll need to put Loctite on the shaft...

One of these systems would be perfect for making the 2nd or 3rd try work after all! :)

One of these days, I want to have a surface grinder, and a toolpost grinder, in addition to the lathes. That day is not today, however!

Hi! My name is Bill, and I'm a toolohaulic! I don't want much, just at least one of each of every took ever made, and a large enough shop to be able to keep everything organized. Better I not hold my breath waiting for that! :)

Bill in OKC

William R. Meyers, MSgt, USAF(Ret.)

Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement. 
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better



On Saturday, July 30, 2022 at 03:28:27 PM CDT, Ray De Jong via groups.io <dejongray@...> wrote:


Its been around for a while; in 1970something I bought one (Eutectic Castolin) for  the shop i had at the time and with quite an array of different powdered metals. it became a very good money-maker and saved a number of expensive parts from the scrap heep. The parent material being a shaft, wear surface or other is prepared with a very rough surface so the spray weld will 'stick' better then the part is preheated , depending on the parent metal ie. tubman-bronze, stainless, etc.
then the spayweld is applied by use of the special torchwith the attached powded metal hopper. After which the finish is performed. On a wear surface I usually used a shaper or mill, or both. On pump shafts for example, the lathe and often tool post grinder were the choice. Anyway that was my experience 

On Saturday, July 30, 2022, 04:14:21 AM PDT, Greg <condor6213@...> wrote:


"oxy/acetylene spray welding"? That's a new one on me. But sounds intriguing.

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