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Does anyone know what the MT of an old Rockwell 10" lathe is? I have the manual but cannot find the info in it.

Much thanks to all for your comments and especially the pictures as I see my errors now. I thought about redoing the crosshead as per the drawing but I believe the way that I have it now may work and I kind of like the looks of it. I can always redo it if a problem presents itself. I am making a...

Perhaps I did not make my point clearly so will try again...if I followed the dimensions on the drawing correctly, and it is possible that I did not, there is no way the model can work. This image shows the crosshead as per the drawings. The piston rod is at the bottom of the crosshead. The...

My first venture into model machining and I have an issue. What am I missing with the figures for this item?

Thanks for the info Brian and for responding. I had the idea of the different materials in the back of my mind but thought there must be a reason that PMR would use brass. BTW, I enjoy your postings, they are quite interesting.

In a cast brass cylinder, should one use brass or steel for the valve? Is one better than the other? I have a PMR #3 that I have started on and since this model engine building is new to me I like to make a prototype with on-hand materials. I just made a valve from some old 3911 steel but not...

Great idea, it certainly looks stable.

Well, after changing my mind 14,319 times, I decided on the PMR #3 which came today. It is my first kit so have nothing to compare it with but I am impressed with the quality of the castings. Next comes studying the drawings to decide where to begin, first thought is the base. Thanks to...

Thanks for the offer dazz but I am keeping my Trump hat.

It has been worth every bit of the effort to build. Good luck with your idea.

Sorry I failed to state that, it is 8". I would like to offer a brand name but cannot find one on it anywhere.

Please forgive me if this is not the appropriate group for this question. I have a 3-axis rotary table that I plan on listing on Craig’s list or possibly eBay but have no clue what price I should place on it. I would be most grateful if someone would opine as to a fair value of this tool. It is...

Thirty to forty some odd years ago when I was doing some basic gunsmithing it became obvious that I could not afford the number of 6-48 taps that I was going through. Someone had posted pictures of this unit that looked to me as it would be of great benefit to me, and that proved to be so. I...

Hello everyone, I am looking for an idea for mounting the Z-axis scale of a DRO on an old Grizzly (g1008) small knee mill. The X and Y were not a problem and I have the Z mounted, just not fond of how it is mounted. I'm wondering if it may be better to go back to the dial indicators that I have...

Thanks for the info Dave...it is good to know that I can remember some things. The c1139 that I have was purchased from a local scrap yard/metals/equipment company in Billings, Montana in the early to mid-seventies. It was a very old company so no telling how long the stock had been in their...

Has anyone ever heard of C1139 cold rolled? Back 45 years or so when I was making reloading tools I used what I recall as c1139 but I cannot find any reference to it now. It seems to be very close to 1144. I still have some .75, 1, 1.25 and as I remember it was fairly low in carbon but would...

Thanks for the suggestion Peter, looks to be a very good book. Unfortunately, I am not willing to spend that kind of money on a book at this time, perhaps later.

I have looked at some of the casting kits but not for a first project...a concern about making an error. Bar stock is much less expensive than the casting kits, at least the ones that I like. This one is my favorite at this time...

Thanks for the suggestion Ken, I am in a very preliminary stage and at this point, nothing is set in stone. My original selection is still at the top of the list but that could change.

A very impressive project!