PM Research #3

Home Model Engine Machinist Forum

Help Support Home Model Engine Machinist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
I get a lot of use in setting angles with what I call a level box? It's a small 3"x3" +/- plastic device that measures angles to less than a degree. Someone will no doubt post the proper name and source. It seems accurate enough for my work.
 
Wow - coming along great. I really like your fixturing approach. I am going to use some of these in making my own engine. Top work.

The screw machine is a beast - what vintage is that?
That screw machine is small ⅝ inch capacity, single spindle....vintage? this one is mid to late 1950's
 
Wow - coming along great. I really like your fixturing approach. I am going to use some of these in making my own engine. Top work.

The screw machine is a beast - what vintage is that?
Thank you sir......the fixture approach was the only logical way I saw to both hold the work, and always have/ be able to find/pick up a master reference.
 
I get a lot of use in setting angles with what I call a level box? It's a small 3"x3" +/- plastic device that measures angles to less than a degree. Someone will no doubt post the proper name and source. It seems accurate enough for my work.
I don't have a digital protractor......up until now, I have a much larger mill with a 6 inch vise and all I ever needed was my sine bar, however now that I have a smaller machine & vise, a tool like you own might have to be had for the shop
 
So I got a little farther.....being how I couldn't use a 5 inch sine bar in a 4 inch vise, I had to go with plan B.....make a sine block.......I blued the work, leveled it to the vise jaws by eye.....cut it, placed it back on the sine bar, sweep it with an indicator, off .007 , that's with in a couple minutes of arc.....close enough for this, I'm just drilling steam passages View attachment 165554View attachment 165555
For small parts you could use a small vise upside down. Then after clamping the small vise goes into the bigger one.
upsidedown.jpg

I hope one can get the idea from my quick sketch. Ofcourse the angle is reversed 90° - x.


Greetings Timo
 
That's funny....uuhhh, no. For certain parts , a screw machine will run circles around a CNC......
I just have some of these in mind. I guess they cannot cost more than 1 or 2 stellar bucks. Happy programming. :cool:
There seems to be never a video where a real part is made. I guess, because all we could see, is coolant mist or oil fumes.

 
Last edited:
I just have some of these in mind. I guess they cannot cost more than 1 or 2 stellar bucks. Happy programming. :cool:
There seems to be never a video where a real part is made. I guess, because all we could see, is coolant mist or oil fumes.


The cnc version of the screw machine......wow there's a lot going on with machine
 
The cylinder came out absolutely flawless! I waited to separate the casting from the fixture until our machinist club meeting, I was asked to give a presentation on fixturing. Turns out several of our members want to do a casting kit but had(have) no idea where and how to start, so this will lead into a presentation on casting layout and fixturing.....but in the meantime here is the completed cylinder
Resized_Resized_20250316_085230_1742129568478_1742129570697.jpeg
Resized_Resized_20250316_085235_1742129568791_1742129570801.jpeg
Resized_Resized_20250316_085217_1742129567836_1742129570533.jpeg
Resized_Resized_20250316_085225_1742129568158_1742129570578.jpeg
 
Not much has gotten done on the engine, my big project crossed a couple of hurdles yesterday, one of my closest dearest friends is an awesome wood worker kinda guy, he got an extreme entry-level CNC router......after a month or more of Hi trying to learn this machine, I was called and tasked with please help, he could jog the axis, after that, can't figure out how to drive the machine, create a program, load the program ect.....a 100 pou d paper weight.......dive to Lima Ohio, 15 mins later, I hand keyed a program in and the machine roared to life.......now to teach him.......
 
I did find time to make the valve , if you remember I reamed the steam chest at .251, and decided the valve will be made from ¼ drill rod. A perfect fit.....unfortunately I forgot to take pictures of the stock in the lathe, but my guess is you know what a drill rod in a collet looks like......
Resized_Resized_20250308_153618_1741467772375_1741467774217.jpeg
Resized_Resized_20250308_155740_1741467772901_1741467774248.jpeg
 

Latest posts

Back
Top