Some Machinist "What is it's"

[Boogerman]

Sorting out machine shop tooling I bought to supplement/stock my own shop. Lot things I don't recognize. Thought I call on collective knowledge here. A couple things ran into today, sorting:

 

[Erikwis]

First could be used in a vise to mill small round stock. Gang setup.

 

[DocsMachine]

Somewhat of a guess, but I think Erik is mostly there. It's a "gang" fixture to hold five small pins at once. There was probably a second part that went over the top, 'hooking' into those square notches in the ends, holding a row of bolts or setscrews so each clamp could be closed individually.

I'd have originally thought it went to a surface grinder- and there's a good chance it did- but the holes in the large lower plate suggest mounting in a Kurt style vise as a jaw.

Probable uses include milling flats on the pins, or milling/grinding to length.

The second item is essentially a custom-made sine bar, and the square groove suggests it was made for grinding tool bits.

Doc.

 

[Boogerman]

Thanks, Guys. So, essentially purpose built scrap metal at this time.

 

[AmericanMechanic]

Thanks, Guys. So, essentially purpose built scrap metal at this time.

The sin bar would be useful at times. For example if you wanted to tram an adjustable angle plate to 41.3° set up the sin bar for the complimentary angle (48.7°) and adjust until your indicator shows no movement when traversing the table.

How practical is it to hold the bar and blocks in place at an angle? Not sure.

Could be other uses - e.g. orienting a part on the table at 78.4° from the x-axis. Use the sin bar relative to a known true reference.

 

[paulsomlo]

How large of a round will fit in those vees?

 

[Boogerman]

How large of a round will fit in those vees?

Went out and tried it, a 1/2" fits comfortably.

It very nice jig. Was surprised how nicely works, slides up and down on guide pins perfectly. Makes sense, guy owned shop was very high end mold maker; in stuff from the shop hundreds of guide and ejection pins and bushings. The jig is built the same way as mold halves, with the pins allowing the keeper to move up and down smoothly but remain captive to base. I'm really tempted cut off one bay to use. Of course, I can use full 5 bay piece for just one, but be more clumsy.

 

[Rinspeed]

That's what we call a fixture.

 

[Boogerman]

Person make homemade sine bar, really ought to stamp radius and constant on it; make easier use.
Looked in V blocks I sorted out, had two more single fixtures like the 5 station one; two different sizes. Nice "automatic" vee block, don't need yoke.