[X7racer]

Normally I am the go to guy to know figure out what things are and how they work. Well someone brought me something from a closed down machine shop that I have not seen before, no marks, no part numbers, nothing to identify what or who made it.
What is known, Hardened steel, TiN coated,
Anyways I will spare you any more vague details, take a look at the pictures and help solve the riddle.
Attachment 182916
Attachment 182918
Attachment 182920
Attachment 182922

[eltejano]

Dude, those are parts from a couple of light sabers. So damn obvious.

[X7racer]

Wheres my head, I should have known that one, must have been used by some heavy duty mechbots, at 12 pounds each i don't think any of us would be swing these around for very long.

[samco]

Looks maybe like some sort of rotary shear for cutting strips of something?

[dertsap]

shredder rollers ?

[Superman]

They are internal broaching tools

possibly to do the large crank radius on an engine's con rod ( as an example )

Some other examples

[X7racer]

Glad to see I am not the only one that hasn't seen this before, shredder, maybe but doesn't seem to have enough cutting bite. I was leaning towards a broaching tool also or a reamer. One appears to have been used while the other doesn't, the one that has been used has minute scratches running parallel with the length of the rod. hmmm, anybody else?

[holbieone]

They are internal broaching tools

possibly to do the large crank radius on an engine's con rod ( as an example )

Some other examples

I'd have to agree with you

[X7racer]

I would most likely agree with it being a broaching tool of sorts, but what is confusing is the void in the middle and what appears to be a mounting hole. It does start out at a diameter of 1.705" and finally to 1.905" with each cutter increasing in size by 0.0075".
Would like to know what type of machine this would go to.

[Superman]

Would like to know what type of machine this would go to.

Used on a ram type of machine ( vert. or horiz. ) ...... PDF ... looks very similar


& a Chinese site with a few extra broaches to do the flat zones on the side ... link

these machines were a b$tch to maintain....so many sharp edges, Band-aids were always on backorder.
for each round "tooth", it would be plunge ground to be able to give it a back clearance, the nicks are a chip breaker, no nicks in the last couple of finishers
- used in a flood of neat, thick oil

I knew a guy that lost his arm ( just above elbow, early 70's ) by being too close to a horizontal ram type machine. Got it caught between the external stiffening webs of the slide & an outrigger on the base. Didn't even make the m/c skip a beat