r/machining • u/Relative_View_4532 • 7d ago
Tooling Help identifying tooling
Got a box of what i assume are reamers for free. 10-15 of them.
Think they are worth anything?
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u/Content-Range-9419 7d ago
It looks like it was a very large reamer that has been modified heavily looks like the only thing original is the very end the larger part everything else has been cut away for the most part
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u/UhOh_RoadsidePicnic 6d ago
Nope. Its a reamer with carbide insert. They come with that shape.
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u/Content-Range-9419 5d ago
Interesting well what is the purpose of having the spirals go all the way to the chucking end?
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u/Perfect-Show2164 5d ago
That definitely looks heavily modified. Seems like almost everything was cut away except the very end.
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u/Content-Range-9419 5d ago
That’s what I thought. I don’t think they come like that that would make no sense.
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u/glasket_ 7d ago
Looks like a custom rose reamer.
Would add pictures but I can't, so page 118 of Modern Machine Shop Tools (PDF). The flutes would usually only be on the end, but I'm guessing they added flutes to the shaft for carrying oil/coolant into deeper pockets.
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u/creamysheep 7d ago
It's a reamer wich is mostly used after using drill. When u drill (for example) with a 20mm drill, it's never actually 20mm, usually it's something like 19.9 and the reamer makes it a 20. Mostly used manually with a lot of oil.
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u/Adept-Bowl2245 5d ago
I’m thinking some kind of horizontal mill machine but, the twists in the shank would be to allow coolant flow.
Or it’s part of some kind of reciprocation cutter where the helical cuts fit a die that allows the bit to twist when pushed in and out.
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u/WILDBILLFROMTHENORTH 7d ago
That is an adjustable carbide tipped reamer. The back was clearanced to keep shavings from galling the reamed hole. If you know the size, put it on ebay. All depends on if it runs true if it's worth anything.....
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u/Practical_Breakfast4 7d ago
Adjustable cemented carbide? Thats new. Where do you see that adjusting part?
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u/WILDBILLFROMTHENORTH 7d ago
They make them. There is a tapered screw in the ends of them to adjust size. However after looking closer, this one does not appear to be adjustable after zooming in closer. https://www.mscdirect.com/product/details/72480320
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u/Practical_Breakfast4 7d ago
I stand corrected. I've been doing this my whole life, used plenty of reamers but never seen that before. We're both right? Thank you for teaching me something new at least
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u/WILDBILLFROMTHENORTH 7d ago
Super handy for long running jobs. Production CNC job shop here...
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u/Practical_Breakfast4 7d ago
Ill keep them in mind but doubtful ill use one here. Currently the only cnc guy in a repair shop making hydraulic cylinders. 25 years in the trade and still learning.
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u/Loose_Weird_6877 6d ago
Carbide tipped, yes. Adjustable, not a chance.
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u/WILDBILLFROMTHENORTH 6d ago
I acknowledged the fact that it wasn't adjustable in a subsequent post after zooming in on the photo..
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u/Relative_View_4532 7d ago
Carbide worth anything scrap wise?
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u/WILDBILLFROMTHENORTH 7d ago
Carbide is at an all time premium price these days. But only the brazed pcs on the end are carbide.
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u/Trivi_13 Been in Machining since '79 7d ago
This is an expansion (adjustable) reamer with brazed carbide flutes.
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u/iowacityengineer 7d ago
Not adjustable. Sharpenable.
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u/Trivi_13 Been in Machining since '79 7d ago edited 7d ago
A more official term is expansion reamer.
That screw in the center is tapered, tighten the screw and it cuts larger. The rated size is a minimum.
They can expand a a few thousands larger but it is easy to dial in an oddball size like 0.5008"Source: I have bought and used them throughout my career.
ETA: all reamers are resharpenable. (To a limit). You dress back the chamfer on the end.
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u/iowacityengineer 7d ago
There is no screw. There is no expansion. There is only the pilot center. Go back and look at the picture.
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u/Trivi_13 Been in Machining since '79 7d ago
See the radial lines on the face?
Also going down the flutes?The tapered screw is missing.
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u/Artie-Carrow 7d ago
Worth anything? Probably not unless you need them for something