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View Full Version : Large spiral taper reamer



bob ward
06-05-2013, 06:21 AM
Today I was given this large (by my standards) spiral taper reamer. It has an MT3 drive, its large dia is 53mm, small dia is 42.5mm, length is 76mm, included angle by calculation is 7.5.

Does this type of reamer have a special name and where were they typically used?

http://i237.photobucket.com/albums/ff28/sirrobertthegood/IMG_0045-1_zps8988cdff.jpg (http://s237.photobucket.com/user/sirrobertthegood/media/IMG_0045-1_zps8988cdff.jpg.html)

CCWKen
06-05-2013, 08:05 PM
I was about say pipe thread reamer but the angle is too great. BIG stuff! Can't help but to give it a bump.

davidwdyer
06-05-2013, 09:59 PM
That looks like something which could clean up the taper in the head of my South Bend.

boslab
06-06-2013, 12:47 AM
Think I saw one being used on boiler end plates where the tubes are supported on the TV a long time ago, it was set up in a large arch dale radial arm drill, looks like a big core drill so perhaps similarly named ? Core reamer, plug, but just guessing, my feeling is that it would not take the torque of heavy cutting so it must be a light finish operation tool otherwise it would have a bigger MT on the end, I have several reamers up to 3" that are MT5 and more, but I have not got a lathe at home to use them in anymore, the old engineering workshops where I haunted had big ol cravens and DSG lathes that would snap them like 1/8" drill bits if you screwed up.
Mark

Davidhcnc
06-06-2013, 05:40 AM
You should sharpen it before you use it...:o

J Tiers
06-06-2013, 08:46 AM
It can't be for particularly heavy-duty use, the tiny taper shank wouldn't hold it. most likely. (As if MT3 is "tiny"). The leverage of the reamer against the friction in the taper looks like an unequal fight.... So it should be a finish reamer , if that helps any.

Look for things that take that taper....No idea what they might be.

bytewise
06-06-2013, 10:30 AM
It might be a finish reamer for a large quarter turn plug valve.
Hugh

JRouche
06-06-2013, 12:03 PM
De-burring tool? JR

michigan doug
06-06-2013, 04:44 PM
Nose hair trimmer, as seen on tv.

doug