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Old 12-13-2006, 12:02 PM
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What are these used for?

I have been cleaning out my Dad,s garage and found these.They are Blue Point.It looks like something to reem a hole out with it.

http://i77.photobucket.com/albums/j4...rd/tool002.jpg

http://i77.photobucket.com/albums/j4...rd/tool001.jpg

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Old 12-13-2006, 12:08 PM
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Looks like bushing reamers to me..used when we installed the old fashined bronze bushings for shafting ..reams the bushing to the correct size for the shaft..

That is my best guess..

Sam
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Old 12-13-2006, 02:11 PM
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I believe those are adjustable reamers, we learned about them in a class I'm taking at Penn tech. they are for making "accurately" sized holes, but their accuracy is questionable as they are adjustable and very difficult to set to the proper size when working with tight tolerances. I don't know why the shanks are so long. to use them you drill a hole around .005 to .010...(if i recall right...i'll bring home my hand book tomorrow and tell you for sure.) under the size of the finish diameter of the hole. set the size of the reamer with a micrometer then chuck them into your drill press or milling machine and use them just like you would a drill bit only at half of the recommended rpm. or you can turn them by hand with a wrench or tap handle. keep ahold of them, they are not cheap.

Last edited by leldai73; 12-13-2006 at 02:19 PM.
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Old 12-13-2006, 03:59 PM
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They are adjustable reamers.

They should only be used by turning with a wrench by hand.

If they are turned by machine they will grab and break unless the RPM is very, very slow. Slower than most machine tools will operate.

leldai73 posted correct info with the exception of putting them in a chuck in a drill press or milling machine.

There are adjustable reamers that can be used in machine tools but what you have are not the ones.
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Old 12-14-2006, 01:02 PM
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correction of my previous post for holes up to .500 leave .015. and for holes bigger than .500 leave .030.

frisco, how can you tell the difference between an adjustable reamer that can be used in a machine tool and one that can not?
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Old 12-14-2006, 07:33 PM
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Thanks for the replies.I,ll hang on to them.
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Old 12-14-2006, 07:56 PM
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adjustible reamers

Quote:
Originally Posted by leldai73
correction of my previous post for holes up to .500 leave .015. and for holes bigger than .500 leave .030.

frisco, how can you tell the difference between an adjustable reamer that can be used in a machine tool and one that can not?
The machine reamers have a round shaft to chuck into the machine (mill or drill press) and to expand the reamer a few thousands there is an allen screw at the bottom. There are also non adjustable reamers. They must be ordered to the exact size...russ
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Old 12-14-2006, 08:04 PM
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Quote:
Originally Posted by leldai73
correction of my previous post for holes up to .500 leave .015. and for holes bigger than .500 leave .030.

frisco, how can you tell the difference between an adjustable reamer that can be used in a machine tool and one that can not?
Most hand reamers have the straight cutting blades as shown in the photos. There are hand reamers available with spiral (helix) cutting edges also. Hand reamers also will have a square on one end of the shaft.

Machine adjustable reamers usually have spiral (helix) blades and/or are one piece rather than individual cutting blades. Machine reamers will not have the square on the end of the shaft. Non-adjustable machine reamers can also be found with straight or helix cutting edges.

On the hand reamers the individual blades are adjusted by loosening the locknut on one end and tightening the locknut on the opposite end. As this is done the individual cutters move up (or down) a tapered section of the main shaft below the blades thus increasing or decreasing the cutting diameter.

On the machine adjustable reamers the adjustment is done by tightening or loosening a setscrew in the bottom of the reamer which when tightened effectively shortens the length of the reamer and "bows" the mid section to increase the diameter. This adjustment will only yield a few thousands of an inch increase.
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Old 12-14-2006, 08:18 PM
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The reason they are long is to align with another hole. Like king pins in spindles. Both holes have to align. That is what the tapered sleeve is for you see on the long shaft.
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Old 12-14-2006, 08:22 PM
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Yep---I use the adjustable ones at work to fit pins or shafts into pressed in bronze bushings, on the equipment i work on.

Bryan
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Old 12-14-2006, 10:19 PM
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I recently found a 10 peice set of those at a swap meet. Old timers made in USA in a wooden box. It goes from 7/16 all the way up to 1 3/16"
I paid 175.00 for my set and feel like I got them for cheap. The blades are still available.

I find they are VERY handy around the shop for making stuff fit.

The one I got looked just like the one on the left.


http://www.mcmaster.com/ catalog page 2368
Later, mikey
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