Reamers For Donation

We have to pay the bills, but at times it seems work is never done. Thank you for your support and work on this and the site. .
 
props to both dlane for the donation and Ulma Doctor for taking the time out of a busy life to do this, it's much appreciated!

Much like everybody else, 3/16, 1/4, 5/16, possibly 3/8 (might have one of those) and 1/2 would be really useful, especially if there are any 0.001 over ones. Main purpose would be to make tool holders and collets. Possibly one larger one for making a toolpost + holders. If those are all taken, no worries as I'm not in the precision business anyway :)
 
Actually, reamers are typically back tapered, so technically you cannot sharpen a reamer without changing its size. It is a miniscule amount and for practical purposes can be ignored, but you should be aware of it.
 
If there are any left over , sign me up, I thought I had already posted but apparently memory goes right after the waistline.

cheers
michael
 
Tony Wells said:
Actually, reamers are typically back tapered, so technically you cannot sharpen a reamer without changing its size. It is a miniscule amount and for practical purposes can be ignored, but you should be aware of it.
Click to expand...
Tony, I have never heard of a reamer typically having a back taper? And I just miked a few of my machine & hand reamers. None of them have any back taper? Is this something that just Texas machinist do?...Dave.
 
No, it's pretty standard in the industry, actually. It keeps the edges that aren't actually doing any cutting from simply rubbing and adding to the driving friction and prematurely dulling, and in some cases more than a couple of tenths is used in situations where alignment is off in the holder to prevent the back of the reamer from cutting and oversizing the hole. Those cases may require 0.005-0.010/inch taper. I can't recall having to use that much taper, but 0.0002/0.0003 is pretty common.

Several references on cutting tools I found on line discuss it.
 
Thanks Diane for the donation. And a big thanks to ulma doctor for his time in selling the readers to benefit the forum.
Looks like a big pita to me , but I've been told I'm a
Thanks ron
 
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Hi Guys thanks for the kind words.
we are doing this for the forum.
yes, it it time consuming and tedious- but i believe in the greater good and keep on plugging along.
heres what i have so far:
i have identified and classified 91 reamers into letter, number, fractional, decimal respectively
i have a batch of 14 reamers that are unclassified, some without inscription- further measurement is necessary.
here's the list


1 #50 1 #18 2 7/32 1 S 2 45/64 1 .3745"
1 #37 1 11/64 3 #1 1 3/8 1 3/4 1 .4385"
1 7/64" 1 #15 1 A 1 V 1 55/64 MT2 TAPERED SHANK 3 .4990"
1 #31 1 #13 2 C 1 W 1 57/64 MT2 TAPERED SHANK 1 .9531 MT3 SHANK
2 1/8" 3 3/16 3 F 1 X 1 1" MT3 SHANK
2 #30 6 #11 2 G 1 7/16 2 1 -1/16" MT3 SHANK -MODIFIED
1 9/64 1 #10 2 17/64 1 29/64 2 .1240"
1 #27 1 #9 1 J 1 1/2 1 .1385"
1 #26 3 #8 3 K 1 17/32 1 .1565"
1 #24 1 #7 1 N 1 5/8 1 .1855"
1 #22 1 #6 1 Q 1 21/32 1 .2550"
1 #20 2 #4 1 R 1 11/16 1 .2885"
 
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