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| bogstandard:
Very easily explained. Hand reamers when you can't get it on a machine to ream the hole. OR You've only got hand reamers in the size you want to use. Bogs |
| raynerd:
Ahh! - so since the majority of the work I have done could have been done by machine really I should be going down the route of purchasing and using machine reamers. Cheers Chris --- Quote from: bogstandard on August 02, 2009, 05:22:53 PM ---Very easily explained. Hand reamers when you can't get it on a machine to ream the hole. OR You've only got hand reamers in the size you want to use. Bogs --- End quote --- |
| Bluechip:
Hi Bogs & others .. I think the light may have come on .. Just been miking some reamers I have .. The hand reamers seem to have about 1" of lead on them. The 1/2" one does anyway. So ... If it has 6 cutting edges, I have circa 6" length of cut on. Not a lot of depth, but I would expect an awful amount of chatter if I did it on the lathe. I would not dream of attempting it. But, in effect, that's what I do using a Hand Reamer in the tailstock chuck. The 1/4" reamer with straight flutes appears to have virtually no lead at all. It's difficult to measure in practice. This is OK. Maybe that's the reason? If it is why didn't I think of that 38 years ago ? I have one very ancient 1MT 11/32" reamer. Got it with the Myford. Never used it 'cos never wanted a 11/32" hole. But, it reams brass beautifully. What a b*gger. It looks about worn out too, maybe Stew's theory about dubbed edges is right too. Tracy Tools will get an order tomorrow .. Live and learn .. Dave EDIT 2 MT 11/32" ! |
| Darren:
Here's my modest collection of reamers top four are hand reamers and the bottom one is a machine reamer. With an old bush on it to protect the flutes. The machine reamer is an adjustable type with a tapered screw in the end. I have used this one a lot. made about a hundred or so replacement bushes for record players. To use I simply drill the hole in the brass (I have used leaded PB1 and aluminum brass) and run this through at around 600rpm holding it in the tailstock. It's 31/64 or just under half inch. Never had a moments bother with it, it just does.... :dremel: I used this type because every bush, or I should say the shafting was slightly different in size and close tolerances were the order of the day. |
| Bernd:
Also reramers do not cut on the side flutes. The small chamfer on the end of the reamer does all the cutting. Also NEVER EVER run a reamer backwards in the work. You'll ruin it. These are my 2 cents worth of info on this thread. :coffee: So far from what I've all read you guys are doing quite good in sorting out all the tricks with reamers. For those with a chattering problem, I've heard and read that a lard, such as Crisco is good to use for a lube. Really don't know as I've never tried it. Bernd |
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