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Author Topic: My Attempt  (Read 23802 times)

Offline Stilldrillin

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Re: My Attempt
« Reply #25 on: July 21, 2009, 12:44:55 PM »
Dave,

There`s no answer to that........ From me!  ::)

The other Dave.
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline NickG

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Re: My Attempt
« Reply #26 on: July 22, 2009, 09:28:45 AM »
Dave,

I've never sucessfully reamed anything either. Like you say, have tried both ways, leaving very little material and making it work much harder and can't get either right. Not sure whether it's speed, feed, lubrication or what.

Nick
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Offline Bernd

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Re: My Attempt
« Reply #27 on: July 22, 2009, 10:22:07 AM »
Quote from: NickG on July 22, 2009, 09:28:45 AM
Dave,

I've never sucessfully reamed anything either. Like you say, have tried both ways, leaving very little material and making it work much harder and can't get either right. Not sure whether it's speed, feed, lubrication or what.

Nick

Nick,

It's all three of those factors that you mention.

I usally manualy feed the reamer. So can't give you a feed rate. Speed should be slower than drilling and it also depends on the dia. of the reamer. I have noticed that lube plays a larger part in the finish you get. I've tried plain motor oil, "tap magic" (TM), motor oil and kerosene mixed. It also depends on the material that you are reaming.

Were I used to work we would leave about .010" to .015" (.25mm to .38mm) of stock on before reaming.

Bernd
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Offline Bluechip

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Re: My Attempt
« Reply #28 on: July 22, 2009, 01:44:50 PM »
Bernd

I use Rocol RTD on mine, it's a fairly well known stuff for tapping & cutting. Certainly makes a difference screwing stainless, ( usually EN58, your '303 I think, not sure ).

But were you using machine reamers ? I have a 1/4" with straight flutes, this seems to be OK. I get on OK with FCMS ( Free Cutting Mild Steel ), but with brass or especially ally I get score marks or chatter marks, even with the same reamer. The reamers are mostly Intal or Dormer, so they aren't Asian tools, nor are they worn, some are as new. I usually ream at about 300 rpm, feed, I guess, at about 1" per 2 secs.

I have been using a lathe since 1971, always had problems with brass & ally. I've just about given up. I can't ream. I need to live with it.

Dave BC
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Offline Bluechip

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Re: My Attempt
« Reply #29 on: July 22, 2009, 02:31:40 PM »


Hi troops

For those who like such things .. a movie ... and it now sports a flywheel  about 20 psi most of it is leaking from the blow-down gun   :scratch:




The brute in action ... kindly observe the strobe effect that my genius has contrived for your delight    ::)

Dave BC
« Last Edit: July 22, 2009, 02:35:40 PM by Bluechip »
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Offline rleete

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Re: My Attempt
« Reply #30 on: July 22, 2009, 02:31:48 PM »
"This image or video has been moved or deleted".  Can't see it.  Can you check the url and try again?

Nerver mind...
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Offline Stilldrillin

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Re: My Attempt
« Reply #31 on: July 22, 2009, 03:52:25 PM »
Works for me!  :thumbup:

Well done Dave.  :clap:

David D
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Still drilling holes... Sometimes, in the right place!

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Offline Bernd

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Re: My Attempt
« Reply #32 on: July 22, 2009, 06:37:25 PM »
Quote from: Bluechip on July 22, 2009, 01:44:50 PM
But were you using machine reamers ? I have a 1/4" with straight flutes, this seems to be OK.

I use straight flutes also.

Think we need a seperate post for this. Sounds like a few people are haveing trouble reaming. Maybe we can come up with an answer.

Bernd
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Offline Darren

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Re: My Attempt
« Reply #33 on: July 22, 2009, 06:42:48 PM »
I've used an adjustable machine one, little screw up front, used it quite a bit to make bronze bearings for record players quite successfully..
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Offline NickG

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Re: My Attempt
« Reply #34 on: July 23, 2009, 04:19:45 AM »
Nice vid, well done!  :thumbup:
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Offline Divided he ad

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Re: My Attempt
« Reply #35 on: July 23, 2009, 03:09:42 PM »
Sweet runner Dave  :thumbup:

Strobe effect fully appreciated  :ddb: 


Base next?  (I gotta ask, I just gotta!!  ::) )




Ralph.
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Offline Bluechip

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Re: My Attempt
« Reply #36 on: July 23, 2009, 05:34:02 PM »
Hi Folks

Many thanks for the kind words. It will get a base sometime I think.

Bit off it at the moment. Rheumatoid Arthritis in my right arm / hand.

Wretched paw looks like a blown up Marigold .. swollen knuckles etc.

Somewhat restricted, just have to wait until it sods off, as usual ..  :(

Dave BC
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Offline CrewCab

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Re: My Attempt
« Reply #37 on: July 24, 2009, 01:46:28 PM »
That runs nicely Dave  :thumbup:

CC
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