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Drill bits

Started by He Man, March 12, 2010, 02:56:36 PM

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Monsterlover

#45
March 15, 2010, 06:06:20 PM
Quote from: sno_duc on March 15, 2010, 03:48:24 PM

Monsterlover do you remember 'Tap Free' in the red and white tin cans, smelled like cinnamon. Has since be outlawed because it had trichloroethane in it, great stuff especially in SS.

I remember tap juice from tapmatic that came in a red and white can. Not sure it that had TCE or not.

Chlorinated paraphins and EP (extreme pressure) additives really help at the point of cut in yucky material like stainless and heat resistant super alloys.

But in the garage....

Anything helps. Motor oil, wd40, spit, anything :)

tapping is not the fine art people make it out to be. I've tapped plenty by hand with a cordless drill.

I've driven bigger taps (that I didn't have a big enough wrench for) with a socket and impact gun. :D

75% thread is asking for tap destruction. Go with 65% or even 60%

If your life depends on the thread not failing have a shop do it ;)

"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

ducpainter

#46
March 15, 2010, 06:08:55 PM
Quote from: Monsterlover on March 15, 2010, 06:06:20 PM
<snip>
If your life depends on the thread not failing have a shop do it ;)


What if you are the shop? ;D

I think you're making it harder than it is.

It really depends on the drilled hole.
"Once you accept that a child on the autistic spectrum experiences the world in
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    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
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Monsterlover

#47
March 15, 2010, 06:15:32 PM
It all starts there.

If you are the shop...

Better get it right.

;)

"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

Speeddog

#48
March 15, 2010, 07:19:13 PM
Standard rule of thumb on tap drills.

Fastener diameter - thread pitch = tap drill diameter

For example, M6x1.0:
6mm - 1mm = 5mm

1/4 - 20:
.250" - .050" = .200"
- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

GAAN

#49
March 15, 2010, 08:19:19 PM
or

hold the bolt up behind the bit

see threads only = good

see threads and shaft = bad

[thumbsup]

Monsterlover

#50
March 16, 2010, 02:52:40 AM
Quote from: Speeddog on March 15, 2010, 07:19:13 PM
Standard rule of thumb on tap drills.

Fastener diameter - thread pitch = tap drill diameter

For example, M6x1.0:
6mm - 1mm = 5mm

1/4 - 20:
.250" - .050" = .200"

this works great, used that method for years.

It stops working when you need to cut a 10-32 or 12-24 or 4-40 thread (or any of those wacky # threads)

I wish we'd just switch to the metric system ;D
"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

sno_duc

#51
March 16, 2010, 05:55:45 AM
Quote from: Monsterlover on March 16, 2010, 02:52:40 AM
It stops working when you need to cut a 10-32 or 12-24 or 4-40 thread (or any of those wacky # threads)

And it's amazing in a noisy machine shop, the 'tink' sound that a # tap makes as it turns into a multiple piece tap is heard by everyone in the whole shop. They all turn and  ;D at you  [bang]  [bang].
A conclusion is the place you got tired of thinking

Monsterlover

#52
March 16, 2010, 06:06:33 AM
I know.  :)  I also find it interesting that after some time in a shop when you hear a smash/crash sound nobody even moves.

When a machine wrecks everyone turns and looks.  They sound similar, but it's easy to tell when you need to duck and when it doesn't matter [laugh]
"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

teddy037.2

#53
March 16, 2010, 07:05:35 AM
Quote from: Monsterlover on March 16, 2010, 02:52:40 AM
this works great, used that method for years.

It stops working when you need to cut a 10-32 or 12-24 or 4-40 thread (or any of those wacky # threads)

I wish we'd just switch to the metric system ;D

don't hate on fine thd. they have a purpose in life, too  ;)

Quote from: sno_duc on March 16, 2010, 05:55:45 AM
And it's amazing in a noisy machine shop, the 'tink' sound that a # tap makes as it turns into a multiple piece tap is heard by everyone in the whole shop. They all turn and  ;D at you  [bang]  [bang].

Quote from: Monsterlover on March 16, 2010, 06:06:33 AM
I know.  :)  I also find it interesting that after some time in a shop when you hear a smash/crash sound nobody even moves.

When a machine wrecks everyone turns and looks.  They sound similar, but it's easy to tell when you need to duck and when it doesn't matter [laugh]

[laugh] [laugh] [laugh]

Speeddog

#54
March 16, 2010, 07:08:27 AM
Hey, if we could switch all of the 6-32's to 6-40's, that'd be a big improvement.
- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

Monsterlover

#55
March 16, 2010, 07:29:43 AM
those small threads aren't really *that* bad, but when you get really small, like 0-80, then the suckage starts.

Usually because some engineer drew up a print that wants that 0-80 thread next to a wall that's 2" high and they want the thread a half inch deep.

In inconel 718 or some other nastilloy material ;D

I'll get right on that [laugh]
"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

Popeye the Sailor

#56
March 16, 2010, 08:23:54 AM
Quote from: Monsterlover on March 16, 2010, 07:29:43 AM
those small threads aren't really *that* bad, but when you get really small, like 0-80, then the suckage starts.

Usually because some engineer drew up a print that wants that 0-80 thread next to a wall that's 2" high and they want the thread a half inch deep.

In inconel 718 or some other nastilloy material ;D

I'll get right on that [laugh]

;D
If the state had not cut funding for the mental institutions, this project could never have happened.

Monsterlover

#57
March 16, 2010, 09:16:36 AM
is that an admission of guilt?

;D
"The Vincent was like a bullet that went straight; the Ducati is like the magic bullet in Dallas that went sideways and hit JFK and the Governor of Texas at the same time."--HST    **"A man who works with his hands is a laborer.  A man who works with his hands and his brain is a craftsman.  A man who works with his hands, brains, and heart is an artist."  -Louis Nizer**

teddy037.2

#58
March 16, 2010, 09:19:50 AM
Quote from: Monsterlover on March 16, 2010, 07:29:43 AM
those small threads aren't really *that* bad, but when you get really small, like 0-80, then the suckage starts.

Usually because some engineer drew up a print that wants that 0-80 thread next to a wall that's 2" high and they want the thread a half inch deep.

In inconel 718 or some other nastilloy material ;D

I'll get right on that [laugh]

lol

smallest I've dealt with was a 3... in 304 cres  :-X

RED

#59
March 16, 2010, 09:27:02 AM
Where's Billy Mays when we need him the most? [roll]
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