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Blunder

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bitbuster

Active Member

Posts: 593

Joined: Tue Aug 17, 2010 8:03 pm

Location: NW Wis

Post Sat Sep 16, 2017 11:31 pm

Blunder

Was asked by neighbor to cut two keys for his shed door. Went to my old key rack and got one Star 5KW1 and one Curtis KW1, both NOS. Cut the Star with no problem. First cut on the Curtis went great but attempt at second cut was harder and then I saw a tiny spark. SOB. The Curtis blank was all steel. The 23RF cutting wheel had less than 75 keys cut on it. I took a fresh Ilco blank and cut 2nd key. The cutting wheel had not sustained permanent damage. The Curtis blank felt no heavier than the Star blank so I assumed it was brass with a coating. Lesson learned. I took the 3 remaining Curtis KW1 blanks and bent them before throwing them into my scrap bucket.

https://imgur.com/a/hAW3V
"I dream of a world where, chickens can cross the road without having their motives questioned."......Ralph Waldo Emerson
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Wizer

Familiar Face

Posts: 152

Joined: Tue Dec 08, 2009 7:48 pm

Location: Finland

Post Sun Sep 17, 2017 5:28 pm

Re: Blunder

Your forum name suits the post perfectly. :)
I can see how a surprise steel-blank could upset you, but I cut them daily.
A decent machine with a sharp HSS or carbide blade can cut hundreds of (for example) JMA steel blanks.
Check out "Fo-select" from Swizerland.
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Jaakko Fagerlund

Active Member

Posts: 281

Joined: Mon Jan 06, 2014 3:55 pm

Location: Finland

Post Sun Sep 17, 2017 5:47 pm

Re: Blunder

It's all about the cutting speed, that is how fast the cutter is rotating. If it is rotating in excess of 50 m/min, it will bur itself in steel in short time, while in brass it just wants more.
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mastersmith

User avatar

Contributor
Contributor

Posts: 516

Joined: Wed May 25, 2011 10:16 pm

Location: Miami Township, Ohio

Post Mon Sep 18, 2017 2:51 pm

Re: Blunder

Those Curtis steel blanks are crap anyway. That lousy coating they put on them is ugly and they will rust, after all they are steel! The coating keeps them from rusting while hanging on a hook waiting to be cut. They also DO NOT interact with brass / nickel silver lock pins. They will literally "saw" a groove in them. This I have seen many times.
"All ye who come this art to see / to handle anything must cautious be...." Benjamin Franklin
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bitbuster

Active Member

Posts: 593

Joined: Tue Aug 17, 2010 8:03 pm

Location: NW Wis

Post Mon Sep 18, 2017 4:22 pm

Re: Blunder

mastersmith wrote:Those Curtis steel blanks are crap anyway. That lousy coating they put on them is ugly and they will rust, after all they are steel! The coating keeps them from rusting while hanging on a hook waiting to be cut. They also DO NOT interact with brass / nickel silver lock pins. They will literally "saw" a groove in them. This I have seen many times.

I never gave it a thought when i took them off the old rack. Must have been the 1st time I ever used a NOS Curtis KW1 blank. I certainly would have remembered if I had attempted to cut one previously. Lesson learned.
"I dream of a world where, chickens can cross the road without having their motives questioned."......Ralph Waldo Emerson
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jeffmoss26

User avatar

Sargent Mossberg
Sargent Mossberg

Posts: 2013

Joined: Mon Apr 19, 2010 2:21 am

Location: Cleveland, OH

Post Mon Sep 18, 2017 11:10 pm

Re: Blunder

BTDT - with Schlage L blanks. Learned that mistake quickly!
macgng: i just thought the cat was a real tiny bear
GWiens2001: Great video! Learned a lot about what fun can be had with a forklift and a chainsaw.
pmaxey83: but i first have to submit the proper forms for a new hobby to my wife
xeo: i root for the kernel
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jharveee

Prolific Poster

Posts: 758

Joined: Thu Aug 22, 2013 3:14 pm

Location: San Marcos, Ca.

Post Tue Sep 19, 2017 12:49 am

Re: Blunder

we keep a magnet on the handle of our duplicator, so the key can be checked quick and easy. Sometimes we cut keys that people bring in and you never know.

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