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How to straighten blade tip

ReamerPunch · 24 · 3506
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au Offline ReamerPunch

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How to straighten blade tip
on: May 03, 2016, 02:14:35 AM
Hi guys and gals.
I received my CyberTool 34 the other day, and it's in pretty good condition.
Gave it a good cleaning, and will probably buy new scales, because one has a crack. Not too serious, but why not upgrade.
The only thing now is to sort out the small blade.
The tip is a bit bent, and I'd like to straighten it out.

I'd gently beat it with a hammer, but just saying that sounds wrong.
So I thought I'd ask here before going about and damaging it.
Thanks!  :tu:
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Re: How to straighten blade tip
Reply #1 on: May 03, 2016, 02:20:55 AM
I've had very limited success getting them to straighten without breaking. Try it, if it breaks then re-profile or replace it. If it doesn't break, win.

au Offline ReamerPunch

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Re: How to straighten blade tip
Reply #2 on: May 03, 2016, 02:27:31 AM
Quote from: zoidberg on May 03, 2016, 02:20:55 AM
I've had very limited success getting them to straighten without breaking. Try it, if it breaks then re-profile or replace it. If it doesn't break, win.

I was afraid of that. I guess I'll leave it be. Unless there's a way around it. How about heating it up first?  :think:
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us Offline yud

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Re: How to straighten blade tip
Reply #3 on: May 03, 2016, 02:28:01 AM
Let me start with I have never done this so take this with a grain of salt.

I would try a vice before a hammer.  Either using the length of the vice jaws or put the tip in the jaws and start bending


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us Offline yud

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Re: How to straighten blade tip
Reply #4 on: May 03, 2016, 02:29:47 AM
Quote from: ReamerPunch on May 03, 2016, 02:27:31 AM
Quote from: zoidberg on May 03, 2016, 02:20:55 AM
I've had very limited success getting them to straighten without breaking. Try it, if it breaks then re-profile or replace it. If it doesn't break, win.

I was afraid of that. I guess I'll leave it be. Unless there's a way around it. How about heating it up first?  :think:

Heating it up will make the bend easier to take out, but will ruin the heat treat


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Re: How to straighten blade tip
Reply #5 on: May 03, 2016, 02:33:55 AM
Quote from: yud on May 03, 2016, 02:29:47 AM
Quote from: ReamerPunch on May 03, 2016, 02:27:31 AM
Quote from: zoidberg on May 03, 2016, 02:20:55 AM
I've had very limited success getting them to straighten without breaking. Try it, if it breaks then re-profile or replace it. If it doesn't break, win.

I was afraid of that. I guess I'll leave it be. Unless there's a way around it. How about heating it up first?  :think:

Heating it up will make the bend easier to take out, but will ruin the heat treat

You would re treat it.

Would probably work but it could also discolour it at the same time.
« Last Edit: May 03, 2016, 02:35:08 AM by zoidberg »

au Offline ReamerPunch

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Re: How to straighten blade tip
Reply #6 on: May 03, 2016, 02:34:48 AM
Quote from: yud on May 03, 2016, 02:29:47 AM
Quote from: ReamerPunch on May 03, 2016, 02:27:31 AM
Quote from: zoidberg on May 03, 2016, 02:20:55 AM
I've had very limited success getting them to straighten without breaking. Try it, if it breaks then re-profile or replace it. If it doesn't break, win.

I was afraid of that. I guess I'll leave it be. Unless there's a way around it. How about heating it up first?  :think:

Heating it up will make the bend easier to take out, but will ruin the heat treat

Ok then, looks like that's out the window too.  :think:
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Re: How to straighten blade tip
Reply #7 on: May 03, 2016, 02:36:03 AM
How bad is it, got a pic?

au Offline ReamerPunch

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Re: How to straighten blade tip
Reply #8 on: May 03, 2016, 02:41:46 AM
Quote from: zoidberg on May 03, 2016, 02:36:03 AM
How bad is it, got a pic?

Well, not too bad. Let me see if can snap a close-up.
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au Offline ReamerPunch

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Re: How to straighten blade tip
Reply #9 on: May 03, 2016, 02:45:28 AM
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au Offline ljnoble

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Re: How to straighten blade tip
Reply #10 on: May 03, 2016, 03:00:58 AM
Quote from: ReamerPunch on May 03, 2016, 02:45:28 AM
(Image removed from quote.)
I have straightend out ones in similar condition with a vice just very slowly and gently some of the time they come good sometimes they break and just have to re profile

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us Offline tattoosteve99

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How to straighten blade tip
Reply #11 on: May 03, 2016, 05:11:35 AM
Yes you can straighten it. I have bent and straightened many like this. Lay it on a flat piece of heavy steel. Then tap lightly with a ball peen hammer at the area of the bend. Take your time and go really slow.

Only hit it at the spine of the blade where it is thickest.
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us Offline Spork, Lord of Lime Jello!

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Re: How to straighten blade tip
Reply #12 on: May 03, 2016, 05:57:21 AM
I've broken a few using a vise. I prefer the hammer and anvil method as tattoosteve posted...aim for the spine. I will add that I use my riveting hammer which has a polished face...but a few marks are inevitable.

gb Offline Sparky415

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Re: How to straighten blade tip
Reply #13 on: May 03, 2016, 06:54:06 AM
You could try the hammer method and use a piece of wood as a drift against the blade, should not leave any hammer marks  ;)

Trouble is you need three hands to do this  :)
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us Offline Aloha

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Re: How to straighten blade tip
Reply #14 on: May 03, 2016, 06:54:47 AM
I've got nothing to add other than good luck. 
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mk Offline Deedee

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Re: How to straighten blade tip
Reply #15 on: May 03, 2016, 09:59:31 AM
That not looks too bad, i would leave it as it is.
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us Offline captain spaulding

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Re: How to straighten blade tip
Reply #16 on: May 03, 2016, 11:26:16 AM
I have bent one back similar. Do what Steve suggested.
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us Offline hobie

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Re: How to straighten blade tip
Reply #17 on: May 03, 2016, 02:40:27 PM
I suggest using a slot in a piece of hardwood as opposed to a vice for straightening.  Can work it down the blade that way and won't leave any scratches or marks.  Go easy, being careful not to snap the tip off.
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us Offline gene stoner

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Re: How to straighten blade tip
Reply #18 on: May 03, 2016, 04:01:17 PM
I've had some success using a flat counter and my thumb.  Lay the blade flat on the end of the counter put your thumb firmly on the tip and very slowly and gently lift the knife to bend back to straight. You usually still have a slight wave at the tip but for the most part it's straight.
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us Offline neillcurrie

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Re: How to straighten blade tip
Reply #19 on: May 03, 2016, 06:24:47 PM
I must have attempted straightening blade tips on SAK's maybe 20 times in the last 2 years as I get a lot of SAK's that have had tough owners in the past. Some tips will straighten my way, others won't, and I reprofile them then.
I firmly/carefully hold the knife wrapped in a rag fairly close to the end of the blade and press laterally pretty hard with the tip against something solidly mounted. In my case a Kitchen cabinet. Release the pressure, see if the tip has bent back any, and repeat till reasonably happy.
It's amazing sometimes how much force you can apply to the end without anything happening. Makes you realize how badly the poor knife tip was abused to cause the bend. I have had 2 tips snap off using this method, but I suspect no other technique would have been successful with these "last chance" repairs.

bavaria Offline Tomcat_81

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Re: How to straighten blade tip
Reply #20 on: May 03, 2016, 06:34:42 PM
Well well...
Do you have access to something anvil-like and a pretty small hammer?

My vocabulary is quite limited in that respect, the German Term would be "Richten". You gently strike the concave side of the blade ( all of the concave part, not only one area) with many gentle blows of the peen, thus creating many many small dents. The material displaced in that process will re-straighten the blade.
Usually you only apply that technique on new blades which got a curve during the hardening process, but I've tried it on several abused Vics, worked well.
Sometimes I needed to create visible dents, some sanding and polishing let that vanish quickly.

Good luck!
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us Offline SteveC

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Re: How to straighten blade tip
Reply #21 on: May 03, 2016, 11:09:42 PM
I've had some luck with a nylon tipped hammer and a hard flat surface.
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us Offline twiliter

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Re: How to straighten blade tip
Reply #22 on: May 03, 2016, 11:20:00 PM
Quote from: SteveC on May 03, 2016, 11:09:42 PM
I've had some luck with a nylon tipped hammer and a hard flat surface.

+1 On hardwood or soft metal for me, took a couple of bend-it-back fails until I learned my lesson.  :)
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Re: How to straighten blade tip
Reply #23 on: May 11, 2016, 11:55:21 PM
Quote from: neillcurrie on May 03, 2016, 06:24:47 PM
I must have attempted straightening blade tips on SAK's maybe 20 times in the last 2 years as I get a lot of SAK's that have had tough owners in the past. Some tips will straighten my way, others won't, and I reprofile them then.
I firmly/carefully hold the knife wrapped in a rag fairly close to the end of the blade and press laterally pretty hard with the tip against something solidly mounted. In my case a Kitchen cabinet. Release the pressure, see if the tip has bent back any, and repeat till reasonably happy.
It's amazing sometimes how much force you can apply to the end without anything happening. Makes you realize how badly the poor knife tip was abused to cause the bend. I have had 2 tips snap off using this method, but I suspect no other technique would have been successful with these "last chance" repairs.

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