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Scissor Spring Question

cody6268 · 13 · 2139
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us Offline cody6268

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Scissor Spring Question
on: January 27, 2016, 06:12:50 PM
I have recently noticed on my most current 91mm SAKs--Super Tinker and Explorer (I mostly buy used 91mm due to the often low prices) that instead of the scissor spring being bent at a 90 degree angle in order to contact the scissor arm properly, the springs have a dent stamped into the metal instead.  Both of these were made ca. after 2012, as they both have brass rivets holding the two halves of the scissors together. 

When was this change done?
« Last Edit: January 27, 2016, 06:17:11 PM by cody6268 »
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us Offline jazzbass

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Re: Scissor Spring Question
Reply #1 on: January 27, 2016, 06:19:20 PM
In 1990 the spring design was changed so that the "free" end of the spring is cupped and rides in a groove in the pivoting side of the scissors. I assume this is the change you're referring to.

us Offline cody6268

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Re: Scissor Spring Question
Reply #2 on: January 27, 2016, 06:49:17 PM
Now I see what you mean, after looking at my Fieldmaster (purchased new in '06), it has it as well. I had been looking at the replacement scissor spring of my Craftsman, which was replaced last year. 

I guess all the replacement scissor/plier springs have this 90 degree bend?

Also, will a modern spring with the dent in the end work on an older one without this dent/groove combo?  I borrowed the spring from my Super Tinker to put on the scissors of a 1970s Craftsman model as a quick fix, as the springs I ordered at the same time as the knife still haven't shipped, even though the knife arrives today.
« Last Edit: January 27, 2016, 06:52:28 PM by cody6268 »
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us Offline parman53

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Re: Scissor Spring Question
Reply #3 on: January 29, 2016, 02:20:57 PM
I'm wondering the same thing. I have a Explorer from the 80's that needs a scissor spring. Does that mean I need a "old" style spring?
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ro Offline Corwyn

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Re: Scissor Spring Question
Reply #4 on: January 29, 2016, 02:32:14 PM
If I understood the question... yes...

No, the old springs are made of unobtainium.
Yes, the new springs will fit but not snuggly.. think of balancing a sphere on a cube... it will stay on, but it won't be as stable as either stacking two cubes or nesting the sphere in a cup.
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us Offline wyatth

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Re: Scissor Spring Question
Reply #5 on: January 29, 2016, 04:26:45 PM
Crap. My dad gave me a Climber that needs a spring and I didn't know there were differences. Unsure about the age, but the scissor pivot is not brass so seemingly pre-2012.

Any idea which is spring is right? Thanks.


us Offline SAK Guy

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Re: Scissor Spring Question
Reply #6 on: January 29, 2016, 04:52:32 PM
Is there a little dished groove on the scissor where the spring rides.
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us Offline cody6268

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Re: Scissor Spring Question
Reply #7 on: January 29, 2016, 11:55:09 PM
Got my springs in today and noticed something--the Craftsman (made 1977 according to here and Young's The Swiss Army Knife Owner's Manual, which specified the fine screwdriver came out in 1977)--has a scissor hole that is smaller in diameter than newer knives.   

All replacements are of the older type from my knowledge.  I have never received the modern type as a replacement part.
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us Offline jazzbass

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Re: Scissor Spring Question
Reply #8 on: January 30, 2016, 01:58:18 AM
Quote from: cody6268 on January 29, 2016, 11:55:09 PM
Got my springs in today and noticed something--the Craftsman (made 1977 according to here and Young's The Swiss Army Knife Owner's Manual, which specified the fine screwdriver came out in 1977)--has a scissor hole that is smaller in diameter than newer knives.   

The 1977 date for the fine screwdriver actually comes from Victorinox, and is most likely incorrect. There are far too many pre-1974 knives out there with it. That said, the spring hole size on the scissors did change around 1977 from the small 1.5mm hole to the current 1.9mm hole. Post a picture of your Craftsman with the tools out, tang stamp visible and I'll tell you when it was most likely made.

us Offline wyatth

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Re: Scissor Spring Question
Reply #9 on: January 30, 2016, 04:33:52 AM
Quote from: SAK Guy on January 29, 2016, 04:52:32 PM
Is there a little dished groove on the scissor where the spring rides.

I believe so, which means it's post 1990. But then it sounds like all replacement springs are the old type... Hmm





This is what I was about to buy, until I saw this thread:

http://www.amazon.com/gp/product/B0035MX7BY?psc=1&redirect=true&ref_=ox_sc_act_title_3&smid=A2M1W6RQC7V8KB
« Last Edit: January 30, 2016, 04:49:40 AM by wyatth »

us Offline sLaughterMed

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Re: Scissor Spring Question
Reply #10 on: January 30, 2016, 05:09:16 AM
Quote from: wyatth on January 30, 2016, 04:33:52 AM
Quote from: SAK Guy on January 29, 2016, 04:52:32 PM
Is there a little dished groove on the scissor where the spring rides.

I believe so, which means it's post 1990. But then it sounds like all replacement springs are the old type... Hmm


(Image removed from quote.)


This is what I was about to buy, until I saw this thread:

http://www.amazon.com/gp/product/B0035MX7BY?psc=1&redirect=true&ref_=ox_sc_act_title_3&smid=A2M1W6RQC7V8KB
Those are the right ones for your SAK. All replacement springs are the new style, with the cup to fit in the new style scissor's groove
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us Offline SAK Guy

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Re: Scissor Spring Question
Reply #11 on: January 30, 2016, 05:16:00 AM
In a spring repair kit, there is a 1.37 and a 1.37N. Those amazon ones look cupped like the new style.

added:  :salute: I'm too slow....
« Last Edit: January 30, 2016, 05:22:23 AM by SAK Guy »
- Robert




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"It's sad that governments are chiefed by the double tongues." - Ten Bears
Merit Badges Start a new thread and post a photo of a flashlight as part of your EDC Start a new thread demonstrating paracord knot tying Start a new thread showing photos of your outdoor cooking Start a new thread with a photo of custom or non standard SAK scales in your collection Start a new thread and post a picture of fire making kit or fire with a multitool Must put something in order and provide link to the post. Must start new thread with photos of multitools (Magazine/Catalogue type photos) Must buy something on EDCSource Participate in a challenge by carrying  a GEC knife and post a photo of it  for thirty (30) consecutive days. Start a new thread with photos of at least 8 different 130mm models in your collection Must start a thread with a photo of your birth year SAK Start a new thread with photos of your Mora knives in use Start a new thread with photos of your titanium gear with a multitool or sak Start a new thread with photos of at least 12 different 111mm models in your collection Start a new thread and post a photo of a traditional folder for thirty (30) consecutive days. Post your pocket dump photos then challenge two more members who must post their pocket dump photos within 24hrs for you to get the badge. Start a thread with photos of at least twelve different colored ALOX models in your collection Start a new thread with photos of your astronomy gear with a multitool

us Offline wyatth

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Re: Scissor Spring Question
Reply #12 on: January 30, 2016, 07:03:24 AM
Thanks, guys!   :cheers:

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