Bent Back Spring (Swivel Bolster Switchblade)

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novice
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Bent Back Spring (Swivel Bolster Switchblade)

Postby novice » Fri Dec 01, 2017 4:01 pm

Bill:

I have a "J" marked Italian swivel bolster. It looks like someone pushed down too hard while cutting and bent the back spring so it won't lock when fired. The spring is complete and does not appear to be cracked just bent away from locking stud on the blade when open. Thinking about trying to repair it myself but a couple of questions:

Does the knife need to be torn down and spring removed to be bent back into correct position?

Does the spring need to be heat-treated afterwards?

Will much appreciate your reply.

sammy the blade
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Re: Bent Back Spring (Swivel Bolster Switchblade)

Postby sammy the blade » Fri Dec 01, 2017 5:16 pm

If someone was trying to cut with it they must have been desperate. I've never owned a sharp stiletto, not saying there aren't any but I've owned quite a few and none of them were sharp.
AKA Sammy da blade

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Re: Bent Back Spring (Swivel Bolster Switchblade)

Postby novice » Fri Dec 01, 2017 8:18 pm

sammy the blade wrote:If someone was trying to cut with it they must have been desperate. I've never owned a sharp stiletto, not saying there aren't any but I've owned quite a few and none of them were sharp.


Perhaps it belonged to Uri Geller previously?

/regardless, it's bent

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Bill DeShivs
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Re: Bent Back Spring (Swivel Bolster Switchblade)

Postby Bill DeShivs » Fri Dec 01, 2017 11:49 pm

If the bend is just behind the tab, you might be able to slip flat-nosed pliers over the tab and bend it back in place.
If the bend is further back on the spring, the knife will have to be disassembed.
Bill DeShivs, Master Cutler
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Factory authorized repairs for:
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Re: Bent Back Spring (Swivel Bolster Switchblade)

Postby novice » Sat Dec 02, 2017 12:36 am

Bill DeShivs wrote:If the bend is further back on the spring, the knife will have to be disassembed.


This unfortunately, bend starts about 1/3 back from bolsters about even with button.

So just bent back to shape and nothing else re: temper?

Thanks for the reply.

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Bill DeShivs
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Re: Bent Back Spring (Swivel Bolster Switchblade)

Postby Bill DeShivs » Sat Dec 02, 2017 12:53 am

It will be very difficult to repair that bend.
Bill DeShivs, Master Cutler
http://www.billdeshivs.com
Factory authorized repairs for:
Latama, Mauro Mario, LePre, Colonial, Kabar, Flylock, Schrade Cut Co., Presto, Press Button, Hubertus, Grafrath, Kuno Ritter knives.

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Re: Bent Back Spring (Swivel Bolster Switchblade)

Postby novice » Sat Dec 02, 2017 10:18 pm

Bill DeShivs wrote:It will be very difficult to repair that bend.


I figured as much. Puts me in the nothing to lose mangling & for science attempt.

Looking through my lost cause box discovered I have a Taiwan sex pin one with the same issue. I think I will try that one first.

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Re: Bent Back Spring (Swivel Bolster Switchblade)

Postby sammy the blade » Sun Dec 03, 2017 12:20 am

Good idea.
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Re: Bent Back Spring (Swivel Bolster Switchblade)

Postby john » Fri Dec 08, 2017 6:16 pm

Filed down the bottom bolster pin. The spring should move freely. Repair the bend; put a pin in the bottom bolster holding the spring in place. How’s it look? Does the blade fly open? Perfect! Peen the bottom pin.
If not perfect, try again.
Good luck!
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John

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