shunsui
Gold Member
- Joined
- Aug 12, 2008
- Messages
- 5,665
Love my Spyderco Amalgam, but it shakes open rather easily.
I ordered a KYOCERA 1635-0625.094 Ball Nose End Mill to modify the detent hole.
The big river has it.
First of all BIG thanks to M0DiFiEDZ for his classic video on all this detent mod stuff.
Also BIG thanks to Nick Shabazz for his video on the Amalagam:
How to disassemble and maintain the Spyderco Amalgam Pocketknife
This is the stuff you need to do the job.
Hand force is all that's needed on the cutter. No need for a drill or dremel tool.
I used a plain tap & die set collet to hold the KYOCERA 1635-0625.094
You'll need a T8 torx driver. (I'd get a Wiha if I were you.)
The BelOMO Triplet 10x is an eye loupe to get a better look at your work.
The blue and white thing is just a carved up toothbrush handle I use for a pry bar.
I never even taped up the blade, but you might want to.
When you take the knife apart, you'll notice the detent hole is drilled all the way through the blade. This is handy because you can practice on the side that's not used for the detent and get a feel for the cutting tool.
Work slowly, cutting just a bit at a time, and reassemble the knife to test the detent as you go.
I tested the detent strength with a trigger pull gauge.
My original detent was between 7-11 oz. You could shake it open with one shake.
I did three grinds on the detent hole progressively increasing the detent strength:
15 oz
1 lb 7 oz
2 lb 4 oz
At 2 lbs 4 oz, the visible detent ball was about 80-90% in the hole. I didn't want to take it any further as I wanted the ball supporting the lock bar, rather than the bar flat on the blade.
Note that what I've done is enlarge the very top of the detent hole with a larger ball shaped cutting tool. The result is a bevel or cup at the top of the hole for the detent ball to nestle down in.
Keep in mind that everything here is rather small. Doesn't take much cutting to do the job.
I came close to overshooting where I wanted to be. Go slow.
This is the result
I ordered a KYOCERA 1635-0625.094 Ball Nose End Mill to modify the detent hole.
The big river has it.
First of all BIG thanks to M0DiFiEDZ for his classic video on all this detent mod stuff.
Also BIG thanks to Nick Shabazz for his video on the Amalagam:
How to disassemble and maintain the Spyderco Amalgam Pocketknife
This is the stuff you need to do the job.
Hand force is all that's needed on the cutter. No need for a drill or dremel tool.
I used a plain tap & die set collet to hold the KYOCERA 1635-0625.094
You'll need a T8 torx driver. (I'd get a Wiha if I were you.)
The BelOMO Triplet 10x is an eye loupe to get a better look at your work.
The blue and white thing is just a carved up toothbrush handle I use for a pry bar.
I never even taped up the blade, but you might want to.
When you take the knife apart, you'll notice the detent hole is drilled all the way through the blade. This is handy because you can practice on the side that's not used for the detent and get a feel for the cutting tool.
Work slowly, cutting just a bit at a time, and reassemble the knife to test the detent as you go.
I tested the detent strength with a trigger pull gauge.
My original detent was between 7-11 oz. You could shake it open with one shake.
I did three grinds on the detent hole progressively increasing the detent strength:
15 oz
1 lb 7 oz
2 lb 4 oz
At 2 lbs 4 oz, the visible detent ball was about 80-90% in the hole. I didn't want to take it any further as I wanted the ball supporting the lock bar, rather than the bar flat on the blade.
Note that what I've done is enlarge the very top of the detent hole with a larger ball shaped cutting tool. The result is a bevel or cup at the top of the hole for the detent ball to nestle down in.
Keep in mind that everything here is rather small. Doesn't take much cutting to do the job.
I came close to overshooting where I wanted to be. Go slow.
This is the result