Previously to do my scissors addition mods to pioneers I have been using pioneer solo backsprings for the donor spring and it was working out pretty good. They then discontinued those on me so I was left with no good way to do that mod. Then I got to thinking, I need to make up some springs on my own to solve the issue.
Well I've been awaiting this day for 4 months now, but they finally got done. I'm Canadian and I'd love to give a big thumbs up to all the US services I used to do the job. I bought 440c from admiral steel, had it laser cut at a friends shop, then off to heat treat at Peters. The quotes I got at these places were about 4x less than what I could have done locally.
Here is the original concept model I did. The idea was to make a spring that can be used for multiple tools simply by grinding the nub rest down. This should allow the spring to work for scissors, pliers, saws, really anything. I could even use 84 mm tools like the 84mm combo tool in the main blade layer by leaving enough metal to hold the combo up higher than the stock 93 springs would.
Anyways.. all the steps in this process did work out except the last. Succesful laser cut and heat treat, but the shop I tried to get them thickness ground couldn't do it. Instead of waiting longer I decided just to hand surface some and get the ball rolling on actually using these things.
The best tool I had to surface is the belt sander, so I had to make a aluminum heat sink and mount some pins to hold the part. The handy thing about these being springs is I could get them to tension against a pin placed just right and it was held quite nicely.
Grinding this way was slow, but successful. I had to stop alot to water cool and measure each end to make sure im grinding evenly along the whole surface. Slow and steady here was the key, but it did work out fine. These started at 0.155 and I took them down to 0.110 inches. Scissors are 0.100 so this leaves room for a 0.005 phosphor bronze washer on each size for super smooth action.
Here is a finished and polished part next to an unfinished one that was what I started with. This is how rough they look after the heat treat, but they sand and polish up beautiful. I've worked a lot with SAK springs and these look exactly the same side by side when both are polished so my custom ones will blend right in with the stock ones in the mod.
Here are some pics of the first mod I did using one, and how the scissor fits up in open mode.
And here it is closed. Notice the scissor handle rests just right on that ramp I made.
Here are a couple trying to show that it blends right in next to the stock blade spring.
Cheers and thanks for looking!
Well I've been awaiting this day for 4 months now, but they finally got done. I'm Canadian and I'd love to give a big thumbs up to all the US services I used to do the job. I bought 440c from admiral steel, had it laser cut at a friends shop, then off to heat treat at Peters. The quotes I got at these places were about 4x less than what I could have done locally.
Here is the original concept model I did. The idea was to make a spring that can be used for multiple tools simply by grinding the nub rest down. This should allow the spring to work for scissors, pliers, saws, really anything. I could even use 84 mm tools like the 84mm combo tool in the main blade layer by leaving enough metal to hold the combo up higher than the stock 93 springs would.
Anyways.. all the steps in this process did work out except the last. Succesful laser cut and heat treat, but the shop I tried to get them thickness ground couldn't do it. Instead of waiting longer I decided just to hand surface some and get the ball rolling on actually using these things.
The best tool I had to surface is the belt sander, so I had to make a aluminum heat sink and mount some pins to hold the part. The handy thing about these being springs is I could get them to tension against a pin placed just right and it was held quite nicely.
Grinding this way was slow, but successful. I had to stop alot to water cool and measure each end to make sure im grinding evenly along the whole surface. Slow and steady here was the key, but it did work out fine. These started at 0.155 and I took them down to 0.110 inches. Scissors are 0.100 so this leaves room for a 0.005 phosphor bronze washer on each size for super smooth action.
Here is a finished and polished part next to an unfinished one that was what I started with. This is how rough they look after the heat treat, but they sand and polish up beautiful. I've worked a lot with SAK springs and these look exactly the same side by side when both are polished so my custom ones will blend right in with the stock ones in the mod.
Here are some pics of the first mod I did using one, and how the scissor fits up in open mode.
And here it is closed. Notice the scissor handle rests just right on that ramp I made.
Here are a couple trying to show that it blends right in next to the stock blade spring.
Cheers and thanks for looking!
