The Carbide Straightening Hammers have been a big help to a bunch of makers. Since they have been out, I have heard from many makers it has “saved the day” with their warped blades.
I did get a couple of requests from traditional knife makers that the hammer was too big for using it on a spring or some of their smaller knives. That started me down the path of what could be done to help these makers. I started off trying a regular punch and that seemed to work well but got some feedback that it was still a little hard to hit while trying to make sure it is in the right place. I have been using a spring punch like this for a long time to center punch where my tang holes go. Then it hit me to see if I could braze a carbide ball onto one of those. Well guys, that seems to work really well and have a had a few makers in the field tell me the same thing.
This spring punch has a Ø3/32″ ball brazed into one side of the punch and the other side is still a center punch you can use to mark patterns. This two tools in one, is extremely handy for straightening those hardened steel pieces that require more precision than wha the hammer can provide. Place the carbide end on the surface you want to impact, and pull back on the the end and let go. This spring pull allows you to hit with consistent force each time also. A video of me using it can be found here on Instagram.
In the picture above, you can see the size comparison of the small Ø3/32″ ball vs the hammer ø3/8″ ball. You will still need to do a similar method for straightening with the hammer by impacting on the inside curve of the piece to straighten in by expanding the metal on that side. The carbide is roughly 90 HRC so you can feel comfortable using it on very hard blades or springs.