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  1. J

    Is 40 Rc WAY too low for a slip joint spring?

    Yeah, I remember that. Heat treating is such a funny thing. On one hand, with all of the variables involved, it almost seems unimaginable that anyone can do anything related to heat treating consistently. Nevertheless, people do it all the time with excellent results. I hope to post a...
  2. J

    Is 40 Rc WAY too low for a slip joint spring?

    I repeated HT with temp. and soak increased as noted above. Now both blade and spring are reading in the 61.x Rc range. Both are tempering now, so hopefully I'll know something by this afternoon.
  3. J

    Is 40 Rc WAY too low for a slip joint spring?

    Hey Johnny, Thanks for the feedback. The blade checks out at 55-56 Rc, so I think I need to repeat this little exercise. I'm going to increase my temperature to 1925°F and increase soak time to 30 minutes and decrease the tempering temperature on the spring. Thanks, JC
  4. J

    Is 40 Rc WAY too low for a slip joint spring?

    Thanks for the response Chuck. I guess I don't have to worry about it breaking since it is too soft. I'll assemble it today and see how it behaves. I think I'll adjust my heat treat and tempering profiles moving forward.
  5. J

    Is 40 Rc WAY too low for a slip joint spring?

    The title pretty much sums it up. I posted a question in the heat treat forum here looking for guidance on heat treating and tempering CPM154 for a slip joint blade and spring. Perhaps I didn't use a long enough soak during HT, but after tempering at 1200F for one hour, it reads 40 Rc. This...
  6. J

    Tempering CPM154 for Slip Joint Spring

    Okay, here are the initial results. Fast ramp to 1450°F, hold for 10 minutes. Fast ramp to 1900°F, hold for 20 minutes. Plate quench between two 1" copper plates in an arbor press while blowing shop air between plates. Depending on location, the spring measured 58 to 60.2 Rc and the blade...
  7. J

    Tempering CPM154 for Slip Joint Spring

    Cool. I'll try that profile on Monday then. Thanks.
  8. J

    Tempering CPM154 for Slip Joint Spring

    Thanks for the responses guys. Hey Rusty, Do you heat treat per those guidelines as well? I'm wondering what the differences would be between that profile and the one Tracy has posted (1900ºF for 15 mins vs. fast ramp to 1450ºF, hold for 10 mins then fast ramp to 1850ºF for 30 mins). If...
  9. J

    Tempering CPM154 for Slip Joint Spring

    Does anyone have tempering data for ~0.100 thick CPM154 for use as a slip joint spring? I got heat treat data and blade tempering info from Tracy's site. Now I just need spring temper info. Thanks, JC
  10. J

    PKA Show In Denver

    I should have known better than to hope the slip joint was still available. That is definitely a beautiful hunter, but I'll keep waiting on you to work down to my spot on the list:)
  11. J

    PKA Show In Denver

    A question and a comment. What was left over and is it up for grabs? Out of all the excellent work on his table, notice which piece Bruce picked up for this photo! Congratulations on what looks to have been a very nice show.
  12. J

    Brand new book on building slipjoints

    I haven't finished reading the book yet, but I'm almost done. There might be mention of additional methods, so I'll only comment on the portion I've read, which is up to about page 89. Don does use a mill; however, I do not interpret his methods to absolutely require using a mill. For...
  13. J

    Slip Joint Patterns

    I just wanted to express a huge "thank you" to everyone that has responded to this request, either here or via email. Overall, the generosity and willingness to share techniques/tips is something that sets the knifemaking community apart from any other that I know of. That level of generosity...
  14. J

    Slip Joint Patterns

    Honestly, it was Bruce Bump's mini feather slip joint that sparked my interest, but his wharncliff WIP really pushed me over the edge. I really love this pattern, but am not at all surprised that it isn't all that popular among others.
  15. J

    Ken Coats Swayback

    Thanks guys. Yeah, I'm thinking about something similar as one of my future slip joint projects. As a matter of fact, I just picked up some of Delbert Ealy's Damascus. It won't be the next one though as I've already got something else planned.
  16. J

    Brand new book on building slipjoints

    I got mine today as well. Only about 20 pages in, but very nicely done so far. I especially appreciate the templates provided. Those will definitely be useful. Thanks Don. JC
  17. J

    Ken Coats Swayback

    Thanks to Bruce Bump's awesome WIPs, I've decided to try my hand at making slip joints. I have my first in process, though it has been a little slow going. I decided that in order to assess the level of fit and finish makers are putting out, I would need to buy a nice slip joint from a custom...
  18. J

    Brand new book on building slipjoints

    Just placed my order. Any estimate of when these will be ready to ship?
  19. J

    A little knife for a friend

    Simply spectacular!
  20. J

    First slip joint WIP

    Sorry for muddying the waters so-to-speak with regards to using bushings. My intent was to discuss how using bushings might help avoid the tightness you are experiencing. I see now that I inadvertently implied that you are using one, which I knew wasn't the case. Again, sorry for the...
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