MilwaukeeJon

Relatively quiet...don’t know if the company can offer you a dB rating.

https://www.ventafume.com/

Motor does run hot but that apparently is normal. Air coming out of the pipe is merely warm. Brilliant design and surprisingly inexpensive.

Have had great luck controlling dragon’s breath/heat and dangerous fumes with a 37” Vent-A-Fume hood. Surprisingly powerful yet also quiet. Also works very well on my 3 burner Whisper Daddy forge.

That is good to know, Jspool, although I did try some of my really good Japanese and German knives for comparison and they did pretty well against the oak. The wood tested is really dense white oak and even a 1/4" piece is pretty tough. Clearly, my initial quench failed miserably and probably due to being too hot at the start. So last week I knocked off the really nicely shaped wooden scales and ornamental pins (yes, the knife was finished before I realized the bad blade!) and heat treated all over again. Much better results this time. Still learning about 1084 and also am going to start a new quench bucket given that the other oil had been in a year and may have impurities in it that don't help a successful quench.

One added bit of info. I did a 2nd tempering cycle, during which time I used a steel bar, two spacers and a C clamp to remove a small warp. In a rush to get back out to the shop I rapidly squirted the whole thing with cold water from the kitchen sink. My thought, perhaps mistaken, was that folks rapidly cool objects on which they are letting the colors run. Bad idea for me to quench right out of the 410 degree oven?

What else would be helpful to know? Normalized three times before quench (10-15 minutes, heated to orange color...can say that my gas forge seemed a tad hotter than normal). Also, I did not overheat blade during grinding/polishing.

Forged a larger kitchen knife from 1084 this weekend and thought all was well but after sharpening and honing it is clear the blade lacks integrity. Specifically, the edge crumbles pretty badly when chopping a 1/4" thick piece of white oak (using a hewing stroke as with an axe). Also, when I polish the blade with green compound on the buffing wheel (soft) the edge shows evidence of hair like pieces coming off. Not good! Looking back, it seemed as if the whole making process went well. however I did do a second heat treat because the quenched blade initially had a nasty warp (the straightening process involved reheating the blade to orange, bending/lightly hammering out the warp, reheating to critical and quenching again in 140m degree canola oil). It may be worth noting that the after the first quench the blade looked better, more like my other more successful blades (right color, large black flakes that came off during the quench). The second heat treat did not do the same. Any assistance on where you think this went wrong would be appreciated. No big deal messing up this knife and maybe I can use it for light duty work in the kitchen. But certainly am interested in not repeated whatever mistake I made. Thanks in advance for your advice.

I’ve seen that...beautiful old machine.

Thanks Glenn. Neat to see that old beauty in action.

Jason that is a neat machine. Sent you a PM.

Thanks. I did not know that.

Great idea. I need to keep messing around with drawings. The wall mounted spring could cause some bodily harm if the hook end let go and flew back at me! In theory, and again this is just playing around with the mechanical concept and not necessarily logical or practical at all, would a kind of “see-saw” logic work for a hammer of this sort....with a nearly central balance or pivot point and a rear spring between the extended (think twice the normal length) sledge handle and the floor? This of course makes use of the basic fulcrum idea, and would include a sledge on the end of the “effort arm” and a spring under the “resistance arm”: And would one gain more power by sliding the sledge handle into a longer metal pipe (or “arm”) to gain more leverage? This could lead to the creation of a totally ridiculous looking 10’ or 15’ long see-saw hammer! By the way, some lids on historical American and European desks (1790-1840 or so) use internal L shaped interior brackets with heavy balls on one end that act almost like a hidden sash weight, helping the lid open and close more gracefully.

Thanks much Frosty. Regarding studs, I do know what they are. I was talking specifically about adding an external reinforcing stud on the outside of the wall (in drawing) but probably not needed. Will play around with this design a bit and I appreciate your helpful input. As for the hinge for the handle an old-style blanket chest hinge with equal 8-10” long plates would possibly work nicely. And I think I can handle the screw hole dimensioning and not get too confused.......have been building furniture with traditional hand tools for a long time now. Just very new to smithing as well as any sort of metal fabricating and machine making.

Fantastic! I’m a bit confused by the wall/gate hinge mechanism. Is the wall stud vertical? If so is the spring attached high on this stud and then also partway up the handle to keep it elevated? Thanks in advance.