I've made a similar tool myself. But I used a 300 mm long coupler nut(for threaded rod) to do the pulling. That way, the load is spread out on more threads, and it will take the stress easily. Nice video, thanks!
Actually, I made an entire new one this time the same 7mm size as the major diameter itself. Threaded M7-1.0 and I did use a scrap of hex bar which was hardened, I had to temper it with a torch to machine it, drill and tap that and made a longer nut. I didn't reharden it because it was moot; the bar itself isn't like 4140 steel or anything like that. I used it off-camera on one other guide and even that one was starting to stretch the threads. So yea, a 2 thou crush is a lot of force but the concept was good in my opinion. If I ever get a new lathe with single-point threading capability in metric, I can make these tools in either tool steel or 4140 higher carbon steel and harden them. But alas, the Neway valve seat cutter set, which I've wanted for awhile now, set me back over $1,400 bucks so no lathe for me.
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I've made a similar tool myself. But I used a 300 mm long coupler nut(for threaded rod) to do the pulling. That way, the load is spread out on more threads, and it will take the stress easily. Nice video, thanks!
Looking forward to the next one
Great video, top notch machining work on the tools.
Enjoyed the video Tom. RIDE SAFE OUT THERE
I like yur square up tool for the valve install height gd idea
good job
Perhaps making a long hex nut will stop the draw nut seizing
Actually, I made an entire new one this time the same 7mm size as the major diameter itself. Threaded M7-1.0 and I did use a scrap of hex bar which was hardened, I had to temper it with a torch to machine it, drill and tap that and made a longer nut. I didn't reharden it because it was moot; the bar itself isn't like 4140 steel or anything like that. I used it off-camera on one other guide and even that one was starting to stretch the threads. So yea, a 2 thou crush is a lot of force but the concept was good in my opinion. If I ever get a new lathe with single-point threading capability in metric, I can make these tools in either tool steel or 4140 higher carbon steel and harden them. But alas, the Neway valve seat cutter set, which I've wanted for awhile now, set me back over $1,400 bucks so no lathe for me.