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Type: Posts; User: eKretz

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  1. Replies
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    Good. I think that's the only way to go. The left...

    Good. I think that's the only way to go. The left hand thread is probably unnecessary since the spindle is keyed, but certainly won't hurt you any. I'm sure the Thompson spins the same as every other...
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    I think I would steer clear of the drilling and...

    I think I would steer clear of the drilling and tapping in place. If you don't bore the hole and single point thread it, you will never get it perfectly centered... that means runout. That means...
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    Yeah probably not going to be able to tap it, but...

    Yeah probably not going to be able to tap it, but you never know. The female thread and a socket head cap screw would work to hold the wheel hub on but you'd probably lose the ability to easily use...
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    Yes that is an odd duck. Looks like they took a...

    Yes that is an odd duck. Looks like they took a worm gear and just carved it up however they pleased to get around some obstacles or something.
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    Those flimsy ones do make it a challenge but I'm...

    Those flimsy ones do make it a challenge but I'm sure you can get it dialed in pretty well. I think you probably should use a different wheel balancer though. I think I would steer clear of anything...
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    Glad that it worked out for you... This time....

    Glad that it worked out for you... This time. Next time use some filler, for the love of God! :D
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    Yeah the finish on the video looks like you're...

    Yeah the finish on the video looks like you're getting there. With such a machine the wheel balancing will probably help a lot. Like a lot a lot. I haven't bothered to balance the wheels on my...
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    Yikes. That's either a new spindle or a serious...

    Yikes. That's either a new spindle or a serious spindle-out repair. I would bet that it's not case hardened. You can probably repair it even if it's fully hardened if you use all carbide tooling,...
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    Yep. 309 works fine for 4140 - we used to use it...

    Yep. 309 works fine for 4140 - we used to use it all the time in the shop where I did my apprenticeship. That's not to say 310 or higher might not work better. It is the ferrite content in the filler...
  10. We could still do a lot with a little today, but...

    We could still do a lot with a little today, but for the fact that nobody wants to pay for it. It's not an efficient way of working. I am sure many of us still do similar things when we're working on...
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    Yeah but you're using filler, he didn't. Fusion...

    Yeah but you're using filler, he didn't. Fusion weld is bad juju on even medium carbon steel with TIG. Especially with the concave fillet.

    309 is a good filler for dissimilar steels too.
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    I mentioned that on the other site he posted at....

    I mentioned that on the other site he posted at. He might get away with it for a quick one time use.
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    Lower speed is pretty essential for something...

    Lower speed is pretty essential for something like buffing a car or you absolutely will just sling off most of the compound. I have a Makita variable speed buffer made for automotive work and it has...
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    Donie, go back to your corner, for crying out...

    Donie, go back to your corner, for crying out loud. People can take a little criticism, it doesn't hurt anyone without a fragile ego, and can be extremely HELPFUL to those who actually use it in a...
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    Yep. 10 characters, etc.

    Yep. 10 characters, etc.
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    Well something like a Blanchard type grinder with...

    Well something like a Blanchard type grinder with the spindle oriented vertically would have the up/down correctly labeled as 'Z' axis. Otherwise I have never seen a horizontal spindle reciprocating...
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    I think it came about because originally before...

    I think it came about because originally before CNC only one axis could really rotate in a way that could accomplish any cutting or drilling. So it made sense to have the axes follow the machine...
  18. Nah, you're doing good. Those occasional good...

    Nah, you're doing good. Those occasional good deals get you a lot of good will!
  19. Daaaamn, 2 minutes flat! :D

    Daaaamn, 2 minutes flat! :D
  20. Thread: steel finishing

    by eKretz
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    Does the part need to be dead flat or just shiny?...

    Does the part need to be dead flat or just shiny? If very flat, get a lapping plate and use it after milling. If it just needs to be shiny and local flatness isn't super critical, use a buffing wheel.
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    Good luck! I have remote pods on the lathe, mill...

    Good luck! I have remote pods on the lathe, mill and grinder with Fwd/Rev, Jog and Start/Stop along with a speed pot. Don't use them on the surface grinder or toolpost grinder though, I just use the...
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    Yes running the 7.5 HP motor with a 7.5 HP VFD...

    Yes running the 7.5 HP motor with a 7.5 HP VFD from single phase is not good for it. I'm sort of surprised it doesn't fault out on acceleration. I only have a 5 HP motor on my lathe and I also run my...
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    Found an old photo of a decent sized fabrication...

    Found an old photo of a decent sized fabrication set up on one of the larger machines. This is a 7" spindle G&L HBM for size reference. This fab was in from the steel mill for reconditioning. It had...
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    Looks like for the 240 version of a 5.5kw...

    Looks like for the 240 version of a 5.5kw Hitachi, at a maximum of 10% duty cycle the maximum braking torque setting is 80% and for that, minimum resistance is 20 ohms. For 100% duty cycle, max...
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    I had a similar problem finding the minimum...

    I had a similar problem finding the minimum resistance specs on my Hitachi VFD for the braking resistor. I finally found the spec buried in fine print somewhere in a pdf. I think they just want you...
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