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  • Several Regions have held meetups already, but others are being planned or are evaluating the interest. The Calgary Area Meetup is set for Saturday July 12th at 10am. The signup thread is here! Arbutus has also explored interest in a Fraser Valley meetup but it seems members either missed his thread or had other plans. Let him know if you are interested in a meetup later in the year by posting here! Slowpoke is trying to pull together an Ottawa area meetup later this summer. No date has been selected yet, so let him know if you are interested here! We are not aware of any other meetups being planned this year. If you are interested in doing something in your area, let everyone know and make it happen! Meetups are a great way to make new machining friends and get hands on help in your area. Don’t be shy, sign up and come, or plan your own meetup!

Search results

  1. Chris Cramer

    Metal lathe options

    Your pictures give a good idea of how much of an angel is needed to cut the metal causing it to curl. I was thinking about the geometry of a sharp knife that would leave long straight strings with the blade following through the metal over one rotation.
  2. Chris Cramer

    Metal lathe options

    What you see in that video is what I had in mind. It is only showing the progress of the tool after it has pierced the metal. Like I said in the comment above about the only point at which the tool cuts towards the chuck is when it moves forward or progresses into the next layer of material...
  3. Chris Cramer

    Metal lathe options

    That is all familiar on my part from the study I've done on knife engineering. It makes sense that a metal turning tool would need to be rather obtuse instead of acute to resist shaping or bending by force against hard material. I'll take a picture of my tool when I can, and take a look at the...
  4. Chris Cramer

    Metal lathe options

    I don't have any more pictures yet, but to describe the way I grinded the tool. The shape is the same as the tool on the video I watched, but the edge was designed the same way as a knife. With a sharper bevel on the end of the steeper bevel leading up. Like the inserts, is the tool just...
  5. Chris Cramer

    Metal lathe options

    It is true that edge geometry makes more of a difference in cutting ability thn metallurgy, but when your cutting hard metals the tool needs to have higher hardness than the metal you are cutting. The edge retention of the tool steel will also effect how well it can hold an edge that is...
  6. Chris Cramer

    Metal lathe options

    I found the motor mount behind the control box. The two bolts that hold the motor were not tight and were sitting in the middle of the mount. I pulled the motor to the bottom of the mount and made sure the nuts were tight. It actually isn't necessary to remove the back plate that covers the...
  7. Chris Cramer

    Metal lathe options

    I ran into a problem with the machine itself now. The drive belt continues to bounce on the drive pulley. The teeth on the pulley are in good shape, but the belt feels and looks loose. Is there any way to tighten the drive belt or just the drive pulley, or do I need to replace the belt?
  8. Chris Cramer

    Metal lathe options

    The accusize HSS is M35 HSS. M35 is an older HSS with some cobalt added to it. M4 is a newer steel with more wear resistance and it's not all that hard to get as a foot of 1/4 1" flat bar which would be enough for four tools. I'm thinking of making some tools out of 1/4 M4 in its annealed state...
  9. Chris Cramer

    Metal lathe options

    I purchased 2 3/8 Accusize cobalt HSS blanks from Amazon the 3/8 x 6" blanks are only $16, and delivered the next day. I agree that HSS is much easier to work, but it is far less wear resistant than corbide. I don't know what type of HSS these blanks are made of or if they come fully hardened/...
  10. Chris Cramer

    Metal lathe options

    That makes good sense. The tip of the tool would need enough relief to pierce the side of the round stock if it doesn't start at the end the stock; and if the tool is put on an angle away from the chuck then the edge will cut into the side of the stock instead of the thin layer of the face that...
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