- Joined
- Nov 25, 2015
- Messages
- 8,300
Today was a bad day, I crashed my lathe twice. I haven't crashed it in years. And never a serious crash. I always look at your projects and figure out if there is a problem to warn you ahead of it. Well I didn't do it for myself.
I was making a washer for the surface grinder. I found a slug for my clausing mill that I had used to send my brake out for welding. I made the slug so they could get the weld correct after they V'd the break. It was cast iron, so I knew they would be preheating and need to have the slug to correctly size it.
The outer area was interrupted so I was going to trepan a disk out of it. The first crash was my 4 jaw had the jaws reversed so the longer end was stick out and during trepanning I had a small stick out.. While moving in, the jaws started hitting my cross slide ear. The SB has ears to lock the compound. The damage was not too severe.. more my ego, and bad enough... I'll explain later.
Ok back to work, I'm coming to the end of the trepan, almost through. I figured the part would just drop out. What I didn't think about (stupid) is the interrupted part would collapse and cause the crash. When it happened it appeared the chuck jumped up. Everything was locked up the chuck stopped.
I am now 10 thou off on the face of the 4 jaw, and 5 thou on the side.
I put my 3 jaw on and it's fine, so it's not the spindle. I think the chuck is trashed. 5 thou out on the side is not a problem because it's a 4 jaw. but the face being out is serious stuff. The 4 jaw is an integral 1.5 -8 .. it's an atlas chuck.. It has served me well, I use it quite a lot, since the 3 jaw doesn't have the reverse jaws, and is much less acurate as it's 80 years old, it's worn.
The aluminum inside the cast iron brake, this is the piece I was trying to use. The cut out was so they could V notch and do some nickel welding.
Taking a break from BREAKING THINGS.
I was making a washer for the surface grinder. I found a slug for my clausing mill that I had used to send my brake out for welding. I made the slug so they could get the weld correct after they V'd the break. It was cast iron, so I knew they would be preheating and need to have the slug to correctly size it.
The outer area was interrupted so I was going to trepan a disk out of it. The first crash was my 4 jaw had the jaws reversed so the longer end was stick out and during trepanning I had a small stick out.. While moving in, the jaws started hitting my cross slide ear. The SB has ears to lock the compound. The damage was not too severe.. more my ego, and bad enough... I'll explain later.
Ok back to work, I'm coming to the end of the trepan, almost through. I figured the part would just drop out. What I didn't think about (stupid) is the interrupted part would collapse and cause the crash. When it happened it appeared the chuck jumped up. Everything was locked up the chuck stopped.
I am now 10 thou off on the face of the 4 jaw, and 5 thou on the side.
I put my 3 jaw on and it's fine, so it's not the spindle. I think the chuck is trashed. 5 thou out on the side is not a problem because it's a 4 jaw. but the face being out is serious stuff. The 4 jaw is an integral 1.5 -8 .. it's an atlas chuck.. It has served me well, I use it quite a lot, since the 3 jaw doesn't have the reverse jaws, and is much less acurate as it's 80 years old, it's worn.
The aluminum inside the cast iron brake, this is the piece I was trying to use. The cut out was so they could V notch and do some nickel welding.
Taking a break from BREAKING THINGS.
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