Good video covering four jaw basics of alignment of irregular parts. I’ve been machining for over half my life but it’s always nice to watch the basics to keep myself tuned and amused.
I have literally zero time on a lathe, but I just got my first one. Prior to watching this, I would’ve gone about this quite a bit differently and I’m curious if it would’ve worked out, or if it would’ve been a disaster, or somewhere in between and dependent on how lucky I am… If anyone knows I’d welcome some input… I would’ve gone about it like this: - Use right angle to scribe 2 or more lines across the face of the stock to find the center and mark it with a punch. - Use calipers or dividers to scribe a circle with a 3/8” radius. - Pick a random spot on that circle and punch mark it. This is the center for the part. - Then I’d use the tailstock with a center in it pushed up to my part in the four jaw. Adjust four jaw until the center touches on the spot punched on that 3/8” radius circle. Am I way off base here?
Good video covering four jaw basics of alignment of irregular parts. I’ve been machining for over half my life but it’s always nice to watch the basics to keep myself tuned and amused.
Well done that man. Great job and good video coverage. Thank you.
So you used a 4jaw at one end and an offset hole for the center at the other? I missed all the details of that. Thanks
I have literally zero time on a lathe, but I just got my first one. Prior to watching this, I would’ve gone about this quite a bit differently and I’m curious if it would’ve worked out, or if it would’ve been a disaster, or somewhere in between and dependent on how lucky I am… If anyone knows I’d welcome some input…
I would’ve gone about it like this:
- Use right angle to scribe 2 or more lines across the face of the stock to find the center and mark it with a punch.
- Use calipers or dividers to scribe a circle with a 3/8” radius.
- Pick a random spot on that circle and punch mark it. This is the center for the part.
- Then I’d use the tailstock with a center in it pushed up to my part in the four jaw. Adjust four jaw until the center touches on the spot punched on that 3/8” radius circle.
Am I way off base here?
More than one way to skin a cat but if that cat was a crankshaft.......
This method is repeatable and can be very accurate like a crankshaft should be. No scribe or punch is going to get that.
If throw is .250..500 on clock.other 2 jaws equal equal
Thats a really bad spot for the camera