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Old 01-25-2016, 09:16 PM
Lew Hartswick Lew Hartswick is offline
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Default Machining gadget

Just finished up the third version of a gadget to help set lathe tools to center
line of spindle. Saw one either here or on HSM a while back that used a V to
align with a round stock in the chuck but it looked like one would need three
hands to use it so came up with this and after trying it out and then showing a
couple students after they tried to set the bit on center I think it'll be handy for
helping to teach the right set-up.
...lew...
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Old 01-25-2016, 09:36 PM
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Although you already have one, I just used a piece of aluminum covered with layout ink and set it on the carriage and a scribe in the chuck and scratched a line on the plate. I drilled a hole in it and it hangs on the wall behind the lathe so it is easy to find. It was the simplest method I found and always fool proof.
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Old 01-26-2016, 01:36 AM
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Looks nice, Lew. Should help eliminate the fiddlies.


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Old 01-26-2016, 08:15 AM
Lew Hartswick Lew Hartswick is offline
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Quote:
Originally Posted by milomilo View Post
Although you already have one, I just used a piece of aluminum covered with layout ink and set it on the carriage and a scribe in the chuck and scratched a line on the plate. I drilled a hole in it and it hangs on the wall behind the lathe so it is easy to find. It was the simplest method I found and always fool proof.
If you knew how hard it is get high school kids to even align the top edge of a tool bit to the center of the point of a center in the tail stock and the fact of 8 lathes with a bit different height centers to bed you'd realize that just wouldn't do it. :-)
...lew...
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Old 01-26-2016, 09:04 AM
Ed ke6bnl Ed ke6bnl is offline
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That a real nice one, other than you might have to remove the part that is in the lathe to set the tool. but nicest of that type I have seen
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Old 01-26-2016, 09:07 AM
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Lew, It is a beautiful piece of work in it's own right, and in a world where people rely on gadgets instead of brains, it will catch on fast.
If you could have them use their eyefones to find center the concept would be instantly used.
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Old 01-26-2016, 09:22 AM
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Quote:
Originally Posted by Ironman View Post
Lew, It is a beautiful piece of work in it's own right, and in a world where people rely on gadgets instead of brains, it will catch on fast. If you could have them use their eyefones to find center the concept would be instantly used.
Good idea on the IPhone. Download a level app and use the phone as the level. I use an level app occasionally.

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Old 01-26-2016, 11:49 AM
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Nice Work Lew. But the problem is not setting the tool height properly it is in the students understanding of why it is important.

To use it the student mounts it on the work then loosen the nut and adjust the stud until the level reads true Th e next student then mounts it on his work and adjusts the cutter until the level reads true
Student three repeats student ones method ......
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Old 01-26-2016, 01:34 PM
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I have always used a 6" machinists scale. Always have one in my shirt pocket and quick.
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Old 01-26-2016, 04:10 PM
Lew Hartswick Lew Hartswick is offline
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Quote:
Originally Posted by Ed ke6bnl View Post
That a real nice one, other than you might have to remove the part that is in the lathe to set the tool. but nicest of that type I have seen
NO! That is why the shaft sticks out the other side. Put it in a chuck in the tail stock. :-) I had that concern when the design was on paper. :-)
...lew...
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