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Feeds per inch on a Logan 400

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Logan 400

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#1
The change gear chart shows the slowest speed is .0046. After studying the ratios I changed a couple of gears and I have it down to about .0028. It still seems too fast for steel. Should I study my tooling or do I need to slow it down some more? Thanks for any input.
Jay
 

stupoty

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#2
I think my lathe goes down to 0.0025 per rev, gives nice finish, I tend to rough faster, up to about 0.018 per rev. depends on how rigid the set up is and depth of cut etc.

Stu
 

Nogoingback

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#3
I would just give it a try with the steel you normally use and see what you get.
 

Logan 400

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#4
I tried it on aluminum and steel. Aluminum was fair but too fast for steel. I ordered another gear so I'll give that a try when it arrives next week.
 

MarkM

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#5
.0046" is slow enough for a decent finish cut. Do you have a radius on your tool. Check if your tool is on centre accurately. Take a face cut and make sure it s not leaving a pip or pushing the pip off.
 

Logan 400

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#6
I believe I am dead on center but will try a face cut to verify. I tried several tools but I did not try sharpening them. I only tried it out for a few minutes. I have been feeding everything by hand and just started setting up the carriage feed.
 
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