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Somebody who knows how to use gears on Dalton 6 B-4, please help.

 

Hi guys! I've got the gear locations for screw-cutting figured out (stud is topmost, just in front of the two little gears, the comp is next lowest, and the screw is bottom-right, attached to the carriage lead screw.), but there's still one thing that has me stumped: What do you do if the thread you're cutting doesn't call for comp gears (which most threads don't)?? How do you get the stud gears to mesh with the screw gear?? As far as I can tell, they're completely out of react from one another.? Surely Dalton would have listed a pair of gears to put in the comp position if doing so was necessary, but I can't see how this is done with this spot empty. Am I missing something?
Thanks!
Glen Linscheid
 

I think you just move one or the other gear in or out using a smaller gear or a spacer so the line up. It's been at least 43 years since I used a lathe without a feedbox.
Glen

Here's a discussion on this; https://www.practicalmachinist.com/forum/threads/stud-gear.388949/
 

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It’s a long time since I cut a thread with change wheels - do the attached photos from a 1972 school textbook help?

Nick



On 2 Aug 2022, at 23:43, Glen Linscheid <partsproduction@...> wrote:

I think you just move one or the other gear in or out using a smaller gear or a spacer so the line up. It's been at least 43 years since I used a lathe without a feedbox.
Glen

Here's a discussion on this;

 

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There is a spacer on the end of the threading lead screw. This allows you to shift the gear on the lead screw one gear thickness. You move the spacer to the other side of the gear on the lead screw when compounding gears on the gear bracket are required when cutting some of the very fine threads. ??


On Aug 2, 2022, at 2:32 PM, Joseph Difusco via groups.io <josephdfco@...> wrote:

?Hi guys! I've got the gear locations for screw-cutting figured out (stud is topmost, just in front of the two little gears, the comp is next lowest, and the screw is bottom-right, attached to the carriage lead screw.), but there's still one thing that has me stumped: What do you do if the thread you're cutting doesn't call for comp gears (which most threads don't)?? How do you get the stud gears to mesh with the screw gear?? As far as I can tell, they're completely out of react from one another.? Surely Dalton would have listed a pair of gears to put in the comp position if doing so was necessary, but I can't see how this is done with this spot empty. Am I missing something?
Thanks!
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