Use the imperial chart and place the gears as shown to get 14tpi (assuming 14 is on the chart) You will most likely have to keep the half nuts engaged and run the spindle in reverse to back out teh carrage.

It would help if you said what the lathe is and also a photo of the chart would help us guide you

Edit looks like you were reading my mind, from your photos you need to use the set of table on the left and the lower one n/1" and arrange the gears shown under the 14 (tpi) If you are not sure how to arrange the gears ask again and I'll sketch it out and show how the various ratios give 14tpi off your metric 2mm pitch lead screw

Edited By JasonB on 30/09/2014 18:53:30

Edited By JasonB on 30/09/2014 19:05:42

OK you need to use the lower of the two charts headed TPI.

If you remove the cover from the end of the lathe you and look at it from the front you will see the edge of the various gears that run between the spindle and the end of the lead screw, these will be arranged to give a fine feed rate so you need to change them to give 14tpi.

Looking at the chart under 14tpi there are three rows of gear teeth numbers , the top row is 66, H this means you need a 66T gear and a spacer on the banjo side, the second row shows you need a 33T and 60T on that peg with the 60T towards the banjo and the last line shows you need a spacer and 80T gear next to the banjo.

So looking at the side of the new gear train it should look like this

As you change the gears you will have to loosen the various pegs and slide them along so the different gears mesh, put a strip of copy paper between the teeth and this will help set the right gap. You may well also need to pivot teh banjo forwards to do this and onve all the gears are set on the banjo pivot it back and mesh th etop 66T gear with the 40T of the spindle.

Hope that helps ask if not but it will have to wait until morning. I'll explain the maths then.

J

You can buy 7/8 x 14 studding which I have used quite happily to make reloading dies and swaging tools. As Bill says there is quiet a variation in swaging and reloading dies from different manufactures some tight in the thread and some really sloppy but matter snot if the lock nut is tightened.

Clive

Hi.. I suffer from a type of dyslexia which makes hard work of reading and understanding things not to mention writing emails and the like! Recently I've been struggling with understanding the gear ratios to get the right combination of stud gears on my metric gearbox and lead screw. I have researched various books and googled the subject. But by reading the example that JasonB has rendered up I'm please to say that the pennies dropped! Just by seeing this example has helped tremendously. It just goes to show how useful these forum are – thanks Jason for this contribution. It's help me greatly.

John