Myford Super 7 -59 metrification?

PekkaNF

I have the same problems over here in Hungary. Most of the stuff is metric except for the old Russian Army type equipment where the threads are UNC or UNF (SAE). The spanners they used are Metric A/F, -but not always. Sometimes the heads are the old Whitworth sizes. 

There is no need to be dyslexic in inch units. All you need is a number box (a calculator – well it is a box full of numbers)

Metric to inch – there are more metric numbers in a size than inch- (1” is 25.4mm). Multiply the inch size by 25.4 to get metric. To get inch from metric divide the metric by 25.4.

To convert threads per inch (TPI) to metric is a little trickier. Divide 1 (one) by the TPI and multiply by 25.4. To convert Metric pitch to inch TPI just divide the metric pitch by 25.4 and divide 1 by the answer.

Inch numbers like 23/64ths or 9/16ths just divide the top (23 or 9) by the bottom (64 or 16) and you have the inch sizes in decimals.

To do the business and cut metric threads on an inch lead screw (8TPI) you will need to get metric conversion set from Myford. This will depend on the type of change wheel set the lathe comes with.
If it is the manual change type check what is there in the lathe’s inventory as it may have them. It is also a good idea to check with Myford about the ‘Extras’ you need
If it is of the “Quick Change” type you will need these and a special ‘Banjo’ –change quadrant:-

Change wheel
 No Needed
 
63 T
 1
 
60T
 2
 
55T
 1
 
50 T
 2
 
45T
 2
 
40T
 1
 
35T
 1

Edited By David Clark 1 on 01/12/2010 13:17:22

Edited By Terryd on 01/12/2010 11:19:14

Edited By David Clark 1 on 12/07/2011 15:05:40