wp55b0dd48.png
wp4ed4d944.png
wp91074f43.jpg
wpa4923fff.jpg
wp0fe7637b.jpg
wp54b53ef2.jpg

Harold Hall

Metalworking

Workshop Set Ups

wp271d777d.png
wpe0a5a421.png

Dividing on the lathe, Setups  . Harold Hall

Dividing on the lathe
Dividing on the lathe
Dividing on the lathe, Dial engraving
Dividing on the lathe
Dividing on the lathe
Dividing on the lathe
Dividing on the lathe
Dividing on the lathe
fixture for dividing by four

During the time when the lathe was the only machine in the home workshop, dividing had to be carried out on  the lathe. Now, with many more workshops  having a milling machine the methods are less common.

 

Even so, there are still many workshops where there is only a lathe and even where a milling machine is available using the lathe can often  be worth considering.

 

Photo 1 shows the most adaptable method as any of the lathes changewheels  can be used making a wide range of divisions possible.  

 

Photo 2 depends on the lathe’s bull wheel having a useable number of teeth, for the Myford, typically, it has been 60 on the vast majority of their lathes. This being a good number as it enables most of the common low numbers to be achieved. Whilst it cannot provide the higher numbers it is far quicker to set up than that in photograph 1.  LINK

 

Photo 3 shows a very easy way of achieving 3 divisions and if the screw can be set at centre height minus half the jaw width 6 divisions can be obtained by also using it  below the jaws at the rear of the lathe.

 

When making my basic dividing head I made its centre height equal to the lathe’s. This made it easy to engrave dials with a scribing tool mounted on the top slide. However, Photo 4 shows it being used with my Lining Tool   LINK

 

Where divisions are required that are not available by other means, using a strip of paper round the chuck, suitably divided, is a possible approach, Photo 5. . LINK

 

The method was used in Photo 6 to provide 5 divisions for a drilling jig for a steam engine cylinder and is being marked using a Guided Centre Punch. LINK

 

Photo 7 shows a gear wheel being used to set the divisions for a dial, being similar to the method in photograph 4. The gear and dial are mounted on a two step taper stub mandrel. LINK

 

Photo 8 is a carrier for the collet seen being slit in Photo 9, the square section providing the four divisions required.  Photo 10 is another example  showing the setup more clearly. LINK  

 

A piece of hexagonal material could be used for 6 divisions.

wp5edc7c73.png

 1

wp5edc7c73.png

 2

wp5edc7c73.png

 3

wp5edc7c73.png

 4

wpe7285997.png

 5

wpe7285997.png

 6

wp5edc7c73.png

 8

wp5edc7c73.png

 9

wp5edc7c73.png

10

All pictures can be clicked on to provide a larger view

wpa1ea4390.png
wp09a2df2b_0f.jpg
wp5edc7c73.png

 7