Surface quality: finished

M24 x 1.5

M = metric thread

24 = nominal diameter

1.5 = pitch

Ø 40 h7: 40

= nominal diameter

A4 x 0.3

A = recess at the diameter

h

= standard shaft

4 = width of the recess in mm

7

= quality

0.3 = depth of the recess below final size

Sequence of operations

Remarks

1. Setting the driving plate

Length of the pin of the driving plate max. 24 mm, because the Ø 52, Ø 42 and Ø 24 are made at one setting.

2. Selecting and clamping a firm centre

After having placed the centre, it has to be checked as to true running and, if necessary, to be corrected.

3. Placing the lathe carrier at disposal

Select the lathe carrier corresponding to the diameter of the reception.

4. Right curved side cutting turning tool (3 mm width)

Making available various shims for placing the tool at centre.

5. Thread groove parting-off tool

To be selected according to the data of the drawing.

6. Right-curved roughing lathe tool

Visual inspection of the cutting edges.

7. Setting the tailstock

Pay attention to correct clamping.

8. Selecting the live centre

Select the machine taper corresponding to the quill of the tailstock, check the true running of the centre.