JOB SEQUENCE
STEP TURNING
AIM: The round nose tool is centered for facing operation.
TOOLS AND INSTRUMENTS REQUIRED: Round nose tool, parting tool, steel rule and outside caliper
SEQUENCE OF OPERATIONS:
1. The round nose tool is centered for facing operation
2. The given rod is fixed in the chuck such that, about 45 mm is projecting from the chuck.
3. The end is faced and checked for the centering of the tool.
4. The tool is set for turning and job is turned to 25 mm diameter in stages, to a length of slightly more than 40 mm and in stages.
5. Now the step f 18' 20 is turned in stages.
6. Using a parting tool, the shoulder of step is made sharp.
7. Keeping the total length of job slightly more than 40 mm, it is cut-off by using the parting tool.
8. Holding the job in the reversed position, facing of the other end is completed such that, the total length is exactly 40 mm.
RESULT: The step turned model is thus made, by following the sequence of operation as mentioned above.
