1. Methods of mounting of jobs and cutting tools in machine tools The job or blank and the cutting tools essentially need to be properly mounted in the machine tool for achieving desired performance of the machining system. A)while mounting the job or blank in the machine tool 1. appropriate selection of work holding device or system from the available resources depending upon; configuration of the machine tool shape, size and weight of the blank kind of machining work to be done order of dimensional accuracy desired volume (number of same job) of production 2. correct location, strong support and rigid clamping of the blank against the cutting and other forces

2. Methods of mounting of jobs and cutting tools in machine tools 3. easy and quick loading and unloading to and from the machine tool or the holding device 4. proper alignment like coaxiality, concentricity etc. of rotating jobs 5. free flow of chips and cutting fluid B) while mounting the cutting tools 1. appropriate selection of tool holder and the method of mounting 2. proper positioning and orientation of the tool depending upon its type size and shape geometry proper alignment in respect of coaxiality, concentricity and machine tool configuration accurate and quick locating, strong support and rigid clamping minimisation of run out and deflection during cutting operation easy and quick mounting and change unobstructed chip flow and cutting fluid action

3. Mounting of Job in centre lathes Jobs requiring no support from the tailstock are usually mounted in 1. Chucks 3 – jaw self centering chuck 4 – jaw independent chuck 2. Face plate 3. Jigs and fixture

4. Mounting of Job in centre lathes 2. Face plate For turning, facing, boring, threading and similar operations, jobs of odd shape and size are usually mounted on large face plate (instead of chuck) being fitted on the spindle nose

5. Mounting of Job in centre lathes Jobs requiring support from the tailstock are usually mounted In-between the centres In-between the chuck and centre In-between headstock and tailstock with additional support of rest lathe dog driving plate

7. Mounting of Job in centre lathes Depending upon the situation or requirement, different types of centres are used at the tailstock end

8. Mounting of Job in centre lathes 2. In-between the chuck and centre: Heavy and reasonably long jobs which have large diameters and required heavy cuts are essentially held strongly and rigidly in the chuck at headstock with support from the tailstock through a revolving centre

9. Mounting of Job in centre lathes In-between headstock and tailstock with additional support of rest: To prevent deflection of the long slender jobs like feed rod, leadscrew etc. due to sagging and cutting forces during machining, some additional support are provided.

10. Mounting of tools in centre lathes Different types of tools which are used in centre lathes are usually mounted in the following ways. 1. HSS tools (Shank type) in the tool post. 2. HSS form tools and threading tools in tool post 3. Carbide and ceramic inserts in standard tool-holders 4. Drills and reamers, if required, in the tailstock 5. Boring tools in tool post

11. Mounting of tools in centre lathes 2. HSS form tools and threading tools in tool post form cutter mounted on the holder

12. Mounting of tools in centre lathes 3. Carbide and ceramic inserts in standard tool-holders

13. Mounting of tools in centre lathes 4. Drills and reamers, if required, in the tailstock

14. Mounting of tools in centre lathes 5. Boring tools in tool post

15. Mounting of Jobs and tools in Drilling machines Mounting of Jobs: 1.by directly clamp when job is heavy and/or of odd shape and size 2. in a vice which is clamped on the bed

16. Mounting of Jobs and tools in Drilling machines Mounting of Jobs

17. Mounting of Jobs and tools in Drilling machines Mounting of Jobs: 3. in a suitable jig clamped on the bed

18. Mounting of Jobs and tools in Drilling machines Mounting of tools: Small straight shank type solid HSS and carbide drill are held in a drill chuck which is fitted in the drill spindle at its taper bore.

19. Mounting of Jobs and tools in Drilling machines Mounting of tools: Drill socket