Posted by mechlook info on June 1st, 2012 11:46 AM | 6 Comments Direction of Operation of Controls for Machine Tools
Need for standardisation. A machine operator uses a machine tool through its controls. After the operator has worked on any machine tool for a sufficient length of time, he becomes so familiar with ...
Posted by mechlook info on June 1st, 2012 10:59 AM | 12 Comments Work to be turned in the lathe may be either held in the centres ; or fastened in a chuck, or clamped to the faceplate. The
work which is to be faced or turned true with a finished hole is held ...
Posted by mechlook info on June 1st, 2012 10:53 AM | 11 Comments Taper Turning on the Job
A job which decreases in diameter gradually, so that it assumes a conical shape, is said to be tapered.
Taper angle is the angle, included between the tapering sides of the job when extended to meet at ...
Posted by mechlook info on June 1st, 2012 10:51 AM | 10 Comments
(1) Morse Tapers. It is nearly 8/8 inch per foot and is mostly used on drill shanks.
The various Morse tapers are
Full taper angle
Morse Taper
0
2° 58' 54'
" "
1
2° 51' 26'
" "
2
2° 51' 41'
" "
3
2° 52' 32'
" "
4
2° 58' 31'
" "
5
3° 00' ...
Posted by mechlook info on June 1st, 2012 10:47 AM | 35 Comments This method is used for turning steep and short tapers. There is a circular base graduated in degrees which can be swivelled at any angle from the centre line of the lathe centres. (Refer Fig. 12.18)
While turning a taper, the ...
Posted by mechlook info on June 1st, 2012 10:43 AM | 39 Comments
This method is used for turning small tapers on long jobs and is confined to external tapers only. In this case tail stock may be set over by loosening the nut from its centre line equal to a value obtained ...
