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Search results with tag "Fitting and machining theory"
PAST EXAM PAPER & MEMO N2 - Engineering N1-N6 Past …
previouspapers.co.zaFITTING AND MACHINING THEORY N2 FORMULA SHEET f = f T N t '1 S = 60 S = 'Q 40 N N 9 D - d length of workpiece Set-over = 2 length of taper length of workpiece Set-over = Ratio 2 ; tan = 2L Leading angle = 90 - (Helix angle + clea rance angle) Foll uu q u u q owing angle = 90 + (Helix angle - cleara nce angle) Lead = No. of starts pitch Pitch
FITTING AND MACHINING THEORY N2
www.vhembecollege.edu.za11.1 State FOUR advantages of the use of mandrels for the machinist. (4) 11.2 Name the TWO methods for setting over the tailstock in preparation for taper-turning on the centre lathe. (2) 11.3 A taper of included angle 6° (SIX DEGREES) has to be turned on a work-piece 280 mm long. Calculate the amount of tailstock set-over required. (3)