7.3 Flashcards
what is the point angle on a phillips screwdriver
30°
what is the point angle of a reed and prince / frearson screwdriver
45°
what is the difference between pozidriv and phillips
pozidriv has more contact area which means more torque can be applied
what angle are most open end spanners at
15°
what are the 2 types of torque wrench
indicating and setting
what is the difference between indicating and setting torque wrenches
setting will indicate when the torque set is reached
what is a key feature of aviation snips
they do not remove any material
when using aviation snips what is the gap needed between the cut and the layout line
about 0.8mm or 1/32 inch to stop minor fractures
what is tooth pitch on a hacksaw
the number of teeth per inch
what direction is the cutting direction on a full hacksaw
the forward stroke
what direction is the cutting direction on a junior hacksaw
towards the operator
what is the angle of the cutting teeth on a single cut file
65-85°
what is the angle of the cutting teeth on a double cut file
40-50° then 70-80°
what are the 4 grades of cut for a file
bastard, second, smooth and rasp
what cut is finer second or bastard
second
what must be used instead of a chuck when using a tapered shank drill bit
a sleeve
what are the benefits of a split point drill bit over a standard twist
faster drilling, less force required, creates smaller chips and reduce the wandering
what does DTI stand for
a dial test indicator
