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46
7. Find the endings for the given beginnings:
A B
1. The module is …
2. A pinion is …
3. Helical gears are
used …
4. Worm gears are
used …
5. The circular pitch
is …
6. The backlash
is…
A.
…the amount by which the width of a space
exceeds the thickness of the engaging tooth.
B.
…when the speed ratios of the two shafts are high
say, 3 or more.
C.
…the distance, measured on the pitch circle, from
a point on the tooth to a corresponding point on
an adjacent tooth.
D.
…to transmit motion between nonparallel shafts.
E.
…the smaller of two mating gears.
F.
…the ratio of the pitch diameter to the number of
teeth.
8. Say whether these statements true or false
1. Helical gears have teeth parallel to the axis or rotation.
2. Hypoid gears are similar to straight-tooth bevel gears.
3. The worm gear resembles a screw.
4. Dedendum is the radial distance between the top land and clearance.
5. The pitch circles of a pair of mating gears are not tangent to each other.
6. Spur gear is the most complex gear.
7. Bevel gears are used to transmit motion between nonintersecting shafts.
9. Make up sentences using the following words and phrases
1. Teeth, the, axis, rotation, spur, have, of, gears, parallel, to.
2. Are, similar, bevel, gears, hypoid, to, spiral, gears.
3. Used, motion, nonparallel, helical, are, to, between, gears, transmit,
shafts.
4. Between, land, circle, addendum, the, radial, is, top, pitch, distance, the,
and.
5. Is, larger, gear, pinion, than.
10. Choose the right variant: a, b, c.
1. Helical gears have …….. teeth.
a) .parallel
b). inclined
c). straight
2. Hypoid gears are similar to ….. ones.
a). worm
b). spur
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