Gearing

Question 1

Types of gearing

Answer 1

Speed reducers and open gearing

Question 2

Define gearing

Answer 2

Transmits power between 2 or more parallel shafts by means of successively engaging gear teeth

Question 3

Gear with more teeth (and larger) is the

Answer 3

Gear

Question 4

Gear with less teeth (and smaller) is the

Answer 4

Pinion

Question 5

Define gear ratio

Answer 5

Is the ratio of the larger gear to the smaller gear

Question 6

Open gearing types

Answer 6

Spur gears, helical gears, bevel gears, worm gears, and rack and pinion gears

Question 7

What is the most common gear

Answer 7

Spur gear

Question 8

Spur gear purpose

Answer 8

Transmit power between 2 parallel shafts, no axial thrust loads, slower speeds, noisy, easy to assemble, and high strength

Question 9

Helical gear purpose

Answer 9

Capable of carrying more load than a spur gear, quieter and smoother running than a spur gear, faster, higher cost, and can create thrust loads

Question 10

Internal gear purpose

Answer 10

Generally a spur gear, allows for a compact design, and used in planetary gearboxes

Question 11

Internal gears my be what type of element?

Answer 11

Geroller

Question 12

Worm gear purpose

Answer 12

Good for shock loads, compact design, high ratios, 90 degree operation, durable, and poor efficiencies

Question 13

Rack and Pinion gear purpose

Answer 13

Automation equipment and are not very common

Question 14

Speed reducer/gearbox purpose

Answer 14

Used to reduce motor speed and increase torque, smaller package, less guards and bearings, Hp, speed , torque relationship, and hollow shaft C-face adapter

Question 15

Types of speed reducers/gearboxes

Answer 15

Worm, helical, and bevel

Question 16

Worm gear reducers purpose

Answer 16

Large gear reductions (100:1), perpendicular shafts (RT angle), not efficient, durable, compact, multiple gear reductions available

Question 17

What does centerline distance mean?

Answer 17

The distance between the 2 shafts centers

Question 18

Helical gear purpose

Answer 18

Very efficient (up to 99% for single reduction) and lower operation cost

Question 19

Types of gearbox mounting

Answer 19

Base mount, shaft mount, and gearmotor mount

Question 20

T of F use oil to lubricate gears

Answer 20

True

Question 21

Lubrication concerns for gears

Answer 21

Leveling, concern for open gearing, seals, and ambient temps/operating temps

Question 22

What issues does elevation pose for gearing?

Answer 22

Safety and gearboxes heat up quicker at higher elevations