Flashcards in Gearing Deck (22)
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1
Types of gearing
Speed reducers and open gearing
2
Define gearing
Transmits power between 2 or more parallel shafts by means of successively engaging gear teeth
3
Gear with more teeth (and larger) is the
Gear
4
Gear with less teeth (and smaller) is the
Pinion
5
Define gear ratio
Is the ratio of the larger gear to the smaller gear
6
Open gearing types
Spur gears, helical gears, bevel gears, worm gears, and rack and pinion gears
7
What is the most common gear
Spur gear
8
Spur gear purpose
Transmit power between 2 parallel shafts, no axial thrust loads, slower speeds, noisy, easy to assemble, and high strength
9
Helical gear purpose
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
10
Internal gear purpose
Generally a spur gear, allows for a compact design, and used in planetary gearboxes
11
Internal gears my be what type of element?
Geroller
12
Worm gear purpose
Good for shock loads, compact design, high ratios, 90 degree operation, durable, and poor efficiencies
13
Rack and Pinion gear purpose
Automation equipment and are not very common
14
Speed reducer/gearbox purpose
Used to reduce motor speed and increase torque, smaller package, less guards and bearings, Hp, speed , torque relationship, and hollow shaft C-face adapter
15
Types of speed reducers/gearboxes
Worm, helical, and bevel
16
Worm gear reducers purpose
Large gear reductions (100:1), perpendicular shafts (RT angle), not efficient, durable, compact, multiple gear reductions available
17
What does centerline distance mean?
The distance between the 2 shafts centers
18
Helical gear purpose
Very efficient (up to 99% for single reduction) and lower operation cost
19
Types of gearbox mounting
Base mount, shaft mount, and gearmotor mount
20
T of F use oil to lubricate gears
True
21
Lubrication concerns for gears
Leveling, concern for open gearing, seals, and ambient temps/operating temps
22
