Gearing Flashcards Preview

Module 4, Lesson 3 > Gearing > Flashcards

Flashcards in Gearing Deck (22):
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

What issues does elevation pose for gearing?

Safety and gearboxes heat up quicker at higher elevations