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Millwright 2nd Year > Chains&Sprokets > Flashcards

Flashcards in Chains&Sprokets Deck (32):
0

Power transmission chains are used as what kind of drive to transmit power between widely spaced shafts

Positive drive

1

What are the two main designs of power transmission chains

Roller and silent chain

2

Are the two basic types of links on a roller chain

Pin links and roller links

3

Two types of connecting links

Cotter pin and spring clip

4

What kind of chain is better for shock load

Heavy-duty chain

5

What kind of chain is used in agriculture business and electro mechanical devices

Light duty chain

6

Multiple strand chain consists of how many Single strand chains assembled on common pins

Multiple strand chain consists of two or more Single strand chains

7

What kind of chains are designed for applications that do not permit regular lubrication

Pre-lubricated chain

8

What kind of steel is used in corrosion resistant chain

Stainless steel

9

What kind of applications are synthetic chains used for

Food handling and processing equipment
computer equipment
office machines
instrument drives

10

What kind of lubrication is required in synthetic chain

No lubrication is required

11

What are some advantages of silent chain

High-efficiency and high horsepower
High speed performance
Positive Drive

12

What are some ways of removing old chain

Chain breaker
torch or
grinder

13

What kind of plate is more convenient to install but reduces the working capacity of the chain by 30%

The slip fitted plate

14

What is the correct way to install a spring clip

The closed end must be installed in the direction of the rotation

15

Referring to chain tension too much tension can cause what to happen

Reduced chain and sprocket life
over load the bearings on the driver and the driven
inadequate lubrication in the pins and bushings

16

If you have too little tension what can happen

Chain whip and vibration
chain sagging
chain wrap up

17

What can be a cause of pin failure

Lack of lubrication

18

What is one way the chain can be elongated

Stretch due to overload

19

What are toothed wheels that are designed to mesh with power transmission chains

Sprockets

20

What is the minimum wrap angle that is recommended to carry a full load for which the chain is designated

120°

21

However at what angle can a chain be designated to carry a full load if proper chain tension occurs and is closely maintained

90°

22

Double pitch chain sprockets may have what required to fit between the link of a double pitched chain

Two times the number of teeth

23

Hunting tooth sprockets have what

Odd number of teeth

24

What kind of sprockets are common and intended for greater wear resistance

Hardened tooth sprockets

25

Hub style sprockets are classified as type.....

A, B, C or D

26

Does a type A sprocket come with or without a hub.

Without a hub
mounted onto any style hub with bolts

27

Type B sprocket is a one-piece sprocket and hub on one side how should you mount this on a shaft

You should have the sprocket mounted closest to the bearing and the hub away from the bearing

28

What allows a type C sprocket to provide more stability and add support to sprockets with large diameters

Hubs on both sides

29

Explain the type D sprocket design

It is a split design bolted together

30

What kind of hub provides the sprocket drive with overload protection in case of a jam

Shear pin hub

31

What is a common rule when replacing a shear pin on a shear pin hub

To change a shear pin with one that has the same shear value