Chain Drives

a chain vode of 60-4 indicates a ______ inch pitch chainthat is ______ strands wide.

.75, 4

Narrow chain is indicated by a _____ with in the pitch code.

1

The allowable mid-span moment of a virtical oriented chain drive is ____ to ____ percent.

2, 3

Dividing the mid-span movement by ____will give you the chain

2, sag

a silent chain drive system usually produces _____% less noise than a standared roller chain drive.

35

The allowable mid-span moment of a horizontally oriented chain drive is ____ to ____ percent.

4, 6

Rollerless chain is indicated by a ____ within the pitch code

5

What is the pitch of no. 60 roller chain?

6/8

Manually lubricated chains should be lubricated every ______ hours of operations.

8

A type_____ sprocket has no hum

A

Troubleshooting a chain drive sytem involves detemining the _______ cause of the fault and taking corrective action.

Actual

What is the attachment designation of a roller chain with 90 degree bent lugs on one side of the roller chain?

B1

What is the attachment designation of a roller chain with 90 degree bent lugs on both sides of the roller chain?

B2

A type ____ sprocket has a double hub

C

the oil flow of a type______ lubrication system should periodically be inspected o make sure that hte oil is flowing through the system properly

C

________action is caused by straight chain links moving about a circular sprocket.

Chordal

What is the main advantage of an inverted tooth drive?

Conforms well with the shape of the sprocket and noise reduction.

How do you check for defective or warped sprockets?

Dial indicator

Sprocket with less teeth will be ______than a sprocket with more teeth.

Faster

What are the advantages of malleable iron cast chain over steel chain?

Greater shock resistance and better for heavy duty.

Name the three types of drag conveyor chains.

H-Type, steel bar and combination

What is a type B sprocket?

Hub on one side

Name for types of chain lubricant systems?

Manual, drip, bath or disk, oil stream lubrications.

Describe chordal action in a chain drive.

Moves in straight lines around a circle.

What is the major disadvantage of a self lubricating chain?

Not very strong

What is the attachment designation of a roller chain with 180 degree bent lugs on one side of the roller chain?

S1

What is the attachment designation of a roller chain with 180 degree bent lugs on both sides of the roller chain?

S2

Silent chain is indicated by _______ wwhile high velocity, heavy-duty chani is indicated by _______.

SC, HV

Sprocket with more teeth will have_______ speed then a sprocket with less teeth

Slower

What are the two main types of engineered class steel chain?

Straight side bar and offset side bare.

Which popular compression bushing has no flange?

Taper lock

Why is a chain considered a positive drive?

There is no slip or creeping.

Why do type C (double Hub) sprockets have hubs on both sides?

To increase the contact area on the shaft

power is ______ from one shaft to another via a __________

Transferred. mechanical drive

This sprocket has no hub it is flat and requires another device to be mounted used for low speed and load

Type A (no hub)

_______________consistes of mannual and gravity drip lubication

Type A lubrication system

_________consists of the slinger disk and oil bath method.

Type B lubrication system

Why is chordal a problem in a chain drive?

Vibration caused by the rise and fall of the chain on the small sprocket. Detracts from chain performance and life limits power capacity and speed

When should standered chains be replaced by heavy -series chains?

When the standard chain is not durable enough for extreme conditions heavy shock loading .

Will heavy -series chain run on the same sprockets as standard chains?

Yes

the easiest drive system to install a chain on is one with _______ centers.

adjustable

The two methods commonly used to adjust chain centers are ______ centers and by using a _______.

adjustable center ,idler

Type D (detachablehub) sprockets have a _______ or ________

bolt on detachable, split hub

when replacing any component of a chain drive system, you should replace the sprocketsas well as the _______. This prevents you from mixing old components with new ones .

chain

A________ ________ is used to pull the loose ends of a chain together

chain puller

The taper design of a taper lock busing causes the bushing to _______ down onto the shaft.

clamp

Sprockets with a ________ hub is a type D hub

detachable

_______hubs are usually only found on larger sprockets.

double

A 20 in front of teh chain code indicates the chain is a _______-_______ chain

double pitch

the interlocking between chain and sprocket prevent the chain from _______when a load is applied to the sprocket.

flying of of the sprocket

Chain drives that are _______ lubricated should have their oil levels checked often enough to make sue that they never run dry

gravity drip

A silent chain must have a ________ to keep the chain from rotating off the sprockets

groove

The special link used to produce a strand of chain with an odd number of links is called a______ or a _______

half link/ offset link.

A special type of chain drive that has two or more strands of chain affixed side-by-side and is used on ______-duty machinery is called a_________-_________ chain.

heavy, muliple - strand

normal wear for a sprocket is considered exvessive when the teeth take on a _________ shape.

hooked

Another name for silent chain is _______ tooth chain

inverted

chains that are made up of a series of plates held together by pins are called ______ chains.

leaf Chain

the width of a multi-strand sprocket is indicated by a _________ in its secification.

letter

A multiple strand drive system can carry heavier loads due to its increased __________ _____________

load distibution

if chain tension is too ______ the chain will wobble off of the sprockets during operation

loss

To lubricat a chain by using an ol can or by rmoving the chain and dipping it into an oil bath is called the ________ mothod of lubrication

manual

A chain can be disconnected and reconnexted at one point through the use of a ________ ________.

master link

________strand chains are similar to standard chains but they have two or more widths.

multiple

The type of sprocket that is most often welded to a shaft is called a _______ sprocket.

no hub

Roller chain drives are very ______due to the rollers colliding with the sprocket Teeth

noisy

chain drives are lubricated by liquid lubricants called ______

oil

roller seat wear on a sprocket is indicative of an ________-designed chain drive

overloaded

The first two or three digits of the chain sizing code reveal teh ______ of the chain.

pitch

Shaft torque can be determined bu using a _____ brake and a _______

prony, scale

A chain that has too little sag can ______the efficiency of the drive system and can cause excess ______.

reduce, wear

What are two types of roller chain constructions?

riveted and Bradded

Multiplestrand chain drives are just like several standard _______chain drives side-byside

roller

_________chains are similar in construction to a roller chain except they no ______.

roller-less, rollers

_______ chains create less noise than standers chains because of their tooth shaped design

silent

the lubrication method that is required by a particular application depends primaily on the __________ and the __________of an application.

speed, load

The _______ alignment can be checked with a straight edge.

sprocket

In a chain drive _______ ratio cannot be determined by the pitch diameters of the sprockets. Sprocket ratio is the ratio of the number of teeth of the driven sprocket divided by that of the driver sprocket.

sprocket, driven, driver

two _________ and a _________ are the three basic components of a chain drive system.

sprockets, chain

Chain sag can be measured using a ______ edge and a _______.

straight, ruler

the _______ method of lubrication uses a pump to force lubricant onto the chain

stream

the bath method of lubrication is where a chain in an ecvlosed case is _______ into a bath of oil.

submerged

Shaft speed is measured using a _______.

tachometer

The speed and ______ of a driven sprocket can be determined from those same values of the driver sprocket and the sprocket ratio.

torque

The oil stream method is ________

type C lubrication system

on a horizontally oriented drive, it is very important for the sag to be on the _________ strand.

upper

Chain drive lubricants vary in their thickness which is called________.

viscosity