Chain Drives and Lubrication

A chain code of 50-4 indicates a chain that is __________ inch pitch chain.

0.625

Good chain maintenance procedures require that the oil in a chain drive system be changed every ________________.

2500 hours of operation

A viscometer is a device used for measuring viscosity of an oil and is generally __________ accurate.

95-99

The last few digits of a chain sprocket specification code indicate the ________________.

Number of teeth

In the United States, oil viscosity is measured in __________.

Saybolt Universal Seconds

To determine the type of lubrication system required for a chain drive system, you need to know the sprocket size and _______________.

Sprocket RPM

Multiple strand chain is constructed of two or more widths of _______________.

Standard roller chain

Lubricants provide six general applications for machines, which of the following is not a general function? reduce friction load dissipate heat reduce component wear allows system to be contaminated due to material in lubrication

allows system to be contaminated due to material in lubrication

The pitch of the sprocket can be measured by using a machinist's rule. This number must be translated to ______________.

chain pitch code

The three qualities used when specifying a grease are: type of soap, hardness, and _________.

dropping point

One of the simplest but slowest methods of recycling oil is __________.

gravity separation

Silent chain sprockets require a(n) _____________ to keep the chain from rotating off the sprockets.

groove

The manual method of lubrication is used ________________.

in slow speed applications where equipment can easily be shut down

Silent chain connecting links are installed by interlocking the two end links together then, ______________.

intersecting the two rocker joints

The reason that grease is not recycled like oil is because _______________.

it is not cost efficient it is very difficult to remove the impurities

Chain pitch is important because it specifies both chain size and ______________.

length

The most often used grease is __________ because it provides excellent lubrication under moderate loads and also at high temperatures and speeds.

lithium

The Safety Data Sheet (SDS) must be filled out and __________.

made available for anyone who will use the material

The four methods used to apply lubrication to a chain drive system are __________, drip cup, bath or disc, and forced stream.

manual

Grease is made by adding a thickener such as ______________ to a liquid lubricant.

metallic soap

When loading a grease gun it is better to use a grease cartridge because ___________.

of the possibility of dirt in the barrel of grease

There are seven basic types of oil in use today, one of these is refrigeration oils which has a function to ____________. operate in both high and low temperatures be tackily enough to cling to high speed components without being slung off have a viscosity low enough to be atomized form a film thick enough to dampen shock

operate in both high and low temperatures

After use, used oil should be __________.

recycled or collected by an EPA approved service

Mineral oil is derived from __________.

refining crude oil

A chain breaker is a tool strictly designed for __________.

removing a link from the chain

A probable cause of wear on sides of chain or on sides of sprocket teeth in a chain drive system would be _______________.

shafts not parallel or sprockets not in the same plane

When selecting components for a chain drive, the size of the larger sprocket can be determined by using the __________.

speed ratio

When storing lubricants store them in a fire prevention area using all but one of the following. Which of the following should you never do? store lubricants with other flammable materials prohibit smoking in or around the area have water hoses available use explosion proof lighting

store lubricants with other flammable materials

To align multi-strand sprockets you should use the ____________.

straight edge

The most important consideration in the selection of a lubricate for a chain drive system is ____________.

temperature

Detergent additives are used in oils _________________.

to break up and wash away deposits

The common method of mounting no hub sprockets is ______________.

to weld them to the shaft

When lubricating a pillow block bearing, the user attaches the coupler into the grease fitting and slowly pumps the handle of the grease gun ________________.

until new grease begins to flows out of the bearing