30 Questions
Where is the smaller sheave typically mounted when the belt is used for speed reduction?
On a high-speed shaft
What is the side of the belt that experiences an increase in tension when transmitting power known as?
Tight side
What causes the belt to grip the driving sheave when transmitting power?
Friction
Which type of belt is often made from leather or rubber-coated fabric?
Flat belt
What is the larger sheave mounted on when using a belt for speed reduction?
Driven machine
What provides exceptionally low friction between the chain and the sprockets in a roller chain?
The roller on each pin
How is the pitch of a roller chain usually illustrated?
As the distance between the centers of adjacent pins
What suffix is used to indicate heavy-duty sizes in roller chains?
H
What does ISO-606 style of chain have basically the same design dimensions as?
U.S. standard roller chains
In agricultural equipment, what systems employ many chain drives for actuation?
Tractor accessories
What is the driving force in flat belts limited by?
Pure friction between the belt and the sheave
Why are flat belts preferred for delicate machinery?
To prevent high torque levels that could damage the machine
What is a characteristic of synchronous belts in terms of drive mechanism?
Positive drive limited by tensile strength and shear strength of teeth
What contributes to the stress in a belt around sheaves?
Bending around sheaves, especially on the tight side
What is the recommended minimum sheave diameter for standard belts?
Using smaller sheaves drastically reduces belt life
What is the purpose of attachments in roller chains?
To facilitate connection to rods and buckets
What are the three modes of failure considered when rating a chain's power transmission capacity?
Fatigue of link plates, impact of rollers, galling between pins and bushings
What lubrication method is recommended for chain drives according to the text?
Petroleum-based lubricating oil
What does the power capacity of a chain drive depend on?
The speed of the smaller sprocket and expected life
How do multiple strands of chain affect the power capacity?
They have no impact on power capacity
What is the primary difference between a 5V belt and a 5VX belt?
The smooth inner surface
What is the recommended maximum reduction ratio for a plain V-belt drive?
6:1
Why should the shafts carrying mating sheaves be parallel and the sheaves be in alignment?
To ensure smooth belt tracking
What should the angle of wrap on the smaller sheave be according to the provided text?
Greater than 120°
Why are matched belts required in multibelt installations?
To ensure smooth belt tracking
Which lubrication method involves applying oil with a brush or a spout can at least once every 8 hours of operation?
Manual or drip lubrication
Which lubrication method involves continuously dipping the chain into a sump of oil provided by the chain cover?
Bath or disc lubrication
Which lubrication method involves an oil pump delivering a continuous stream of oil to the lower part of the chain?
Oil stream lubrication
Which lubrication method does not require the chain to dip into the oil directly?
Bath or disc lubrication
Which lubrication method involves feeding oil directly onto the link plates of each chain strand?
Manual or drip lubrication
Learn about transmitting power between rotating shafts using chain drives. Explore the most common type of chain, roller chain, which provides low friction between the chain and sprockets. Discover different types of extended link designs used in conveyor applications.
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