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Something with a low coefficient of friction such as PVC or PTFE polymers
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∙ 13y ago
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What is the difference between friction and antifriction bearing?
in friction type the bearing metal is direct contact with shaft metal, but in the antifiction the rolling element is contact with the bearing races only.
How can friction be reduced between two surfaces?
A lubricant such as oil, grease, graphite powder or PTFE can reduce the friction between two surfaces. Or using metal balls to space them and reduce the contact surface area as used in ball bearings.
What is lubricant-?
Generally, lubrication means the addition of a substance that reduces friction between two parts. Metal pieces use WD40. Cars can use 30 or 40 weight oil. Same with lawnmowers, small appliances, furnace blowers, etc. For sexual areas, lubrication is a liquid, such as K-Y Jelly, that makes the erect penis more slippery and decreases friction. It allows for easier penetration into the vagina and adds more of the "wet" feel. NOTE: Never use petroleum oils made for metals on any part of the human body!
What type of friction is there?
1) Static Friction: When it's hard to move an object (i.e.: moving a large refrigerator box is difficult because of the large mass pressing down and the static friction between the box and the floor)2) Sliding Friction: Tiny friction particles in between objects that slow them down (i.e.: moving a cafeteria tray in the lunchline--there's a little bit of friction between the tray and the metal bar, which causes the tray to move slowly)3) Rolling Friction: The friction between wheels (or anything rolling) and the ground. (i.e.: riding a bike. Without rolling friction, we would speed out of control. Walking would also be impossible because our feet collide with the pavement and gently roll off. With no friction, we'd be slipping and sliding everywhere! =D)
What are the disadvantage of friction?
With friction, you aren't able to go SUPER fast (if you like going SUPER fast). Friction slows us down.It depends on the situation. In some cases, yes; in some, no. Take the example of a car. Friction between the moving metal surfaces inside the engine results in wear on the parts. For the brakes, sliding friction between the break disc and the pads is what stops the car.
Why is oil important in a car?
Because it lubricates. Instead of metal-on-metal contact, it puts a film of oil between the metal components, so that it's fluid friction, rather than friction between two solids - the latter of which causes excess wear and can actually fuse components together.
How ball bearing reduce friction?
Bearings reduce friction by providing smooth metal balls or rollers, and a smooth inner and outer metal surface for the balls to roll against. The smoothness of the metal reduces the friction and the surface area.
How does oil reduce air friction?
Oil is mainly used to reduce friction between contacting surface, e.g., metal on metal - not to reduce air friction.
What are the similarities between soldering and welding?
In soldering and welding, 2 or more pieces of metal are joined by melting metal at the interface between them. When the molten metal cools and hardens, it physically bonds the pieces together.
You put oil in the engines of vehicles to cut down on frictionExplain why it is important to do this?
The oil leaves a thin film on a metal surface. This allows the moving parts to come in contact without producing friction which produces heat. It also reduces the amount of metal that is worn away between contact with two metal surfaces.
What is the difference between friction and antifriction bearing?
in friction type the bearing metal is direct contact with shaft metal, but in the antifiction the rolling element is contact with the bearing races only.
How does lubricating machinery-such as the chain on your bike reduce friction?
The surface tension between the metal on your chain pieces is high. The surface tension is low on lubricants like oil or graphite so putting them between moving surfaces provides a opposing surface for both materials that has a low friction.
Why do metals stick together when they react?
It's because of the friction between each metal.
Why do drivers use motor oil on their vehicles?
Reduces wear between the internal metal parts.
Why you oil your bicycles regularly?
Reduce friction and oxidation.To keep it from rusting, to reduce wear and unwanted friction.It keeps the chains from rusting.Whenever two objects rub against each other they create friction which reduces their freedom of movement. An application of oil, which is a lubricant, reduces the amount of friction thus allowing the objects to move more freely. Also, oil may be applied as a rust retardant for metal parts of the bicycle.
Why are car engines made from low density metal like silicon nitride?
Silicon nitride is not a metal. It is a very hard ceramic material, typically used in high-friction environments (such as the ball bearings in a car engine) because the supreme hardness reduces the amount a part flexes, which means less surface contact and therefore less friction.
Why are tools and machines coated with greases?
The grease is there to lessen friction between two metal parts. Without grease the moving parts would heat up due to the friction.
