Winter hot cars have tricks

Winter hot car is a common move before the owners travel, as to how to warm up the car, and some owners may not be very clear, experts tell the car owners how hot car. Overnight hot car: Slow driving at low speed For the hot car and long time no car owners get up early in the morning, the usual practice is to use idling hot car, 35 minutes later on the road, "this traditional practice It is very unscientific, delayed the travel time does not say that its exhaust emissions, waste of energy is indeed undesirable, "Guo Haizhi said more scientific hair is the car started, the owner immediately check the car dashboard above A variety of instrument lights to see if the various components of the light is normal, if there is no problem, the owner can slow low-speed driving method to hot car, travel time, energy use correct. A car owners have proposed that for a long time do not have a car, such as starting the engine after overnight, the engine does not have the upper part of the oil, whether to wait for dozens of seconds after the car started only when the engine oil pump operation to deliver the most needed Lubricated piston, connecting rod and crankshaft and other components. New car engine: speed not to exceed 2500 rpm Experts said that for the oil pump to deliver the oil to the engine most in need of lubrication of the piston, connecting rod and crankshaft and other components, will not take so long, some oil, especially better oil, will There mucosal attached to the relevant components, even after starting the car, even if there was no oil, but its mucosa will also play a role in lubrication protection. At the same time, the cold engine to reach the normal working temperature of about 100 ℃, it takes about six minutes, during this time, do not need the original hot car, as long as no step on the accelerator, not high-speed operation, to maintain low-speed operation, is not Will damage the engine parts. Experts advise new car owners, the new car has not been run-in period, the number of kilometers did not reach 10,000 to 20,000 kilometers, both in hot cars or driving, the engine speed should not be too high, it is best not to exceed 2500 rpm.

Drill and tap set

Taps and dies are tools used to create purpose screw threads, which is called threading. Many are cutting tools; others are forming tools. A tap is used to cut or form the female portion of the mating pair (e.g. a nut). A die is used to cut or form the male portion of the mating pair (e.g. a bolt). The process of cutting or forming threads using a tap is called tapping, whereas the process using a die is called threading.
Using an ordinary tap or die to clean threads generally removes some material, which results in looser, weaker threads. Because of this, machinists generally clean threads with special taps and dies-called chasers-made for that purpose.

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