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A higher volt will also be able to handle bigger bits and blades. The higher the volt, the more power it can use for higher drain applications. You can think of volts as horsepower for cordless tools. Volts is the force and is most commonly used in cordless tool measurements. So, in reality, it is not a realistic number measure. If you did that to your tool you would burn the motor out very quickly because of the high current and high heat build up. This is a bogus measure because it shows the highest output possible. Most manufacturers use peak power (stalling point) as the higher number. Again horsepower is misleading because it is a mathematical equation and the manufacturer can either use sustained or stalled torque and thus you can get two different numbers.
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Horsepower is a mathematical expression of the relationship between speed and torque. When it comes down to it, it’s just a big marketing scam. The will take a measurement at the end of the bit. Other manufacturers test torque after the transfer. Some companies take a torque measurement on the inside of the tool before torque is even transferred. There is no standard of torque measurement so be careful. A stalled motor is the worst thing you can do as it creates more amps which create more heat. If you get a motor to stall, its torque is maxed out.
#VOLT VS WATT VSAMP FULL#
Most torque ratings show the tool at no load speed (when the tool is running at full power and not actually making a cut). So when you think you are actually getting a bargain, you are actually getting ripped off. Well, the gearing is different, the quality of parts is different and some other very important things are different.
#VOLT VS WATT VSAMP PROFESSIONAL#
Have you ever wondered why a no name brand tool has the same amps and same torque, but can be a 1/3 of the cost of a professional power tool. A lot of the torque comes from how well the gear system is designed. One might have an amp rating of 3Ah, while the longer running tool will have 6Ah. You can have two 18V batteries, but one might run longer than another because it has a higher amp rating. Regarding cordless tools, the more amps the battery has, the longer the tool will run. They must be the same, right? Wrong, even though they both have 15 amps, a worm drive can transfer the power to the blade more efficiently than the inline version giving the worm saw more torque. Take two circular saws for example that both have a 15 amp rating. Notice when you’re popping the breaker your tool is probably bogging down causing more heat to build up and in return drawing more amps.Īnother misconception is that because two tools have the same amp rating they must be the same. Have you ever popped a circuit breaker on the panel? This can be annoying, but it protects your tools. With this in mind, more amps can be good because motors will run longer and won’t heat up as fast. Amps basically measure how effectively the motor cools itself, not how much power it has. So amps measures or indicates the maximum time a tool can continuously run without exceeding the temperature limits. The faster a motor can spin the more air it can draw through the motor to help cool it down. So in essence how much can the motor absorb and dissipate heat. In a UL tested tool, the motor is tested to verify that it can run or operate below a specific temperature while current or electricity is flowing through it. AmpsĪ tools amp rating indicates the electrical current load a motor can carry for an indefinite period of time without degrading the insulation and other electrical compounds of the motor. Over the years we have received numerous emails on this topic, so we tried to put something together to explain each one and the ins and outs without getting too technical or complicated. Why are some tools rated in amps, some in horsepower and others in volts? Good question.