The working principle and usage of the Variable speed electric drill
Variable speed electric drill is a drilling tool powered by AC power or DC battery. It is a kind of hand-held electric tool. It is also called electric hammer in some industries to make holes in objects or penetrate objects.
The main components of the electric hand drill: drill chuck, output shaft, gear, rotor, stator, casing, switch and cable.
Hand Drill (Pistol Drill) - A tool used for drilling holes in metal materials, wood, plastic, etc. When equipped with forward and reverse switches and electronic speed control devices, it can be used as an electric screwdriver. Some models are equipped with rechargeable batteries, which can work normally without external power supply for a certain period of time.
The speed switch changes the average current power on the load from 0-100% by changing the duty cycle of the output square wave, thereby changing the load, light brightness/motor speed. Using pulse width modulation (PWM) to realize dimming/speed regulating, its advantage is that the energy power of the power supply can be fully utilized, and the efficiency of the circuit is high. For example: when the output is a 50% square wave, the output energy power of the pulse width modulation (PWM) circuit is also 50%, that is, almost all the energy is converted to the load. When using the common resistor step-down speed regulation, in order to make the load obtain the maximum power of 50% of the power supply, the power supply must provide more than 71% of the output power, of which 21% is consumed by the voltage drop of the resistor and heat consumption. Most of the energy is consumed in the resistance, the rest is the output energy, and the conversion efficiency is very low. In addition, the heat consumption of HW-A-1040 type speed control is almost non-existent due to the switch mode, and the torque of HW-A-1040 type speed control is very large at low speed, because the speed governor is equipped with automatic tracking PWM, and pulse width modulation is also used. (PWM) mode, which can make the load get almost full power supply voltage during operation, which is beneficial to overcome the internal coil resistance of the motor and make the motor generate greater torque power.
Parameter:
Our advantage
1.Small body, easy to carry
2.high strength, high efficiency, more durable, continuous high-intensity use
3. Small loss, strong power
4. Innovation design
5. Excellent Workmanship
6. Accept customized request
7. Competitive factory price
8. High quality
9. Excellent service
Package & Shipping
We usually use standard export packaging.
It is available to provide specific package according to your requirements.
Ningbo/shanghai PORT
Certificates
We can promise the quality, passed the CE certification.
Workshop
FAQ
Q1: Is sample free of charge?
A: Sample fee will be returned in the 1st PO payment .
Q2: How long it takes to ship 1 sample to my country?
A: We have inventory for samples, normally the leadtime is 7 days to arrive at your office.
Q3: MOQ?
A: 500pcs with customized logo and color; 200pcs with our standard color.
Q4: Can we use our own logo?
A: Yes, we can print your private logo according to your request.
Q5: What’s your MOQ?
A: If we have the products in stock, it will be no MOQ. If we need to produce, we can discuss the MOQ according to customer’s exact situation.
Q6:What is your payment term?
30% deposit, before loading container, the buyer supposed to pay the full balance when the goods ready.
Q7: Which payment form you can accept?
A: T/T, Western Union, PayPal etc. We accept any convenient and swift payment term.
Q8: How long is your delivery time?
A: The general delivery time is 30-45 days after receiving your order confirmation. Anther, if we have the goods in stock, it will only take 1-2 days.
Q9: Why choose us ?
We are professional manufacturer of power tools, also sell hand tools, Air Tools, Auto Supplies. We have experience in export trading for twenty years. If you choose us, No need to worry about Production/Payment/Quality/Shipping/Customs Declaration.
Q10: What’s is your shipping service?
A: We can provide services for vessel booking, goods consolidation, customs declaration, shipping documents preparation and delivery bulk at the shipping port.
Usage matters:
1. The electric drill should be idled for 0.5-1min before use, and check whether the transmission part is flexible, whether there is abnormal noise, whether the screws are loose, whether the spark of the commutator is normal.
2. For hand drills with metal casings, protective grounding (connecting to zero) measures must be taken.
3. Before use, make sure the switch of the electric drill is off to prevent the electric drill from turning suddenly when the plug is inserted into the power socket.
4. Check the power cord for damage before use. If there is, it must be wrapped with insulating tape. During use, it must not be soaked in water, dragged or trampled, and it must not touch heat sources and corrosive media.
5. Hold the electric drill firmly with both hands when drilling, try not to operate with one hand, and master the correct operating posture.
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