Changzhou Vic-Tech Motor Technology Co., Ltd.
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High speed 2:1 to 1000:1 gear ratio N20 DC brushed motor with GB12 gear ratio
This is a N20 DC motor with gearbox.
N20 is typical brushed DC motor, and for a single motor, unloaded speed is about 15000RPM.
When the motor is attached with a gearbox, it’s speed with be much lower, and its torque will be much bigger.
The gear ratio is 2:1 to 1000:1
For gear ratio below 420:1 (including 420:1), gearbox length is 9mm.
For gear ratio over 420:1, gearbox length is 12mm
Motor Parameters:
| Motor type | N20 DC motor+gearbox |
| Rated voltage | 3V/6V/12V DC |
| Unloaded speed(single motor) | 12000~16000RPM |
| Loaded torque(single motor) | About 3g*cm |
| Output shaft | D shaft/M3 lead screw |
| Gearbox length | 9mm/12mm |
| Output speed | Single motor speed/gear ratio |
| Output torque | Single motor torque*gear ratio* efficiency |
Gearbox Parameters:
| Gear ratio | 2:1 | 5:1 | 10:1 | 15:1 | 20:1 | 30:1 | 36:1 | 50:1 | 63:1 | 67:1 | 89:1 | 100:1 |
| Precise ratio | 2.002 | 4.995 | 9.677 | 14.754 | 20.501 | 29.120 | 36.122 | 51.103 | 63.071 | 66.801 | 89.227 | 99.002 |
| Tooth number | 23 | 20 | 13 | 18 | 15 | 12 | 20 | 20 | 14 | 17 | 14 | 13 |
| Gear levels | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 |
| Efficiency | 80% | 80% | 80% | 72% | 72% | 72% | 65% | 65% | 65% | 65% | 65% | 65% |
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| Gear ratio | 110:1 | 150:1 | 172:1 | 210:1 | 250:1 | 275:1 | 298:1 | 380:1 | 420:1 | 500:1 | 600:1 | 1000:1 |
| Precise ratio | 110.407 | 150.948 | 171.883 | 210.591 | 250.111 | 274.403 | 297.924 | 387.689 | 421.296 | 506.155 | 599.394 | 986.406 |
| Tooth number | 12 | 18 | 13 | 12 | 13 | 12 | 12 | 12 | 12 | 18 | 16 | 12 |
| Gear levels | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 7 | 7 | 7 |
| Efficiency | 59% | 59% | 59% | 59% | 59% | 59% | 59% | 59% | 59% | 47% | 47% | 47% |
Design drawing:
Product display:
About DC brushed motors:
DC brushed motors are most commonly used motors on the market.
It has electrical brush inside, and it has positive and negative pins (+ and -)
DC motor’s speed can be controlled with different gear ratios, or PWM control. (Pulse-Width Modulation)
With gearbox torque boost, DC motor can reach much higher torque, compared to motor’s original torque.
Advantage of DC brush motors:
1. Cheap price
2. Small size
3. Easy to connect, easy to use
4. Commonly used
5. Fast speed
6. High efficiency (compared to stepper motor)
DC motor with gearbox:
Gearbox can boost motor’s torque, and reduce motor’s speed
We have different gear ratios for you to choose, also gearbox’s efficiency is related to gear levels.
Output torque=original torque*gear ratio* gearbox efficiency
Output speed= original speed/gear ratio
Samples are packed with foam sponge inside paper box.
For mass production, products are packed in paper carton.
For sea shipping (Mass production), cartons are packed on pallet.
Shipping time:
By express(DHL/ UPS/ Fedex/ TNT): 5~12 days
By 4PX express: 10~20 days
Sea shipping: 40~60 days (depends on different countries)