1638 Coreless Motor with Planetary Gearbox

Customizations on request.
Looking forward to work with your esteemed company .

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Product Details


  • Customizations on request.

  • Looking forward to work with your esteemed company .

  • The stator windings is cup-shaped winding, without cogging effect, the torque fluctuationis very small.

  • We offer price is based on new and original parts, but we can according to your order quantity , providing a discount.

  • We only offer new and original parts.


Sandard Parameters:


1638 Series  6121824 
Rated Voltage                        6121824V
Armature Resistance                 1.35.81526.9


Max Output                          5.715.585.015.03W
Max Effect                         71737475%

No-load Speed                        7000750072007200RPM
No-load Current                  0.0890.070.0630.059A
Stall Torque                  31.328.526.726.8mNm
Friction Torque            

Speed Constant                       1285660415310rpm/V
Back Electromotive Force Constant    0.7781.5152.413.226mV/rpm
Torque Constant                      7.4314.4823.0230.82mNm/A
Current Constant                    0.1350.0690.0430.032A/mNm

Speed/Torque Slope                  225265270270rpm/mNm
Rotor Inductance                    35135340600


Mechanical Time Constant   
Rotor Moment Of Inertia    
Angular Acceleration                 174178178179.103rad/s2


(Remarks:Above the specifications just for your review only,customized according to your need.)
DC Gear Motors
Autotrol is a leading manufacturer of iron core (brushed), brushless and coreless DC gear motors. We offer an extensive selection of custom designed gear motors to precisely match your requirements. This includes a wide selection of motors, voltages, shaft configurations and output speeds for low and high torque products. Our in line and offset gear motors can also be equipped with encoders for accurate motion control.  
Permanent magnet DC gear motors provide high torque in small packages. Their linear performance characteristics make them suitable for many applications requiring controllable performance.


Dental Handheld Tools

XBD-1638 Applications
Tattoo machineAutomatic-curtainsTattoo-machineRobot-jointsSex-supplies
Model-aircraftSmall electric testModel aircraftRotary-tattoo-machineDental Handheld Tools


can combined with gear/ encoder/ gearbox/gearbox+encoder












Structure diagram





The company attaches importance to product quality, strict management, fine workmanship, production quality and product defects rarely or almost no, so the level of high quality products, so the price of the product is also high.
Motor Construction
Brushed DC motors depend on a mechanical system to transfer current, while AC and brushless DC motors use an electronic mechanism to control current.  The brushed motors have a wound armature attached to the center with a permanent magnet bonded to a steel ring surrounding the rotor. As the brushes come into contact with the commutator the current passes through to the armature coils.
In AC induction motors the rotor turns in response to the "induction" of a rotating magnetic field within the stator, as the current passes.  Rather than inducing the rotor in a brushless DC motor, permanent magnets are bonded directly to the rotor, as the current passes through the stator, the poles on the rotor rotate in relation to the electromagnetic poles created within the stator, creating motion.
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Brushed Motor Construction     AC Motor Construction       Brushless Motor 


World's first electric motor

1828 was the year the world saw the first practical electric motor. Hungarian inventor Ányos István Jedlík called it an “electromagnetic self-rotor“. It was the first continuously rotating electric motor, and it had all the components of a DC motor (a stator, rotor, and commutator).

His invention remained hidden from the rest of the world for more than 15 years, so it had no real influence on the development of motors of today. The rotating electric motor of Moritz Jacobi in 1834 was the real start.


Trading Info

1.Trade Terms: FOB,CIF,EXW.

2.Delivery Time: 7-15 working days after deposit;3-4 working days for inventory.

3.Shipping: By air,by express and by sea delivery.
4.Packing: Standard Export Carton.
5.Payment terms: T/T,Western Union,PayPal,MoneyGram.
6.Payment Condition:30% deposit advance,70% balance after deliver at best.
(GIVE YOU the most convenient and fast way to trade)


1Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample and some for free but others not. We do not pay the cost of freight.
2Q:What's the payment term?
A:For small amount,we accept 100% payment via Paypal
For large amount,we accept TT.
3Q: Is there a MOQ for your motors?
A: Yes. The MOQ is 1,000pcs for different models after sample approval. But it's also okay for us to accept smaller lots like a few dozens, hundreds after sample approval.
4Q:What 's the lead time of mass production?
A : About 2-4 weeks.
5Q:Are there any extra import taxes for the custom?
A: In general, most of the customs won't charge extra taxes for a parcel valued less than 80USD, and we will do our best to help our customers avoid it, and buyer should bear with the import tax if applicable. You are suggested to consult your customs/broker before the delivery.
6Q:Can i be your company sale agent in our market?
A:Yes,we will depend on the sales turn over and also do research on your market. Please contact with our sales person for details.

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  • Building 25, Feipeng Industry Park, Fumin Industry Zone, Pinghu Town, Longgang District, Shenzhen City, China.

  • wanling@sinbad-motor.com

  • +86-755-85215266

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