1.Features
1). High efficiency
2). Long operating life
3). Low noise
4). Good temperature rise
5). Good balance
6). The most available design for the optimized running.
2 Dimension
3 Â Product Photo
4  Specifications  Nema17 42 SeriesÂ
| Model | DMW421 | DMW422 | DMW423 | |
| Â Voltage | V | 24 | ||
|   No load speed | rpm | 5000 | 5000 | 5000 |
|  Rated torque | Nm | 0.063 | 0.094 | 0.125 |
|  Rated Speed | rpm | 4000 | 4000 | 4000 |
|  Rated Current | A | 1.7 | 2.5 | 3.5 |
| Â Torque(max) | Nm | 0.19 | 0.27 | 0.38 |
| Â Back-EMFÂ constant | V/Krpm | 3.13 | 3.13 | 3.15 |
|  Torque Constant | Nm/A | 0.039 | 0.04 | 0.04 |
| Â Resistance | ohm | 1.5 | 0.53 | 0.74 |
| Â Weight | Kg | 0.3 | 0.4 | 0.5 |
| Â Length | mm | 41 | 51 | 6 |
5 Company Show
6 Main Product
Changzhou Shnmotor is a developing manufacturing and trading company which aims at the electrical products of refrigeration market. We have a highly qualified team, which has over eight years experience on Machinery designing, manufacturing, managing and customer service concept heart & soul. ISO 9000 standard and 6S management guarantee the most effective quality control on every part and every process of the products.Â
Our Main Products as below:
1)Brushless DC Motor
2)Setpping MotorÂ
3)AC Motor
4)Motor Group
(Motor+Reducer+Driver+Brake)
7 Packing & Delivery
8 Application
CNC machine:Â engraving machine, milling machine, coiling machine, sparking machine, wire-electrode cutting and so on.
Electronic equipment:Â up-coiler, stripping machine, lithum battery production equipment, dispensing machine and so on.
Packaging equipment:Â filling machine, fixed length cutting machine, tissue paper machine, paper diaper equipment and so on.
Textile equipment:Â flat knitting machine, hosiery machine, embroidery machine, spinning machine, knitting machine and so on.
Laser machine: screen printing machine, pad printing machine and so on.
Printing equipment: carving machine, cutting machine, labeling machine and so on.
Others : Robot , unmanned aerial vehicle and so on .
9Â Buyer's Guide
1.Motors production
All the products we sold here are manufactured by czshn motors and electric appliance factory ,Changzhou , Jiangsu Province ,China.
2.Motors selection
Please contact us to confirm the model and other details of the motor before purchase.Â
3.PaymentÂ
We can serve samples and accept fully prepayment only . 50% advance is needed for bulk purchase and balance before shipment .Paypal, Western Union, T/T are all accepted.
4.Delivery
Samples in stock can be delivered within 7Â days and customized samples within 30 days. Delivery date for bulk order depends on quantity.
5.Feedback and after-sale serviceÂ
Any problems in using are welcome to be informed ! Our technician will give you professional advise . We will give you free maintenance within 24 months if the flaws are the result of production .
FAQ
Q: How to choose a motor to match my machine?
A: Please give us the key parameters of the motor. Here are some important specifications we need : holding torque, physical size (diameter ,length etc.),  voltage, current etc. Feel free to contact us and give the information, we are very glad to help you if you are confused in selection.
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Q: If I need a special motor , can you manufacture?
A: Certainly, you can. If you want to replace a motor in an existing application,please send us a drawing or sample and we can help you find a suitable replacement. Or, you can contact us and describe your application, our engineers will work together with you to find a solution tailor-made for you.
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Q: Do you have any products in stock? Can IÂ order samples first?Â
A: We stock many of our standard models. If you would like to test a sample first, we are glad to send some your way. Of course we do not stock specialized motors. If you have special needs, please let us know and we will try our best to send you samples as soon as possible.
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Q: How long should IÂ expect the lead-time/delivery to be?
A:  If you are ordering samples of standard models, we can usually have them shipped and delivered within 15 days by air. When requesting custom motors, please allow us a 4-5 week lead-time.
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Q: How are your products delivered?
A: We are very flexible with shipping and have dealings with most major courier services around the world. When placing an order, simply provide us a shipping address and contact information, we will handle the rest. If there is a forwarder or courier you prefer to use, just let us know and we will accommodate.
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Q: What about the quality of your motors?Â
A: Delivering quality products is an absolute priority for us. We have test procedures throughout the manufacturing process starting from individual components. If you need a specialized motor from us, we also augment our existing test plans with custom testing solutions. In the rare case that an issue does arise, we will work with you to solve any problems in a timely and transparent manner.
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Q: Can you provide OEM services? Can IÂ request my own logo?
A: Yes, we can provide OEM services for volume production. Feel free to talk to us about your branding needs.
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