Waveshare DDSM115 Direct Drive Servo Motor All-In-One Design Hub Motor
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Waveshare DDSM115 Direct Drive Servo Motor All-In-One Design Hub Motor
Waveshare DDSM115 Direct Drive Servo Motor All-In-One Design is a high-reliability Servo Motor that integrates an outer rotor brushless motor, encoder, and driver into a compact unit. By adopting advanced direct drive technology, the DDSM115 Servo Motor eliminates the need for a reducer, reducing noise, cost, and mechanical inefficiency. With low-speed, high-torque performance, IP54 protection, and multiple feedback modes, the Waveshare DDSM115 is ideal for robotics, automation, and industrial applications requiring precision and durability.
Features
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Direct Drive Servo Motor – No reducer, zero backlash, and near 100% drive efficiency.
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All-in-One Design – Integrated motor, encoder, and driver for compact structure and high reliability.
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Ultra-low noise – Noise level ≤50dB, suitable for quiet environments.
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High precision feedback – Position, speed, current, and error codes available via RS485 communication.
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Fast response – Direct drive ensures smooth torque and accurate positioning.
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Multiple operating modes – Current loop, position loop, and velocity loop supported.
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Safety features – Hall position detection, over-current protection, and electric brake support.
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IP54 protection – Dustproof and water-resistant for longer service life.
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Closed-loop control – Real-time feedback including temperature, velocity, and current.

Specifications
| Specification | Details |
|---|---|
| Rated Voltage | 18V DC (5S LiPo) |
| Rated Speed | 115 rpm |
| No-load Speed | 200 ±10 rpm |
| Rated Torque | 0.96 Nm |
| Locked-rotor Torque | 2.0 Nm |
| Rated Current | 1.25 ±0.05 A |
| Locked-rotor Current | ≤2.7 A |
| No-load Current | ≤0.25 A |
| Encoder Resolution | 4096 |
| Rotor Inertia | 1.67 kg·m² |
| Torque Constant | 0.75 Nm/A |
| Speed Constant | 11.1 rpm/V |
| Phase Resistance | 2.15 Ω |
| Phase Inductance | 3.6 mH |
| Number of Pole Pairs | 10 |
| Noise Level | ≤50 dB |
| Mechanical Time Constant | 30 ms |
| Operating Temperature | -20 ~ 45°C |
| Protection Level | IP54 |
| Weight | 765 ±15 g |
Application
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Home Robots – Quiet operation and precise control for domestic robotics.
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Industrial Robots – High torque and reliability for automation systems.
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Fitness Equipment – Smooth motion and durability for smart exercise machines.
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Food Delivery Robots – Compact design and IP54 protection for service robotics.
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Commercial Robotics – All-in-one integration reduces complexity and improves efficiency.
Part List

Dimensions

Resources & Services
WIKI: www.waveshare.com/wiki/DDSM115
More Detail
Multiple Operating Modes
The Waveshare DDSM115 Direct Drive Servo Motor All-In-One Design supports multiple operating modes including current loop, position loop, and velocity loop. This makes the DDSM115 Servo Motor highly versatile for robotics and automation projects.
RS485 Communication Support
Only one RS485 bus is required to achieve centralized control of multiple Waveshare DDSM115 Servo Motors, simplifying system design and ensuring reliable communication.

Closed-loop Control with Multiple Feedback
The Waveshare DDSM115 Servo Motor provides closed-loop control and multiple feedback options including temperature, position, velocity, and current. This ensures precise monitoring and stable performance.
Temperature Feedback
Position Feedback

Speed Feedback

Current Feedback

Integrated Direct Drive Design
The Waveshare DDSM115 Servo Motor features an integrated direct drive design, delivering smooth torque, steady speed, and accurate positioning without the need for an external reducer. This compact and highly integrated structure improves efficiency and reliability.

Excellent Low-Speed Performance
The DDSM115 Servo Motor achieves speeds as low as 1 RPM with torque up to 2.0Nm, making it suitable for precise robotics and automation tasks.

Waterproof & Dustproof Protection
With an IP54 protection rating, the Waveshare DDSM115 Servo Motor is safeguarded against dust and water jets, ensuring longer service life and reliable performance in demanding environments.

1. General Shipping Information
- We provide reliable shipping services with a tracking number for each order.
- Shipping addresses must be entered in English and should not contain special symbols, so that the courier system can recognize your location correctly.
- Please make sure your shipping address is accurate before placing your order. We ship strictly according to the address provided at checkout.
- In-stock orders are usually dispatched within 1 business day after order confirmation.
- Estimated delivery times refer to the period after dispatch and do not include order processing time, weekends, public holidays, customs inspection, or force majeure delays.
- If you need to cancel or modify your order, please contact us before the order is marked as “Shipped”. Once shipped, the order cannot be canceled or changed.
🚀 Need Faster Shipping?
If you require expedited shipping, please contact our customer support team at info@openelab.io for a customized quote based on your destination.
2. Shipping Rates & Options
Shipping rates are calculated based on order value, destination, and available shipping methods. The final available options will be displayed at checkout.
2.1 Germany Domestic Shipping
| Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|
| Deutsche Post | €0.00 - €50.00 | €4.95 | 2-4 Business Days |
| Deutsche Post | Over €50.00 | Free | 2-4 Business Days |
|
DHL Paket (Faster Delivery) |
€0.00 - €50.00 | €6.95 | 1-3 Business Days |
|
DHL Paket (Faster Delivery) |
€50.00 - €100.00 | €2.00 | 1-3 Business Days |
|
DHL Paket (Faster Delivery) |
Over €100.00 | Free | 1-3 Business Days |
2.2 Selected EU Countries / Regions
Available EU shipping destinations are shown at checkout based on your shipping address. For orders shipped to selected EU countries or regions outside Germany, we use FedEx Regional Economy.
| Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|
| FedEx Regional Economy | €0.00 - €100.00 | €7.95 | 3-5 Business Days |
| FedEx Regional Economy | Over €100.00 | Free | 3-5 Business Days |
EU orders may be fulfilled from our Munich warehouse or, when applicable, from our Shenzhen warehouse depending on inventory availability. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.
2.3 United States
| Region | Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|---|
|
Continental U.S. (50 States) |
USPS Ground Advantage | €0.00 - €45.00 | €4.95 | 3-7 Business Days |
| USPS Ground Advantage | Over €45.00 | Free | 3-7 Business Days | |
| USPS Priority Mail | €0.00 - €45.00 | €16.95 | 1-4 Business Days | |
| USPS Priority Mail | Over €45.00 | €14.95 | 1-4 Business Days | |
|
Non-Continental U.S. (AK, HI, PR, etc.) |
USPS Ground Advantage | €0.00 - €60.00 | €6.95 | 5-9 Business Days |
| USPS Ground Advantage | Over €60.00 | Free | 5-9 Business Days |
Non-Continental U.S. regions include Alaska, American Samoa, Guam, Hawaii, the Marshall Islands, the Northern Mariana Islands, Palau, Puerto Rico, the U.S. Virgin Islands, and U.S. Armed Forces addresses.
2.4 International Destinations Outside the EU
For selected international destinations outside the EU, including Switzerland, the United Kingdom, and Norway, shipping rates are as follows:
| Order Amount | Shipping Cost |
|---|---|
| €0.00 - €300.00 | €19.95 |
| Over €300.00 | Free |
For non-EU destinations, import duties, taxes, and customs fees may be charged by the destination country and are the responsibility of the recipient.
3. Warehouses & Fulfillment
Our products may be stored in our Munich, Arlington, and Shenzhen warehouses. The actual shipping warehouse depends on product availability and destination.
3.1 Munich Warehouse
For products stored in our Munich warehouse, we use Deutsche Post or DHL Paket for domestic deliveries within Germany. For selected EU destinations outside Germany, we use FedEx Regional Economy.
3.2 Arlington Warehouse
For products stored in our Arlington warehouse, we use USPS or UPS for deliveries within the United States.
3.3 Shenzhen Warehouse
For pre-order items or products fulfilled directly from our Shenzhen warehouse, we arrange reliable international shipping based on destination and inventory status. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.
4. Inventory, Pre-orders & Split Shipments
- Inventory Status: Please check the product page for real-time stock information. If an item is out of stock in our local warehouses, it may be marked as “Pre-order”.
- Pre-order Fulfillment: Pre-order items may be shipped directly from Shenzhen or restocked to a local warehouse first before final delivery.
- Split Shipments: If your order contains both in-stock and pre-order items, we may ship them separately. No additional shipping fee will be charged for split shipments caused by our fulfillment arrangement.
5. Customs, Taxes & Delivery Issues
5.1 Customs and Taxes
For EU Member States:
Whether shipped from Germany or China, OpenELAB covers applicable import duties and taxes under DDP service where required. Customers in EU member states should not be charged additional import duties or VAT upon delivery.
For destinations outside the European Union, such as Switzerland, Norway, and the United Kingdom, import duties, taxes, and customs fees may be charged by local authorities upon delivery. These fees are the responsibility of the recipient.
5.2 Damaged, Delayed, or Lost Parcels
Please inspect your parcel upon delivery where possible. If you notice visible damage, please report it to the courier and contact us as soon as possible. This does not affect your statutory consumer rights.
If your parcel is delayed, lost, returned to sender, or the tracking information has not updated for an unusual period of time, please contact us at info@openelab.io. We will assist you in checking the shipment status with the courier.
5.3 Incorrect Address or Failed Delivery
If a parcel cannot be delivered due to an incorrect or incomplete address provided by the customer, refusal of delivery, or failure to collect the parcel, additional shipping or return costs may apply.
6. VAT
For orders within the EU, VAT is collected at checkout according to the applicable destination rules. No additional VAT should be collected upon delivery for EU member state orders covered under our DDP shipping arrangement.





