DAMIAO J4340P-2EC Brushless Servo Joint Motor MIT Driver Dual Encoder

SKU: DM-J4340P-2EC-24V-V3

Driver Board Version: V3

V3 V4

Type: 24V

24V 48V

Product variants

217,95 €

incl. VAT

Quantity

excl. VAT

Shipping within 72 hours

*Excluding pre-order items

📦 From 50€ in Germany, 100€ in the EU, 45€ in the US!

• EU & US Delivery: 10 working days
• Other Countries: 15 working days

🚀

Express Shipping Available:
Need it faster? Contact us via phone or email for expedited delivery.

Guarantee & Return Policy

Effective Date: December 10, 2025

At OpenELAB, we are committed to providing accurate product descriptions and high-quality electronics. The following policy outlines your rights and obligations, designed to be fair to both our customers and our business operations globally.

1. Warranty Policy

A. Standard Limited Warranty (Global & US)

For customers in the United States, Asia, and other non-EU regions:

Warranty Period: OpenELAB provides a 12-month warranty from the date of delivery.
Coverage: This warranty covers defects in material and workmanship under normal use.
Resolution: We will repair or replace defective units at no charge.

B. Statutory Rights for EU/UK Customers (EU Compliance)

If you are a consumer residing in the European Union or the UK purchasing from our global site:

Statutory Guarantee: You are entitled to a 24-month statutory guarantee for conformity defects present at the time of delivery, in accordance with EU consumer protection laws.
Relation: The Standard Limited Warranty (Section 1.A) applies in addition to, and does not replace, your statutory rights.

C. Warranty Exclusions (Applies to ALL Regions)

Warranty coverage is VOID if the damage is caused by:

Misuse: Incorrect installation, reverse polarity, or exceeding voltage limits.
Unauthorized Modification: This explicitly includes soldering, cutting pins, modifying the PCB, or flashing unauthorized/beta firmware that "bricks" the device.
Physical Damage: Drops, moisture/water damage, or electrical surges (lightning).
Normal Wear & Tear: Consumable parts (e.g., batteries), unless defective upon arrival.

Note: For non-warranty repairs (e.g., customer-induced damage), we may offer repair services for a fee. Shipping and diagnostic costs will be borne by the customer.

2. Return & Refund Policy

A. Return Window

Standard: You may request a return within 31 days of receiving your order.

B. Refund Conditions & Restocking Fees

To protect against policy abuse, the refund amount is strictly determined by the condition of the returned item.

1. Full Refund (100%)

The item is Brand New, Unopened, and Unused.
The original packaging is intact and sealed.
All accessories are present.

2. Partial Refund (Restocking Fee / Value Depreciation)
If the item is returned in a condition that prevents it from being sold as new, OpenELAB reserves the right to deduct a Restocking Fee (for US/Global) or Compensation for Loss of Value (for EU) from the refund amount.
Deductions apply if:

Signs of Use: Visible scratches, mounting marks on screw holes, or fingerprints.
Damaged Packaging: Original box is torn, written on, or missing.
Technical Modification: The device has been soldered, permanently installed, or flashed with unauthorized firmware.
Broken Seals: Anti-static bags or security seals have been opened.

Depending on the severity of the usage/damage, the deduction may range from 15% to 50% of the product price. Items damaged beyond repair due to misuse will not be refunded.

C. Shipping Costs

Defective / Wrong Item: OpenELAB covers the return shipping cost.
Customer Remorse (Changed Mind / Ordered Wrong Item): The customer is responsible for all return shipping costs to our designated return center (located in the US, Germany, or China, depending on your region). Original shipping fees are non-refundable unless required by local law.

3. Return Process (RMA)

To ensure a smooth return process, please follow these steps:

Authorization: Contact us at info@openelab.io before returning any item. Returns without prior authorization will not be accepted.
RMA Number: We will provide you with a Return Merchandise Authorization (RMA) number and the correct return address.
Packing: Ship the item back in its original packaging with the RMA number clearly marked on the shipping label (not on the product box).
Tracking: We strongly recommend using a trackable shipping method. OpenELAB is not responsible for returns lost in transit.

DAMIAO J4340P-2EC Brushless Servo Joint Motor MIT Driver Dual Encoder

DAMIAO J4340P‑2EC Brushless Servo Joint Motor is a precision actuator built for high-torque, low-speed applications in robotics and automation. Equipped with a built-in MIT driver and dual magnetic encoders, it offers absolute single-turn position feedback and maintains accuracy even after power loss. Available in 24V and 48V variants, the motor supports CAN bus communication at 1Mbps and provides real-time feedback on speed, torque, position, and temperature. With a 40:1 gear ratio, it delivers up to 27Nm peak torque, and supports trapezoidal motion profiles for smooth acceleration and deceleration. The compact form factor (57mm diameter, 56.5mm height) and robust protection features—including thermal, voltage, current, and communication safeguards—make it ideal for demanding environments requiring reliable and responsive motion control.

Features

Dual Encoder: Provides absolute single-turn position feedback of the output shaft; retains accuracy even after power loss.
Integrated Design: Motor and MIT driver combined into a compact, high-integration unit.
Visual Debugging: Supports PC-based parameter tuning and firmware upgrades.
CAN Bus Feedback: Real-time reporting of speed, position, torque, and motor temperature via CAN interface.
Dual Temperature Protection: Ensures safe operation with two independent thermal safeguards.
Trapezoidal Motion Profile: Enables smooth acceleration and deceleration in position mode.
Multiple Control Modes: Supports MIT, speed, position, and force-position hybrid control.

Specifications

Category	Parameter	24V Version	48V Version
Electrical Specs	Rated Voltage	24V	48V
	Rated Current	2.5A	2.5A
	Peak Current	8A	8A
Motor Performance	Rated Torque	9Nm	9Nm
	Peak Torque	27Nm	27Nm
	Rated Speed	36rpm	36rpm
	Max No-load Speed	52rpm	100rpm
	Gear Ratio	16:01	16:01
Motor Properties	Pole Pairs	14	14
	Phase Inductance	360µH	360µH
	Phase Resistance	880mΩ	880mΩ
Structure & Weight	Outer Diameter	57mm	57mm
	Height	56.5mm	56.5mm
	Motor Weight	Approx. 375g	Approx. 375g
Encoder	Resolution	14-bit	14-bit
	Quantity	2	2
	Type	Magnetic encoder (single-turn absolute)	Magnetic encoder (single-turn absolute)
Communication	Control Interface	CAN @ 1Mbps	CAN @ 1Mbps
Communication	Tuning Interface	UART @ 921600bps	UART @ 921600bps
Control Modes	Supported Modes	MIT, Speed, Position, Force-Position Hybrid	MIT, Speed, Position, Force-Position Hybrid
Protection	Driver Over-temp Protection	120°C – exits enabled mode	120°C – exits enabled mode
	Motor Over-temp Protection	User-defined (≤100°C recommended)	User-defined (≤100°C recommended)
	Over-voltage Protection	User-defined (≤32V recommended)	User-defined (≤32V recommended)
	Communication Loss Protection	Exits enabled mode if no CAN command	Exits enabled mode if no CAN command
	Over-current Protection	User-defined (≤9.8A recommended)	User-defined (≤9.8A recommended)
	Under-voltage Protection	Exits enabled mode if voltage <15V	Exits enabled mode if voltage <15V

Applications

Robotic joints and collaborative arms requiring high torque and precise low-speed control
Industrial manipulators and automation systems with multi-axis coordination and real-time feedback
Mobile platforms and AGVs where compact size and thermal safety are critical
Medical and assistive robotics needing smooth motion and accurate position tracking
Research and education platforms for advanced motion control experiments and prototyping

Packing List

Item	Quantity	Description
Motor (with integrated driver)	×1	DM-J4340P-2EC brushless servo motor with built-in driver
Power & CAN Cable	×1	XT30(2+2)-F single-ended connector cable, 100mm
UART Debug Cable	×1	GH1.25 3-pin (reverse side) cable, 300mm

1. General Shipping Information

We provide premium shipping methods with a tracking number for each order.
Shipping addresses must be entered in English without special symbols to help the courier company recognize your address in the system. We will ship strictly according to the shipping address you provided. Please notify us of any address change before your order is marked "Shipped" to avoid parcel loss.
Please contact our customer service staff immediately if you need to cancel or change an order. Once your order has reached "Shipped" status, it can no longer be canceled or changed in any way. To avoid complications, please recheck your shopping cart before checkout.
We can ship all in-stock orders within 1 business day after your order has been confirmed.
All items are inspected before dispatch and are carefully hand-packed.
With standard courier practice, you need to check the contents of the parcel before signing for your goods. Otherwise, we will not be held responsible for any damage that may have occurred in transit.

🚀 Need Faster Shipping?

If you require expedited shipping (Express), please contact our customer support team at info@openelab.io for a customized quote tailored to your location.

2. Shipping Rates & Options

Our shipping rates are calculated based on the order value and destination. Please refer to the tables below for details.

2.1 Germany (Domestic)

Shipping Method	Order Value	Cost	Est. Delivery
Deutsche Post	€0 - €50.00	€4.95	2-4 Business Days
Deutsche Post	Over €50.00	Free	2-4 Business Days
DHL Paket (Faster Delivery)	€0 - €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 European Union (EU)*

*Including:

Åland Islands, Andorra, Austria, Belgium, Bosnia & Herzegovina, Bulgaria, Croatia, Czechia, Denmark, Estonia, Faroe Islands, Finland, France, Gibraltar, Greece, Guernsey, Hungary, Ireland, Isle of Man, Italy, Jersey, Latvia, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Svalbard & Jan Mayen, Sweden.*

Shipping Method	Order Value	Cost	Est. Delivery
Deutsche Post	€0 - €100.00	€7.95	5-9 Business Days
Deutsche Post	Over €100.00	Free	5-9 Business Days
DHL Paket (Faster Delivery)	€0 - €100.00	€15.95	3-7 Business Days
DHL Paket (Faster Delivery)	€100.00 - €250.00	€7.95	3-7 Business Days
DHL Paket (Faster Delivery)	Over €250.00	Free	3-7 Business Days

2.3 United States

Region	Shipping Method	Order Value	Cost	Est. Delivery
Continental U.S. (50 States)	USPS Ground Advantage	€0 - €45.00	€5.95	3-7 Business Days
	USPS Ground Advantage	Over €45.00	Free	3-7 Business Days
	USPS Priority Mail	€0 - €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 - €60.00	€6.95	5-9 Business Days
Non-Continental U.S. (AK, HI, PR, etc.)	USPS Ground Advantage	Over €60.00	Free	5-9 Business Days

* The regions in the Non-Continental U.S. include: Alaska, American Samoa, Guam, Hawaii, the Marshall Islands, the Northern Mariana Islands, Palau, Puerto Rico, the U.S. Virgin Islands, and all U.S. Armed Forces addresses. The shipping and delivery to these areas are subject to the Non-Continental U.S. shipping rules.

2.4 International (Outside EU)

For specific international destinations, including Switzerland, United Kingdom, and Norway.

Order Amount	Shipping Cost
€0 - €300.00	€19.95
Over €300.00	Free

Important Notice:

Inventory Status: Please check the inventory status on the product page. Our system displays real-time stock for our Munich and Long Beach warehouses. If an item is out of stock in these locations, it will be marked as "Pre-order". You can still place an order for these items.
Pre-order Fulfillment: For "Pre-order" items, we arrange the most efficient logistics solution to ensure you receive your goods as quickly as possible. Your package may be shipped directly from our Shenzhen warehouse. Alternatively, as part of our standard restocking process, we may transport the goods to our Munich or Long Beach warehouse first (typically taking 5-10 business days) before dispatching them to you.
Split Shipments: If your order contains both in-stock and Pre-order items, we will prioritize shipping the in-stock items from the local warehouse immediately. The remaining Pre-order items will be sent to you in a separate shipment once they are ready.

3. International Warehouse

Our products are stored in our Munich, Long Beach, and Shenzhen warehouses to provide more flexible logistics solutions tailored to different regions and customer needs. On each product's description page, we indicate the specific warehouse location to help you better plan your purchase and delivery schedule.

3.1 German Warehouse

For products stored in our warehouse in Munich, we use either Deutsche Post or DHL for shipping, depending on the size of the package. Logistics within Germany are very efficient, with an estimated delivery time of 2-4 business days, ensuring you receive your order quickly and conveniently. For Western EU countries, the estimated delivery time is 4-6 business days. For Eastern EU countries, the estimated delivery time is 6-8 business days.

3.2 US Warehouse

For products stored in our warehouse in Long Beach, we use either USPS or UPS for shipping, depending on the size of the package. Logistics within U.S. are very efficient, with an estimated delivery time of 3-7 business days, ensuring you receive your order quickly and conveniently.

3.3 Chinese Warehouse

For Pre-order items or orders fulfilled directly from our Shenzhen warehouse, we utilize YunExpress for reliable international shipping. Given the complexities of international shipping, the estimated delivery time for these packages is around 10 business days, though this may vary slightly due to customs processes or other uncontrollable factors. Otherwise, products will be restocked to our Munich or US warehouses before final delivery, as detailed in the "Important Notice" above.

4. Customs and Taxes

4.1 How are customs handled by OpenELAB for import or export?

For EU Member States: Whether shipped from Germany or China, we cover all import duties and taxes (DDP), ensuring that you receive your package without any additional costs or hassle with customs.

Important Exception for Non-EU Countries (e.g., Switzerland, Norway):
For countries outside of the European Union, such as Switzerland and Norway, you may be subject to import duties, taxes, and/or customs fees charged upon delivery. These fees vary from country to country and are the sole responsibility of the recipient.

⚠️ Refusal of Delivery: If you refuse to pay these fees upon delivery and the package is returned to us, the refund amount will be calculated after deducting the original shipping costs, return shipping costs, and any applicable customs or storage fees.

4.2 How is VAT charged when the Customer places an order from OpenELAB?

In accordance with the newest VAT e-commerce rules in the EU, OpenELAB shall have the right to charge the amount of VAT at checkout. The standard rate of actual VAT applied is subject to the destination country's regulations. No additional VAT will be charged upon delivery for these orders.

DAMIAO J4340P-2EC Brushless Servo Joint Motor MIT Driver Dual Encoder

DAMIAO J4340P-2EC Brushless Servo Joint Motor MIT Driver Dual Encoder

Features

Specifications

Applications

Packing List

1. General Shipping Information