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Leaderdrive

Leaderdrive KAH Motor | Robot Actuator Motor for Precision Robotics

  • Leaderdrive motor platform for precision robotics and automation systems.
  • Designed for robotic joints, motion modules, and compact actuator assemblies.
  • Suitable for robot hardware development, research labs, and industrial automation.
$2,900
Version
Model No
Reduction Ratio

Warranty
  • 1-year limited warranty for the main unit.
  • 6-month limited warranty for the battery.
  • For service support, please contact customer care with proof of purchase.

Shipping

• Free shipping on qualifying orders. Eligibility and exact rates are calculated at checkout.
• Typical delivery 9 – 15 business days.
• Need it faster or shipping something large? Contact us for expedited options and a freight quote.

Developer Support

Leaderdrive KAH Motor product overview, specifications, and application reference manual ▶ Leaderdrive KAH Motor 3D CAD model for mechanical design and integration ▶

Leaderdrive KAH Motor

The Leaderdrive KAH Motor is a Leaderdrive motor for robotic joints, precision motion systems, automation equipment, and robot hardware development. It is suitable for engineering teams, robotics developers, research labs, and automation builders integrating compact motion modules.

Features

  • **Precision motion platform:** Designed for robotic joints and automation hardware.
  • **Developer-focused integration:** Suitable for robot actuator modules and engineering prototypes.
  • **Robotics applications:** Built for research, automation, and compact motion systems.
  • **Source-backed listing:** Product data is extracted from the reference product page.
▤ Technical Specifications ⌃
KAH14 and KAH17 Series Parameter Table
Series KAH-14 KAH-17
Mode: KAH- 14A 14B 14C 17A 17B 17C 17D
Reduction ratio 1:51 1:81 1:101 1:51 1:81 1:101 1:121
Maximum torque at start and stop N·m 23 29 34 42 53 66 66
Maximum average torque N·m 8.6 13.5 13.5 32 33 49 49
220VAC Maximum speed Rated speed Maximum current Rated current Torque constant RPM RPM Arms Arms N m/Arms 127.5 70.6 1.96 0.56 15.36 80.2 44.4 1.56 0.56 24.10 64.4 35.6 1.41 0.44 30.68 119.6 60.8 3.35 1.65 19.39 75.3 38.3 2.10 1.04 31.73 60.4 30.7 2.51 1.24 39.51 50.4 25.6 2.09 1.04 47.11
Phase resistance Phase inductance Back EMF Ohms mH Vrms/kRPM 4.311 5.256 23.85 2.135 3.869 30.66
110VAC Maximum speed Rated speed Maximum current Rated current Torque constant RPM RPM Arms Arms N m/Arms 40.8 70.6 4.06 1.17 7.36 64.8 44.4 3.23 1.16 11.68 80.8 35.6 3.03 0.93 14.57 100.0 60.8 6.78 3.35 9.56 63.0 38.3 8.26 4.18 7.85 50.5 30.7 7.08 3.53 13.87 42.1 25.6 6.26 2.95 16.58
Phase resistance Phase inductance Back EMF Ohms mH Vrms/kRPM 2.089 2.593 11.07 1.036 1.684 14.79
DC bus voltage 48VDC Maximum speed Rated speed Maximum current Rated current Torque constant RPM RPM Arms Arms N m/Arms 88.2 70.6 7.59 2.84 3.03 55.6 44.4 7.67 3.57 3.78 44.6 35.6 5.66 2.25 6.01 78.4 60.8 16.50 8.47 3.74 49.4 38.3 11.23 5.34 6.12 39.6 30.7 13.20 6.53 7.50 33.1 25.6 10.98 5.46 8.98
Phase resistance Phase inductance Back EMF Ohms mH Vrms/kRPM 0.275 0.352 6.32 0.262 0.313 7.98
Absolute Encoder Encoder type Resolution (single motor revolution) Motor Multi-turn counter Multi-turn hollow shaft absolute encoder 219 (524,288), 222 (4,194,304) or 224 (16,777,216) 216 (65,536)
Incremental encoder Resolution Hollow shaft incremental encoder, 40000 pulse/rev (multiplied by 4)
Output shaft resolution pulse/rev 2040000 3240000 4040000 2040000 3240000 4040000 4840000
Uni-directional positional accuracy Arc sec 40 30 30 40 30 30 30
Repeatability of positioning accuracy Arc sec 8 7 7 8 7 7 7
Overturning stiffness x104 N·m /rad 7.05 9.8 22.08 25.8
Torsional stiffness x104 N·m /rad 0.46 0.6 1.07 1.3
Inertia moment Without brake With brake kg m2 kg m2 0.09 0.11 0.19 0.22 0.28 0.31 0.15 0.17 0.41 0.45 0.51 0.56 1.16 1.28
Mass Without brake With brake kg kg 1.3 1.5 1.8 2.0
Number of motor poles 16
Motor insulation Heat-resistant class: F(155℃) Insulation resistance: more than 200MΩ(DC500V) Dielectric strength: AC1500V (1 minute)
Protection structure (Degrees of Protection) Totally enclosed self-cooled type (default: IP65, special customized: IP67)
KAH20 and KAH25 Series Parameter Table
Series KAH-20 KAH-25
Mode: KAH- 20A 20B 20C 20D 20E 25A 25B 25C 25D 25E
Reduction ratio 1:51 1:81 1:101 1:121 1:161 1:51 1:81 1:101 1:121 1:161
Maximum torque at start and stop N·m 69 91 102 108 113 121 169 194 207 217
Maximum average torque N·m 42 58 61 61 61 68.5 107 133 133 133
220VAC Maximum speed Rated speed Maximum current Rated current Torque constant RPM RPM Arms Arms N m/Arms 119.6 60.8 4.53 2.12 19.81 75.3 38.3 3.89 1.85 31.35 60.4 30.7 3.41 1.56 39.10 50.4 25.6 2.78 1.30 46.92 37.9 19.3 2.21 0.98 62.24 102.0 58.8 8.05 3.38 20.28 64.2 37.0 7.08 3.32 32.21 51.5 29.7 6.52 3.31 40.16 43.0 24.8 5.81 2.76 48.11 32.3 18.6 4.58 2.08 64.02
Phase resistance Phase inductance Back EMF Ohms mH Vrms/kRPM 2.135 3.869 30.66 1.779 3.375 40.84
110VAC Maximum speed Rated speed Maximum current Rated current Torque constant RPM RPM Arms Arms N m/Arms 100.0 60.8 9.49 4.28 9.82 63.0 38.3 7.87 3.72 15.61 50.5 30.7 7.08 3.14 19.45 42.1 25.6 6.25 2.62 23.32 31.7 19.3 4.91 1.97 31.04 80.4 54.9 13.57 5.69 12.04 50.6 34.6 11.93 5.60 19.12 40.6 27.7 10.99 5.58 23.84 33.9 23.1 9.78 4.66 28.56 25.5 17.4 7.71 3.52 38.00
Phase resistance Phase inductance Back EMF Ohms mH Vrms/kRPM 1.036 1.684 14.79 0.809 1.534 18.56
DC bus voltage 48VDC Maximum speed Rated speed Maximum current Rated current Torque constant RPM RPM Arms Arms N m/Arms 78.4 60.8 17.89 10.88 3.86 49.4 38.3 18.86 12.03 4.82 39.6 30.7 13.33 7.97 7.65 33.1 25.6 11.79 6.66 9.16 24.8 19.3 9.27 5.03 12.19 60.8 51.0 28.61 16.19 4.23 38.3 32.1 32.01 20.27 5.28 30.7 25.7 23.15 15.87 8.38 25.6 21.5 20.62 13.25 10.04 19.3 16.2 16.24 9.96 13.36
Phase resistance Phase inductance Back EMF Ohms mH Vrms/kRPM 0.262 0. 313 7.98 0.239 0.282 10.57
Absolute Encoder Encoder type Resolution (single motor revolution) Motor Multi-turn counter Multi-turn hollow shaft absolute encoder 219 (524,288), 222 (4,194,304) or 224 (16,777,216) 216 (65,536)
Incremental encoder Resolution Hollow shaft incremental encoder, 40000 pulse/rev (multiplied by 4)
Output shaft resolution pulse/rev 2040000 3240000 4040000 4840000 6440000 2040000 3240000 4040000 4840000 6440000
Uni-directional positional accuracy Arc sec 40 30 30 30 30 40 30 30 30 30
Repeatability of positioning accuracy Arc sec 8 7 7 7 7 8 7 7 7 7
Overturning stiffness x104 N·m /rad 23.5 27.3 34.7 42.8
Torsional stiffness x104 N·m /rad 1.8 2.3 3.4 4.6
Inertia moment Without brake With brake kg m2 kg m2 0.19 0.22 0.57 0.63 0.86 0.95 1.23 1.35 2.18 2.35 0.49 0.58 1.24 1.51 1.93 2.31 2.85 3.31 5.01 5.97
Mass Without brake With brake kg kg 2.2 2.5 3.2 3.6
Number of motor poles 16
Motor insulation Heat-resistant class: F(155℃) Insulation resistance: more than 200MΩ(DC500V) Dielectric strength: AC1500V (1 minute)
Protection structure (Degrees of Protection) Totally enclosed self-cooled type (default: IP65, special customized: IP67)
KAH32 and KAH40 Series Parameter Table
Series KAH-32 KAH-40
Mode: KAH- 32A 32B 32C 32D 32E 40A 40B 40C 40D 40E
Reduction ratio 1:51 1:81 1:101 1:121 1:161 1:51 1:81 1:101 1:121 1:161
Maximum torque at start and stop N·m 267 376 411 436 459 497 641 702 762 800
Maximum average torque N·m 133 206 267 267 267 242 351 460 557 557
220VAC Maximum speed Rated speed Maximum current Rated current Torque constant RPM RPM Arms Arms N m/Arms 88.2 51.0 14.37 5.96 22.30 55.6 32.1 12.74 5.82 35.42 44.6 25.7 11.17 6.04 44.17 37.2 21.5 9.89 5.05 52.92 28.0 16.1 7.82 3.79 70.41 76.5 43.1 22.79 8.67 27.91 48.1 27.2 18.51 7.92 44.32 38.6 21.8 16.26 8.32 55.26 32.2 18.2 14.73 8.41 66.23 24.2 13.7 11.62 6.32 88.09
Phase resistance Phase inductance Back EMF Ohms mH Vrms/kRPM 1.438 3.165 44.29 1.024 3.026 50.87
110VAC Maximum speed Rated speed Maximum current Rated current Torque constant RPM RPM Arms Arms N m/Arms 68.6 45.1 25.29 10.50 12.67 43.2 28.4 22.42 10.24 20.12 34.7 22.8 19.66 10.64 25.09 28.9 19.0 17.41 8.88 30.06 21.7 14.3 13.77 6.68 39.99 52.9 35.3 35.85 14.55 16.63 33.3 22.2 29.12 13.29 26.41 26.7 17.8 25.58 13.97 32.93 22.3 14.9 23.17 14.11 39.47 16.8 11.2 18.29 10.61 52.50
Phase resistance Phase inductance Back EMF Ohms mH Vrms/kRPM 0.730 1.408 22.51 0.530 1.207 44.96
DC bus voltage 48VDC Maximum speed Rated speed Maximum current Rated current Torque constant RPM RPM Arms Arms N m/Arms 51.00 41.20 51.25 25.53 5.21 32.10 25.90 57.94 31.74 6.49 25.70 20.80 39.83 25.87 10.32 21.50 17.40 35.33 21.64 12.34 16.10 13.00 27.95 16.26 16.42 35.30 29.40 72.66 35.38 6.84 22.20 18.50 75.06 41.10 8.54 17.80 14.90 51.81 33.95 13.55 14.90 12.40 46.98 34.34 16.22 11.20 9.30 37.05 25.80 21.59
Phase resistance Phase inductance Back EMF Ohms mH Vrms/kRPM 0.188 0. 265 12.05 0.139 0.207 17.48
Absolute Encoder Encoder type Resolution (single motor revolution) Motor Multi-turn counter Multi-turn hollow shaft absolute encoder 219 (524,288), 222 (4,194,304) or 224 (16,777,216) 216 (65,536)
Incremental encoder Resolution Hollow shaft incremental encoder, 40000 pulse/rev (multiplied by 4)
Output shaft resolution pulse/rev 2040000 3240000 4040000 4840000 6440000 2040000 3240000 4040000 4840000 6440000
Uni-directional positional accuracy Arc sec 40 30 30 30 30 40 30 30 30 30
Repeatability of positioning accuracy Arc sec 8 7 7 7 7 8 7 7 7 7
Overturning stiffness x104 N·m /rad 87.5 113.6 149.5 187.4
Torsional stiffness x104 N·m /rad 7.6 9.9 14 18.6
Inertia moment Without brake With brake kg m2 kg m2 1.72 2.03 4.34 5.29 6.76 8.09 9.98 11.59 17.54 20.90 3.91 4.62 9.86 12.03 15.36 18.39 22.68 26.35 39.86 47.50
Mass Without brake With brake kg kg 6.2 6.7 9.1 9.7
Number of motor poles 16
Motor insulation Heat-resistant class: F(155℃) Insulation resistance: more than 200MΩ(DC500V) Dielectric strength: AC1500V (1 minute)
Protection structure (Degrees of Protection) Totally enclosed self-cooled type (default: IP65, special customized: IP67)

Frequently Asked Questions

Where do you ship from?

Robotopian operates fulfillment capabilities in Shenzhen, China and Santa Clara, California. Depending on the product, inventory condition, production arrangement, and destination, orders may ship from different locations.

At this time, most newly manufactured robot orders ship primarily from Shenzhen, China. Selected inventory may also ship from Santa Clara when available.

Why are many orders shipped from China?

Most robotic products today still rely heavily on China-based supply chains. Many models enter sourcing, production scheduling, or manufacturing only after an order is placed.

By working directly with the China supply chain and our Shenzhen fulfillment system, Robotopian can coordinate procurement, warehouse handling, international transportation, and cross-border delivery more efficiently. In many cases, this also helps us provide a clearer cost structure and a more competitive fulfillment model.

In other words, shipping directly from China does not necessarily make the process more complicated. In many cases, it is actually a more direct and efficient way to fulfill specialized robotics orders.

Which countries do you ship to?

Robotopian ships to a broad range of major countries and regions worldwide. Actual destination availability may vary depending on the product type, local import regulations, shipping conditions, and fulfillment feasibility.

Common destinations may include, but are not limited to:

United States

Canada

United Kingdom

Germany

France

Netherlands

Australia

New Zealand

Singapore

Japan

If your country or region is not shown at checkout, please contact the Robotopian team and we will evaluate a suitable shipping option for you.

Does your pricing include duties, taxes, and shipping costs?

Where applicable, Robotopian aims to include standard cross-border fulfillment costs in the quoted order total and to make the major cost components clear before checkout.

This may include:
product price
international shipping
standard customs clearance handling
applicable import duties and taxes
last-mile delivery
standard residential or remote-area surcharges
applicable special transportation surcharges

Why was my order split into multiple packages?

In some cases, one order may be split into multiple parcels or shipped from different fulfillment locations.

This may happen because:
the main unit and accessories become ready at different times
different items are fulfilled from different warehouses
some items are ready earlier and can ship first
different products require different shipping arrangements

If split shipment occurs, Robotopian will make reasonable efforts to share the relevant shipping information.

Do I need to handle customs clearance myself?

In most cases, no.

For standard cross-border orders, Robotopian will usually coordinate shipping, customs, and delivery arrangements to reduce complexity for the customer.

In some cases, local customs authorities, delivery agents, or carriers may contact the recipient directly to verify delivery information, recipient identity, or local clearance requirements. If that happens, you may contact the Robotopian team and we will assist.

What should I do if I am asked to pay an extra charge?

If you are asked to pay a charge that you believe should already have been included in your quoted order total, please contact the Robotopian team promptly.

We will review the quotation, payment record, shipping arrangement, and actual situation. If the charge is confirmed to fall within the covered standard scope, Robotopian will assist in resolving the issue.

What should I do if my package is lost, damaged, or shows a delivery exception?

If your order experiences any of the following:

lost package
obvious package damage
delivery exception
delivery status inconsistent with the actual receipt of goods

please contact the Robotopian team within 72 hours. We will assist, based on the actual case, in following up with the carrier, customs intermediary, or related service providers.

Do you offer additional shipping insurance or shipment protection?

For certain eligible orders, Robotopian may be able to provide additional shipping protection or commercial insurance options upon request.

Because eligibility depends on the product, destination, and shipping method, availability, structure, and pricing will need to be confirmed case by case.

Do you offer appointment delivery, installation, or special delivery services?

For certain eligible orders, Robotopian may offer additional services such as:

appointment-based delivery
special delivery arrangements
on-site installation
deployment support
other project-based customized fulfillment services

These services are generally not included in standard delivery. If needed, please contact the Robotopian team in advance to confirm feasibility and pricing.

Is the order considered delivered once it is signed for?

Generally, yes. Once a shipment has been signed for, it is usually considered delivered.

If you discover a delivery issue, missing goods, or another shipping-related problem after receipt, please contact the Robotopian team within 72 hours so we can assist promptly.

How long will it take before my order ships?

That depends on the type of product you ordered.

In-stock items: usually move into warehouse processing and dispatch shortly after payment is confirmed.

Pre-order items: dispatch timing depends on the brand’s supply schedule and incoming availability.

Made-to-order / production-scheduled items: these typically go through sourcing, production, or scheduling first. From confirmed payment to the point when the order is ready for dispatch from Shenzhen, the estimated lead time is usually 10–30 days.

For U.S. orders that have completed preparation and shipped from Shenzhen, the estimated transit time is typically 3–7 business days. Delivery timing for other destinations will vary.

Why hasn’t my tracking updated right after shipment?

This is common in international shipping.

After an order is packed and assigned for shipment, tracking may not update immediately until the parcel is scanned by the first carrier, handed through the airport process, or entered into the destination country’s local carrier network.

If your tracking does not change during the first few days after shipment, that is usually normal and does not necessarily mean the parcel is not moving.

Will I receive a tracking number after shipment?

Yes. Once the order is officially dispatched from Shenzhen or the applicable fulfillment location, Robotopian will provide a tracking number so you can follow the shipment progress.

Depending on the shipping route, some orders may show limited tracking information during the early stages of international transit. Tracking details usually become more complete as the shipment moves through later carrier networks.

Can I cancel my order?

Yes, but the rules depend on the order stage.

Orders may be cancelled free of charge within 24 hours of placement.

If the order has already entered sourcing, production, scheduling, or manufacturing, Robotopian will refund 60% of the amount paid and retain 40% as a cancellation fee. This helps cover supplier deposits, scheduling allocation, and related processing costs.

Whether the order has entered one of these stages will be determined based on Robotopian’s internal system records and supply chain confirmation.

Can I change my shipping address?

Yes, but please contact us as early as possible.

You may request an address change before the order is officially dispatched. If the order has already shipped, additional charges caused by rerouting, address changes, or shipment interception may apply and will generally be the customer’s responsibility.

What happens if I refuse delivery?

If an order has already shipped and the customer refuses delivery, the parcel will usually be returned. Any return shipping charges, return handling fees, and other incurred costs will generally be the responsibility of the customer.

If you have concerns about the order, it is best to contact the Robotopian team before the shipment is dispatched.

  • Or send us a message

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