CubeMars AKH70-48 V1.0 KV41

The AKH70-48 is the high-reduction version of the hollow-shaft planetary actuator module. It gets more torque out of the same body, and the cables still run through the shaft.

Key features

• Hollow shaft. Power, communication and sensor cables pass straight through the 7 mm bore inside the actuator, so there is no cable clutter at the joint.
• Dual 21-bit magnetic encoders. Separate readings on the motor side and at the output shaft improve closed-loop control accuracy.
• Position kept through power loss. The output position is remembered, so re-homing is needed less often.
• Daisy-chain connection. A dual connection interface lets several actuators be chained, making multi-axis setups easier.
• Servo and MIT control modes. Position, speed and acceleration parameters can be controlled together.
• Adaptive PID. Less manual tuning and faster commissioning.
• XT30PW connector and UART interface. Power and CAN communication share one connection, and parameters are set from a computer.
• Built-in protection. Overcurrent, overvoltage, undervoltage and overtemperature protection are inside the housing.

Applications

Typical applications include humanoid robots, collaborative robots, multi-axis robot arms, automation equipment, AGV and AMR platforms and compact robot designs that need internal wiring.

Is it enough for your project?

The AKH70-48 delivers 74 Nm continuous and 222 Nm peak torque. For example, a 12 kg load at the end of a 50 cm arm needs about 58.9 Nm of static torque (12 × 9.81 × 0.50). That load stays within the actuator's rated torque.

The trade-off is speed. Because of the 48:1 reduction, no-load speed is 35 rpm, or about 210 degrees per second. A 90 degree turn takes at least 0.43 seconds without load. It suits joints that carry a lot of weight but do not swing fast, such as the shoulder, hip and waist. Cables running through the 7 mm bore also make cable management easier in multi-axis arms.

How it compares to similar models

• AKH70-16 KV41. The 16:1 model in the same family. It gives 26 Nm rated torque but is three times faster (105 rpm) and weighs 879 g.
• AK80-64 KV80. A lower class with 48 Nm rated and 120 Nm peak torque, and lighter at 850 g. It has no hollow shaft.
• AKE90-8 KV35. Much faster with 55 Nm rated torque and 210 rpm, but it has no driver board and needs an external driver.

Frequently asked questions

Can it be turned by hand?

Not easily. Backdrive torque is about 2.22 Nm, and because of the high reduction the joint largely holds its position when unpowered.

How much gearbox backlash is there?

According to the manufacturer, 12 arcminutes, or about 0.2 degrees.

Which encoders does it use?

Two 21-bit magnetic encoders, one on the motor side and one at the output shaft. The output position is kept when power is cut.

How are several actuators connected?

Thanks to the dual connection interface, actuators can be daisy-chained. Power and CAN communication share the XT30PW connector, and parameters are set over UART.

In the box

• AKH70-48 V1.0 KV41 hollow-shaft actuator module with integrated driver
• Power and CAN communication cable
• Serial communication cable
• Certificate of conformity

Related products

To complete your setup, see the R-Link V3.0 programming interface and the Wiring Package V3.0 cable set.

Products in stock are dispatched within 3 business days from our warehouse in Turkey.

Shipping cost and delivery time to your country are shown at checkout. For models not listed in stock, ask our technical team about the lead time.

To start a return, contact us through our technical team. The product must be unused, undamaged and in its original packaging.

Return conditions for international shipments are confirmed before purchase.