RPX40 Brushless DC Servo Motor
RapidPower™ Xtreme Series

Summary Details

Size: 41 mm (1.614 in)
Peak Torque: to 991 mNm (140 oz.in)

High torque density. Excellent torque per frame size performance.

New from ElectroCraft, the RPX40 is a highly dynamic and controllable very small frame metric motor. With an advanced 14-pole encapsulated core, this compact DC motor offers high torque density at a very affordable price. The RPX40 is available in 12V, 24V and 48V versions and like all ElectroCraft motors is fully customizable. This versatile motor is highly energy efficient and ideal for embedded applications.

All versions of the RPX40 include hall sensor feedback and can be configured with an optional encoder (differential, optical encoder with up to 2048 lines).

Additional Product Details

RPX40 Outline Drawing

Technical Drawings

RPX40 Performance Curves

Chart Chart Chart Chart: RPX Series Stall Torque at elevated Ambient Temperatures

RPX40 Mechanical / Winding Data

Stack Size Models RPX40-125 RPX40-250 RPX40-325
Rated Speed (rpm) 4775 4075 2950
No-Load Speed (rpm) 6230 4930 3590
Continuous Stall Torque* (mNm) 125 250 325
Continuous Stall Torque* (oz-in) 18.8 36.1 46.8
Peak Torque (mNm) 398 765 991
Peak Torque (oz-in) 56 108 140
Motor Constant (mNm / √ Watt) 31.6 54.2 69.2
Motor Constant (oz-in / √ Watt) 4.5 7.7 9.8
Electrical Time Constant (msec) 0.33 0.40 0.45
Mechanical Time Constant (msec) 1.11 0.51 0.19
Thermal Time Constant (msec) 430 455 480
Rotor Inertia (g-cm2) 7 15 30
Rotor Inertia (oz-in2) 0.0383 0.0820 0.1640
Thermal Resistance (C / Watts)
With Heatsink
4.77 4.02 3.69
Max Axial Load (N) 7 (5mm from face)
Max Radial Load (N) 30 (5mm from face)
Weight (g) 160 240 370
Weight (oz) 5.60 8.40 12.95
Length (inches) 1.2 1.6 2.3
Length (mm) 29.4 39.4 59.4
Number of Poles 14 14 14
Notes: * Continuous rating based on a 25°C ambient temperature, winding temperature rise of 100°C. Mounted on a 150 X 150 X 6 mm aluminum heat sink.

Winding Models 125V12 125V24 125V48 250V12 250V24 250V48 325V12 325V24 325V48
Design Voltage
(VDC)
12 24 48 12 24 48 12 24 48
Cont. Stall Current
(Amps)
6.6 3.3 1.6 10.9 5.5 2.7 10.3 5.2 2.6
Peak Current
(Amps)
19.7 9.8 4.9 32.8 16.4 8.2 31.0 15.5 7.7
Operating Temperature
(C)
-40 to 150
Voltage Constant
±10%
(V/rad/sec)
0.019 0.038 0.076 0.023 0.046 0.092 0.029 0.057 0.114
Voltage Constant
±10%
(VDC/kRPM)
2.0 4.0 8.0 2.4 4.8 9.6 3.0 6.0 12.0
Torque Constant
±10%
(mNm / Amp)
19.1 38.1 76.3 22.9 45.8 91.5 31.5 63.9 126.8
Torque Constant
±10%
(oz-in / Amp)
2.7 5.4 10.8 3.2 6.5 13.0 4.5 9.0 18.0
Resistance
±10%
(Ohms)
0.36 1.45 5.83 0.37 0.81 2.30 0.17 0.68 2.74
Inductance
±10%
(mH)
0.118 0.474 1.890 0.074 0.341 1.360 0.077 0.309 1.230

RPX40 Connection

hall diagram

RPX40 CAD

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ElectroCraft Rapid Delivery Program

Some versions of this product are available via ElectroCraft's Rapid Delivery Program. Lead times for these products are given in working days and stated below. Please note, these lead times may be exceeded during holiday periods or due to unforeseen circumstances. Always contact your local ElectroCraft representative for confirmation of availability.

Rapid delivery products are stocked in locations all over the World. If the product you require is not stocked in your region, you may request accelerated delivery from other areas. Please consult your local representative for more information.

Customers are responsible for all freight charges.

Rapid Delivery to:

Select the region where the product would be delivered to.

The Americas

Part Number Description Typical Lead Time
RPX40-125V24-100-S 2 days
RPX40-250V24-100-S 2 days
RPX40-325V24-100-S 2 days

Europe, the Middle East and Africa

Part Number Description Typical Lead Time
No products available

Asia

Part Number Description Typical Lead Time
RPX40-125V24-100-S 2 days
RPX40-250V24-100-S 2 days
RPX40-325V24-100-S 2 days