LRPX40 Brushless DC Planetary Gear Motor
Low Noise RapidPower™ Xtreme Series

Summary Details

Size: 41mm (1.614 in)
Peak Torque: to 22.5 Nm (3,186 oz.in)
Continuous Stall Torque: to 15.0 Nm (2124 oz.in)
Speed: to 1213 RPM

Exquisitely efficient small form factor BLDC motor that has peak operating efficiency at low RPM allowing custom integration with planetary gearbox. High torque from a small form factor, with low power consumption and peak performance at low RPM for quiet operation.

Traditional BLDC motors have peak performance at high RPMs. These RPMs are simply too high to make efficient use of a gearbox, and even when a traditional bldc motor is paired with a custom high-rpm gearbox there are typically noise and heat issues that make it prohibitive for discerning applications.

The LRPX carefully integrates the unique low RPM RPX with a custom planetary gearbox. The result is a small form factor bldc motor that can produce high torque at low RPM and offer strong smooth operation with low noise!

Additional Product Details

LRPX40 Outline Drawing

Technical Drawings

LRPX40 Speed / Torque Curves

LRPX40 Speed Torque Performance - 1 Stage LRPX40 Speed Torque Performance - 2 Stage LRPX40 Speed Torque Performance - 3 Stage LRPX40 Speed Torque Performance - 4 Stage

LRPX40 Mechanical / Winding Data

Winding Specifications

Part Number Voltage Resis-
tance
Induc-
tance
Number
of Poles
Torque Constant Voltage Constant Continuous Running Peak
Units Volts Ohms mH Nm/A oz-in/A V-sec/
rad
V/kRPM Torque
(Nm)
RPM Current
(A)
Torque
(Nm)
RPM Current
(A)

Motor Only

LRPX40-250V12 12 0.26 27.8 14 0.023 3.24 0.023 2.40 0.16 4075 6.8 0.76 725 33.3
LRPX40-250V24 24 1.1 125.4 14 0.046 6.49 0.046 4.80 0.16 4075 3.4 0.76 725 16.7
LRPX40-250V48 48 4.5 501.4 14 0.092 12.96 0.092 9.60 0.16 4075 1.7 0.76 725 8.3

One Stage Gearbox

LRPX40-250V12-___-_003 12 0.26 27.8 14 0.069 9.81 0.077 8.06 0.47 1213 6.8 2.31 216 33.3
LRPX40-250V24-___-_003 24 1.1 125.4 14 0.138 19.61 0.154 16.13 0.47 1213 3.4 2.31 216 16.7
LRPX40-250V48-___-_003 48 4.5 501.4 14 0.277 39.18 0.308 32.26 0.47 1213 1.7 2.31 216 8.3
LRPX40-250V12-___-_004 12 0.26 27.8 14 0.085 11.98 0.094 9.85 0.57 993 6.8 2.82 177 33.3
LRPX40-250V24-___-_004 24 1.1 125.4 14 0.169 23.96 0.188 19.71 0.57 993 3.4 2.82 177 16.7
LRPX40-250V48-___-_004 48 4.5 501.4 14 0.338 47.87 0.376 39.41 0.57 993 1.7 2.82 177 8.3
LRPX40-250V12-___-_006 12 0.26 27.8 14 0.114 16.16 0.127 13.29 0.77 736 6.8 3.80 131 33.3
LRPX40-250V24-___-_006 24 1.1 125.4 14 0.228 32.33 0.254 26.58 0.77 736 3.4 3.80 131 16.7
LRPX40-250V48-___-_006 48 4.5 501.4 14 0.456 64.59 0.508 53.17 0.77 736 1.7 3.80 131 8.3

Two Stage Gearbox

LRPX40-250V12-___-_011 12 0.26 27.8 14 0.209 29.65 0.259 27.10 0.91 361 4.4 6.97 64 33.3
LRPX40-250V24-___-_011 24 1.1 125.4 14 0.419 59.31 0.517 54.19 0.91 361 2.2 6.97 64 16.7
LRPX40-250V48-___-_011 48 4.5 501.4 14 0.837 118.49 1.035 108.38 0.91 361 1.1 6.97 64 8.3
LRPX40-250V12-___-_014 12 0.26 27.8 14 0.256 36.23 0.316 33.10 1.12 295 4.4 8.52 53 33.3
LRPX40-250V24-___-_014 24 1.1 125.4 14 0.512 72.47 0.632 66.21 1.12 295 2.2 8.52 53 16.7
LRPX40-250V48-___-_014 48 4.5 501.4 14 1.022 144.77 1.265 132.42 1.12 295 1.1 8.52 53 8.3
LRPX40-250V12-___-_017 12 0.26 27.8 14 0.313 44.27 0.386 40.45 1.36 242 4.4 10.41 43 33.3
LRPX40-250V24-___-_017 24 1.1 125.4 14 0.625 88.54 0.772 80.90 1.36 242 2.2 10.41 43 16.7
LRPX40-250V48-___-_017 48 4.5 501.4 14 1.249 176.88 1.545 161.79 1.36 242 1.1 10.41 43 8.3
LRPX40-250V12-___-_019 12 0.26 27.8 14 0.345 48.88 0.426 44.66 1.51 219 4.4 11.30 39 32.7
LRPX40-250V24-___-_019 24 1.1 125.4 14 0.690 97.76 0.853 89.32 1.51 219 2.2 11.30 39 16.4
LRPX40-250V48-___-_019 48 4.5 501.4 14 1.379 195.31 1.706 178.65 1.51 219 1.1 11.30 39 8.2
LRPX40-250V12-___-_023 12 0.26 27.8 14 0.422 59.72 0.521 54.57 1.84 179 4.4 11.30 32 26.8
LRPX40-250V24-___-_023 24 1.1 125.4 14 0.843 119.45 1.042 109.14 1.84 179 2.2 11.30 32 13.4
LRPX40-250V48-___-_023 48 4.5 501.4 14 1.685 238.64 2.084 218.27 1.84 179 1.1 11.30 32 6.7
LRPX40-250V12-___-_031 12 0.26 27.8 14 0.569 80.57 0.703 73.62 2.48 133 4.4 11.30 24 19.9
LRPX40-250V24-___-_031 24 1.1 125.4 14 1.138 161.15 1.406 147.24 2.48 133 2.2 11.30 24 9.9
LRPX40-250V48-___-_031 48 4.5 501.4 14 2.273 321.95 2.812 294.48 2.48 133 1.1 11.30 24 5.0

Three Stage Gearbox

LRPX40-250V12-___-_038 12 0.26 27.8 14 0.633 89.68 0.869 91.04 1.74 107 2.8 20.16 19 31.8
LRPX40-250V24-___-_038 24 1.1 125.4 14 1.267 179.35 1.739 182.08 1.74 107 1.4 20.16 19 15.9
LRPX40-250V48-___-_038 48 4.5 501.4 14 2.530 358.32 3.477 364.16 1.74 107 0.7 20.16 19 8.0
LRPX40-250V12-___-_046 12 0.26 27.8 14 0.774 109.57 1.062 111.23 2.13 88 2.8 22.50 16 29.1
LRPX40-250V24-___-_046 24 1.1 125.4 14 1.547 219.13 2.124 222.46 2.13 88 1.4 22.50 16 14.5
LRPX40-250V48-___-_046 48 4.5 501.4 14 3.091 437.79 4.249 444.93 2.13 88 0.7 22.50 16 7.3
LRPX40-250V12-___-_057 12 0.26 27.8 14 0.945 133.87 1.298 135.90 2.60 72 2.8 22.50 13 23.8
LRPX40-250V24-___-_057 24 1.1 125.4 14 1.891 267.74 2.596 271.81 2.60 72 1.4 22.50 13 11.9
LRPX40-250V48-___-_057 48 4.5 501.4 14 3.777 534.90 5.191 543.62 2.60 72 0.7 22.50 13 6.0
LRPX40-250V12-___-_063 12 0.26 27.8 14 1.044 147.82 1.433 150.06 2.87 65 2.8 22.50 12 21.6
LRPX40-250V24-___-_063 24 1.1 125.4 14 2.088 295.64 2.866 300.13 2.87 65 1.4 22.50 12 10.8
LRPX40-250V48-___-_063 48 4.5 501.4 14 4.171 590.63 5.732 600.26 2.87 65 0.7 22.50 12 5.4
LRPX40-250V12-___-_069 12 0.26 27.8 14 1.155 163.56 1.586 166.05 3.18 59 2.8 22.50 10 19.5
LRPX40-250V24-___-_069 24 1.1 125.4 14 2.310 327.13 3.171 332.10 3.18 59 1.4 22.50 10 9.7
LRPX40-250V48-___-_069 48 4.5 501.4 14 4.615 653.54 6.343 664.19 3.18 59 0.7 22.50 10 4.9
LRPX40-250V12-___-_076 12 0.26 27.8 14 1.275 180.61 1.751 183.35 3.51 53 2.8 22.50 9 17.6
LRPX40-250V24-___-_076 24 1.1 125.4 14 2.551 361.21 3.502 366.70 3.51 53 1.4 22.50 9 8.8
LRPX40-250V48-___-_076 48 4.5 501.4 14 5.096 721.63 7.003 733.40 3.51 53 0.7 22.50 9 4.4
LRPX40-250V12-___-_093 12 0.26 27.8 14 1.558 220.66 2.139 224.02 4.29 44 2.8 22.50 8 14.4
LRPX40-250V24-___-_093 24 1.1 125.4 14 3.116 441.33 4.278 448.04 4.29 44 1.4 22.50 8 7.2
LRPX40-250V48-___-_093 48 4.5 501.4 14 6.226 881.70 8.557 896.07 4.29 44 0.7 22.50 8 3.6
LRPX40-250V12-___-_103 12 0.26 27.8 14 1.721 243.66 2.362 247.36 4.74 40 2.8 22.50 7 13.1
LRPX40-250V24-___-_103 24 1.1 125.4 14 3.441 487.31 4.724 494.72 4.74 40 1.4 22.50 7 6.5
LRPX40-250V48-___-_103 48 4.5 501.4 14 6.875 973.57 9.448 989.44 4.74 40 0.7 22.50 7 3.3
LRPX40-250V12-___-_126 12 0.26 27.8 14 2.102 297.70 2.886 302.23 5.79 32 2.8 22.50 6 10.7
LRPX40-250V24-___-_126 24 1.1 125.4 14 4.204 595.40 5.772 604.45 5.79 32 1.4 22.50 6 5.4
LRPX40-250V48-___-_126 48 4.5 501.4 14 8.400 1189.51 11.544 1208.90 5.79 32 0.7 22.50 6 2.7
LRPX40-250V12-___-_170 12 0.26 27.8 14 2.836 401.63 3.894 407.74 7.81 24 2.8 22.50 4 7.9
LRPX40-250V24-___-_170 24 1.1 125.4 14 5.672 803.27 7.787 815.47 7.81 24 1.4 22.50 4 4.0
LRPX40-250V48-___-_170 48 4.5 501.4 14 11.332 1604.78 15.574 1630.94 7.81 24 0.7 22.50 4 2.0

Four Stage Gearbox

LRPX40-250V12-___-_127 12 0.26 27.8 14 1.915 271.18 2.921 305.89 3.74 32 2.0 22.50 6 11.7
LRPX40-250V24-___-_127 24 1.1 125.4 14 3.830 542.36 5.842 611.78 3.74 32 1.0 22.50 6 5.9
LRPX40-250V48-___-_127 48 4.5 501.4 14 7.652 1083.55 11.684 1223.57 3.74 32 0.5 22.50 6 2.9
LRPX40-250V12-___-_156 12 0.26 27.8 14 2.340 331.33 3.569 373.74 4.57 26 2.0 22.50 5 9.6
LRPX40-250V24-___-_156 24 1.1 125.4 14 4.679 662.66 7.138 747.48 4.57 26 1.0 22.50 5 4.8
LRPX40-250V48-___-_156 48 4.5 501.4 14 9.349 1323.88 14.276 1494.96 4.57 26 0.5 22.50 5 2.4
LRPX40-250V12-___-_190 12 0.26 27.8 14 2.859 404.82 4.361 456.64 5.58 21 2.0 22.50 4 7.9
LRPX40-250V24-___-_190 24 1.1 125.4 14 5.717 809.65 8.721 913.28 5.58 21 1.0 22.50 4 3.9
LRPX40-250V48-___-_190 48 4.5 501.4 14 11.422 1617.52 17.442 1826.55 5.58 21 0.5 22.50 4 2.0
LRPX40-250V12-___-_210 12 0.26 27.8 14 3.157 447.00 4.815 504.22 6.16 19 2.0 22.50 3 7.1
LRPX40-250V24-___-_210 24 1.1 125.4 14 6.313 894.01 9.630 1008.44 6.16 19 1.0 22.50 3 3.6
LRPX40-250V48-___-_210 48 4.5 501.4 14 12.612 1786.06 19.260 2016.87 6.16 19 0.5 22.50 3 1.8
LRPX40-250V12-___-_232 12 0.26 27.8 14 3.493 494.61 5.328 557.92 6.82 18 2.0 22.50 3 6.4
LRPX40-250V24-___-_232 24 1.1 125.4 14 6.986 989.23 10.656 1115.84 6.82 18 1.0 22.50 3 3.2
LRPX40-250V48-___-_232 48 4.5 501.4 14 13.956 1976.30 21.311 2231.69 6.82 18 0.5 22.50 3 1.6
LRPX40-250V12-___-_257 12 0.26 27.8 14 3.857 546.15 5.883 616.06 7.53 16 2.0 22.50 3 5.8
LRPX40-250V24-___-_257 24 1.1 125.4 14 7.713 1092.30 11.766 1232.11 7.53 16 1.0 22.50 3 2.9
LRPX40-250V48-___-_257 48 4.5 501.4 14 15.410 2182.22 23.532 2464.22 7.53 16 0.5 22.50 3 1.5
LRPX40-250V12-___-_284 12 0.26 27.8 14 4.267 604.32 6.509 681.67 8.33 14 2.0 22.50 3 5.3
LRPX40-250V24-___-_284 24 1.1 125.4 14 8.535 1208.64 13.019 1363.34 8.33 14 1.0 22.50 3 2.6
LRPX40-250V48-___-_284 48 4.5 501.4 14 17.051 2414.65 26.038 2726.69 8.33 14 0.5 22.50 3 1.3
LRPX40-250V12-___-_314 12 0.26 27.8 14 4.712 667.29 7.188 752.70 9.20 13 2.0 22.50 2 4.8
LRPX40-250V24-___-_314 24 1.1 125.4 14 9.424 1334.58 14.376 1505.40 9.20 13 1.0 22.50 2 2.4
LRPX40-250V48-___-_314 48 4.5 501.4 14 18.828 2666.25 28.751 3010.80 9.20 13 0.5 22.50 2 1.2
LRPX40-250V12-___-_346 12 0.26 27.8 14 5.203 736.82 7.937 831.13 10.16 12 2.0 22.50 2 4.3
LRPX40-250V24-___-_346 24 1.1 125.4 14 10.406 1473.64 15.873 1662.26 10.16 12 1.0 22.50 2 2.2
LRPX40-250V48-___-_346 48 4.5 501.4 14 20.790 2944.06 31.747 3324.51 10.16 12 0.5 22.50 2 1.1
LRPX40-250V12-___-_383 12 0.26 27.8 14 5.757 815.30 8.782 919.65 11.24 11 2.0 22.50 2 3.9
LRPX40-250V24-___-_383 24 1.1 125.4 14 11.515 1630.60 17.564 1839.30 11.24 11 1.0 22.50 2 2.0
LRPX40-250V48-___-_383 48 4.5 501.4 14 23.004 3257.63 35.128 3678.61 11.24 11 0.5 22.50 2 1.0
LRPX40-250V12-___-_423 12 0.26 27.8 14 6.357 900.25 9.697 1015.48 12.41 10 2.0 22.50 2 3.5
LRPX40-250V24-___-_423 24 1.1 125.4 14 12.714 1800.50 19.394 2030.95 12.41 10 1.0 22.50 2 1.8
LRPX40-250V48-___-_423 48 4.5 501.4 14 25.401 3597.07 38.788 4061.91 12.41 10 0.5 22.50 2 0.9
LRPX40-250V12-___-_517 12 0.26 27.8 14 7.767 1099.93 11.848 1240.71 15.00 8 1.9 22.50 1 2.9
LRPX40-250V24-___-_517 24 1.1 125.4 14 15.534 2199.86 23.696 2481.43 15.00 8 1.0 22.50 1 1.4
LRPX40-250V48-___-_517 48 4.5 501.4 14 31.035 4394.91 47.392 4962.85 15.00 8 0.5 22.50 1 0.7
LRPX40-250V12-___-_571 12 0.26 27.8 14 8.577 1214.54 13.082 1369.99 15.00 7 1.7 22.50 1 2.6
LRPX40-250V24-___-_571 24 1.1 125.4 14 17.153 2429.08 26.165 2739.98 15.00 7 0.9 22.50 1 1.3
LRPX40-250V48-___-_571 48 4.5 501.4 14 34.269 4852.85 52.330 5479.97 15.00 7 0.4 22.50 1 0.7
LRPX40-250V12-___-_697 12 0.26 27.8 14 10.479 1483.93 15.984 1673.86 15.00 6 1.4 22.50 1 2.1
LRPX40-250V24-___-_697 24 1.1 125.4 14 20.958 2967.86 31.968 3347.72 15.00 6 0.7 22.50 1 1.1
LRPX40-250V48-___-_697 48 4.5 501.4 14 41.870 5929.23 63.937 6695.45 15.00 6 0.4 22.50 1 0.5
LRPX40-250V12-___-_941 12 0.26 27.8 14 14.137 2001.99 21.564 2258.23 15.00 4 1.1 22.50 1 1.6
LRPX40-250V24-___-_941 24 1.1 125.4 14 28.274 4003.97 43.129 4516.46 15.00 4 0.5 22.50 1 0.8
LRPX40-250V48-___-_941 48 4.5 501.4 14 56.487 7999.20 86.258 9032.91 15.00 4 0.3 22.50 1 0.4

General Specifications

Part Number Ratio
(approx.)
Ratio
(Exact)
Backlash (avg)
(Degrees)
Length (Motor +
Gearhead) (mm)
Weight
(g)
Temperature
Range (°C)
System Inertia
(g.cm²)

One Stage Gearbox

LRPX40-250V__-___-_003 3.36 84 / 25 0.8 79.73 527 -40 °C to +100 °C 31.7
LRPX40-250V__-___-_004 4.11 78 / 19 0.7 79.73 527 -40 °C to +100 °C 28.7
LRPX40-250V__-___-_006 5.54 72 / 13 0.7 79.73 527 -40 °C to +100 °C 25.1

Two Stage Gearbox

LRPX40-250V__-___-_011 11.29 7056 / 625 1.0 97.28 602 -40 °C to +100 °C 20.0
LRPX40-250V__-___-_014 13.79 6552 / 475 1.0 97.28 602 -40 °C to +100 °C 19.1
LRPX40-250V__-___-_017 16.85 6084 / 361 0.8 97.28 602 -40 °C to +100 °C 18.3
LRPX40-250V__-___-_019 18.61 6048 / 325 1.0 97.28 602 -40 °C to +100 °C 18.0
LRPX40-250V__-___-_023 22.74 432 / 19 0.8 97.28 602 -40 °C to +100 °C 17.5
LRPX40-250V__-___-_031 30.67 5184 / 169 0.8 97.28 602 -40 °C to +100 °C 16.8

Three Stage Gearbox

LRPX40-250V__-___-_038 37.93 592704 / 15625 1.1 109.13 665 -40 °C to +100 °C 16.5
LRPX40-250V__-___-_046 46.35 550368 / 11875 1.1 109.13 665 -40 °C to +100 °C 16.2
LRPX40-250V__-___-_057 56.63 511056 / 9025 1.0 109.13 665 -40 °C to +100 °C 16.0
LRPX40-250V__-___-_063 62.53 508032 / 8125 1.1 109.13 665 -40 °C to +100 °C 15.9
LRPX40-250V__-___-_069 69.19 474552 / 6859 0.9 109.13 665 -40 °C to +100 °C 15.8
LRPX40-250V__-___-_076 76.40 36288 / 475 1.0 109.13 665 -40 °C to +100 °C 15.7
LRPX40-250V__-___-_093 93.34 33696 / 361 0.9 109.13 665 -40 °C to +100 °C 15.6
LRPX40-250V__-___-_103 103.07 435456 / 4225 1.0 109.13 665 -40 °C to +100 °C 15.5
LRPX40-250V__-___-_126 125.93 31104 / 247 0.9 109.13 665 -40 °C to +100 °C 15.4
LRPX40-250V__-___-_170 169.89 373248 / 2197 0.8 109.13 665 -40 °C to +100 °C 15.3

Four Stage Gearbox

LRPX40-250V__-___-_127 127.46 49787136 / 390625 1.1 120.98 727 -40 °C to +100 °C 15.4
LRPX40-250V__-___-_156 155.73 46230912 / 296875 1.1 120.98 727 -40 °C to +100 °C 15.4
LRPX40-250V__-___-_190 190.27 42928704 / 225625 1.1 120.98 727 -40 °C to +100 °C 15.3
LRPX40-250V__-___-_210 210.09 42674688 / 203125 1.1 120.98 727 -40 °C to +100 °C 15.3
LRPX40-250V__-___-_232 232.47 39862368 / 171475 1.0 120.98 727 -40 °C to +100 °C 15.2
LRPX40-250V__-___-_257 256.69 3048192 / 11875 1.1 120.98 727 -40 °C to +100 °C 15.2
LRPX40-250V__-___-_284 284.03 37015056 / 130321 0.9 120.98 727 -40 °C to +100 °C 15.2
LRPX40-250V__-___-_314 313.62 2830464 / 9025 1.0 120.98 727 -40 °C to +100 °C 15.2
LRPX40-250V__-___-_346 346.30 36578304 / 105625 1.1 120.98 727 -40 °C to +100 °C 15.2
LRPX40-250V__-___-_383 383.19 2628288 / 6859 0.9 120.98 727 -40 °C to +100 °C 15.1
LRPX40-250V__-___-_423 423.12 2612736 / 6175 1.0 120.98 727 -40 °C to +100 °C 15.1
LRPX40-250V__-___-_517 516.96 186624 / 361 0.9 120.98 727 -40 °C to +100 °C 15.1
LRPX40-250V__-___-_571 570.83 31352832 / 54925 1.0 120.98 727 -40 °C to +100 °C 15.1
LRPX40-250V__-___-_697 697.44 2239488 / 3211 0.9 120.98 727 -40 °C to +100 °C 15.1
LRPX40-250V__-___-_941 940.93 26873856 / 28561 0.8 120.98 727 -40 °C to +100 °C 15.1

LRPX40 Connection

hall diagram

LRPX40 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.

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Rapid Delivery to:

Select the region where the product would be delivered to.

The Americas

Part Number Description Typical Lead Time
LRPX40-250V24-120-S006 30 days
LRPX40-250V24-120-S011 30 days
LRPX40-250V24-120-S019 30 days
LRPX40-250V24-120-S031 30 days
LRPX40-250V24-120-S063 30 days
LRPX40-250V24-120-S170 30 days

Europe, the Middle East and Africa

Part Number Description Typical Lead Time
No products available

Asia

Part Number Description Typical Lead Time
LRPX40-250V24-120-S006 30 days
LRPX40-250V24-120-S011 30 days
LRPX40-250V24-120-S019 30 days
LRPX40-250V24-120-S031 30 days
LRPX40-250V24-120-S063 30 days
LRPX40-250V24-120-S170 30 days