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PG Series Gearboxes

 
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Product Overview:
The Planetary Gearbox series of gearboxes and gearmotors feature robust planetary gearing inside paired with reliable motors. They come in 27:1, 71:1, and 188:1 ratios and can be bought individually or with a 500 series or 775 series motor pre-installed. 775 series motors come with an integrated quadrature encoder, simplifying feedback control.

Useful Additional PG Parts:
Gearbox Lengths
  • PG27 Gearbox Overall Length: 2.84"
  • PG27 with 9015, Overall Length: 5.5"
  • PG27 with 775, Overall Length: 6.12"
  • PG71 Gearbox Overall Length: 3.27"
  • PG71 with 9015, Overall Length: 5.90"
  • PG71 with 775, Overall Length: 6.26"
  • PG188 Gearbox Overall Length: 3.73"
  • PG188 with 9015, Overall Length: 6.2"
  • PG188 with 775, Overall Length: 6.70
Physical Specifications Common Among all PG Series with and without Motors:
  • Pre-Lubricated
  • Gear Material: Steel
  • Body Material: Steel
  • Input Voltage: 12 Volt DC
  • Mounting Holes: Four, M4x0.7 threaded holes 9mm deep
  • Output Shaft Profile: 10mm (0.393") diameter with 4mm (0.157") keyway, adapters available separately
  • Maximum torque applied at shaft which breaks gearbox: 39 ft-lbs (breakage point is shearing of shaft)
Gearbox Weights:
  • PG27 Gearbox Weight: 0.8 Lbs
  • PG27 with 9015 Weight: 1.4 Lbs
  • PG27 with 775 Weight: 1.6 Lbs
  • PG71 Gearbox Weight: 0.18 Lbs
  • PG71 with 9015 Weight: 1.67 Lbs
  • PG71 with 775 Weight: 2.0 Lbs
  • PG188 Gearbox Weight: 1.3 Lbs
  • PG188 with 9015 Weight: 1.92 Lbs
  • PG188 with 775 Weight: 2.1 Lbs
No Load Free Speed:
  • PG27 with 9015: 510 RPM
  • PG27 with 775: 198 RPM
  • PG71 with 9015: 200 RPM
  • PG71 with 775: 75 RPM
  • PG188 with 9015: 75 RPM
  • PG188 with 775: 28 RPM
No Load Current
  • PG27 with 9015: 1.2 Amps
  • PG27 with 775: 0.6 Amps
  • PG71 with 9015: 1.8 Amps
  • PG71 with 775: 0.6 Amps
  • PG188 with 9015: 1.3 Amps
  • PG188 with 775: 0.6 Amps
Stall Current
  • Gearboxes with 9015: 63 Amps
  • Gearboxes with 775: 22 Amps
Stall Torque
  • PG27 with 9015: 5.8 ft-lbf
  • PG27 with 775: 6.3 ft-lbf
  • PG71 with 9015: 14 ft-lbf
  • PG71 with 775: 16.6 ft-lbf
  • PG188 with 9015: 33 ft-lbf
  • PG188 with 775: 33 ft-lbf
Gearbox Output Power
  • PG27 with 9015: 110 Watts
  • PG27 with 775:
  • PG71 with 9015: 100 Watts
  • PG71 with 775: 44 Watts
  • PG188 with 9015: 90 Watts
  • PG188 with 775:
Minimum Torque Needed to Back Drive Non-Powered
  • PG27 Gearbox: 0.3 ft-lbs
  • PG188 Gearbox: 3.5 ft-lbs
Encoder Performance Specifications for 775 Paired PG Gearmotors:
  • Pulses Per Revolution: 7
  • Operating Voltage: 5VDC
  • Pinout:
    • Pin 1: 5Vdc
    • Pin 2: Gnd
    • Pin 3: Encoder Output Cha. A
    • Pin 4: Encoder Output Cha. B
  • Note: Because the encoder is connected to the back of the motor shaft, the rotation is backwards from normal front mounted encoders so you will need compensate for this in software or simply connect Ch. A output to your Ch. B input and Ch. B output to your Ch. A input.

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