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Nema 17 Stepper Motor Bipolar L=48mm w/ Gear Ratio 27:1 Planetary Gearbox

NO.:SKU:17HS19-1684S-PG27
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This Nema 17 stepper motor with 48mm body and 1.68A rated current, integrated a planetary gearbox of 26.85:1 gear ratio. It's a good solution to applications that with limited space but need low speed and/or high torque.

Electrical Specification

  • Manufacturer Part Number: 17HS19-1684S-PG27
  • Motor Type: Bipolar Stepper
  • Step Angle: 0.067 deg
  • Holding Torque without Gearbox: 44Ncm(62.31oz.in)
  • Rated Current/phase: 1.68A
  • Phase Resistance: 1.65ohms
  • Voltage: 2.8V
  • Inductance: 2.8mH ± 20%(1KHz)

Gearbox Specifications

  • Gearbox Type: Planetary
  • Gear Ratio: 26.85: 1
  • Efficiency: 81%
  • Backlash at No-load: <=1 deg
  • Max.Permissible Torque: 3Nm(425oz.in)
  • Moment Permissible Torque: 5Nm(708oz.in)
  • Shaft Maximum Axial Load: 50N
  • Shaft Maximum Radial Load: 100N

Physical Specifications

  • Frame Size: 42 x 42mm
  • Motor Length: 48mm
  • Gearbox Length: 35mm
  • Shaft Diameter: Φ8mm
  • Shaft Length: 20mm
  • D-cut Length: 15mm
  • Number of Leads: 4
  • Lead Length: 500mm
  • Weight: 570g

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Gearbox Specification
Backlash at No-load(Max.°) 1
Efficiency 81%
Gear Ratio 26.85:1
Gearbox Length(mm) 35
Gearbox Type Planetary
Max. Permissible Torque(Ncm) 300
Max. Permissible Torque(oz.in) 424.8
Moment Permissible Torque(Ncm) 708.1
Shaft Maximum Axial Load(N) 50
Shaft Maximum Radial Load(N) 100
Motor Specification
Inductance(mH) 3.2
Lead Length(mm) 500
Motor Nema Size Nema 17
No. of Lead 4
Phase Resistance(ohm) 1.8
Rated Current (A) 1.68
Shaft Diameter(mm) 8
Shaft Length(mm) 20
Bipolar/Unipolar Bipolar
Holding Torque w/o Gearbox(Ncm) 52
Holding Torque w/o Gearbox(oz.in) 73.6
Motor Length(mm) 48
Single Shaft/Dual Shaft Single Shaft
Shaft Type D-Cut
Physical Specification
Weight(g) 600

chris bordeleau – 27 Jul 2016

this motor worked great... plenty of torque and average noise for these motors... I'd buy another if I needed one

Alex – 05 Dec 2015

Seems solid, disassembled to inspect, planet gears are nylon, I hope it lasts long.
As expected, stepper is gear drive.
Includes data sheet, VERY useful.
Works great though, real ratio is 26 103/121 : 1
Using for single Z lift on small 3d printer for super high precision.

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