1 - NEMA Size Gearheads and Motors SELECTION CHARTS Gearhead Type Comparison  ................................................................ 1– 1 NEMA Size Planetary Gearheads, Inch ................................................ 1– 2 NEMA Size Planetary Gearheads, Metric ............................................. 1– 3 Planetary Gear System ......................................................................... 1– 3 Gearhead Component Selection  .......................................................... 1– 4 Gearhead to Motor Mounting Information ............................................. 1– 5 PLANETARY GEARHEADS, Inch NEMA Size 17 ....................................................................................... 1– 6 NEMA  Size  23 ....................................................................................... 1– 8 NEMA Size 34 ....................................................................................... 1– 12 NEMA Size 42 ....................................................................................... 1– 16 PLANETARY GEARHEADS, Metric Size 60 .................................................................................................. 1– 20 Size 90 .................................................................................................. 1– 24 Size 115 ................................................................................................ 1– 28 RIGHT ANGLE PLANETARY GEARHEADS, Inch NEMA  Size  23 ....................................................................................... 1– 10 NEMA Size 34 ....................................................................................... 1– 14 NEMA Size 42 ....................................................................................... 1– 18 RIGHT ANGLE PLANETARY GEARHEADS, Metric Size 60 .................................................................................................. 1– 22 Size 90 .................................................................................................. 1– 26 Size 115 ................................................................................................ 1– 30 SERVOMOTORS NEMA Sizes 23 & 34  ............................................................ 1–32 thru 1– 34 OPTICAL ROTARY ENCODERS ................................................................ 1– 35 STEPPER GEARMOTORS NEMA   Sizes   17   &   23  ............................................................ 1–36 and 1– 37 STEPPER MOTOR TECHNICAL SPECIFICATIONS ................................. 1– 38 INERTIA CONVERSION TABLE ................................................................. 1– 39 STEPPER MOTORS NEMA Sizes 17, 23, 34 & 42  ................................................ 1–40 thru 1– 55 STEPPER MOTOR WIRING CONFIGURATION ........................................ 1 –43 STEPPER MOTOR DRIVE MODULES ....................................................... 1– 56 STEPPER MOTOR DRIVE with GEARHEAD  ............................................ 1–57 1–0 Home Page