28mm Planetary Gearbox.Permissible Load Range: 1.5N.m~5
Planetary Gearbox
Bearing at output | Ball bearings | Sleeve bearings |
Max. Radial load（10mm from flange） | 100N | 100N |
Max. shaft axial load | 50N | 50N |
Radial play of shaft（ near to flange） | ≤0.08 mm | ≤0.1 mm |
Axial play of shaft | ≤0.3 mm | ≤0.3 mm |
28STH Hybrid Stepping Motor Specifications
Model No. | Current /Phase | Resistance /Phase | lnductance /Phase | Holding Torque | Detent Torque | # of Leads | Rotor lnertia | Weight | Length LD |
Single Shaft | A | Ω | mH | N.m | N.m | g-cm2 | kg | mm | |
28STH45-0956A | 0.95 | 3.4 | 1.2 | 0.075 | 0.006 | 6 | 12 | 0.14 | 45 max |
28STH51-0956A | 0.95 | 4.6 | 1.8 | 0.090 | 0.008 | 6 | 18 | 0.20 | 51 max |
Planetary Gearbox Specifications
Reduction ratio | 4 | 6 | 16 | 24 | 36 | 64 | 96 | 144 | 216 | ||
Accurate Reduction Ratio | 4.00 | 6.00 | 16.00 | 24.00 | 36.00 | 64.00 | 96.00 | 144.00 | 216.00 | ||
umber of gear trains | 1 | 2 | 3 | ||||||||
Length(L2) mm | 28.9 | 35.8 | 42.7 | ||||||||
Max. rated torque | N.m | 1.5 | 2.5 | 4.0 | |||||||
Short time permissible torque | N.m | 4.5 | 7.5 | 12 | |||||||
Efficiency % | 90% | 81% | 73% | ||||||||
Backlash at no-load | 0.5° | 1.0° | 1.5° | ||||||||
Weight g | 75 | 97 | 119 | ||||||||
28STH Pull Out Torque Curve
Dimensions
Integer reduction ratio of planetary gear motor.
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