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40PA/42BYG Stepping motor planetary gear reducer, 1. planetary gear motor, 2. DC motors, 3. planetary gearbox, 4. gear motor - details see: https://www.machineto.com/40pa-42byg-gear-motor-10234633

40PA/42BYG Stepping motor planetary gear reducer
1. planetary gear motorn

2.gearbox

40PAXXXG Planetary gear reducer parameters XXX=Reduction Ratio

Reduction Ratio(X:1)	3	4	5	9	12	20	25	36	48	60	80	100	125
Number of gear trains	1	1	1	2	2	2	2	3	3	3	3	3	3
Rated output torque(kg.cm)	20	20	20	30	30	30	30	40	40	40	40	40	40
Gear Box Length(mm)	31.5	31.5	31.5	40.5	40.5	40.5	40.5	49.5	49.5	49.5	49.5	49.5	49.5

42BYG Stepping motor parameter

Model	Step Angle	Length (Ld)	Phase Voltage	Phase Current	Phase Resistance	Phase Inductance	Holding Torque	Lead Wire
42BYGH25(M)-091-4A/B	1.8/0.9	25mm	12V	0.91A	3.3Ω	8mH	1600g.cm	4
42BYGH34(M)-040-4A/B	1.8/0.9	34mm	12V	0.4A	30Ω	37mH	2200g.cm	4
42BYGH40(M)-040-6A/B	1.8/0.9	40mm	2.78V	0.4A	30Ω	21mH	2570g.cm	6
42BYGH40(M)-160-4A/B	1.8/0.9	40mm	12V	1.6A	1.73Ω	3.2mH	3600g.cm	4
42BYGH48(M)-040-6A/B	1.8/0.9	48mm	3.6V	0.4A	30Ω	25mH	3200g.cm	6
42BYGH48(M)-120-4A/B	1.8/0.9	48mm	3V	1.2A	3Ω	5mH	4500g.cm	4

Gearbox diameter:φ40mm
Output shaft diameter:φ8mm
Configuration encoder:yea
We could customize to meet your special requirements.