Bearing	Porous bearing	Rolling bearing
Axial Endplay	≤0.3mm	≤0.1mm
Radial Loading on Output Shaft	≤50N	≤75N
Operating Temperature	-30℃ ~ +100℃

Gearbox Stages	1	2	3	4
Reduction Ratio	4/6	16/24/36	64/96/144/216	256/384/576/864/1296
Max Rated Torque (gf.cm max)	10000	10000	10000	10000
Max Instant Torque (gf.cm max)	25000	25000	25000	25000
Gearbox Efficiency (%)	90	81	72	65
Length (mm)	17.6	22.9	28.2	33.5

Motors (Optional)	Beushed DC motor, BLDC motor, Coreless motor, Stepper motor
Voltage (Optional)	3-24V
Input Speed	≤15000rpm
Current	300mA max

Model	Rated Speed	Max Speed	Max Rated Torque	Max Instant Torque	Reduction Ratio	Length	Overall Length
	rpm	rpm	gf.cm	gf.cm		mm	mm
ZWBMD020020-4	1875	7500	10000	25000	4	17.6	42.7
ZWBMD020020-6	1250	5000	10000	25000	6	17.6	42.7
ZWBMD020020-16	469	1875	10000	25000	16	22.9	48.0
ZWBMD020020-24	313	1250	10000	25000	24	22.9	48.0
ZWBMD020020-36	208	833	10000	25000	36	22.9	48.0
ZWBMD020020-64	117	469	10000	25000	64	28.2	53.3
ZWBMD020020-96	78	313	10000	25000	96	28.2	53.3
ZWBMD020020-144	52	208	10000	25000	144	28.2	53.3
ZWBMD020020-216	35	139	10000	25000	216	28.2	53.3
ZWBMD020020-256	29	117	10000	25000	256	33.5	58.6
ZWBMD020020-384	20	78	10000	25000	384	33.5	58.6
ZWBMD020020-576	13	52	10000	25000	576	33.5	58.6
ZWBMD020020-864	9	35	10000	25000	864	33.5	58.6
ZWBMD020020-1296	6	23	10000	25000	1296	33.5	58.6

20mm Stepper Gear Motor

Gearbox Specifications: