28JXS40K/28STH_Hybrid step planetary gear reduction motor_Product CenterZhejiang Dongzheng Electric Motor Co., Ltd

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28JXS40K/28STH

Planetary GearboxRing materialMetalBearing at outputBall bearingsMax. Radial load  &n...

Material of the internal gear ring
28JXS40K/28STH: Metal material
Diameter: Φ28mm planetary reducer
Allowable torque range: 1.2N.m to 4.0N.m

product details

Outline reference diagram

Planetary Gearbox

Ring material	Metal
Bearing at output	Ball bearings
Max. Radial load （10mm from flange）	35N
Max. shaft axial load	25N
Radial play of shaft （near to flange）	0.07mm
Axial play of shaft	≤0.3 mm
Backlash at no-load	1.5°

28STH Hybrid Stepping Motor Specifications

Model No.	Rated Voltage	Current /Phase	Resistance /Phase	Inductance /Phase	Holding Torgue	of Leads	Rotor Inertia	Weight	Length L1	Max. Gear Ratio
Single Shaft	V	A	Ω	mH	g.cm		g-m²	g	mm
28STH45-0956A	3.4	0.95	3.4	1.2	750	6	12	44.5	44.5	≤1:189
28STH51-0956A	4.4	0.95	4.6	1.8	900	6	18	50.5	50.5	≤1:189

28JXS40K Planetary Gearbox Specifications

Reduction ratio	3.71	5.18	14	19	27	51	71	100	139	189	264	369
Number of gear trains	1		2			3				4
Length(L2) mm	31.0		40.1			49.0				57.9
kg. cm Max. rated torque	12		20			32				40
kg.cm Short time permissible torque	36		60			96				120
Efficiency %	90%		81%			73%				66%
Weight g	60		85			95				110

Frequency-torque Characteristics

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42JXGS100K/42STH

Material of the internal gear ring

42JXGS100K/42STH: Metal material

Diameter: Φ42mm planetary reducer

Allowable torque range: 3 n.m to 10 n.m

42JXGTS200K/42STH

Material of the internal gear ring

42JXGTS200K/42STH: Metal material

Diameter: Φ42mm planetary reducer

Allowable torque range: 6 n.m to 20 n.m

22JXS20K/20STH

Material of the internal gear ring

22JXS20K/20STH: Metal material

Diameter: Φ22mm standard type reducer

Allowable torque range: 0.6N.m to 2.0N.m

36JXES60K/42STH

Material of the internal gear ring

36JXES60K/42STH: Metal material

36JXFS60K/42STH: Powdered metal

Diameter: Φ36mm planetary reducer

Allowable torque range: 1.8N.m to 6.0N.m

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