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28mm Planetary gearbox

Series: P281
Output Torque: 2.0 to 10Kg・cm
Output Shaft Options: D-shaft, Round shaft, H-shaft
Bearing Type: Sleeve bearing or Ball bearing
Reduction Ratio Range: 1:4 to1:939
Operating Ambient Temperature: -15℃ ~ 70℃
Application: Industrial Machinery, Precision Instruments, Automated Vending Equipment, Self-Service Banking Kiosks

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Model:
P281
Brand:
I.CH

The 28mm Planetary Gearbox 27:1 delivers precision-engineered performance: 27:1 gear ratio for high torque, smooth power transmission, and durability. Compact and space-saving, it’s ideal for industrial automation, small robotics, and space-constrained demanding applications. A reliable 28mm planetary gearbox 27:1 solution.

Gearbox Description of 28mm Planetary gearbox
Housing material	Bearing at output	Radial load (10mm from flange)	Shaft axial load	Shaft press fit force,max.	Radial play of shaft	Thrust play of shaft	Backlash at no-load
Metal	Sleeve bearings	≤3Kgf	≤2.5Kgf	≤10Kgf	≤0.08mm	≤0.2mm	≤3°
Metal	Ball bearings	≤3.5Kgf	≤2.5Kgf	≤10Kgf	≤0.05mm	≤0.2mm	≤3°

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Motor Shaft Pinion Specification
Module	No. of teeth	Pressure angle	Hole diameter	Reduction ratio.
0.5	11	20°	2.28	1/5,1/19,1/27,1/71,1/100,1/139,1/264,1/516,1/721
0.5	17	20°	2.28	1/4,1/14,1/51,1/189
0.5	8	20°	2.28	1/35,1/939

Motor Shaft Pinion Specification
Module	No. of teeth	Pressure angle	Hole diameter	Reduction ratio.
0.5	11	20°	2.28	1/5,1/19,1/27,1/71,1/100,1/139,1/264,1/516,1/721
0.5	17	20°	2.28	1/4,1/14,1/51,1/189
0.5	8	20°	2.28	1/35,1/939

Gearbox Specification
Reduction ratio	1/4	1/5	1/14	1/19	1/27	1/35	1/51	1/71	1/100	1/139	1/189	1/264	1/516	1/721	1/939
Rated tolerance torque (Kg.cm Max.)	2	2	3	3	4	4	6	6	8	8	10	10	10	10	10
Max momentary tolerance torque (Kg.cm )	6	6	9	9	12	12	18	18	24	24	30	30	30	30	30
Efficiency	80%	80%	70%	70%	70%	70%	60%	60%	60%	60%	50%	50%	50%	50%	50%
Length （L-mm）	24.5	24.5	30.9	30.9	30.9	30.9	37.3	37.3	37.3	37.3	43.7	43.7	43.7	43.7	43.7
Weight（g） Sleeve bearings	71	71	81	81	81	81	94	94	94	94	108	108	108	108	108
Weight（g） Sleeve bearings	70	70	80	80	80	80	93	93	93	93	107	107	107	107	107

Gearbox Specification
Reduction ratio	1/4	1/5	1/14	1/19	1/27	1/35	1/51	1/71	1/100	1/139	1/189	1/264	1/516	1/721	1/939
Rated tolerance torque (Kg.cm Max.)	2	2	3	3	4	4	6	6	8	8	10	10	10	10	10
Max momentary tolerance torque (Kg.cm )	6	6	9	9	12	12	18	18	24	24	30	30	30	30	30
Efficiency	80%	80%	70%	70%	70%	70%	60%	60%	60%	60%	50%	50%	50%	50%	50%
Length （L-mm）	24.5	24.5	30.9	30.9	30.9	30.9	37.3	37.3	37.3	37.3	43.7	43.7	43.7	43.7	43.7
Weight（g） Sleeve bearings	71	71	81	81	81	81	94	94	94	94	108	108	108	108	108
Weight（g） Sleeve bearings	70	70	80	80	80	80	93	93	93	93	107	107	107	107	107