Planetary Gearboxes

SB Series Planetary Gearboxes

The SB Series is a high-precision planetary gearbox line designed for servo motor applications. Built with precision-cut metal geartrains, full needle bearings, and optimized gear geometry, SB reducers deliver quiet operation, high torque density, and long service life in a compact cylindrical form factor.

Available in frame sizes 042, 060, 090, 115, 142, 180, and 220 with single-stage and multi-stage reduction ratios from 3:1 to 100:1. Rated output torque ranges from 19 Nm (042SB at 3:1) to 1,140 Nm (220SB at 3:1).

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SB Series 042 planetary gearbox, front view

Key Features

Super precision backlash P0: ≤1 arcmin (3:1–10:1 ratios)
Precision backlash P1: ≤3 arcmin
Standard backlash P2: ≤5–7 arcmin
Efficiency ≥97% (single stage, 3:1–10:1 ratios)
Rated input speed: 3,000 rpm standard / 6,000 rpm high speed
Protection class IP65 with synthetic lubricating grease
Mounting in any direction
Operating temperature −10°C to +90°C
Continuous service life rated at 20,000 hours
Noise ≤56–70 dB(A) at 3000 rpm no load depending on frame size

Frame Size Specifications

Key performance data per frame size. All values based on catalog-rated conditions.

Frame Size	Flange ⌀	Body Length	Rated Torque Range	Weight	Noise Level
042	50 mm	42 mm	14–22 Nm	0.6 kg	≤56 dB(A)
060	70 mm	60 mm	40–60 Nm	1.3 kg	≤58 dB(A)
090	100 mm	90 mm	100–160 Nm	3.7 kg	≤60 dB(A)
115	130 mm	115 mm	208–330 Nm	7.8 kg	≤63 dB(A)
142	165 mm	142 mm	342–650 Nm	14.5 kg	≤65 dB(A)
180	215 mm	180 mm	588–1,200 Nm	29 kg	≤67 dB(A)
220	250 mm	220 mm	1,140–2,000 Nm	48 kg	≤70 dB(A)

Product Gallery

Multiple angles and views for every frame size.

042Frame Size 0428 images

SB 042 planetary gearbox, front view — 042SB - front

SB 042 planetary gearbox, angled view — 042SB - angle

SB 042 planetary gearbox, product view 1 — 042SB - view 1

SB 042 planetary gearbox, product view 2 — 042SB - view 2

SB 042 planetary gearbox, product view 3 — 042SB - view 3

SB 042 planetary gearbox, product view 4 — 042SB - view 4

SB 042 planetary gearbox, product view 5 — 042SB - view 5

SB 042 planetary gearbox, product view 6 — 042SB - view 6

060Frame Size 0608 images

SB 060 planetary gearbox, front view — 060SB - front

SB 060 planetary gearbox, angled view — 060SB - angle

SB 060 planetary gearbox, product view 1 — 060SB - view 1

SB 060 planetary gearbox, product view 2 — 060SB - view 2

SB 060 planetary gearbox, product view 3 — 060SB - view 3

SB 060 planetary gearbox, product view 4 — 060SB - view 4

SB 060 planetary gearbox, product view 5 — 060SB - view 5

SB 060 planetary gearbox, product view 6 — 060SB - view 6

090Frame Size 0908 images

SB 090 planetary gearbox, front view — 090SB - front

SB 090 planetary gearbox, angled view — 090SB - angle

SB 090 planetary gearbox, product view 1 — 090SB - view 1

SB 090 planetary gearbox, product view 2 — 090SB - view 2

SB 090 planetary gearbox, product view 3 — 090SB - view 3

SB 090 planetary gearbox, product view 4 — 090SB - view 4

SB 090 planetary gearbox, product view 5 — 090SB - view 5

SB 090 planetary gearbox, product view 6 — 090SB - view 6

115Frame Size 1158 images

SB 115 planetary gearbox, front view — 115SB - front

SB 115 planetary gearbox, angled view — 115SB - angle

SB 115 planetary gearbox, product view 1 — 115SB - view 1

SB 115 planetary gearbox, product view 2 — 115SB - view 2

SB 115 planetary gearbox, product view 3 — 115SB - view 3

SB 115 planetary gearbox, product view 4 — 115SB - view 4

SB 115 planetary gearbox, product view 5 — 115SB - view 5

SB 115 planetary gearbox, product view 6 — 115SB - view 6

142Frame Size 1428 images

SB 142 planetary gearbox, front view — 142SB - front

SB 142 planetary gearbox, angled view — 142SB - angle

SB 142 planetary gearbox, product view 1 — 142SB - view 1

SB 142 planetary gearbox, product view 2 — 142SB - view 2

SB 142 planetary gearbox, product view 3 — 142SB - view 3

SB 142 planetary gearbox, product view 4 — 142SB - view 4

SB 142 planetary gearbox, product view 5 — 142SB - view 5

SB 142 planetary gearbox, product view 6 — 142SB - view 6

Dimensional Drawings

Technical drawings for servo and stepper motor configurations. Download PDF versions below.

042Frame Size 042 Drawings

Servo Motor042SB servo motor dimensional drawing (1-stage)

Stepper Motor042SB stepper motor dimensional drawing

060Frame Size 060 Drawings

Servo Motor060SB servo motor dimensional drawing (1-stage)

Stepper Motor060SB stepper motor dimensional drawing

090Frame Size 090 Drawings

Servo Motor090SB servo motor dimensional drawing (1-stage)

Stepper Motor090SB stepper motor dimensional drawing

115Frame Size 115 Drawings

Servo Motor115SB servo motor dimensional drawing (1-stage)

Stepper Motor115SB stepper motor dimensional drawing

142Frame Size 142 Drawings

Servo Motor142SB servo motor dimensional drawing (1-stage)

Cutaway Views

Internal construction showing precision gearing and bearing arrangement.

SB Series planetary gearbox cutaway prototype — SB Series cutaway - sectional view

SB Series planetary gearbox cutaway prototype, alternate view — SB Series cutaway - alternate angle

SB Series Helical Planetary Gearbox

High Precision
Quiet and smooth operation
High Torque
Compact Design
Backlash ≤1-≤5 arcmin
≥97% efficiency
IP65
Operating Temp -25° to 90°C
Multiple stage configurations
Customs available

Reducer Performance Data

Specifications		Node Number	Reduction Ratio	042SB	060SB	060(A)SB	090SB	090(A)SB	115SB	142SB	180SB	220SB
Rated Output Torque T2N		1	3	–	55	–	130	–	208	342	588	1140
			4	19	50	–	140	–	290	542	1050	1700
			5	22	60	–	160	–	330	650	1200	2000
			6	20	55	–	150	–	310	600	1100	1900
			7	19	50	–	140	–	300	550	1100	1800
			8	17	45	–	120	–	260	500	1000	1600
			9	14	40	–	100	–	230	450	900	1500
			10	14	40	–	100	–	230	450	900	1500
	Nm	2	15	–	55	55	130	130	208	342	588	1140
			20	19	50	50	140	140	290	542	1050	1700
			25	22	60	60	160	160	330	650	1200	2000
			30	20	55	55	150	150	310	600	1100	1900
			35	19	50	50	140	140	300	550	1100	1800
			40	17	45	45	120	120	260	500	1000	1600
			45	14	40	40	100	100	230	450	900	1500
			50	22	60	60	160	160	330	650	1200	2000
			60	20	55	55	150	150	310	600	1100	1900
			70	19	50	50	140	140	300	550	1100	1800
			80	17	45	45	120	120	260	500	1000	1600
			90	14	40	40	100	100	230	450	900	1500
			100	14	40	40	100	100	230	450	900	1500
Emergency Stop Torque T	Nm	1,2	3~100				3 Times of Output Rated Torque
Rated Input Speed n1N	rpm	1,2	3~100	3000	3000	3000	3000	3000	3000	3000	3000	2000
Rated Input Speed n1B	rpm	1,2	3~100	6000	6000	6000	6000	6000	6000	6000	6000	4000
Super Precision Backlash PO	arcmin	1	3~10	–	–	–	–	–	≤1	≤1	≤1	≤1
Super Precision Backlash PO	arcmin	2	15~100	–	–	–	–	–	≤3	≤3	≤3	≤3
		1	3~10	≤3	≤3	–	≤3	–	≤3	≤3	≤3	≤3
Precision Backlash P1	arcmin	2	15~100	≤5	–	≤5	≤5	≤5	≤5	≤5	≤5	≤5
Standard Backlash P2	arcmin	1	3~10	≤5	≤5	–	≤5	–	≤5	≤5	≤5	≤5
Standard Backlash P2	arcmin	2	15~100	≤7	–	≤7	≤7	≤7	≤7	≤7	≤7	≤7
Torsional Stiffness	Nm/arcmin	1,2	3~100	2	7	7	14	14	25	50	145	225
Allowable Radial Force F2rB3	N	1,2	3~100	780	1530	1530	3250	3250	6700	9400	14500	50000
Allowable Axial Force F	N	1,2	3~100	390	765	765	1625	1625	3350	4700	7250	25000
Service Life	hr	1,2	3~100				20000*
		1	3~10				≥97%
Efficiency η	%	2	15~100				≥94%
Weight	Kg	1	3~10	0.6	1.3	–	3.7	–	7.8	14.5	29	48
Weight	Kg	2	15~100	0.8	1.5	1.9	4.1	5.3	9	17.5	33	60
Operating Temperature	℃	1,2	3~100				-10℃~+90℃
Lubrication		1,2	3~100				Synthetic Lubricating Grease
Protection Class		1,2	3~100				IP65
Mounting Position		1,2	3~100				Any Direction
Noise Level at 1m Distance (n1=3000rpm, No Load)	dB(A)	1,2	3~100	≤56	≤58	≤60	≤60	≤63	≤63	≤65	≤67	≤70

Moment Of Inertia Of The Reducer

Specifications		Node Number	Reduction Ratio	042SB	060SB	060(A)SB	090SB	090(A)SB	115SB	142SB	180SB	220SB
Moment Of Inertia J1	Kg·cm2	1	3	–	0.16	–	0.61	–	3.25	9.21	28.98	69.61
			4	0.03	0.14	–	0.48	–	2.74	7.54	23.67	54.37
			5	0.03	0.13	–	0.47	–	2.71	7.42	23.29	53.27
			6	0.03	0.13	–	0.45	–	2.65	7.25	22.75	51.72
			7	0.03	0.13	–	0.45	–	2.62	7.14	22.48	50.97
			8	0.03	0.13	–	0.44	–	2.58	7.07	22.59	50.84
			9	0.03	0.13	–	0.44	–	2.57	7.04	22.53	50.63
			10	0.03	0.13	–	0.44	–	2.57	7.03	22.51	50.56
		2	15	–	0.03	0.13	0.13	0.47	0.47	2.71	7.42	23.29
			20	0.03	0.03	0.13	0.13	0.47	0.47	2.71	7.42	23.29
			25	0.03	0.03	0.13	0.13	0.47	0.47	2.71	7.42	23.29
			30	0.03	0.03	0.13	0.13	0.47	0.47	2.71	7.42	23.29
			35	0.03	0.03	0.13	0.13	0.47	0.47	2.71	7.42	23.29
			40	0.03	0.03	0.13	0.13	0.47	0.47	2.71	7.42	23.29
			45	0.03	0.03	0.13	0.13	0.47	0.47	2.71	7.42	23.29
			50	0.03	0.03	0.13	0.13	0.44	0.44	2.57	7.03	22.51
			60	0.03	0.03	0.13	0.13	0.44	0.44	2.57	7.03	22.51
			70	0.03	0.03	0.13	0.13	0.44	0.44	2.57	7.03	22.51
			80	0.03	0.03	0.13	0.13	0.44	0.44	2.57	7.03	22.51
			90	0.03	0.03	0.13	0.13	0.44	0.44	2.57	7.03	22.51
			100	0.03	0.03	0.13	0.13	0.44	0.44	2.57	7.03	22.51

1.Gear ratio(i=Nin/Nout) 2.Maximum acceleration torque T2B=60% of T2NOT 3.When the output speed is 100rpm, it will act on the central position of the output shaft. *Continuous operation, service life is 10000hrs

Single Stage, Reduction Ratio i=3~10

Dimensional Drawing
Dimensional Table

Size	042SB	060SB	090SB	115SB	142SB	180SB	220SB
D1	50	70	100	130	165	215	250
D2	3.4	5.5	6.6	9	11	13	17
D3 h6	13	16	22	32	40	55	75
D4 g6	35	50	80	110	130	160	180
D5	M4×0.7P	M5×0.8P	M8×1.25P	M12×1.75P	M16×2P	M20×2.5P	M20×2.5P
D6	56	80	116	152	185	240	292
L1	42	60	90	115	142	180	220
L2	26	37	48	65	97	105	138
L3	5.5	7	10	12	15	20	30
L4	1	28	35.5	51	79	82	105
L5	16	25	32	40	70	70	90
L6	2	2	2	5	4	6	7
L7	4	6	8	10	15	20	25
L8	31	65.5	78	101.5	119.5	154	163.5
L9	4.8	12.5	19	28	36	42	42
C1	46	70	100	130	165	215	235
C2	M4×0.7P	M5×0.8P	M6×1P	M8×1.25P	M10×1.5P	M12×1.75P	M12×1.75P
C3	*≤11/≤12	*≤14/≤16	≤19/≤24	≤32	≤35/≤38	≤42/≤48	≤55
C4	25	35	40.5	51	60	85	116
C5 G6	30	50	80	110	130	180	200
C6	3.5	8	4	5	6	6	6
C7	42	60	90	115	142	190	220
C8	29.5	19.5	17.5	20	22.5	29	63
C9	114	122	143.5	186.5	239	288	364.5
B1 h9	5	5	6	10	12	16	20
H1	15	18	24.5	35	43	59	79.5

*060SB 5,10 Reduction ratio provides C3≤16 to choose from.

Two Stage, Reduction Ratio i=15~100

Size	042SB	060(A)SB	090SB	090(A)SB	115SB	142SB	180SB	220SB
D1	50	70	100		130	165	215	250
D2	3.4	5.5	6.6		9	11	13	17
D3 h6	13	16	22		32	40	55	75
D4 g6	35	50	80		110	130	160	180
D5	M4×0.7P	M5×0.8P	M8×1.25P		M12×1.75P	M16×2P	M20×2.5P	M20×2.5P
D6	56	80	116		152	185	240	292
L1	42	60	90		115	142	180	220
L2	26	37	48		65	97	105	138
L3	5.5	7	10		12	15	20	30
L4	1	28	36		51	79	82	105
L5	16	25	32		40	70	70	90
L6	2	2	3		5	4	6	7
L7	4	6	8		10	15	20	25
L8	58.5	102.5	116	126	143	169.5	207.5	246
L9	10	12.5	19		28	36	42	42
C1	46	70	70	100	100	130	165	215
C2	M4×0.7P	M5×0.8P	M5×0.8P	M6×1P	M6×1P	M8×1.25P	M10×1.5P	M12×1.75P
C3	≤11/≤12	≤14/≤16	≤14/≤15.875/≤16	≤19/≤24	≤19/≤24	≤32	≤35/≤38	≤42/≤48
C4	25	35	35	40.5	40	50	60	85
C5 G6	30	50	50	80	80	110	130	180
C6	3.5	8	8	4	4	5	6	6
C7	42	60	60	90	90	115	142	190
C8	29.5	19.5	19.5	17.5	17.5	12.5	22.5	29
C9	114	159	183.5	191.5	225.5	283.5	335	409
B1 h9	5	5	6		10	12	16	20
H1	15	18	24.5		35	43	59	79.5

Downloads

Catalogs, datasheets, and dimensional drawing PDFs.

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SB Series Planetary Gearboxes

Key Features

Frame Size Specifications

Product Gallery

042Frame Size 0428 images

060Frame Size 0608 images

090Frame Size 0908 images

115Frame Size 1158 images

142Frame Size 1428 images

Dimensional Drawings

042Frame Size 042 Drawings

060Frame Size 060 Drawings

090Frame Size 090 Drawings

115Frame Size 115 Drawings

142Frame Size 142 Drawings

Cutaway Views

SB Series Helical Planetary Gearbox

Reducer Performance Data

Single Stage, Reduction Ratio i=3~10

Two Stage, Reduction Ratio i=15~100

Downloads

SB Series Planetary Gearbox Catalog (Full)

SB 060 Datasheet

High-Precision SB/SBR/SE/SD Catalog

042SB Servo Motor Drawing (1-stage, PDF)

042SB Stepper Motor Drawing (1-stage, PDF)

060SB Servo Motor Drawing (1-stage, PDF)

060SB Stepper Motor Drawing (1-stage, PDF)

090SB Servo Motor Drawing (1-stage, PDF)

090SB Stepper Motor Drawing (1-stage, PDF)

115SB Servo Motor Drawing (1-stage, PDF)

115SB Stepper Motor Drawing (1-stage, PDF)

142SB Servo Motor Drawing (1-stage, PDF)

Datasheet

Ready to spec your next motion system?