Slotless BLDC Motor

22 mm Slotless Brushless DC Motor

Compact 22 mm slotless (ironless-winding) brushless DC motor family designed for high-speed rotary motion and high-torque-density applications requiring Hall sensor feedback, low cogging, and smooth, low-noise output in robotics, laboratory automation, medical devices, AGV/AMR systems, and industrial automation.

Available in two body lengths — 22ZWWC48 and 22ZWWC64 — across six voltage and duty-cycle configurations, this slotless BLDC family delivers 38.24–100 W rated power, 20–25 mN·m rated torque, and no-load speeds up to 55,000 RPM, with optional precision or silent planetary gearbox configurations available for precision motion applications.

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Motor Characteristics

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Specification	Unit	22ZWWC48					22ZWWC64
Specification	Unit	18V	24V (S2)	36V	48V	24V (S1)	24V
Pole Pairs	-	1				2	1
Terminal Resistance, Phase-Phase	Ω	0.26	0.3	0.57	1	0.94	0.63
Terminal Inductance, Phase-Phase	mH	0.018	0.027	0.06	0.11	0.057	0.061
Winding Connection Method	-	Star Connection
Insulation Class	-	B
Duty Type	-	S2				S1	S2
Feedback Method	-	Hall Sensor
Commutation Angle	-	120°
Insulation Strength (Withstand Voltage)	-	500VAC/1KHz/1mA/1s
Insulation Resistance	-	100MΩ/500VDC
Weight	g	110					140
Rated Voltage	V	18	24	36	48	24	24
Rated Power	W	83	100	100	100	53	38.24
Rated Torque	mN·m	20				25	20
Rated Speed	RPM	40000	49000	47400	49600	20100	18200
Rated Current	A	7.95	4.68	3.12	2.29	3	1.86
No Load Speed	RPM	50000	55000	53000	54000	25700	19300
No Load Current	A	0.3	0.4	0.32	0.14	0.18	0.126
Motor Efficiency	%	87	89		91	81	89.7
Noise (Ambient 20dB, Test Distance 1m)	dB	<50
Thermal Resistance	K/W	12.6	11.9	11.5	12.8	12.2	9.8
Thermal Time Constant	S	648				620	1.86
Ambient Temperature	℃	21.4	22	24.7	21.1	24	22.3
Max Winding Temperature	℃	155				82	100
Torque Constant	mN·m/A	2.52	4.27	6.41	8.74	8.33	11.87
Back-EMF Constant, Peak Value	V/Krpm	0.37	0.63	0.95	1.29	1.23	1.758
Back-EMF Constant, Effective Value	V/Krpm	0.26	0.45	0.67	0.91	0.87	1.24
Peak Torque	mN·m	116.11	341.76	404.72	419.33	212.77	320
Peak Current	A	46	80	63	48	26	33.5
Rotor Inertia	g·cm²	1.15					3
Mechanical Time Constant	ms	4.72	1.89	1.60	1.51	1.56	1.34
End Bell	-	Stainless Steel
Bearing	-	Deep Groove Ball Bearing
Magnet	-	Sinter NdFeB
Rotation Shaft	-	Carbon Steel

Dimensional Drawing

Outline and dimensions apply across both body-length variants (22ZWWC48, 22ZWWC64) at a constant 22 mm diameter.

22 mm slotless BLDC motor dimensional drawing

Torque Performance Curves

Customization Options

The 22 mm Slotless Brushless DC Motor can be paired with a precision planetary gearbox to increase output torque and reduce output speed. Contact our engineering team for shaft, cable, and connector customization requests for this series.

Precision Planetary Gearbox

The 22 mm Slotless BLDC motor ships standard with the 22 mm gearbox below. DINGS' offers 10 precision planetary gearbox sizes from 6 mm to 42 mm — browse any size for reference.

6 mm size planetary gearbox dimensional drawing

Specification	Unit	Stage 1	Stage 2	Stage 3
Gear Ratio	X : 1	3.9	15	57
Max. backlash	°	1.8	2.0	2.2
Max. continuous output power	W	0.65	0.4	0.2
Max. peak output power	W	0.8	0.5	0.25
Max. continuous input speed	rpm	20000
Max. peak input speed	rpm	25000
Max. continuous torque	N·m	0.002	0.005	0.01
Max. peak torque	N·m	0.005	0.01	0.02
Max. efficiency	%	88	77	68
Weight	g	1.6	2	2.4
Gearbox length L	mm	4.7	7.2	9.7

8 mm size planetary gearbox dimensional drawing

Specification	Unit	Stage 1	Stage 2	Stage 3
Gear Ratio	X : 1	4	16	64
Max. backlash	°	1.8	2.0	2.2
Max. continuous output power	W	0.84	0.52	0.4
Max. peak output power	W	1.05	0.65	0.5
Max. continuous input speed	rpm	14000
Max. peak input speed	rpm	20000
Max. continuous torque	N·m	0.01	0.02	0.06
Max. peak torque	N·m	0.015	0.03	0.09
Max. efficiency	%	90	81	72
Weight	g	2.6	3.2	3.8
Gearbox length L	mm	5.5	8.1	10.7

10 mm size planetary gearbox dimensional drawing

Specification	Unit	Stage 1	Stage 2	Stage 3	Stage 4
Gear Ratio	X : 1	4.25	18	77	326
Max. backlash	°	1.5	1.8	2.0	2.2
Max. continuous output power	W	1.6	1.2	1.0	0.4
Max. peak output power	W	2	1.5	1.3	0.5
Max. continuous input speed	rpm	14000
Max. peak input speed	rpm	18000
Max. continuous torque	N·m	0.01	0.03	0.10	0.15
Max. peak torque	N·m	0.02	0.05	0.15	0.2
Max. efficiency	%	90	81	73	65
Weight	g	6.8	7.3	7.8	8.3
Gearbox length L	mm	10.1	13.6	17.1	20.6

12 mm size planetary gearbox dimensional drawing

Specification	Unit	Stage 1	Stage 2	Stage 3	Stage 4
Gear Ratio	X : 1	4.3	18.4	79	337
Max. backlash	°	1.2	1.5	1.8	2.1
Max. continuous output power	W	2.0	1	0.5	0.25
Max. peak output power	W	2.5	1.25	0.65	0.3
Max. continuous input speed	rpm	16000
Max. peak input speed	rpm	20000
Max. continuous torque	N·m	0.08	0.11	0.14	0.17
Max. peak torque	N·m	0.1	0.14	0.18	0.21
Max. efficiency	%	90	80	75	65
Weight	g	9	12	15	18
Gearbox length L	mm	11.3	15.1	18.9	22.7

14 mm size planetary gearbox dimensional drawing

Specification	Unit	Stage 1	Stage 2	Stage 3	Stage 4
Gear Ratio	X : 1	4.3	18.4	79	337
Max. backlash	°	1.1	1.3	1.45	1.7
Max. continuous output power	W	4.0	2.0	1.0	0.4
Max. peak output power	W	5.0	2.5	1.25	0.5
Max. continuous input speed	rpm	14000	16000
Max. peak input speed	rpm	18000	20000
Max. continuous torque	N·m	0.16	0.2	0.25	0.3
Max. peak torque	N·m	0.2	0.25	0.31	0.38
Max. efficiency	%	90	80	75	65
Weight	g	11	15	19	23
Gearbox length L	mm	11.8	16.1	20.4	24.7

16 mm size planetary gearbox dimensional drawing

Specification	Unit	Stage 1	Stage 2	Stage 3	Stage 4
Gear Ratio	X : 1	3.9, 5.3	16, 21, 28	62, 83, 111, 150	243, 326, 439, 590, 794
Max. backlash	°	1.0	1.2	1.3	1.4
Max. continuous output power	W	6.5	3.2	1.6	0.6
Max. peak output power	W	8.0	4.0	2.0	0.75
Max. continuous input speed	rpm	12000	14000
Max. peak input speed	rpm	15000	18000
Max. continuous torque	N·m	0.2	0.25	0.35	0.45
Max. peak torque	N·m	0.25	0.35	0.45	0.55
Max. efficiency	%	90	80	75	65
Weight	g	25	31	37	42
Gearbox length L	mm	18.7	25.5	30.2	35

22 mm size planetary gearbox dimensional drawing

Specification	Unit	Stage 1	Stage 2	Stage 3	Stage 4
Gear Ratio	X : 1	3.9, 5.3	16, 21, 28	62, 83, 111, 150	243, 326, 439, 590, 794
Max. backlash	°	0.85	1.05	1.2	1.35
Max. continuous output power	W	24	12	6.0	1.6
Max. peak output power	W	30	15	7.5	2.0
Max. continuous input speed	rpm	8000	10000
Max. peak input speed	rpm	10000	12500
Max. continuous torque	N·m	0.5	0.7	1.2	1.5
Max. peak torque	N·m	0.6	0.9	1.5	1.9
Max. efficiency	%	90	81	74	66
Weight	g	59	83	97	112
Gearbox length L	mm	22.3	33	39.6	46.3

28 mm size planetary gearbox dimensional drawing

Specification	Unit	Stage 1	Stage 2	Stage 3	Stage 4
Gear Ratio	X : 1	3.9, 5.3	16, 21, 28	62, 83, 111, 150	243, 326, 439, 590, 794
Max. backlash	°	0.5	0.6	0.7	0.75
Max. continuous output power	W	100	50	25	8.0
Max. peak output power	W	125	62	31	10
Max. continuous input speed	rpm	6000	7000
Max. peak input speed	rpm	7500	8750
Max. continuous torque	N·m	1.25	2.90	5.0
Max. peak torque	N·m	1.6	3.6	6.3
Max. efficiency	%	90	81	72	65
Weight	g	103	150	174	198
Gearbox length L	mm	24.2	36.9	43.5	50.2

36 mm size planetary gearbox dimensional drawing

Specification	Unit	Stage 1	Stage 2	Stage 3	Stage 4
Gear Ratio	X : 1	3.9, 5.3	16, 21, 28	62, 83, 111, 150	243, 326, 439, 590, 794
Max. backlash	°	0.5	0.6	0.7	0.8
Max. continuous output power	W	185	90	45	15
Max. peak output power	W	230	115	60	19
Max. continuous input speed	rpm	6000
Max. peak input speed	rpm	7500
Max. continuous torque	N·m	2.3	5.4	9.3
Max. peak torque	N·m	2.9	6.8	11.6
Max. efficiency	%	90	80	72	65
Weight	g	156	238	277	315
Gearbox length L	mm	30	44.7	51.3	58

42 mm size planetary gearbox dimensional drawing

Specification	Unit	Stage 1	Stage 2	Stage 3	Stage 4
Gear Ratio	X : 1	3.9, 5.3	16, 21, 28	62, 83, 111, 150	243, 326, 439, 590, 794
Max. backlash	°	0.3	0.4	0.5	0.6
Max. continuous output power	W	480	200	85	20
Max. peak output power	W	600	250	106	25
Max. continuous input speed	rpm	6000
Max. peak input speed	rpm	7500
Max. continuous torque	N·m	3.0	7.5	15
Max. peak torque	N·m	4.5	11.3	22.5
Max. efficiency	%	90	81	72	64
Weight	g	252	405	476	544
Gearbox length L	mm	36.1	54.9	63.6	72.4

Gear ratios shown above reflect standard stock configurations for each size. Additional gear ratios and stage combinations are available upon request — contact our engineering team to configure a custom reduction for your application.

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Downloads

Size 22 mm — 22ZWWC48 CAD

↓ 2D Drawing (PDF) ↓ 3D Drawing (STP)

General Resources

↓ General Catalog ↓Slotless BLDC Motor Catalog (PDF) ↓ Manual

Part Number Builder

22 ZWWC 48

22 mm motor diameter

ZWWC

Slotless (ironless-winding) brushless DC motor series

48 / 64

Body length designation, mm

Hall

Hall sensor feedback is standard

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Part Number	Rated Voltage	Duty Type	Rated Power	Rated Torque	Rated Speed
22ZWWC48	18 V	S2	83 W	20 mN·m	40000 RPM
22ZWWC48	24 V	S2	100 W	20 mN·m	49000 RPM
22ZWWC48	36 V	S2	100 W	20 mN·m	47400 RPM
22ZWWC48	48 V	S2	100 W	20 mN·m	49600 RPM
22ZWWC48	24 V	S1	53 W	25 mN·m	20100 RPM
22ZWWC64	24 V	S2	38.24 W	20 mN·m	18200 RPM

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22 mm Slotless Brushless DC Motor

Motor Characteristics

Dimensional Drawing

Torque Performance Curves

Customization Options

Precision Planetary Gearbox

Downloads

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