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Ultra‑Thin Spring‑Applied Brake

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Ultra‑Thin Spring‑Applied Brake

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Certification :	CE ROHS
Model Number :	6700、6701 6705 6706
Brand Name :	SENINTER

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Ultra‑Thin Spring‑Applied Brake

Technical Parameters

Model No.	Static Torque (N·m)	Over-excitation Output				Steady Excitation Output				Thermal Class	Max. Speed (r/min)	Moment of Inertia J (kg·m²)	Allowable Single Brake Work E₀ₐ (J)	Total Brake Work E_T (J)	Pull-in Time tₐ (ms)	Release Time tₐᵣ (ms)	Weight (kg)
		Voltage (V)	Power (W)	Current (A)	Resistance (Ω)	Voltage (V)	Power (W)	Current (A)	Resistance (Ω)
25SLE	0.1	24	14	0.58	41.14	7	1.191	0.17	41.14	F	6000	8.89×10⁻⁸	0.17	34	40	25	0.03
35SLE	0.2	24	12	0.5	48	7	1.02	0.146	48	F	6000	9.60×10⁻⁷	1.9	380	80	40	0.06
40SLE	0.5	24	16.5	0.688	34.91	7	1.404	0.2	34.91	F	6000	1.50×10⁻⁶	2.9	580	80	40	0.12
45SLE	1	24	16	0.67	36	7	1.36	0.194	36	F	6000	5.00×10⁻⁶	9.8	1960	80	40	0.16
50SLE	2	24	24	1	24	7	2.041	0.29	24	F	6000	5.00×10⁻⁶	9.8	1960	80	40	0.2
100SLE	3	24	31	1.291	18.58	7	2.637	0.377	18.58	F	6000	1.20×10⁻⁵	23	4600	120	60	0.6
110SLE	5	24	30	1.25	19.2	7	2.552	0.364	19.2	F	6000	2.30×10⁻⁵	45	9000	120	60	0.8
130SLE	8	24	24	1	24	8	2.67	0.33	24	F	6000	1.80×10⁻⁴	356	71200	120	60	1

Model No.	Radial Dimension								Axial Dimension					Rotor Machining Size
	A Outer Dia.	B Mount Position Dia.	C Inner Bore	D Cover Inner Bore	dmax Shaft Hole	F Square Flat	S Notch Width	V Mount Hole	H Mount Thickness	K Stator Thickness	N Air Gap	a Square Thickness	L Square Thickness	D2 Outer Circle	F2 Square Flat	dmax Shaft Hole
25SLE	39	33	16	18	/	12	5	2.2	/	9	4.5	0.1	/	15	12	/
35SLE	48	44	26	28	/	16	5.5	2.7	/	9	4.5	0.1	/	18	16	/
40SLE	56	50	26	28	/	19	5.5	2.7	/	9	4.5	0.1	/	24.5	19	/
45SLE	66	61	34	37	/	24	6.5	3.4	/	10	5	0.1	/	26	24	/
50SLE	71	65	37	37	/	28	6.5	3.4	/	13	6	0.1	/	36	28	/
100SLE	83.5	76	43	47	28	35	10	4.5	/	15	7.9	0.2	≥4	42	35	28
110SLE	93.5	86	47	61.6	30	38	10	4.5	/	16	8	0.2	≥4	46	38	30
130SLE	123.5	115	65	83	36	45	10	4.5	/	18	9	0.2	≥4	55	45	36

Ultra‑Thin Spring‑Applied Brake

Only 8mm Thin – Purpose‑Built for Robot Joint Rotary Actuators

Why Do Rotary Actuators Need an Ultra‑Thin Spring Brake?

Rotary actuators in humanoid robots (shoulders, elbows, wrists) must lock instantly upon power loss or emergency stop to prevent unintended joint rotation, while releasing quickly when powered to maintain smooth motion. Conventional brakes, however, typically exceed 15mm in thickness—significantly crowding joint axial space, increasing overall length and weight, and restricting biomimetic design.

Our Ultra‑Thin Spring‑Applied Brake, with a minimum thickness of just 8mm, delivers an extremely compact braking solution for rotary actuators—reliable holding within limited space, without compromising torque or response speed.

Key Product Advantages

1. Extreme Thinness – As Slim as 8mm

Compared to conventional spring brakes (typically >15mm thick), our product achieves nearly 50% thickness reduction. For a humanoid robot with 15–20 braking joints, this translates into over 100mm of total axial length savings—freeing up valuable space for sleeker, more anthropomorphic designs.

2. Optimized for Rotary Actuators

Specifically engineered for robotic rotary joints that demand high‑frequency start‑stop and bidirectional rotation, the brake features optimized response time, release delay, and wear resistance—ensuring reliable performance under high‑speed rotation and frequent braking.

3. Lightweight – Reducing Joint Inertia

Through structural optimization and lightweight materials, we achieve minimal weight without sacrificing braking torque. Lower joint inertia translates into quicker start‑stop response, reduced energy consumption, and extended battery life.

4. Spring‑Applied – Fail‑Safe Power‑Off Locking

Designed with spring‑applied braking, electrically released (fail‑safe) mechanism, the brake automatically locks upon unexpected power loss—eliminating joint runaway risk, a core safety requirement for humanoid robots.

5. Low Noise & Long Service Life

Optimized friction materials and braking surfaces ensure low acoustic noise, suitable for quiet service robot environments. Braking pads are durability‑reinforced, supporting hundreds of thousands of cycles with extended maintenance‑free intervals.

Application Scenarios – Full Coverage for Rotary Actuators

Joint Application	Key Value
Shoulder rotation	Ultra‑thin design saves axial space, enabling more natural shoulder contouring
Elbow joint	Lightweight construction reduces arm inertia for faster, more agile grasping
Wrist rotation	Slim profile frees up precious wrist space for force sensor integration
Waist rotation	Reliable locking prevents torso tilt during standby

Comprehensive Benefits Over Conventional Brakes

Axial space savings: Thickness reduced from 15mm+ to 8mm – more compact joints, slimmer overall robot
Weight reduction: Tens of grams saved per joint – cumulative effect significantly improves energy efficiency
Simplified assembly: Standardized mounting interface – quick installation without complex adjustments
Enhanced safety: Fail‑safe power‑off locking meets humanoid robot safety standards

Customization Services – Tailored to Your Joint Architecture

Every humanoid robot has unique spatial and load requirements. We offer flexible customization options:

Thickness: Adjustable within 8–15 mm range
Torque: Tailored to your joint load demands
Mounting interface: Customized to fit different actuator flanges
Voltage: Multiple voltage options available

From selection to mass production, we provide full technical support to accelerate your product development.

Key Technical Specifications

Parameter	Specification
Minimum thickness	8 mm
Braking mechanism	Spring‑applied (power‑off locking) / electrically released
Standard voltage	24V DC (customizable)
Application	Robot rotary actuators
Acoustic noise	Low‑noise design
Service life	Hundreds of thousands of cycles – maintenance‑free

For detailed 2D/3D drawings, sample testing, or technical consultation, please contact us anytime.

Ultra‑Thin Spring‑Applied Brake

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