The SBD-A series safety brake
Application scope:
- The hydraulic safety (emergency) brake is a high-power braking device engineered for low-speed shafts (drum shafts). It is widely suitable for emergency safety braking of low-speed shafts in large and medium-sized cranes, port loading and unloading machinery, and boom luffing mechanisms. In addition, it serves as both the service brake and emergency safety brake for mining winches, hoists, and high-power inclined belt conveyors; as the dedicated safety brake for the drive mechanisms of cable cars and cable cranes; and as the safety (emergency) brake for low-speed shafts in the lifting mechanisms of special cranes (e.g., casting cranes).
Main design features:
-Normally closed design for superior safety and reliability; the disc spring-actuated braking system is specially engineered and requires a dedicated hydraulic release mechanism for disengagement.
-Rapid response and short brake engagement time.
-Can be fitted with an open-position limit switch and a brake pad wear limit switch, enabling interlock protection and fault indication functionality when integrated with a PLC control system.
-High-performance asbestos-free hard friction pads deliver a stable friction coefficient, cause no damage to the brake disc, and exhibit excellent insensitivity to water and salt spray (seawater) exposure.
-Optimized seal structure design with imported branded seals, ensuring exceptional sealing performance and an extended service life.
-Flexible mounting options, allowing for convenient operation, adjustment, and maintenance.
Model Designation Explanation
Overall Dimensions and Mounting Specifications
Installation diagram
Braking torque: M=μ × d1 × F (Nm)
In the formula: μ - Calculated friction coefficient μ=0.35
d1- Calculated friction diameter of the brake disc, d1=D-130(mm)
F-Total clamping force during braking (kN)
Note: 1) This formula applies to brake discs with a diameter ranging from 800 mm to 1800 mm.
For brake discs of other diameters, please contact us directly.
2) d2 is the maximum allowable outer diameter of the drum or connecting hub, d2=D-270(mm)
SBD-A series safety brake size and technical parameters
|
Product model |
Total clamping force |
Braking force |
Working pressure of oil cylinder |
Open valve oil volume |
Opening gap |
weight |
A(mm) |
C(mm) |
d1(mm) |
d2max |
D(mm) |
|
SBD100-A |
100 |
72 |
70 |
70 |
0.75-1.5 |
195 |
0.171×ΦD+220 |
0.470×ΦD-127 |
ΦD-135 |
ΦD-127 |
Φ800≤ΦD |
|
SBD125-A |
125 |
90 |
90 |
90 |
0.75-1.5 |
195 |
|||||
|
SBD160-A |
160 |
115 |
110 |
110 |
0.75-1.25 |
195 |
|||||
|
SBD200-A |
200 |
144 |
100 |
100 |
0.75-1.5 |
235 |
|||||
|
SBD250-A |
250 |
180 |
120 |
120 |
0.75-1.25 |
235 |
|||||
Note: The SBD□-A series safety brake is an updated variant of the original SBD series safety brake.
FAQ
01.Where is the SBD-A series safety brake manufactured?
It is manufactured in Henan, China.
02.What are the applicable ambient temperature and humidity ranges for the SBD-A series safety brakes? Is this product suitable for use in flammable and explosive environments?
The recommended ambient temperature range is -20 °C to +50 °C, with relative humidity ≤ 90%. This brake is not suitable for operation in flammable and explosive atmospheres.
03.How to select the specific model of the SBD-A series safety brake for a given piece of equipment?
Selection shall be based on the following key parameters of the equipment's low-speed shaft: rated torque, brake disc diameter (within the range of Ø 800 mm–Ø 1800 mm), operating frequency, and maximum braking load. Users can refer to the Model-Torque-Disc Diameter Correlation Table in the product specification sheet, or provide detailed equipment parameters to the manufacturer's technical team for professional model-matching support.
04.Is the SBD-A series brake compatible with lifting equipment of different brands?
This series is compatible with most mainstream brands of lifting equipment, provided that the installation dimensions of the equipment's low-speed shaft (e.g., shaft diameter, brake disc mounting spacing) match the brake's interface specifications. Prior to installation, it is essential to verify that the equipment's interface parameters are consistent with those of the brake.
05.What are the possible causes of abnormal noise during braking, and how to resolve such issues?
Common causes include excessive wear of brake pads (with uneven surface conditions), scratches or oil contamination on the brake disc, and loose internal brake components.Solutions:Inspect the thickness of the brake pads and replace them if the wear exceeds the specified limit.Clean any oil contamination on the brake disc surface; polish the disc if scratches are shallow, or replace it entirely if scratches are deep.Tighten any loose internal components such as bolts and pins.
06.What is the maintenance interval for the SBD-A series brakes, and what maintenance tasks are required?
The standard maintenance interval is once every 3 months. For high-frequency operating conditions (i.e., daily operating time exceeding 8 hours), monthly maintenance is recommended.
Required maintenance tasks are as follows:
Inspect the thickness of brake pads; replace them if the remaining thickness is less than 3 mm.
Clean the surface of brake discs and brake pads to remove dust and contaminants.
Check the sealing performance of hydraulic pipelines for leaks.
Replenish hydraulic oil when the oil level falls below the minimum mark on the oil gauge.
Inspect the appearance and elasticity of disc springs for deformation or fatigue.
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