Crane Safety brake
Crane Safety brake - Image 2
Crane Safety brake - Image 3
Crane Safety brake - Image 4
Crane Safety brake - Image 5
Crane Safety brake - Image 6
Crane Safety brake - Image 7

Crane Safety brake

SB Series Crane Safety Brake:

  • Product Models: SB50, SB100, SB160, SB250, SB315, SB400, SB500
  • Applicable Disc Diameter (mm): 500, 600, 1200, 1800
  • Brake Disc Thickness (mm): 30, 36, 40
  • Clamping Force F (KN): 50–500
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Hydraulic Safety Emergency Brake

The SB series crane safety brake are high-power braking devices specifically designed for low-speed shafts, such as drum shafts. These brakes are widely used for emergency safety braking in medium and large cranes, port handling machinery lifts, and boom tilting mechanisms. Moreover, they are ideal for the operational and emergency safety braking of mining hoists, lift equipment, and high-power inclined belt conveyors. They also serve as essential safety brakes in cable car and cable crane drive mechanisms. In addition, these brakes provide emergency braking for the low-speed shafts of hoist mechanisms in special lifting applications, such as casting cranes.

Main Features of Crane Safety Brake

  • Designed with a normally closed structure, these brakes are both safe and reliable. The braking force is applied through a specially designed disc spring, while hydraulic power is used to release the brake (for hydraulic station selection, refer to the hydraulic station catalog).
  • Additionally, the brakes come equipped with high-performance, asbestos-free hard friction pads. These pads offer a stable friction coefficient, preventing damage to the brake disc. They are also resistant to water and salt fog (sea spray), ensuring reliable operation in challenging environments.
  • The brakes are highly responsive, with short closing (braking) times, ensuring quick reaction in emergency situations.
  • To further enhance functionality, optional switches such as release limit and pad wear limit switches are available. These switches provide signal displays or interlock protection, improving overall safety.
  • Furthermore, a well-designed sealing structure, along with premium imported seals, ensures effective sealing and extends the brake’s service life.
  • Thanks to their flexible installation options, these brakes are easy to use, adjust, and maintain, providing long-term operational efficiency.

Operating Conditions

  • Ambient Temperature: These brakes function optimally within a temperature range of -20°C to +50°C.
  • Relative Humidity: The brakes are effective when the relative humidity is ≤90%.
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Dimensions and technical data

Technical data of SB series safety brake
Type Clamp force F
(KN)		 Release pressure
(MPa)		 Releaseoil
volume
(ml)		 Clearance
(mm)		 Friction coefficient Mounting bolts bolts/performance
class/Installation torque		 Weight
bracket excluded
(kg)
Static Dynamic
SB50 50  1  30  1-2 0.4  0.36  8-M20、10.9、550±10 90 
SB100 100  12  50  1-2 0.4  0.36  8-M24、10.9、950±10 150 
SB160 160  12  70  1-2 0.4  0.36  8-M30、10.9、1900±20 310 
SB250 250  16.5  95  1-2 0.4  0.36  8-M36、10.9、3300±40 452 
SB315 315  17  115  1-2 0.4  0.36  8-M36、10.9、3300±40 672 
SB400 400  16.5  170  1-2 0.4  0.36  8-M48、10.9、7500±100 1100 
Brake torque Nm=F×μ×d1 
    Type A  a1 a2 a3  b1 b2 B C d k P L E W H H1
 SB50   77   77  90  38   38  38  154  150  20.5  56  102  300  240   110  310  80 
 SB100 95   95  105  45   55  45  190  180  25  71  102  348  286   140  360  85 
SB160  110   120  135  65   70  65  260  235  31  87  106  412  370   170  410  95 
SB250  130   120  160  75   80  75  300  275  37  87  106  456  370   170  470  110 
 SB315  140   175  205  85   90  82.5  335  330  37  137  106  476  410   270  500  110 
 SB400  170   180  220  120   110  110  440  420  50  137  142  602  546   270  560  115 
SB500  170   180  220  120   110  110  440  420  50  137  142  682  542   270  600  115 
Relative Dimensions of brake disc(mm)
Type b D d1 d2 max
SB50 30  36  40  ≥500 D-120 D-300
SB100 30  36  40  ≥500 D-150 D-380
SB160 30  36  40  ≥600 D-180 D-440
SB250 30  36  40  ≥600 D-180 D-480
SB315 30  36  40  ≥1200 D-280 D-600
SB400 30  36  40  ≥1800 D-280 D-660
SB500 30  36  40  ≥1800 D-280 D-660
d1=the theoretical friction diameter,      d2=max .allowable drum or hub diameter
D:For other disc diameters please contact us

 

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