~We are one of the top 3 factories from China which specialize in manufacturing hydraulic breakers and their spare parts. We have two brands "STB" and "WYB", "STB" is mainly aiming at high-end market, "WYB" is mainly aiming at middle-end market. We are sincerely seeking reliable and professional dealers all over the world.

WYB/STB-68 SERIES PRODUCT DESCRIPTION
Applicable Excavator: 4-7 ton
Gross Weight: 295 kg
Main Body Weight: 151 kg
Required Oil Flow: 40-70 l/min
Set Pressure: 170 bar
Operating Pressure: 110-140 bar
Impact Rate: 500-900 bpm
Tool Diameter: 68 mm
Tool Length: 700 mm
Impact Energy: 70 kg.m

WYB/STB-75 SERIES PRODUCT DESCRIPTION
Applicable Excavator: 6-9 ton
Gross Weight: 375 kg
Main Body Weight: 210 kg
Required Oil Flow: 50-90 l/min
Set Pressure: 180 bar
Operating Pressure: 120-150 bar
Impact Rate: 400-800 bpm
Tool Diameter: 75 mm
Tool Length: 750 mm
Impact Energy: 92 kg.m

WYB/STB-100 SERIES PRODUCT DESCRIPTION
Applicable Excavator: 11-15 ton
Gross Weight: 861 kg
Main Body Weight: 471 kg
Required Oil Flow: 80-110 l/min
Set Pressure: 210 bar
Operating Pressure: 150-170 bar
Impact Rate: 350-700 bpm
Tool Diameter: 100 mm
Tool Length: 1000 mm
Impact Energy: 214 kg.m

WYB/STB-135 SERIES PRODUCT DESCRIPTION
Applicable Excavator: 18-21 ton
Gross Weight: 1500 kg
Main Body Weight: 754 kg
Required Oil Flow: 100-150 l/min
Set Pressure: 230 bar
Operating Pressure: 160-180 bar
Impact Rate: 350-600 bpm
Tool Diameter: 135 mm
Tool Length: 1200 mm
Impact Energy: 363 kg.m

WYB/STB-140 SERIES PRODUCT DESCRIPTION
Applicable Excavator: 20-26 ton
Gross Weight: 1825 kg
Main Body Weight: 911 kg
Required Oil Flow: 120-180 l/min
Set Pressure: 220 bar
Operating Pressure: 160-180 bar
Impact Rate: 350-500 bpm
Tool Diameter: 140 mm
Tool Length: 1300 mm
Impact Energy: 429 kg.m

WYB/STB-155 SERIES PRODUCT DESCRIPTION
Applicable Excavator: 28-35 ton
Gross Weight: 2635 kg
Main Body Weight: 1283 kg
Required Oil Flow: 180-240 l/min
Set Pressure: 240 bar
Operating Pressure: 160-180 bar
Impact Rate: 300-450 bpm
Tool Diameter: 155 mm
Tool Length: 1500 mm
Impact Energy: 663 kg.m

WYB/STB-165 SERIES PRODUCT DESCRIPTION
Applicable Excavator: 30-40 ton
Gross Weight: 2850 kg
Main Body Weight: 1443 kg
Required Oil Flow: 200-260 l/min
Set Pressure: 240 bar
Operating Pressure: 160-180 bar
Impact Rate: 250-400 bpm
Tool Diameter: 165 mm
Tool Length: 1600 mm
Impact Energy: 918 kg.m

WYB/STB-175 SERIES PRODUCT DESCRIPTION
Applicable Excavator: 40-55 ton
Gross Weight: 3990 kg
Main Body Weight: 1924 kg
Required Oil Flow: 210-290 l/min
Set Pressure: 240 bar
Operating Pressure: 160-190 bar
Impact Rate: 200-350 bpm
Tool Diameter: 175 mm
Tool Length: 1600 mm
Impact Energy: 1224 kg.m