Hollow hydraulic wrench maximize the use of high-strength light metal, forming one power head, and comprehensively improve the strength and life; greater torque / weight ratio, double acting, high-speed, angle, high efficiency, a power head can be used with more kinds of work the first use of a wide range of work, 360 ° × 360 ° rotating hose connector allows use in tight spaces easy and will not be stuck there body, torque repeatability up to ± 3%, when no other release tools, storage boxes protect the wrench head to avoid damage, flooding and pollution, fewer moving parts, durable, easy to maintain. 

 The hollow hydraulic wrench wrench, small size, torque, preload accurate. It is widely used in metallurgy, electric power, chemical, mechanical, telecommunications and other industries of machinery and equipment and facilities, it is important to install and remove bolt connection maintenance, can be done quickly and easily to your bolt assembly and disassembly tasks, while you need to ensure effective torque value. Model specifications YK30 YK60 YK90 YK120 
 Maximum torque (NM) 2900 5000 13000 24000 
 Cylinder diameter mm 30 35 40 45 
 Rated pressure Mpa 100/10 100/10 100/10 100/10 
 Nut on the side of S (mm) 32-55 46-80 85-105 110-145 
 Bolt diameter M (mm) M22-M36 M30-M52 M56-M72 M76-M100