17.5inch Tower Crane Mast Alloy Steel Master Bushing for Construction

The master bushings and insert bowls with the size from 17.5 to 37.5" ,They are cast with high-quality alloy steel and the sizes conform to API Spec 7K. There are two types : pin drive and square drive. API standard rotary slip, drill collar slip ,casing slip or roller Kelly bushing can be contained in them .

Wuxi Ketong Engineering Machinery Manufacture Co., Ltd located in Zhangjing industrial development zone in Wuxi city of Jiangsu Province, China, is a high-tech enterprise in manufacturing and exporting construction machinery. Our brand is KETONG. Our company is also the intergration company who make design, manufacture, sales, and installation of the high operation working construction equipment. And have good reputation all over the world.
With innovative technology, profect inspection methods, advanced and complete processing equipment, strictly and safely quality management system, our company sincerely offer you high quality products and good after-sales services.

 We have 5 series products: Tower crane , roof crane, construction hoist , construction gondola ,gantry cranes ets ,products are mainly export. Our products are exported to the United States ,Russia ,Brazil,Vietnam,Philippines,Malaysia,India,Pakistan, United Arab Emirates,Kuwait,Saudi Arabia ,Bahrain,Chile,Iran,Columbia,Venezuela,Algeria,Kazakhstan More than 20 countries and most domestic provinces .

  The company always insists on management policy of honesty,quality first,scientific management,brand and excellent after sales services Ketong company helps you to ease your problem in high rise services.