Main feature：

Double function swivel consists of housing, stem, packing unit, air motor, gooseneck and elevator bail etc. The stem is connected to housing through bearings and upper and lower caps. Its lower end of the stem is connected to drill pipe, and upper end to packing unit device. The bail is connected to housing by bail pin and hanged at hook. The gooseneck is installed on the top of upper cover, its out end is connected to rotary hose. In order to let the mud flow from the gooseneck to the stem and sealed properly, there is a packing unit installed between them. Air motor is installed on the upper cover, drive the stem rotate through air control friction clutch and gear reducer to realize spinning function. 

Equipped with standard elevator bail and double pin alloy steel subs. 

Main technical parameters：

Model		SL135	SL225	SL450
Max. static load (kN)		1350	2250	4500
Max. speed( r/min)		300	300	300
Max. working pressure (Mpa)		35	35	35
hook clearance (mm)		495	540	549
Inside diameter of stem (mm)		64	75	75
Connector (sub) thread	To stem	4 1/2REG LH	6 5/8REG LH	7 5/8REG LH
	To kelly	6 5/8REG LH	6 5/8REG LH	6 5/8REG LH
	Pipe threads Between gooseneck and rotary hose	4"-8" threads	4"-8" threads	4"-8" threads
Overall size （ L×W×H ） mm		2505×758 ×840	2880× 1046 × 1065	3115 × 1143 ×990