Product Features 
1) Compliance with API 7K specification. 
2) Industry standard SY/T5531 requirements. 
3) Wheel drive using spiral bevel gears, strong bearing capacity, smooth operation and long life. 
4) Wheel shell welding structure, good rigidity, high accuracy. 
5) Splash lubrication of gears and bearings 
6) Overall master bushing is steel castings. 
7) Pin drive type can be placed in API standard Kelly or hexagonal Kelly roller bushing, long, short kava can be used.

Model		ZP375	ZP275	ZP205	ZP175
The maximum hook load load	kN	5850	4500	3150	2250
	US ton	650	500	350	250
Inside diameter	mm	952.5	698.5	520.7	444.5
	in	371/2	271/2	201/2	171/2
Gear ratio		3.56	3.67	3.22	3.58
The distance from the axis to the center of the turntable to the   sprocket	mm	1353	1353	1353	1118
	in	531/4	531/4	531/4	44
	mm	2468*1810*718	2392*1670*685	2392*1475*668	1935*1280*585
Size	in	97*71*28	94*66*27	90*58*26	76*50*23
Weight	kg	8026	6203	5530	3888
	lb	17694	13680	12190	8572