Roller Kelly Bushings

1Model:HDS,HDP,M4,MDP,S4;
2Size:17 1/2-49 1/2 inch;
3Good service;
4.API Spec 7K

Roller Kelly Bushings:
1.Our company produce the Roller Kelly Bushings are used for 17^1/2 to 49^1/2 inch.Rotary tables.
2.Roller Kelly Bushings are designed and manufactured according to API Spec 7K.
3.Roller Kelly Bushings have type:Heavy,Medium,Light-duty
4.Suitable for Kelly:Square(in),Hex.(in)

The details are as bellow:

Model	Type	Way of driver	Suitable for Kelly
Model	Type	Way of driver	Square(in)	Hex.(in)
HDS	Heavy	Square Drive	3-6	3-6
27-HDP		Pin Driver	3-6	3-6
20-HDP		Pin Driver	3-6	3-6
M4	Medium	Square Drive	2^1/2-5^1/4	3-4^1/4
20-MDP		Pin Driver	2^1/2-4^1/4	3-4^1/4
17-MDP		Pin Driver	2^1/2-4^1/4	3-4^1/4
S4	Light-duty	Square Drive	2^1/2-4^1/4	3-4^1/4