Pin Drive roller kelly bushings

Product Details

Product Description

Product Description
Function: Work with master bushing to drive drill pipe
The pin Drive roller kelly bushing provides the following advantages:
**Pulling out or putting in string can be done while rotating
**Because of its integral construction,it can not fly out and hurts you;
**The bushing is easily installed into the master bushing, maintaining good alignment;
**The contact between kelly and roller is rolling contact,so friction is lower, and drill pressure is accurate

Type	kelly size	Rotary table	Drive hole Dia.	Center Distance of the Drive hole
	mm(inch)	mm(inch)	mm(inch)	mm(inch)
BFK-6F-B4	133.4(5-1/4'')	952.5(37-1/2'')	86.2(3-25/64'')	654(25-3/4'')
When ordering or requesting quotation, if size out of above specification, pls. specify clearly.

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