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Roller kelly bushings can be classed as two types based on different ways of drive,square drive and pin drive.
Also they can be classed as three types based on different style,heavy,medium and light-duty.
They are used for 17 1/2" to 49 1/2 in rotary tables.
HDS roller kelly bushings,4KRBM roller kelly bushings,HDP roller kelly bushings,4KRVS roller kelly bushings.
They are designed and manufactured according to API Spec 7K.
Please see attached parameters.
More informations,please call me.
Packing : PLYWOOD BOX
Delivery Lead Time : 30days
Minimum Order : 1 pc
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Business Registry Number: 120-86-03931