4KRVS Roller Kelly Bushings

4KRVS Roller Kelly Bushings

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 49.1/2inch rotary tables. They are designed and manufactured according to API Spec 7K.

 

 

Model

Type

Drive way

applicable size of kellyin

Square

Hex

HDS

Heavy duty

Square drive

21/2-6

3-6

27-HDP

Pin drive

21/2-6

3-6

20-HDP

21/2-6

3-6

RTM4

Medium duty

Square drive

21/2-51/4

3-41/4

RTS4

Light duty

21/2-41/4

3-41/4

 

 


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