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Roller Kelly Bushing
Source:SIQUAN|[ 2014-03-12 ] Hits:1349
摘要:
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 kelly(in) 
Square  Hex 
HDS Heavy duty Square drive 2.1/2-6 3-6
27-HDP Pin drive 2.1/2-6 3-6
20-HDP 2.1/2-6 3-6
4KRVS Medium duty Square drive 2.1/2-5.1/4 3-4.1/4
4KRBM Light duty 2.1/2-4.1/4 3-4.1/4
 
 
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