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Kelly bar damping spring
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KELLY DAMPING SPRING
Damping spring is the accessories of the kelly bar parts. the function is to protect the kelly bar and damping , the material is 60Si2Mn .
It is easy to break during using kelly bar .
Different kelly bar is matched different Model ,such as :
45*330*400
55*390*400
50*400*410
55*420*420
70*480*480 .etc
Can supply spring based on kelly bar size or customized type.
(as different machine)
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