entire-length is heat treatment, the accuracy and mechanism reach advanced world standard.

RQ series Rod parameter-NC lathe with former cutters
Spec.	Unit	BRQ	NRQ	HRQ	PRQ
OD/ID	mm	55.6/46	69.9/60.3	88.9/77.8	114.3/101.6
Length	m	1.5 or 3	1.5 or 3	1.5 or 3	1.5 or 3
Weight	kg/m	6.01	8.8	11.51	17.3
thread length	mm	42	42	41.91	63.5
thread pitch	thread/inch	3	3	3	2.5
box thread tooth height	mm	0.76	0.76	0.76	1.17
pin thread tooth height	mm	0.88	0.88	0.88	1.27
thread tooth negative angle	.	5	5	5	5
tensile resistance(A)	kn	450	525	545	565
tensile resistance(B)	kn	530	625.5	602	660
bore depth	m

wireline core drill pipe