Rope threads have a low pitch and a small angle of profile
Good wear properties but poor uncoupling capability Ideal for single pass or short hole drilling such as underground tunneling applications that require infrequent uncoupling
Rope thread larger than R32 is not recommended for extension drilling, especially with high powered drills that have high rotational torque as they will be difficult to uncouple.

Available sizes
R32 x 3m
R38 x 3m
R51 x 3m