Tube clamping usually has 2 types: 2-half type and collet type.
2-half type tube clamping can be used to clamp the drill tube with 0.D. more than 20mm, and the driltube is clamped with a reduction sleeve collet.
Collet type tube clamping is usually used to clamp drill tube with 0.D. less than 47mm, and matchesthe collet according to the drill pipe diameter.Generally the un-supported length of drill tube not more than 30-40 times of the tube OD.
