By half of the 1990-ies CPT has become more-and-more a highly productive industry. Operators make up to 14 tests of 25 meter per 8-hour shift. Strain-injuries in wrists and elbows are becoming a real issue and the industry asks for a newly designed thread. This resulted in the Quick-Lock thread (also called Speed-Lock thread).
The main advantages are the number of turns required to lock / unlock (only 2.5 turns), the improved strength of the thread (over 40% stronger than the STANDARD thread) and the relative ease to clean it.
Dimensions and Characteristics
Available (effective) lengths : 1,000, 500 and 300 mm
Outer diameter : 36 mm
Inner diameter : 16 mm
Weight : 6.5 kg/m
Length of the MALE thread : 37.5 mm
Outer thread diameter (top) : 25 mm
Outer thread diameter (base) : 30 mm
Required number of turns to lock / unlock : 2.5