Manual twistlocks CV-8, CV-8G Manual twistlock The MacGregor CV-8 and CV-8G bottom twistlocks are designed to handle the large forces and wear that occur at the bottom of a container stack. In accordance with Germanischer Lloyd’s rules for higher pressure forces, the CV-8G bottom twistlock housing is designed with a larger wear surface. Bottom twistlocks are used on the bottom corners of containers sitting on hatch covers, pedestals and deck extensions. At sea, these twistlocks incur longitudinal forces caused by torsional deformations of the ship’s hull. These longitudinal forces have to be addressed by either incorporating sliding foundations or by using ISO standard twistlock foundations, which have an elongated ISO hole. When torsional deformation occurs the containers will slide on the pedestals, causing wear to the base of the twistlocks. When the forces and the torsional deformation are large the wear can be excessive. In worst case scenarios, the forces and wear can cause cracking and finally failure of the bottom twistlocks during a voyage. MacGregor CV-8 and CV-8G bottom twistlocks fulfil all safety criteria and outperform others in this tough environment. The CV-8 series of bottom twistlocks are designed for active duty and are easy to operate with a manual locking handle. To best match your vessel’s needs, the CV-8 series of manual twistlock are available in three different models: the standard CV-8; the CV-8G with an enlarged wear surface; and the CV-8B with an extra large wear surface and built-in wear indicator. Both the CV-8 and CV-8G units have lefthand locking mechanisms. CV-8 Order number 1070783 1108154 1108155 1020835
1065830
54
Product CV-8R CV-8R-Z CV-8-Z CV-8
CV-8G
Weight kg
Shaft material
5.1
Forged high tensile steel
4.9
Forged high tensile steel
4.9
Forged high tensile steel
4.7
Forged high tensile steel
5.6
Forged high tensile steel
Housing material
Treatment
Precision cast steel
Hot-dip galvanised
Precision cast steel
Hot-dip galvanised
Precision cast steel
Hot-dip galvanised
Precision cast steel
Hot-dip galvanised
Precision cast steel
Hot-dip galvanised
Safe Working Load Tension, kN 250 250 250 250
250
Safe Working Load Shear, kN
Details
210
Manual, for bottom tiers, right Container castings, hand locking twistlock foundations
MacGregor
210
Manual, for use with cellguides, right hand locking
Container castings, twistlock foundations
MacGregor
210
Manual, for use with cellguides, left hand locking
Container castings, twistlock foundations
MacGregor
210
Manual, for bottom tiers, left hand locking
Container castings, twistlock foundations
MacGregor
210
Manual, for bottom tiers, left hand locking, wider housing for higher pressure forces
Container castings, twistlock foundations
MacGregor
Counter part
Design