Double intermediate Twistlock: T-12 for Windmill Transport

Double intermediate Twistlock: T-12 for Windmill Transport

Wind turbines along with their blades are very large, heavy, and expensive to transport. If you're transporting them by traditional means, the fastest and most cost-effective route is usually chosen. Over the past years, hundreds of windmill components have been secured by Contech materials. The double twistlock T-12 ensures faster loading of Windmill cargo and and an increased loading capacity. In this blog, we tell you more about the operation, maintenance, and repair Instructions of double intermediate twistlock: T-12.


The double intermediate twistlock is used for securing 2 windmill frames and at the same time to connect 2 stacks with each other.

Double twistlock T-12


Step 1:

Align the lower cones with the twistlock body (Picture 1)
Both levers are in the mid-position as indicated on the right figure.

Double twistlock operation Step-1

Step 2: 

Insert the double twistlock in the lower containers. (Picture 2)

Double twistlock operation Step-2

Step 3:

Align the top cones with the body’s (Picture 3)
Both levers are in the right position, top cones are now open.

Double twistlock operation Step-3

Step 4: 

Lowering top containers (Picture 4)

Double twistlock operation Step-4

Step 5: 

Lock the twistlocks (Picture 5)
Shift both levers to the left position.

Double twistlock operation Step-5

Maintenance of the T-12 double twistlock:

It’s recommended to inspect and clean the double twistlock on a regular basis. This includes greasing the movable parts and checking the functioning of the mechanisms and spring action. Twistlocks with damaged cones or bodies are to be scrapped. Other damaged elements (bolts, spring,.. ) can be replaced as described in the repair instruction.


By removing the bolts and nuts, the body halves can be separated. Cone assembly, spring and ball can be removed.

Spare parts:

  • Bolt M10 x 40mm
  • M10 nut

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