Defender Rotowinder

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A special purpose friction hinge.


  • For use with windows fitted with winding gear
  • Asymmetric location system for reliable weather sealing to BS 6375-1
  • Patented lipped slider for enhanced smooth operation
  • Easy friction adjustment without metal to metal contact
  • Unique patented, robust cam friction device eliminates any risk of friction screw misuse
  • Avaliable in 12" side hung


  • Tested to 30,000 cycles
  • Austenitic* stainless steel for enhanced corrosion resistance and strength
  • 12 Year Guarentee (details available upon request)

* Austenitic (was 304) stainless steel BS EN 10088-2 Grade 1.4301 for enhanced corrosion resistance.

Product Codes

Defender Rotowinder
Side Hung
Max vent
weight (kg)
Min vent
width (mm)
Max vent
width (mm)
Opening angle
(+/- 2.5°)
DS12W2-EXP 20 300 600 88°