JW Winco introduces safety lobed knob
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JW Winco product story
Edited by the Engineeringtalk editorial team
Feb 4, 2009
JW Winco has introduced the RoHS-compliant GN 5337.3 series plastic safety lobed knob, which contains a steel tapped insert.
The hand knob is made of a glass-fibre reinforced technopolymer plastic with a black matte finish.
The tapped insert, screw and spring are made of steel in a black oxide finish.
The moulded-in inlay is zinc die-cast.
The knob is available in metric and inch sizes and is suited for applications where unintended loosening of the knob can cause accidents.
In non-operative mode, the lobe knob is not engaged with the tapped insert, so it can be easily turned.
Only after axial pushing of the knob does it engage with the insert, allowing the knob to be tightened or loosened.
After release, a spring disengages the serrations.
The five-lobe design allows the operator to achieve higher torque.
The knob is temperature-resistant to 130C.
It is also resistant to solvents, oils, grease and other chemical agents.
Versions with stainless steel inserts or with coloured cover-caps are available upon request.
Other modifications are available, including cross holes, set screw holes and threaded studs.
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