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- Fastener Coatings
- Industries Served
"How much torque do I use with FluoroKote#1® coated fasteners?"
The answer is not a simple one.
Using a threaded connection (a bolt) instead of a solid and fixed connection (such as a rivet or weld) has long been a better way to bring and hold together two or more objects. Why? Three good reasons:
- Because of the spiral of the thread, the required tension can be easily achieved.
- Disconnection is quick, simple and inexpensive.
- Tools required for the make-up and breakout of the connection are elementary and readily available.
Friction becomes a problem during tightening and removal by increasing the amount of torque needed in both operations
Torque is defined as the measured ability of a rotating element to overcome turning resistance. FluoroKote#1® will reduce the torque significantly by lowering one of its components, the K factor, or torque coefficient. The fluoropolymer used in the final coat of FluoroKote#1® has a kinetic friction coefficient of 0.06-0.08. This figure is significant in that the reduced coefficient has a predominant effect on the K factor, lowering the required torque.
Calculating the correct torque to use is not a problem when nuts and bolts are used in applications with perfect conditions. However, the overwhelming majority are used in applications where the conditions are anything but perfect. Each application has its own unique conditions that influence the torque requirements. The amount of required torque can best be determined by experimentation within your application. Metal Coatings Corp can provide guidance when selecting the torque to use in any particular situation. Additional torque information is available upon request.
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