Typical Test Results

Torque: is a measurement of force, in this case the force required to turn and tighten a fastener to secure a joint.
Tension: is a measure of stored energy or stretch induced in a fastener once it is tightened.
Coefficient of Friction: is a term used for describing the material surface conditions that determine toque-tension.

Most coatings designed for threaded fasteners, particularly in automotive applications, will need to meet demanding torque-tension requirements.

Due to the very unpredictable friction values of zinc based coatings, torque-tension modifiers are frequently employed, especially on fasteners. These products are usually applied as part of the finishing process to ensure consistent friction properties.

Many different automotive torque/tension standards currently exist, however most requirements can be met using one of MacDermid's 6 popular friction control fluids.

Achieving the correct tension in fasteners is vital if a joint of fixing is to remain secure under load, without compromising the strength or integrity of the fastener or joint.

The relationship between the Torque, Tension and CoF forces is an important factor in ensuring a fastener secures a joint with maximum force, whilst remaining below the fasteners designed failure point (proof load).

Most coatings adversely affect fastener friction and therefore the forces required to secure a joint. Torque N Tension Control Fluids from MacDermid, are designed to ensure both plated and organic coatings meet predetermined torque/tension standards irrespective of the underlying coating.

Products Include:
TNT Control Fluid
TNT Control Fluid UV
TNT 11
TNT 12
TNT 15
Maculube 9775
JS 600

Friction Range:
0.08 - 0.18 CoF

Features:
Water-based
Environmental, HSE and Toxicology tested

Application Modes:
Dip-spin
Curtain-coat
Barrel or Rack
Spray, Wash
Dunk & Drench