For Continuous Annealing Lines (CAL), Continuous Galvanizing Lines (CGL), and Color Coating Lines (CCL), the operational focus shifts from heavy deformation to precise tension control, high-speed strip tracking, and chemical resistance.
Here is a consolidated list of applications where our Nu-Teck Couplings' power transmission products — Gear, Grid, Tyre, Pin & Bush, and Chain Couplings, as well as Sprockets — are vital in these processing lines.
Application-wise coupling reference for all critical drive points across CAL, CGL, and CCL lines, grouped by process section
| Application | Nu-Teck Couplings | Description |
| Entry & Strip Preparation Section | ||
| Pay-off Reel (Uncoiler) | Gear Couplings | Handle the high starting torque and constant back-tension required to feed the strip into the line. |
| Entry Shear Drive | Pin & Bush Couplings | Manage the intermittent shock loads when cutting the head and tail of coils. |
| Entry Stitcher / Welder | Sprockets & Chain | Facilitate the mechanical clamping and positioning of strip ends for joining. |
| Entry Looper (Accumulator) Winch | Gear Couplings (Heavy-Duty) | Drive the winch drums that move the looper car to maintain continuous flow. |
| Cleaning & Pre-treatment Section | ||
| Scrubber Brush Rolls | Tyre Couplings | Ideal to absorb vibrations from the abrasive brushing action on the strip surface. |
| Degreasing Tank Pumps | Chain Couplings | Provide a simple, corrosion-resistant connection for pumps circulating alkaline cleaning solutions. |
| Squeegee & Wringer Rolls | Pin & Bush Couplings | Synchronize these rolls to ensure uniform removal of liquids without slippage. |
| Furnace & Coating Section (CAL / CGL) | ||
| Furnace Hearth Rolls | Gear Couplings (High-Temp) | Drive the rolls that support the strip through the annealing furnace at temperatures up to 900°C. |
| Zinc Pot Sink Roll Drive | Gear Couplings (Ext. Spacer) | Drive the submerged rolls that coat the strip in molten zinc — spacer keeps coupling outside splash zone. |
| Air Knife Blower Motors | Grid Couplings | Provide excellent high-speed stability and vibration damping for the blowers that control coating thickness. |
| Pot Rig Positioning | Sprockets & Chain | Used for the vertical and horizontal adjustment of the snout and pot equipment. |
| Coating & Curing Section (CCL) | ||
| Coater Head Rolls (Pick-up / Applicator) | Precision Gear Couplings | Ensure zero-velocity variation to prevent ribbing or uneven paint application on the strip surface. |
| Curing Oven Exhaust Fans | Grid Couplings | Protect fan motors from the high thermal expansion and vibration of solvent-laden air extraction. |
| Paint Circulation Pumps | Tyre Couplings | Provide the necessary flexibility for small motors driving viscous paint and lacquer pumps. |
| Post-Treatment & Exit Section | ||
| Skin Pass Mill (SPM) | Mill Spindle Gear Couplings | Handle the high torque required for final surface conditioning and flatness with triple-crowned teeth. |
| Tension Leveller Rolls | Gear Couplings (Multiple) | Synchronize the staggered rollers that stretch the strip to remove waviness and coil set. |
| Chemical Coater (Passivation) | Chain / Pin & Bush Couplings | Drive the rolls that apply anti-fingerprint or protective coatings in the post-treatment section. |
| Exit Looper Car Drive | Gear Couplings (Heavy-Duty) | Handle the high-cycle movement of the exit accumulator to maintain continuous strip flow at the recoiler. |
| Exit Shear & Slitter | Pin & Bush Couplings | Provide the give needed during high-speed shearing of the finished coated strip. |
| Tension Reel (Recoiler) | Gear Couplings (Heavy-Duty) | Manage the critical winding tension to ensure perfectly wound, telescoping-free coils. |
Standard couplings often fail in processing lines due to chemical exposure and the need for precision. Nu-Teck offers these customized variants
| Coupling / Product Type | Description & Purpose |
| Nu-Teck Spacer Type Gear Couplings | Extended middle section allows removal of pump seals or furnace roll bearings without moving the motor — essential for maintenance in confined furnace and pot structures. |
| Nu-Teck Mill Spindle Gear Couplings | Triple-Crowned Teeth design to operate at higher angular misalignment in Tension Levellers and Skin Pass Mills with zero backlash and precise speed synchronization. |
| Nu-Teck Shear Pin Gear Couplings | Integrated weak-link shear pin fractures during a strip jam — instantly protecting expensive Recoiler or Uncoiler gearboxes from catastrophic overload damage. |
| Nu-Teck Sliding Gear Couplings | Sliding hub design for quick disconnection during maintenance or roll changes in the coating section — significantly reduces changeover downtime. |
| Nu-Teck Gear Couplings with Brake Disc | Used on the motor input side in high-RPM applications. Dynamically balanced for reduced vibration, longer coupling life, and smooth operation. |