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Mechanical Power Transmission Products for Processing Lines

CAL / CGL / CCL — Processing Lines

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.

Power Transmission Products for Processing Lines
20 Applications in CAL, CGL, and CCL 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.
Types of Customized Gear Couplings for Processing Lines

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.