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Mechanical Power Transmission Products for Cold Rolling Mills

CRM — Cold Rolling Mills

In a Cold Rolling Mill (CRM), equipment faces extreme torque, high speeds, and constant vibration. To maintain precise gauge control and high-quality surface finishes, mill stands and auxiliary systems require robust, reliable power transmission.

Below are 20 essential applications where our Nu-Teck Couplings' specialised gear couplings, sprockets, and flexible couplings ensure maximum uptime and efficiency across all sections of the Cold Rolling Mill.

Power Transmission Products for Cold Rolling Mills
20 Applications in Cold Rolling Mill

Application-wise coupling reference for all critical drive points across Primary Mill Stands, Strip Tension & Coil Handling, Auxiliary Systems, and Process Control sections

Application Nu-Teck Couplings Description
 
Primary Mill Stand & Heavy Drives  —  Maximum torque density and rigid synchronization
Main Drive Motor-to-Gearbox Gear Couplings (High-Torque) Connect high-horsepower motors to primary reduction units, absorbing massive
starting loads.
Pinion Stand Distribution Gear Couplings Transmit synchronized power from the gearbox to the twin shafts driving the upper
and lower rolls.
Work Roll Drive Shafts Telescopic Gear Couplings Allow for vertical roll movement and diameter changes while maintaining a
constant drive connection.
Backup Roll Drives Gear Couplings Ensure consistent frictional force in 4-high or 6-high configurations to prevent strip
slippage.
Screwdown Mechanisms Gear Couplings (Heavy-Duty) Connect high-torque motors to the vertical screws that set the precise roll gap
for thickness control.
Uncoiler Mandrel Drives Grid Couplings Provide shock-absorption as the mandrel expands to grip heavy steel coils at
line start-up.
Strip Tension & Coil Handling  —  Precision movement for back tension and forward tension
Recoiler (Tension Reel) Shafts Gear Couplings Manage the exponentially increasing torque as the finished coil grows in diameter
during winding.
High-Capacity Bridle Rolls Pin & Bush Couplings Provide a dampened connection for multiple rolls in a bridle set to maintain consistent
strip tension.
Coil Lift Winches Gear Couplings Provide the mechanical link for heavy-duty hoists that center 30-ton coils onto the
mill centerline.
Belt Wrapper Drive Chain Couplings (Compact) Power the arms that wrap the first layers of strip onto the recoiler mandrel.
Coil Entry / Exit Conveyors Sprockets & Roller Chains Drive the walking beam conveyors that move heavy coils through the facility.
Coil Loading Car Drives Tyre Couplings Absorb the shock of positioning new coils onto the uncoiler with high flexibility.
Auxiliary Systems & Fluid Control  —  Motor protection and simplified maintenance
High-Pressure Coolant Pumps Tyre / Pin & Bush Couplings Connect motors to the pumps that spray rolling emulsion for heat management
and lubrication.
Backup Roll Lubrication Pumps Chain Couplings Ensure a steady flow of oil to the massive bearings within the roll chocks.
Fume Exhaust & Filtration Fans Grid Couplings Drive the centrifugal fans with excellent vibration damping to protect the
motor bearings.
Hydraulic Power Units (HPU) Chain Couplings Link motors to the pumps that power the mill's roll-balancing and hydraulic
screwdown systems.
Process Control & Maintenance  —  Mechanical positioning of mill components
Side Guide Adjustment Sprockets & Chains Move entry guides symmetrically to ensure the strip stays perfectly centered in the mill.
Roll Change Sleds Sprockets (Heavy-Duty) Power the shifters that pull the entire work roll and backup roll stack out for
maintenance.
Scrap Baller & Chopper Drives Pin & Bush Couplings Handle the pulsed loads of chopping side-trim scrap into recyclable pieces.
Strip Steering Units (EPC/CPC) Sprockets & Chains (Small) Facilitate fine-tuning of steering rolls to prevent the strip from tracking off-line.
Types of Nu-Teck Gear Couplings for Cold Rolling Mills

Customization is the key to managing the heavy axial and angular shifts inherent in cold rolling. Standard gear couplings often fail in a CRM environment because they cannot accommodate frequent roll changes or high-angle torque requirements. Nu-Teck offers these specialised variants

Coupling / Product Type Description & Purpose
Nu-Teck Telescopic (Sliding) Gear Couplings Feature a splined internal shaft or sliding sleeve that allows the coupling to extend or retract axially while under full load
— for work roll and backup roll drives where frequent roll-gap adjustments are necessary.
Nu-Teck Gear Spindle Couplings (Mill Spindles) Triple-crowned teeth (crowned on flank, tip, and face) maintain maximum surface contact at high angles. Case-hardened
(58–62 HRC) for high-cycle fatigue resistance in reversing mills connecting pinion stands to work rolls.
Nu-Teck Shear Pin Gear Couplings Sacrificial couplings with precision-machined shear pins calibrated to break at a specific torque limit — instantly
disconnecting the drive and protecting the motor and gearbox from cobble-induced shockwaves.
Nu-Teck Spacer Type Gear Couplings (Ext. DBSE) Feature a customised spacer tube (Distance Between Shaft Ends) between two flexible gear halves — allows
removal of pump seals or bearings without moving the motor. Used in coolant pumps and main drives with
restricted motor access.
Nu-Teck Disconnect / Shifting Gear Couplings Quick-release manual or hydraulic shifting mechanism allows operators to disengage the drive hub from the roll neck
almost instantly during a roll change — without unbolting the entire assembly.
Nu-Teck Gear Coupling with Brake Disc Used on the motor input side (dynamically balanced for RPM > 1000). Precisely stops rotation of 30-ton coils on
Coil Cars & Uncoilers, and stops drive motors rapidly after each cutting cycle on Shear Machines.