TAS3003/150/200 SCHAEFER compression-expansion ring

SCHAEFER TAS 3003/150/200 Locking Assembly

The SCHAEFER TAS 3003/150/200 is a high-precision mechanical fastener designed to create a rigid, backlash-free frictional connection between a hub and a 150 mm diameter shaft. This system utilizes a double-tapered mechanism: tightening the integrated mounting screws generates massive radial pressure that securely clamps the ring onto the shaft and expands it into the hub. With its self-centering function, the TAS 3003 model ensures superior concentricity, which is vital for minimizing vibration and run-out in heavy-duty drive systems.

Application

• Heavy Conveyor Drums: Stable mounting of drive pulleys in bulk material handling systems.
• Mounting Large Pulleys and Gears: Rapid installation on smooth shafts without the need for stress-inducing keyways.
• Industrial Gearboxes: Connecting output shafts to functional elements in heavy production machinery.
• Rigid Couplings: Building durable shaft-to-shaft connections with high alignment precision.
• Mills and Crushers: Transmitting immense torque under severe vibration and shock loads.

Technical Specification

• Manufacturer: SCHAEFER (Germany)
• Designation: TAS 3003/150/200
• Main Dimensions: 150 mm (ID / d) × 200 mm (OD / D).
• Type: Self-centering Locking Assembly.
• Material: High-grade heat-treated structural steel.

Installation Tip: For the installation of a 150 mm diameter model, it is mandatory to use a torque wrench and tighten the screws in stages (e.g., 50%, 75%, 100% torque) following the manufacturer's specified sequence.

Features and Benefits

• Elimination of Notch Effect: Keyless mounting increases shaft rigidity and fatigue resistance.
• High Rotational Accuracy: The self-centering geometry minimizes radial run-out, protecting bearings from premature failure.
• Infinite Angular Adjustment: Allows for perfect positioning of the hub relative to the shaft before final locking.
• Dynamic Load Resilience: Frictional connection excels under sudden reversals and severe torque shocks.
• Simple Maintenance: Integrated jacking-off threads allow for quick release without damaging the shaft surface.

Why Choose This Product

Opting for the SCHAEFER TAS 3003/150/200 locking assembly is an investment in the maximum reliability of your strategic drive nodes. For shafts of such large diameters, the cost of failure and keyway repair is staggering – using SCHAEFER keyless technology virtually eliminates this risk. This premium solution ensures the stability of industrial processes and significantly lowers the Total Cost of Ownership (TCO).