Factory direct | S45C forged steel | Double taper design | 6400 N·m torque | 197 kN axial load | 12.9 grade screws | Overload protection | Reusable | Direct Misumi MLAT replacement | OEM customizable

The Apexcoupling MLAT / AL-F series is a high-torque double taper shrink disc (keyless locking assembly) engineered for demanding shaft-to-hub connections in heavy industrial applications. Featuring a double taper short-type design with S45C forged steel construction, this keyless locking device delivers exceptional torque transmission, high axial load capacity, and zero-backlash operation – without the need for keyways or splines. The 12.9 grade high-strength screws provide secure clamping force, while the overload protection feature ensures equipment safety by slipping under extreme loads. Fully interchangeable with Misumi MLAT series, the MLAT/AL-F shrink disc is the ideal solution for CNC machine tools, heavy machinery, packaging equipment, textile machinery, printing presses, wind turbine gearboxes, and factory automation.

✅ Double taper short-type design – high torque capacity in a compact package. Overload protection – slips to protect equipment. Reusable – multiple installation cycles. Direct Misumi MLAT replacement – no design changes required.

Key Technical Specifications

🔧 Custom bores, outer diameters, and special finishes available. Contact us with your specifications.

MLAT / AL-F Series – Model Range & Specifications

📐 Custom sizes and dimensions available upon request. Contact our engineering team for custom sizing.

Model Designation – MLAT / AL-F Series

MLAT-□□ × □□ or AL-F-□□ × □□

Example: MLAT-55×30 = Outer diameter 55mm, Inner diameter 30mm

💡 Note: AL-F is the factory designation for the same double taper short-type high torque locking assembly. Both series are fully interchangeable with Misumi MLAT.

Product Structure – Double Taper Short-Type Keyless Locking

1. Inner Tapered Ring – S45C forged steel, precision-machined with H7 bore, fits over the shaft.

2. Outer Tapered Ring – S45C forged steel, double taper design provides high clamping force.

3. Locking Screws – 12.9 grade high-strength screws (M6×35 or M8×45 depending on size).

4. Removal Thread Holes – Pre-drilled holes for easy disassembly.

💡 How it works: The MLAT/AL-F shrink disc uses a double taper short-type design to create a friction-lock connection between shaft and hub. When the 12.9 grade locking screws are tightened to the specified torque, the inner and outer tapered rings are forced together, generating high radial pressure that locks the hub securely onto the shaft. This creates a zero-backlash, keyless connection that transmits torque and axial forces through friction. The double taper design provides higher torque capacity in a shorter axial length compared to single taper designs. In the event of overload, the assembly slips to protect connected equipment. The removal thread holes allow for easy disassembly without special tools.

Material & Finish Options

Product Features & Advantages

Keyless Locking vs Traditional Keyway – Why Choose Shrink Disc?

Applications

• CNC Machine Tools – Spindle connections, high-precision positioning

• Heavy Machinery – Crushers, conveyors, mills, mixers

• Packaging Machinery – High-speed, reliable drives

• Textile Machinery – High-speed, precision drives

• Printing Machinery – Register control, high-speed operation

• Food Processing Machinery – Hygienic, corrosion-resistant applications

• Wind Turbine Gearboxes – High torque, reliable connections

• Factory Automation – Pick-and-place systems, indexing tables

• Material Handling – Conveyors, elevators, hoists

• Light Industry – General power transmission

Why Choose Apex Coupling for MLAT/AL-F Shrink Discs?

FAQ

Q: What is a shrink disc (keyless locking assembly)?
A: A shrink disc (also called a keyless locking assembly or shrink disc) is a friction-based mechanical device that connects a hub to a shaft without using keys or keyways. It transmits torque and axial forces through radial clamping pressure created by tightening high-strength screws.

Q: What is the advantage of the double taper short-type design?
A: The double taper short-type design provides higher torque capacity in a shorter axial length compared to single taper or standard designs – saving space in tight installations while delivering exceptional torque transmission.

Q: What materials are used?
A: The MLAT/AL-F series is manufactured from S45C forged steel (equivalent to 45# steel) – offering high strength, excellent wear resistance, and durability.

Q: What surface finishes are available?
A: Standard finish (光亮处理), black oxide (发黑), electroless nickel plating (镀镍), zinc plating (镀锌), and phosphating (磷化).

Q: What is the torque and axial load capacity?
A: Maximum torque is 6400 N·m and maximum axial load is 197 kN (for MLAT65/AL-F65).

Q: What grade are the screws?
A: The locking screws are 12.9 grade high-strength – smooth, burr-free, and resistant to loosening under vibration.

Q: Does the shrink disc have backlash?
A: No. The MLAT/AL-F series features zero backlash – no rotational clearance, ensuring precise positioning.

Q: Does the shrink disc provide overload protection?
A: Yes. In the event of overload, the shrink disc slips, protecting connected equipment from damage.

Q: Can the assembly be reused?
A: Yes. The MLAT/AL-F shrink disc can be disassembled and reinstalled multiple times without damage.

Q: Is this a direct replacement for Misumi MLAT?
A: Yes. The MLAT/AL-F series is fully interchangeable with Misumi MLAT series – no design changes required.

Q: Can I get a custom coupling?
A: Yes. We offer OEM customization – custom bores, outer diameters, and finishes available.

Request a Quote

Send us your bore size, outer diameter, torque requirement, and application details. Our engineers will recommend the optimal model and provide a quotation within 24 hours.