MAV Locking Assembly

About MAV Locking Assembly

Established in 1989, MAV located in Altopiano della Vigolana (Bosentino) in Northern Italy is one of the worlds Largest Manufacturer of Locking Assemblies renowned for their creativity & Capacity to offer entire range of Locking Assemblies.

MAV specializes in designing and manufacturing special items according to customer application and design requirements. We manufacture keyless locking devices, external shrink discs, and rigid couplings for shafts ranging from 5 mm to more than 1 meter. This unprecedented product breadth includes more than 40 series available in both metric and imperial bores.

Standard Locking Devices
MAV Internal Locking Assemblies

Also known as clamping units, MAV internal locking assemblies mount inside the hub. As the screws are tightened, the resulting high radial forces create an interference fit that is a zero-backlash connection between the shaft and hub.

MAV locking assemblies use tapers that generate high radial forces when pushed together, creating high contact pressure and a zero-backlash connection. The locking assemblies mount gears, pulleys, cams, levers, rotors, and similar devices onto shafts, while our rigid couplings connect two shafts. MAV devices allow excellent centering between hub and shaft and are well balanced. Because of the high radial forces produced during installation, MAV devices can handle heavy torsional, axial, radial, or bending loads.

MAV Stainless Steel

All MAV units are available in stainless steel, including martensitic or austenitic stainless steel. Zinc plating, nickel plating, and phosphate treatment also are available. Please note, however, that any plating or treatment will impact performance. Our technical team can help you with the correct selection for your application.

MAV Mini Series

All MAV keyless locking device products are available in smaller sizes (starting from 5 mm) typical sizes for packaging machines, medical devices, and linear guides.

MAV Rigid Couplings

MAV rigid shaft couplings connect two shafts, transferring rotary motion from a driving shaft to a driven shaft. Simple and durable, MAV rigid shaft couplings transmit more power than comparable flexible shaft couplings. Unable to compensate for misalignment, they must be used in applications where the shafts are aligned. MAV rigid couplings are commonly used in automation, motion control, power transmission, as well as original equipment manufacturer (OEM) and maintenance, repair, and operation (MRO) applications.

Shrink Discs
MAV External Locking Devices

MAV shrink discs are installed externally on a hollow shaft or hub to connect it to a shaft, for example in a hollow-shaft gearbox. When the shrink discs locking screws are tightened, the thrust rings are drawn together and compress the inner ring. This creates an interference fit by applying pressure to the outside of the hub, thus clamping it onto the shaft. Shrink discs are the preferred alternative to conventional shrink, shrink/fit/press fit, tapered bushings or keyways.

Because the force applied to the hub is always within the elastic limit of the material, the hub springs back when the force is released, making MAV external locking devices easy to remove.

Superior Durability for Demanding Applications

Designed for heavy-duty industrial sectors, the MAV Locking Assembly exhibits exceptional mechanical strength and corrosion resistance. The combination of high tensile steel construction and specialized black oxide or phosphate coating ensures extended operational life, even in harsh environments. This makes it ideal for gearboxes, conveyor drives, and applications requiring robust torque transmission. Quality standards are maintained through adherence to DIN 69882 and ISO 9001:2015.


Engineered for Efficient Installation and Maintenance

Mounting and dismounting the MAV Locking Assembly is straightforward, thanks to its cylindrical structure and the use of high-tension hexagon bolts for tightening. The assembly supports both flange and shaft mounting, with ease of disassembly using standard tools. It allows for rapid installation and minimises downtime, improving operational efficiency in maintenance-intensive settings.