Locking Assemblies

Modern elements for shaft-hub connections. An alternative to traditional keyed connections, providing precise and easily removable mounting.

Why Use Locking Assemblies?

Locking assemblies work on the wedge principle, converting the axial force of the bolts into radial force. This allows for mounting sprockets, pulleys, or couplings on plain shafts without the need for milling keyways, which weaken the shaft.

  • No backlash in the connection
  • Easy assembly and fast disassembly
  • Angular positioning capability
  • Transmission of high torques
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Locking assemblies

Types of Locking Assemblies

Self-centering

Standard assemblies that provide both mounting and centering of the hub on the shaft.

Non-self-centering

Require prior centering of the hub on the shaft. Used for smaller diameters or specific designs.

External (Shrink discs)

Clamped on the outside of the hub. Ideal for hollow shafts and gearboxes.

Stainless steel

Made of stainless steel for applications in the food and chemical industries.

Why choose WIKA Gliwice?

  • Wide range of sizes available from stock
  • High quality workmanship guaranteeing repeatability
  • Favorable price-quality ratio
  • Technical support in selecting replacements

Need to Select a Locking Assembly?

Provide shaft diameter (d), hub bore (D), and required torque.

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Technical Materials

Download the catalogue with dimensions and torques transmitted by locking assemblies.

PDF Locking Assemblies - Catalogue Download PDF
FAQ

Frequently Asked Questions

Yes, provided they have not been overloaded (yielded) during assembly. It is recommended to replace the bolts when reassembling after long use.
The bolts should be tightened with a torque wrench, gradually and in a crosswise pattern, until the torque specified in the technical table (TA) is reached.
Yes, the shaft and hub should be lightly oiled before assembly to facilitate sliding of the cones. NOTE: Do not use lubricants with molybdenum disulfide (MoS2), as they reduce friction too drastically.

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