Z2 Locking Assembly
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Torque-transmitting locking unit

Z2 Locking Assembly

Model# Z2
Certs: ISO9001:2015, ROHS and REACH205 Compliant, Emvironmental friendly protection testing
Application:Conveyor drives, belt pulleys, sprockets，Gearboxes, speed reducers, couplings,Packaging machinery, labeling machines，Woodworking equipment, printing presses，Industrial fans, pumps, blowers etc.

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Product Introduction

Z2 Locking Assembly

Product Brief

Z2 Locking Assemblies are compact, self-centering keyless shaft-hub locking devices designed for medium-torque transmission and backlash-free operation. By tightening the clamping screws, the tapered rings expand uniformly against both shaft and hub, creating a reliable friction-locked connection that eliminates the need for keys or keyways while ensuring concentricity.

Key Features

Keyless Connection – No keyways means no stress concentration, no backlash, and simplified shaft preparation.

Self-Centering Design – Uniform clamping ensures high concentricity, ideal for applications requiring balanced rotation.

Medium-Torque Capacity – Optimized for applications where compact size and reliable torque transmission are required.

Easy Assembly & Disassembly – Simple screw tightening and jacking screw removal minimize installation time and maintenance costs.

Backlash-Free Operation – Provides precise positioning and smooth power transmission.

Interchangeable – Designed to replace common Z2‑style locking assemblies from major manufacturers (e.g., TLK200, KTR100).

Typical Applications

Conveyor drives, belt pulleys, sprockets

Gearboxes, speed reducers, couplings

Packaging machinery, labeling machines

Woodworking equipment, printing presses

Industrial fans, pumps, blowers

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Specfications:

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Customer satisfaction:

customers comments for carts heavy duty casters

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FAQS:

Q1. What is a Z2 Locking Assembly and how does it work?

A Z2 Locking Assembly (also known as a Z2 expansion sleeve or TLK200) is a keyless, self-centering shaft-hub locking device. By tightening the clamping screws, its tapered rings expand simultaneously against the shaft and hub, creating a friction-locked connection that eliminates keyways and backlash.

Q2. What is the main advantage of the self-centering design?

Self-centering ensures that the shaft and hub are perfectly concentric after tightening. This eliminates runout, reduces vibration, and improves rotational balance – critical for applications like conveyors, pulleys, and packaging machinery.

Q3. How do I install a Z2 Locking Assembly correctly?

Clean all mating surfaces (shaft, hub bore, and locking assembly).

Slide the assembly into the hub bore.

Insert the clamping screws and tighten them evenly in a cross pattern.

Gradually increase torque to the recommended value (refer to the product datasheet).

No additional keyways or special tools are required.

Q4. Can the Z2 Locking Assembly replace TLK200 or KTR100?

Yes. The Z2 type is mechanically interchangeable with common models such as TLK200, KTR100, STK200, and other major manufacturers' equivalent locking devices. Always verify dimensions (bore range, outer diameter, and length) before replacement.

Q5. What torque capacity can a Z2 Locking Assembly handle?

The Z2 series is designed for medium‑torque transmission – typically from several hundred to several thousand N·m, depending on the size. It is ideal for applications where compact dimensions and reliable torque transfer are required without the high loads of heavy‑duty shrink discs.