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Tsubaki POWER-LOCK®: The Ultimate Keyless Locking Device Solution for Drivetrain Systems

Tsubaki POWER-LOCK® utilizes a dual-taper ring mechanism combined with high-pressure locking bolts. Tightening the locking bolts exerts uniform concentric surface pressure onto both the shaft and hub surfaces. This securely fixes components to the shaft without requiring any keyway machining.

This distinctive design principle is precisely what sets Tsubaki POWER-LOCK® apart from conventional locking methods on the market.

Outstanding Features of Tsubaki POWER-LOCK®

Completely Eliminates Backlash & Resists Heavy Shock Loads

Thanks to its 360-degree clamping mechanism around the shaft, POWER-LOCK® achieves zero backlash, enabling the system to withstand heavy shock loads, sudden reversing loads, and axial loads without deformation or damage.

Protects Shaft Integrity & Enhances Shaft Strength

Eliminating keyway cutting leaves the original diameter and mechanical structure of the shaft intact, fully preserving its material strength.

Reduces Machining Costs & Simplifies Installation

Installation requires only a single tool. Maintenance and replacement of worn components are significantly simpler compared to shrink-fit, press-fit, or welded connections.

Precise Angular & Phase Adjustment

Unconstrained by fixed keyway positions, POWER-LOCK® allows free 360-degree rotational adjustment for precise angular positioning.

Superior Fretting Corrosion Resistance

Eliminating micro-movements between the shaft and hub prevents fretting corrosion, extending the operational lifespan of the entire machinery setup.

Versatile Product Series for Every Application



Tsubaki offers a comprehensive range of POWER-LOCK® series engineered to meet specific technical requirements:

• AS Series: The standard series, featuring optional Stainless Steel (AS-SS) and Nickel-Plated (AS-KP) versions for effective corrosion resistance in harsh chemical environments.

• AD Series: High-torque design delivering 1.5 to 3 times the torque capacity of the AS Series.

• KE / AE / FL Series: Integrated self-centering capability, ideal for small shafts or space-constrained installations.

• SL Series / EL Series: External locking solutions specially designed for hollow shafts and compact equipment designs.

By overcoming the traditional limitations of keyway connections, Tsubaki POWER-LOCK® stands out as the ideal solution to optimize machining costs, enhance system durability, and maximize operational efficiency for modern manufacturing facilities.

👉 Contact Tsubakimoto Vietnam to schedule a product consultation or an on-site factory survey:

• Website: tsubaki.net.vn

• Email: sales@tsubaki.net.vn

• Fanpage: Tsubakimoto Vietnam