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Tsubaki Power-Lock®: The Ultimate Keyless Shaft Locking Device Solution

Keyway failures, shaft damage caused by reversing loads, and high machining costs are major challenges in drive systems. Tsubaki Power-Lock® (Keyless Locking Device) is a friction-based keyless shaft locking solution that eliminates backlash, increases shaft fatigue life, and optimizes maintenance downtime.

1. Operating Mechanism & Technical Advantages

The device operates on the taper ring principle, consisting of inner and outer rings along with taper rings. When the locking bolts are tightened using a specialized torque wrench, the taper rings slide against each other, generating uniform contact pressure directed inward onto the shaft and outward into the hub bore.

• Backlash-Free: A tight 360 friction connection completely eliminates keyway hammering when the machine runs on continuous load reversals or heavy impact loads.

• Shaft Protection & Increased Durability: Eliminating keyway machining keeps the shaft cross-section intact. This is critical for hollow shaft applications or high-torque transmissions.

• Flexible 360 Angular Positioning: Allows precise 360-degree angular adjustment--an optimal solution for cam mechanisms, indexing tables, or synchronized conveyor sprockets.

• Dual Load Capacity: Capable of simultaneously transmitting high transmissible torque and high axial thrust .

2. Classification of Popular Tsubaki Power-Lock® Series

1. Power-Lock AS Series (Standard Type)
   The world's most popular series, offering high torque transmission capacity and a wide range of sizes. Stainless steel options (AS-SS) or anti-corrosion coatings are available.

2. Power-Lock AE / KE Series (Compact Design Series)
   Optimized for thin hubs with small outside diameters, ideal for servo motor shafts and space-constrained drive assemblies.

3. Power-Lock TF / EF Series (Self-Centering Series)
   Features an integrated self-centering mechanism, achieving high concentricity without requiring complex pilot guides on the hub bore.

4. Power-Lock RE Series (Stainless Steel Series)
   Manufactured entirely from stainless steel, specifically designed for humid environments, chemical processing, or food production lines.

5. Power-Lock AD / ADN Series (Heavy-Duty Series)
   Delivers twice the transmissible torque capacity of the standard AS series on the same shaft diameter.

3. Important Installation Guidelines

• Surface Preparation: Clean old grease thoroughly. Apply a thin layer of oil to the mating surfaces (Never use lubricants containing Silicone or Molybdenum Disulfide as they reduce the friction coefficient).

• Bolt Tightening Sequence: Always use a torque wrench to tighten bolts in a crisscross/star pattern, proceeding in multiple incremental steps.

Applying Tsubaki Power-Lock® completely resolves keyway failure issues, shortens maintenance downtime, and enhances overall system reliability. Contact us today to receive detailed technical specification charts and expert part selection support.

📩 Contact Tsubakimoto Vietnam today for technical catalogues, chain sizing consultations, and advanced engineering solutions!

• Website: tsubaki.net.vn

• Email: sales@tsubaki.net.vn

• Fanpage: Tsubakimoto Vietnam