Precision Disc Spring Stack with High Axial Clamping Force for CNC Spindles Made from 51CrV4 Material

Belleville Spring Stack

Corrosion-Resistant Disc Spring Stack

High Precision Disc Spring Stack

Product Details

Primary Materials:	51CrV4 (DIN 1.8159)	Force Tolerance:	±5% Or Tighter
Inner Diameter:	4.2 Mm To 200.0 Mm	Fatigue Life:	1,000,000 Cycles
Deflection Range:	50% To 75% Of Total Height	Surface Treatment:	Shot-peened
Load Distribution:	Uniform Mechanical Load	Axial Runout:	Minimized
Vibration Damping:	Micro-vibrations Dampened	Stroke Configuration:	Face-to-face Stacking
Clamping Force:	High Axial	Heat Treatment:	Advanced Automated
Precision Stamping:	Advanced Automated	Material Optimization:	Vacuum Degassing
Dynamic Stability:	Enhanced	Bearing Preload:	Accurate
High RPM:	Reduced Heat Generation	Surface Finish:	Superior Workpiece
Spindle Bearing Life:	Extended	Stack Configuration:	Series Stack
Highlight	51CrV4 Precision Disc Spring Stack , CNC Spindle Precision Disc Spring Stack

Product Description

Precision Disc Spring Stack for Machine Tool Spindles and Clamping Systems

For high-speed CNC machining centers, precision and repeatable accuracy are non-negotiable. Jiangsu Sanzhong Elastic Technology Co., Ltd. manufactures high-frequency Disc Spring Stack assemblies designed for machine tool spindles, automatic tool changers (ATC), and workpiece clamping mechanisms. These specialized spring stacks deliver high axial clamping forces within restricted spaces, ensuring that tool holders remain securely locked during heavy milling, drilling, and turning operations.

+------------------------------------------------------------------------+ | SERIES STACK CONFIGURATION | | | | Placing washers face-to-face multiplies the total stroke | | while keeping the load equal to a single disc. | | | | ___ ___ ___ | | / / / | | /_____ /_____ /_____ | | _______ _______ _______ | | / / / | | _____/ _____/ _____/ | | | | Key Benefit: Perfect for CNC tool drawbars that require a long, | | linear stroke to release and engage tool holders smoothly. | | | +------------------------------------------------------------------------+

The dynamic stability of a tool spindle depends directly on the quality of its internal spring elements. Our manufacturing facility utilizes advanced automated heat-treating and precision stamping technologies to ensure that every individual disc within the stack shares the mechanical load uniformly. This uniform distribution prevents uneven wear, minimizes axial runout, and dampens micro-vibrations, resulting in superior workpiece surface finishes and extended spindle bearing life.

Target Client Applications

CNC Machining Center Drawbars: Deployed to maintain constant tension on retention knobs, ensuring secure tool holder engagement.
Power Chuck Clamping Systems: Integrated into hydraulic or pneumatic power chucks to provide fallback mechanical clamping pressure.
High-Speed Rotating Spindles: Used to apply accurate bearing preloads, reducing heat generation and vibration at high RPMs.

Technical Specifications & Product Parameters

Primary Materials: Premium 51CrV4 (DIN 1.8159), optimized via vacuum degassing for high fatigue life.

Force Tolerance Profile: Maintained within strict limits (±5% or tighter) via automated electronic load testing.

Inner Diameter (ID) Range: Machined to fit spindle tie-rods from 4.2 mm up to 200.0 mm.

Fatigue Life Rating: Guaranteed for over 1,000,000 tool-change cycles under recommended deflection ranges (between 50% and 75% of total height).

Surface Balance Enhancement: Shot-peened surfaces to introduce compressive residual stresses, preventing micro-cracking and premature fatigue failure.

Product Highlights

Precision disc spring stacks for CNC spindles & clamping. High axial force in compact spaces. 51CrV4 steel, ±5% force tolerance, 1M+ cycle life. Ensures secure tool holding & superior surface finish.

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