Hydraulic Power Chuck – Key Performance Indicators
Release time:
2025-09-11
Hydraulic chucks are critical for CNC lathes and grinders. Their performance directly affects machining accuracy, efficiency, and safety.
1. Accuracy Indicators
Repeat Clamping Accuracy: Radial runout difference when clamping the same part multiple times.
Standard: ≤0.01–0.03 mm, high precision ≤0.005 mm.
Centering Accuracy (Runout): Difference between workpiece axis and spindle axis after one clamping.
Crucial for thin-wall parts and precision finishing.
2. Force & Speed Indicators
Max. Clamping Force: Maximum gripping force at rated pressure (kN). Must exceed cutting force to avoid slipping.
Max. Speed (RPM): Safe speed limit. Exceeding may cause failure.
Centrifugal Force Compensation: Maintains clamping force at high speed; essential for high-speed cutting.
Actuation Response Time: Time needed to fully clamp/unclamp; shorter time improves efficiency in mass production.
3. Reliability & Applicability Indicators
Through Hole Diameter: Max. bar stock diameter allowed through the chuck.
Jaw Stroke: Max. radial travel of jaws; determines workpiece size range.
Rigidity & Anti-Vibration: Reduces deformation and vibration; vital for heavy cutting.
Service Life & Maintainability: Wear resistance of slides, wedge, seals; ease of part replacement.
Compatibility: Spindle mount types (A2-5, A2-6, A2-8) and jaw options (soft, hard, special jaws).
🔎 Selection Guide
High precision finishing → Focus on repeat accuracy, centering, rigidity.
High-speed machining → Speed rating, centrifugal compensation, balance grade.
Heavy/rough cutting → Max. clamping force, rigidity, anti-vibration.
Mass production of small parts → Response time, repeat accuracy, reliability.
Large/irregular parts → Jaw stroke, through-hole size, special jaws.
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