Gripfast Power Chucks

Ultra-Fast, Precision Workholding for CNC Applications

Gripfast Power Chucks from Pratt Burnerd deliver high-performance, quick-change jaw technology that significantly reduces machine downtime and improves productivity. Designed for CNC turning applications, the Gripfast range combines the versatility of a power chuck, collet chuck, and mandrel chuck into a single, easy-to-operate solution – offering maximum flexibility across your workholding requirements.

Why Choose Gripfast?

Engineered for productivity, the Gripfast chuck system has been developed to meet the needs of modern manufacturing where fast changeover, repeatable accuracy, and secure gripping are essential. Whether for high-speed production or small-batch machining, Gripfast gives you a competitive edge with its innovative jaw-change mechanism and wide gripping capacity.

Applications & Use Cases

Gripfast Power Chucks are ideal for:

• CNC lathes and turning centres requiring fast job changeovers
• Small batch production or short cycle times
• Components with varying geometries requiring flexible jaw systems
• Manufacturers seeking to reduce setup time and increase spindle uptime

Commonly used in aerospace, automotive, general precision engineering, and subcontract machining.

Key Features & Benefits

• Quick-Change Jaws in Under 30 Seconds - Change jaws swiftly and safely without removing the chuck from the spindle, improving machine uptime and reducing operator error.
• Multi-Function Chucking - Gripfast combines power chuck, collet chuck, and mandrel chuck capabilities – offering exceptional flexibility for a variety of turning applications.
• High-Speed Capability - Designed for high-RPM performance with fully balanced components, allowing speeds of up to 6,000 RPM (model-dependent).
• Precision Gripping - Achieve high repeatability with a gripping accuracy of ±0.025 mm (TIR), ideal for precision machining environments.
• Versatile Jaw Options - Available in 2, 3, 5 and 6-jaw configurations, supporting soft jaws, hardened jaws, and collet pads to suit complex workpieces.
• Large Bore Range - Gripfast models are available from Ø165 mm up to Ø660 mm, offering solutions for small and large components alike.

Technical Specifications

• Chuck Sizes = Ø165 mm to Ø660 mm
• Jaw Types = 2-jaw, 3-jaw, 5-jaw, 6-jaw   
• Gripping Accuracy = ±0.025 mm (TIR)      
• Jaw Change Time = < 30 seconds    
• Max RPM = Up to 6,000 RPM            
• Applications = Power chuck, collet, mandrel 

FAQs

Q: What is the typical jaw change time for Gripfast Chucks?
A: Less than 30 seconds – thanks to the patented quick-change mechanism.

Q: Are Gripfast Chucks compatible with all CNC lathes?
A: They can be fitted to most modern CNC turning centres. Contact our team for compatibility guidance.

Q: Can I use soft jaws or collet pads?
A: Yes – Gripfast is designed to accept a wide range of jaw types, including soft, hard, serrated, and collet pads.