Surface grinding machine HFS 2550 F Advance

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Overview
The HFS F Advance series is the latest development of KNUTH's conventional surface grinding machines, providing a turnkey solution that combines robust mechanics with Siemens-based automated functions for efficient shop-floor grinding.

Key highlights

• Magnetic clamping plate with integrated degaussing
• Vertical axis with preloaded ball screw and servo motor for high positioning precision
• Siemens PLC with touchscreen enabling easy auto-mode programming
• Comprehensive standard equipment package for immediate production use

Product details

• Machine frame: cast-iron construction for torsional rigidity, precision guideways and high machining quality
• Lubrication & protection: central automatic lubrication for all guideways; work area protected by easily accessible enclosure
• Coolant & extraction: high-capacity coolant pump combined with vacuum extraction to remove grinding dust and aerosols

Grinding spindle

• Oversized, dynamically balanced spindle, fully sealed and permanently lubricated
• Preloaded precision bearings for consistent grinding performance during extended production

Programming & control

• High-quality preloaded ball screw and powerful servo provide repeatable Y-axis positioning
• Electronic handwheel for set-up and manual spindle movement
• Auto mode processes user-defined roughing/finishing parameters, spark-out strokes and return-to-zero automatically

Hydraulics

• Quiet operation with low heat generation for consistent results in continuous use
• Hydraulically driven longitudinal table movement, infinitely variable with smooth reversal
• External hydraulic unit with oil cooler for temperature stability

Magnetic clamping plate

• Large magnetic chuck included as standard for torsion-free clamping
• Integrated control unit for quick clamping and degaussing to maximise throughput

Working area (technical table)
Workpiece weight (max.): 180 kg
Spindle nose-to-table distance: 450 mm
Table dimensions: 508 mm x 254 mm
Magnetic chuck dimensions: 500 mm x 250 mm
Scale ring division Y-axis: 0,005 mm
Scale ring division Z-axis: 0,02 mm
Autom. transverse feed Z-axis: 0,1 mm - 8 mm
Spindle speed: 2,850 1/min
Autom. vertical feed: 0,005 mm - 0,05 mm

Travels (technical table)
Travel X-axis: 560 mm
Travel Y-axis: 275 mm

Feed (technical table)
Hydr. feed X-axis: 5 m/min - 25 m/min
Rapid feed Y-axis: 480 mm/min
Rapid feed Z-axis: 790 mm/min

Drive capacity (technical table)
Main drive motor rating: 2,2 kW

Measures and weights (technical table)
Grinding wheel dimensions: 200 mm x 20 mm x 31,75 mm
Overall dimensions (L x W x H): 2,3 m x 1,6 m x 1,68 m
Weight: 1.800 kg

Technical specifications

• Model: HFS 2550 F Advance
• Workpiece capacity: up to 180 kg
• Table (W x D): 508 x 254 mm
• Magnetic chuck: 500 x 250 mm (built-in degaussing)
• X-axis travel: 560 mm
• Y-axis travel: 275 mm
• Z-axis transverse feed (auto): 0.1–8 mm
• Z-axis vertical feed (auto): 0.005–0.05 mm
• Grinding wheel: 200 x 20 x 31.75 mm
• Main spindle speed: 2,850 1/min
• Main motor: 2.2 kW
• Rapid feeds: Y = 480 mm/min, Z = 790 mm/min
• Table drive: hydraulic, infinitely variable (X = 5–25 m/min)
• Control: Siemens PLC with touchscreen (auto-mode)
• Machine weight (approx.): 1,800 kg