AMF Chevvron 2-32
The AMF Chevvron 2-32 represents a leap forward in mid-range machining solutions, combining robust construction with precision capability. Designed for job shops and light industrial environments, it excels at drilling, milling, and light turning tasks on metals, composites, and high-performance plastics. Its modular architecture allows users to tailor the machine to specific production requirements while maintaining high repeatability and ease of maintenance.
Design and Construction
The Chevvron 2-32’s design philosophy centers on rigidity and user accessibility. Every major component—from the base casting to the spindle assembly—undergirds the machine’s capacity to hold tight tolerances under variable loads.
Frame and Materials
The base and column are cast from high-grade Meehanite iron, chosen for its excellent damping properties and minimal thermal distortion. Critical surfaces undergo precision grinding to ensure perfect alignment of the spindle axis and table travel. The exterior panels are modular, enabling quick removal for service and inspection.
Drive System
Power transmission is handled through a combination of helical gears and precision ground shafts. This arrangement minimizes backlash while providing smooth torque transfer at all spindle speeds. A servo-controlled variable frequency drive (VFD) ensures stable motor operation and consistent torque under changing load conditions.
Spindle Assembly
At the heart of the Chevvron 2-32 sits an air-bearing spindle system. The dual-distance air bearings drastically reduce friction and thermal growth, allowing the spindle to maintain run-out figures below 5 microns at full speed. The spindle taper is ISO 30, offering compatibility with a broad spectrum of tooling.
Performance and Capacity
The Chevvron 2-32 balances power with precision, offering a range of capabilities suited to small to medium workpieces.
Motor and Power
- Standard motor rating: 7.5 kW (10 HP)
- Voltage requirement: 380 VAC, three-phase, 50/60 Hz
- Peak torque: 45 Nm at 600 rpm
The motor couples directly to the spindle via the VFD, ensuring seamless acceleration and deceleration profiles.
Spindle Speeds
A wide speed range caters to diverse operations:
- Minimum speed: 100 rpm
- Maximum speed: 8,000 rpm (optional upgrade to 12,000 rpm)
- Speed increments: 1 rpm resolution via digital control
Feed Rates
Table traverse and quill feed are hydraulically dampened for smooth motion under load:
- X-axis (longitudinal): 0–2,500 mm/min
- Y-axis (cross): 0–1,500 mm/min
- Z-axis (vertical/quill): 0–1,000 mm/min (manual/automatic selection)
Control Systems and Electronics
The Chevvron 2-32 is offered in both manual interface and CNC-ready configurations.
User Interface
For semi-automatic operation, a full-color touchscreen provides quick access to spindle speed, feed rate, and lubrication monitoring. Shortcut keys allow experienced operators to engage manual overrides and jog functions instantly.
CNC Option
An integrated CNC package based on a 4th-generation controller supports up to four axes and includes:
- 10,000-line program memory
- APT and G-code compatibility
- Ethernet and USB connectivity for program transfer
- Real-time diagnostic display of drive currents, vibration levels, and temperature
Precision and Accuracy
Tolerance Levels
Under optimal conditions, the AMF Chevvron 2-32 consistently achieves:
- Positional accuracy: ±0.005 mm
- Repeatability: ±0.003 mm
Vibration Dampening
Strategically placed polymer-filled dampers within the column and headstock reduce amplitude of resonant frequencies, extending tool life and improving surface finish quality.
Technical Specifications
| Parameter | Specification |
|---|---|
| Table size | 650 mm × 260 mm |
| T-slot configuration | 3 × 18 mm slots, 90 mm pitch |
| Longitudinal travel (X-axis) | 550 mm |
| Cross travel (Y-axis) | 260 mm |
| Vertical travel (Z-axis) | 400 mm |
| Quill travel | 150 mm |
| Quill diameter | 110 mm |
| Spindle taper | ISO 30 |
| Spindle speeds | 100–8,000 rpm (12,000 rpm optional) |
| Motor power | 7.5 kW (10 HP) |
| Rapid traverse | 2,500/1,500/1,000 mm/min |
| Machine weight | 1,250 kg |
| Footprint | 1,100 mm × 900 mm |
| Power supply | 380 VAC, 50/60 Hz, three-phase |
| Coolant system | 100-liter tank with 0.75 kW pump |
Installation and Operation
Foundation Requirements
A level concrete pad with a minimum thickness of 150 mm is recommended. Anchor bolts must be placed at machine feet using an approved epoxy resin to minimize vibration transfer.
Commissioning
On-site commissioning includes alignment checks for the spindle, table run-out validation, and verification of bearing preload. A full demonstration of manual and CNC functions ensures the operator is acquainted with routine tasks.
Maintenance and Service
Lubrication
The Chevvron 2-32 incorporates an automatic central lubrication system. Fill intervals are programmable, and low-level sensors trigger alarms to prevent bearing starvation.
Replacement Parts
All wear items, including belts, seals, and wayscrapers, are easily accessible via removable side panels. A dedicated parts kit can be ordered to keep critical spares on hand.
Safety Features
A full-width polycarbonate safety shield guards the working area. Electrical interlocks disable the spindle if the guard is opened during operation. Emergency stop buttons are placed on three sides of the machine for rapid shutdown.
Applications
Typical uses span prototyping, small-batch production, and educational settings. The wide speed range and precision capabilities make it ideal for:
- Metal cutting and drilling
- Mold and die work
- Prototype component fabrication
- Precision trimming of composite parts
Conclusion
The AMF Chevvron 2-32 marries the durability of a cast-iron frame with advanced spindle and control technologies. Its versatility and precision make it a standout choice for workshops seeking reliable performance without compromising on accuracy or ease of use.
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