(CAT40 • BT40 • High-Speed Vertical Machining Centers)

Chevalier Machinery Inc. Vertical Machining Centers are widely used in toolrooms, mold & die shops, and production environments. These machines typically utilize high-speed cartridge spindle assemblies with super-precision angular contact bearing systems.

Atlanta Precision Spindles rebuilds the spindle assembly only, restoring preload integrity, dynamic balance, taper accuracy, and thermal stability.

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Common Chevalier VMC Series

Chevalier has produced multiple VMC platforms including:

🔹 QP Series

• Production-focused machining centers
• CAT40 taper common
• 8,000–12,000 RPM typical

🔹 FVM Series

• Toolroom & precision milling applications
• Mold & die environments
• Higher RPM configurations available

🔹 High-Speed Variants

• 12,000–15,000+ RPM capability
• Often utilize hybrid bearing systems
• Greater sensitivity to preload and lubrication accuracy

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Typical Chevalier VMC Spindle Configurations

• CAT40 or BT40 taper
• Cartridge-style integrated spindle assemblies
• Super-precision angular contact bearings (70xx / 719xx series)
• Grease or oil-air lubrication (model dependent)
• Belt-driven or direct-drive motor configurations

Preload accuracy and balance are critical for high-RPM stability.

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Common Chevalier VMC Spindle Failure Modes

1️⃣ Overheating

Often caused by:

• Preload imbalance
• Over-greasing
• Bearing friction increase
• Internal contamination

Rapid heat rise at idle is an early warning sign.

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2️⃣ Vibration Increasing With RPM

Typically related to:

• Bearing fatigue
• Rotor imbalance
• Skidding in high-speed variants
• Taper fretting

Vibration often appears before catastrophic failure.

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3️⃣ Taper Wear & Tool Interface Issues

In CAT40 / BT40 configurations:

• Pull stud wear
• Taper fretting
• Tool seating inconsistency
• Measurable runout growth

Often mistaken for toolholder or axis issues.

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4️⃣ Contamination

Coolant mist and fine chips can:

• Degrade grease
• Pit raceways
• Accelerate bearing fatigue

Production environments increase exposure risk.

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Warning Signs Your Chevalier VMC Spindle Needs Service

• Spindle running hotter than baseline
• Surface finish chatter
• High-frequency bearing noise
• Measurable taper runout
• Reduced tool life
• Vibration increasing at higher RPM

Early diagnosis often limits repair scope.

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Our Chevalier VMC Spindle Rebuild Process

We focus on restoring stiffness, alignment, and predictable thermal performance.

Our process typically includes:

• Complete spindle disassembly
• Bearing designation verification
• Matched super-precision bearing replacement
• Controlled preload assembly
• Dynamic balance correction
• Seal inspection and contamination mitigation
• Taper inspection and runout verification
• Thermal stabilization testing

The objective is stable high-speed operation with controlled temperature rise.

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Repair vs Replacement

Replacing a Chevalier VMC spindle cartridge can involve:

• Significant cost
• Lead times
• Production downtime

A precision rebuild is often appropriate when:

• Shaft and housing remain within recoverable tolerance
• Bearing wear is primary failure
• Motor components remain intact

Rebuilding restores performance characteristics without replacing the entire spindle system.

Atlanta Precision Spindles repairs the spindle assembly only — not the Chevalier machine.

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Restore Accuracy & Production Stability

If your Chevalier VMC spindle is running hot, vibrating, or producing inconsistent finish quality, early evaluation can prevent internal damage and reduce downtime.

Contact Atlanta Precision Spindles to discuss your specific Chevalier model and operating symptoms.

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