(SR • FP • ER Series CNC Routers)
Heian CNC routers are widely used in cabinet production, nested-based manufacturing, plastics, composites, and light aluminum routing. Many Heian machines operate with high-speed electrospindles in the 12,000–18,000+ RPM class, making preload accuracy, contamination control, and balance critical to performance.
This page organizes Heian spindle repair information by specific model to help you quickly identify symptoms and common failure patterns.
Atlanta Precision Spindles repairs the spindle assembly only.
🔹 Heian SR-431P Spindle Repair
(Multi-Spindle Production Router Platform)
Commonly listed as a 4-spindle configuration with speeds up to approximately 18,000 RPM (listing dependent).
Typical Applications
- Panel processing
- Production routing
- MDF and plywood cutting
Common SR-431P Spindle Issues
- Vibration increasing with RPM
- Heat rise during long production cycles
- Uneven wear between multiple spindles
- Finish chatter on nested cuts
Why Failures Occur
- High daily runtime
- Fine dust contamination
- Bearing fatigue from sustained high speed
- Imbalance amplification
🔹 Heian FP-151-MC-2113 Spindle Repair
(5-Axis Router – NT30 ATC Configuration)
Public listings describe this model with:
- NT30 ATC spindle
- Variable speed approx. 2,000–18,000 RPM
- 5-axis capability (machine dependent)
Typical Applications
- 5-axis trimming
- Mold & composite routing
- Complex contouring
Common FP-151-MC-2113 Spindle Issues
- Chatter during multi-axis trimming
- Heat rise at higher RPM ranges
- Tool interface wear (ATC taper)
- High-frequency bearing noise
Why Failures Occur
- Frequent acceleration/deceleration
- ATC taper fretting
- Preload drift under speed variation
- Dust exposure in routing environments
🔹 Heian ER-131PMC-1632RDX Spindle Repair
(ER Series Nested-Based Router)
ER Series routers are commonly used in high-production nested manufacturing environments.
Typical Applications
- Cabinet production
- Panel cutting
- Continuous nested routing
Common ER-Series Spindle Issues
- Overheating during long cycles
- Grease degradation
- Bearing fatigue from sustained runtime
- Finish deterioration as heat rises
Why Failures Occur
- Long daily operating hours
- Fine MDF dust contamination
- Lubrication breakdown
- Imbalance growth over time
🔹 Heian SR-231PF-R2-2616 Spindle Repair
(2-Spindle Router Platform)
Commonly described as a 2-spindle router configuration.
Typical Applications
- Production routing
- Multi-head operations
Common SR-231PF Spindle Issues
- Uneven wear between spindles
- One spindle running hotter than the other
- Finish difference between heads
- Vibration under load
Why Failures Occur
- Load imbalance between heads
- Dust infiltration
- Bearing fatigue
- Improper lubrication volume
Common Heian Router Spindle Failure Patterns
Across most Heian router models, the most frequent issues include:
1️⃣ Overheating
Often caused by:
- Preload drift
- Grease breakdown
- Internal friction increase
- Restricted cooling airflow
2️⃣ Vibration Increasing with RPM
Common causes:
- Bearing fatigue
- Rotor imbalance
- Contamination damage
- Taper wear (ATC models)
3️⃣ Finish Chatter
Often linked to:
- Radial play growth
- Imbalance
- Thermal instability
- Tool interface inconsistency
4️⃣ Dust Contamination
Fine wood dust is one of the most aggressive contributors to premature electrospindle failure.
Our Heian Spindle Rebuild Process
We focus on restoring high-speed stability and contamination resistance.
Our process includes:
- Complete spindle disassembly
- Bearing designation verification
- Matched super-precision bearing replacement
- Controlled preload assembly
- Seal inspection & contamination mitigation
- Dynamic balance correction
- Shaft and housing evaluation
- Thermal stabilization testing
The objective is smooth, stable rotation at operating RPM.
Repair vs Replacement
Replacing a Heian electrospindle can involve:
- International sourcing
- High replacement cost
- Extended production downtime
A precision rebuild is often appropriate when:
- Shaft and housing remain within tolerance
- Motor windings are intact
- Failure is primarily bearing-related
Rebuilding restores performance without replacing the full spindle assembly.
Atlanta Precision Spindles repairs the spindle assembly only — not the Heian CNC router.
Need Help Identifying Your Heian Model?
If you are unsure which model you have, provide:
- Machine model number
- Spindle nameplate photo
- Taper type (if ATC)
- Operating symptoms
- Approximate runtime hours
We can help determine whether your issue is likely bearing-related.