This is a highly specialized request for a critical rotating component. For the Ingersoll Rand MSG TURBO-AIR NX 2500, the centrifugal impeller is a high-speed, precision-machined part (typically aluminum or stainless steel) that is stage-specific and serialized to your exact machine.
Directly purchasing this requires strict adherence to OEM specifications. Here is your actionable path:
1. Immediate Part Identification
You cannot order this by model number alone. Locate your compressor's data plate and have ready:
Full Model Number (e.g., NX 2500, NX 2550 variant)
Serial Number (Critical – IR links impellers to this)
Stage Number (1st, 2nd, or 3rd stage impeller? Each has different aero/geometry)
Original Part Number (etched on the impeller hub or in your maintenance manual)
2. Sourcing Options
| Source | Lead Time | Cost Estimate | Notes |
|---|---|---|---|
| Ingersoll Rand OEM (via official distributor) | 12-20 weeks | $15,000 - $35,000+ | Includes balancing report and cert; safest for warranty/oil-free certification |
| Authorized IR Service Center (e.g., FS-Elliott? No, they are separate) | 8-16 weeks | Similar to OEM | Use only IR-certified; aftermarket impellers for NX series are extremely rare due to proprietary profiling |
| Specialized Aftermarket (e.g., CAG, Compressor Engineering Corp.) | 6-12 weeks | 20-40% less than OEM | Must provide your old impeller for reverse-engineering; risk of performance loss |
Critical Warning: Do not buy from non-aviation/compressor certified machine shops. NX 2500 tip speeds exceed 1,000 ft/sec; an improperly machined impeller will burst catastrophically.
3. Technical Specifications (for verification)
If you are having one reverse-engineered, these are typical for NX 2500:
Material: Forged 7075-T6 aluminum (lower stages) or 17-4PH stainless steel (higher stages/temp)
Balancing Grade: ISO 1940 G1.0 or G0.4 (high-speed)
Coating: Anodize (Al) or nickel/PTFE anti-corrosion coating
Attachment: Shrink-fit or tie-rod mounting (specific to your shaft taper)
4. Steps to Order
Stop operation immediately if the impeller is damaged (unbalance will destroy bearings and seals).
Contact your local Ingersoll Rand distributor (or IR Parts Central: 1-800-483-4981 in US).
Provide: *Model NX 2500, S/N [X], Stage [1/2/3], need new impeller P/N [from manual]*.
Ask if repair/re-profiling is possible (IR offers this for ~50% of new cost, but only if cracks/damage are minimal).
5. Common Failure Modes on This Model
Erosion from dirty intake (silica/salt) – Requires upgraded filtration.
Fatigue cracks at the inducer tips – Typical after 40,000-60,000 hours.
FOD damage (foreign object debris) – Check upstream air filter integrity.
