20/09/2025
What Should I Pay Attention To When Buying a Second‐Hand Okuma MX-45VAE CNC Vertical Machining Center?
When considering a used Okuma MX-45VAE, you want to ensure you make a smart investment. Below are key aspects to check, questions to ask, and red flags to watch out for.
Key Things to Inspect
- Machine Hours & Usage
- Ask for total running hours (
spindle hours) and workload history. - Was it used for heavy-duty cuts or light finishing? Machines used heavily or for roughing may have more wear.
- Ask for total running hours (
- Spindle Condition
- Inspect spindle bearings: listen for unusual noises, feel for vibration.
- Check for spindle runout: small deviations cause big issues in precision machining.
- Toolchanger & Turret Performance
- Make sure the tool changer works smoothly: tools lock properly, change time acceptable.
- Look for any signs of misalignment or damage in turret mechanisms.
- Axis & Servo Systems
- Check the condition of linear guides / box ways. Excess play or wear means more overriding errors.
- Inspect all axes (X, Y, Z) for backlash, smooth motion, accurate positioning.
- Controls & Electronics
- Confirm the CNC controller version, and whether all features are working: M-codes, safety interlocks, cooling, etc.
- Check electrical wiring, motors, drives; overheating signs, burn stains, old cabling can be a cost later.
- Coolant System & Chip Removal
- Is the coolant pump still strong? Lack of proper cooling reduces tool life.
- Check chip conveyor, how chips are evacuated; chip build-up can cause overheating or mechanical damage.
- Hydraulics / Pneumatic Systems
- If parts of the machine use hydraulics/pneumatics (tool clamping, fixtures, etc.), check for leaks, pressure stability.
- Machine Leveling & Foundation
- Ensure the base or foundation where machine was mounted is stable and level.
- Relocating a machine from a bad foundation can introduce misalignment.
- Spare Parts Availability
- Okuma is a known brand, but check whether specific wear parts (spindle bearings, ball screws, seals) are still available in your region.
- Also check cost and lead time of spares.
- Service & Maintenance History
- Request maintenance records: major overhauls? Any crashes? Repairs?
- A well-maintained machine can have a much longer useful life.
- Trial Run
- Always try to run the machine: use real parts or test pieces.
- Check surface finish, accuracy, coolant usage, thermal stability.
- Cost Total Cost of Ownership
- Beyond purchase price, include transport, installation (leveling, mounting), setup, training, spare parts, maintenance.
- Factor in downtime costs if possible.
Red Flags to Watch Out For
- Excessive spindle noise or vibration.
- Smearing, chatter, or poor finish even on simple test cuts.
- Big backlash in axes.
- Poorly maintained coolant system (rust, sediment, choking).
- Missing essential safety or control components.
- Electrical panel dirty / wires corroded.
- Unusual oil or hydraulic leaks.
In short: inspect mechanical, electrical, and control systems carefully, verify history and hours, test the machine in real conditions, and ensure spare parts and support are accessible. A sound second-hand Okuma MX-45VAE can be a solid investment if these criteria are met.
