Appearance
A manufacturer's true capability is visible in their factory, not their brochures. The quality of their machining, assembly practices, and quality control determines whether your machine performs reliably for 15–20 years. A structured factory audit is the best investment you can make before placing an order.
Pre-Audit Research
Information to Gather Before the Visit
| Information Source | What to Look For |
|---|---|
| Company website and product range | Number of models, standard vs custom |
| Industry publications and press releases | Recent developments, new products |
| Trade show participation | Which shows, what they exhibit |
| Patent filings | Proprietary technology |
| Legal and regulatory checks | Litigation history, export compliance |
| Customer reviews and forums | Real-world experiences, common complaints |
| Financial reports (if available) | Revenue trends, R&D investment |
Manufacturer Profile Scorecard
| Criteria | Weight | Scoring |
|---|---|---|
| Years in business | 10% | > 20 years = 10 pts, 10–20 = 7 pts, < 10 = 3 pts |
| Machines installed | 15% | > 500 = 15 pts, 100–500 = 10 pts, < 100 = 5 pts |
| Service network | 20% | Global = 20 pts, Regional = 12 pts, Local only = 5 pts |
| R&D investment | 10% | > 5% of revenue = 10 pts, 2–5% = 6 pts, < 2% = 2 pts |
| Quality certifications | 15% | ISO 9001 + industry-specific = 15 pts, ISO 9001 only = 10 pts |
| Customer references | 20% | 5+ verifiable references = 20 pts, 2–4 = 12 pts, < 2 = 5 pts |
| Financial stability | 10% | Profitable 5+ years = 10 pts, profitable 2–4 years = 6 pts |
Factory Audit Checklist
Manufacturing Capability
| Area | What to Assess | Red Flags |
|---|---|---|
| Machine bed machining | How are beds machined? Age of machine tools? | Outsourced bed machining, old equipment |
| Spindle assembly | Clean room or controlled area for spindle build | Spindles assembled on open shop floor |
| Guideway scraping | Hand scraping quality, contact pattern | No scraping being done on site |
| Electrical cabinet build | Wiring quality, labelling, layout | Poor wiring, no labelling |
| Coolant system fabrication | Weld quality, tank construction | Poor welds, no pressure testing |
| Assembly area | Cleanliness, organisation (5S) | Dirty, disorganised, parts on floor |
Quality Control
| Check Point | What to Verify |
|---|---|
| Incoming inspection | How are purchased components (ball screws, pumps, bearings) inspected? |
| In-process inspection | What is checked during assembly? Frequency? |
| Final testing | Are all machines run under load before shipment? Test duration? |
| Measurement equipment | Calibration status of all gauges and instruments |
| Quality records | Are records kept? Can they trace a specific machine? |
| Non-conformance process | How are defects documented and corrected? |
Tip: Ask to see the quality records for a machine similar to what you are buying. If the manufacturer cannot produce complete quality documentation for a recently shipped machine, they cannot produce it for yours either.
Service and Support Capability
| Factor | What to Assess | Questions to Ask |
|---|---|---|
| Service engineers | Number, location, qualifications | How many field service engineers do you employ? |
| Spare parts inventory | Stock levels for common parts | What is your fill rate for emergency parts orders? |
| Response time | Guaranteed response for different regions | What is your maximum response time for our location? |
| Remote support | Remote diagnostic capability | Can you connect to the machine remotely for diagnostics? |
| Training offerings | Operator and maintenance training | What training programs do you offer? In-house or on-site? |
| Documentation quality | Manuals, drawings, schematics | Are electrical schematics and mechanical drawings provided? |
Financial Stability Assessment
Financial Health Indicators
| Indicator | What to Check | Warning Sign |
|---|---|---|
| Company ownership | Public, private, or private equity owned | Multiple ownership changes in 5 years |
| Revenue trend | Growing, stable, or declining | Year-over-year revenue decline |
| Order backlog | Published or disclosed backlog | Declining backlog |
| Employee count | Stable or fluctuating | Significant recent layoffs |
| Warranty claims ratio | Ratio of warranty cost to revenue | High or increasing warranty claims |
| Litigation | Pending or past lawsuits | Multiple customer lawsuits |
Warning: A manufacturer with declining financial health may still deliver your machine, but future service and spare parts support may be compromised. If a manufacturer goes out of business within 3–5 years of your purchase, your machine becomes an orphan with no OEM support.
Customer Reference Verification
Reference Call Guide
| Question | What the Answer Should Reveal |
|---|---|
| When did you buy the machine, and what model? | Confirms reference is recent and relevant |
| What is the machine's uptime percentage? | Reliability in production |
| How responsive is the manufacturer's service? | Real-world service quality |
| What major repairs have been needed? | Common failure modes |
| Would you buy from them again? | Overall satisfaction |
| What do you wish you had known before buying? | Lessons learned |
Red Flags in References
- Reference is only willing to provide written testimonial (no phone call)
- Reference is located in a different region with different service support
- Reference has only owned the machine for a few months
- Manufacturer provided the reference contact — may be pre-screened
- Reference uses the machine for a completely different application than yours
FAQ
Should I visit the factory before buying a deep hole drilling machine?
Yes. For any machine over $200,000, a factory visit is essential. You cannot assess build quality, assembly practices, or quality control from brochures. The cost of a factory visit (travel, time) is a fraction of the risk of buying from an unqualified manufacturer.
How many manufacturers should I evaluate before deciding?
Evaluate 3–5 manufacturers. Too few does not provide market perspective. Too many becomes unmanageable. Shortlist 3 manufacturers for detailed evaluation and factory visits, then rank them using your weighted scorecard.
What is the most important factor in manufacturer evaluation?
Service and support capability. The best machine in the world is useless if you cannot get spare parts and service when something breaks. A manufacturer with local service engineers and a well-stocked spare parts warehouse is worth a premium over one without.
How do I verify a manufacturer's quality claims?
Ask for specific quality records for a recently built machine: spindle runout measurements, guideway straightness readings, ball screw backlash measurements, and coolant pressure test results. A manufacturer with real quality control will have these records and be willing to share them.
Should I consider manufacturers from lower-cost countries?
Yes, but adjust your evaluation criteria accordingly. Lower initial cost often means lower service capability, longer spare parts lead times, and fewer local references. Factor the total cost of ownership — including potential downtime from delayed service — into your decision.
Manufacturer evaluation requirements vary by machine type, application, and location. Adapt this guide to your specific needs and budget. This article reflects industry practice as of 2026.