Checklist: 8 Points for Progressive Die First Article
This progressive die first article checklist provides eight practical checks for verifying a new die before full production. It covers die setup, part dimensions, surface finish, and process stability. Use it to catch stamping QA issues early and reduce scrap costs during the initial production runs.
- Verify all part dimensions and critical features against the drawing before releasing the first article for production.
- Check the die setup for proper alignment, clearance, and lubrication to prevent early wear or misalignment.
- Inspect part surface finish and burr levels to ensure the stamping process meets the required quality standards.
- Confirm that the press and die are running at the correct speed and pressure for a stable, repeatable output.
- Document all findings and deviations clearly so that the stamping QA team can review them before full production begins.
Why a First Article Check Matters for Progressive Dies
A progressive die first article check is not a formality. It is the last line of defense between a well-designed die and a production run full of scrap. When a new die enters service, small setup errors or minor material variations can compound quickly across hundreds of parts per minute. A single misplaced punch or a slightly off clearance can cause burrs, misfeeds, or part rejection.
The goal of the first article inspection is to verify that the die produces parts that match the drawing. It covers dimensions, surface quality, and process behavior. By catching these issues early, the plant avoids rework, die adjustment costs, and downtime. This checklist is designed for engineers and quality teams who need a structured, practical way to validate a new progressive die before shifting to full production.
Section 1: Verify the Die Setup and Alignment
The first point of the progressive die first article checklist is to confirm that the die is correctly mounted and aligned on the press. A die that sits unevenly will cause uneven wear, part variation, and early failure. Before running parts, check the die base for levelness and ensure the mounting bolts are torqued evenly.
A common mistake is assuming that the die was set up correctly during installation. Even if the die was aligned in the shop, the press bed may have shifted. Look for any visible gaps between the die and the press plate. If the die rocks or tilts, stop the line and correct it.
Red flags to watch for:
- Die base not level on the press bed
- Mounting bolts showing uneven torque or missing
- Visible gaps or rocking when the die is lifted
- Punches or plates not seated fully in the die
A misaligned die will show up in the part dimensions and surface finish. Correcting it before production saves hours of troubleshooting later.
Section 2: Confirm Material Feed and Clearance
The second point focuses on material feed and die clearance. Progressive dies rely on a consistent flow of sheet metal through multiple stations. If the feed is uneven, parts will shift, and critical dimensions will drift. Check the feed dogs, guides, and any stop blocks to ensure they are clean and properly adjusted.
Clearance between the punch and die is another key area. Too tight a clearance causes high tonnage, early wear, and rough part edges. Too loose a clearance creates burrs and inconsistent part shapes. Measure the clearance at several points around the punch and die. Compare the measurements to the specification.
Red flags to watch for:
- Feed dogs not engaging the sheet consistently
- Material shifting between stations
- Burrs on part edges, especially at the shear line
- Clearance measurements outside the specified range
If the material feed is unstable, the first article inspection will fail. The die may be good, but the setup is not ready for production.
Section 3: Inspect Part Dimensions Against the Drawing
The third point is the core of the first article inspection. Measure all critical dimensions on the first set of parts. Use calibrated gauges or CMMs depending on the part complexity. Compare each measurement to the drawing tolerance. Do not rely on visual inspection alone.
Pay close attention to the most critical features. Hole locations, flatness, and bend angles are common failure points in progressive dies. If a dimension is out of tolerance, stop the run. Determine whether the issue is with the die, the material, or the press setup.
Red flags to watch for:
- Hole locations off by more than the specified tolerance
- Flatness deviation visible with a straightedge
- Bend angles not matching the drawing
- Part thickness variation beyond acceptable limits
A single out-of-tolerance part does not always mean the die is defective. Sometimes the material batch has a thickness variation. But if multiple parts show the same deviation, the die needs adjustment.
Section 4: Check Surface Finish and Burr Levels
The fourth point addresses surface finish and burr levels. Progressive dies often produce parts that go directly into assembly. Surface defects can cause rejection even if dimensions are within tolerance. Inspect the part surfaces under magnification. Look for scratches, marks, or roughness caused by the die.
Burr levels are a direct indicator of die condition. Excessive burrs on the shear line suggest that the clearance is too loose or the tooling is dull. Check both sides of the part. A burr on one side may indicate a one-sided clearance issue.
Red flags to watch for:
- Visible scratches or marks on part surfaces
- Burrs on the shear line that exceed the specified limit
- Roughness on bend lines or flanges
- Surface marks that repeat in the same location on every part
Surface finish issues are often hard to detect with the naked eye. Use a magnifying glass or a simple light source to inspect the parts. A small scratch can become a quality issue when the part is assembled into a larger system.
Section 5: Evaluate Process Stability and Press Performance
The fifth point is to evaluate process stability and press performance. A progressive die must run at a consistent speed and pressure to produce uniform parts. Run the die for a set number of cycles, such as 100 to 200, before taking the first article samples. This allows the die to reach a steady state.
Monitor the press for any unusual noise, vibration, or pressure spikes. If the press load fluctuates, the parts will vary. Check the press controls to ensure the speed and pressure are set correctly for the die. Compare the readings against the die manufacturer’s recommendations.
Red flags to watch for:
- Press load fluctuating during the run
- Unusual noise or vibration from the die
- Parts varying in thickness or shape over the first 100 cycles
- Press speed not matching the die design
A stable process is the foundation of a reliable first article inspection. If the press is not stable, no amount of die adjustment will produce consistent parts.
Section 6: Review the First Article Documentation
The sixth point is to review the first article documentation. The first article inspection must be recorded in a format that the quality team can review. This includes part dimensions, surface finish notes, burr levels, and any deviations. The documentation should reference the drawing number and revision.
A common mistake is recording only the pass or fail status without details. If a dimension is out of tolerance, note the actual measurement and the specified tolerance. This information helps the die team decide whether to adjust the die or scrap the parts.
Red flags to watch for:
- Missing measurements for critical dimensions
- No reference to the drawing revision
- Deviations not clearly described
- No sign-off from the quality engineer
The first article documentation is not just a record. It is a tool for continuous improvement. If the die team sees a pattern in the deviations, they can make targeted adjustments before the next production run.
Section 7: Confirm the Go or No-Go Decision
The seventh point is to confirm the go or no-go decision. After reviewing all the first article inspection results, the quality team must make a clear decision. If all points pass, the die is released for production. If any point fails, the die is held for correction.
A no-go decision should not be a formality. If a part fails a critical dimension, the die is not ready. If a surface defect is present, the die may need polishing or adjustment. Document the reason for the no-go and the corrective action required.
Red flags to watch for:
- Releasing the die with known defects
- No clear corrective action plan
- No re-inspection after correction
- Missing sign-off from the quality engineer
The go or no-go decision is the final gate. It separates a verified die from a die that needs work. Making this decision clearly and quickly prevents costly delays and scrap.
Section 8: Plan for Ongoing Stamping QA
The eighth point is to plan for ongoing stamping QA. The first article inspection is only the beginning. Progressive dies will wear over time, and material variations will occur. The quality team needs a plan for ongoing checks.
This plan should include periodic first article inspections, for example at the start of each shift or after a material change. It should also include checks for die wear, such as burr levels and surface finish. If the die is for high-volume parts, consider adding automated inspection or smart die monitoring to catch issues early.
Red flags to watch for:
- No plan for periodic first article inspections
- No checks for die wear over time
- No process for handling material changes
- No review of first article data after production starts
The first article inspection is a snapshot. Ongoing stamping QA is the practice that keeps the die performing. A simple plan can save significant cost and downtime.
Summary of the Progressive Die First Article Checklist
| Check Point | What to Verify | Common Failure Mode |
|---|---|---|
| Die Setup and Alignment | Die level, bolt torque, punch seating | Uneven wear, part variation |
| Material Feed and Clearance | Feed dogs, clearance, burrs | Shifting parts, excessive burrs |
| Part Dimensions | Critical features, hole locations, flatness | Out-of-tolerance parts |
| Surface Finish and Burrs | Scratches, marks, burr levels | Surface defects, assembly issues |
| Process Stability | Press speed, pressure, cycle consistency | Part variation, press issues |
| First Article Documentation | Measurements, deviations, sign-off | Missing data, unclear decisions |
| Go or No-Go Decision | Clear release or hold, corrective action | Releasing defective dies |
| Ongoing Stamping QA | Periodic checks, die wear, material changes | Long-term die failure |
A Practical Example
A plant introduced a new progressive die for a metal bracket. The first article inspection caught a 0.1 mm deviation in one hole location. The die clearance was also 0.05 mm tighter than specified. The plant held the die, adjusted the clearance, and re-ran the first article. After the adjustment, the parts passed. Without the first article inspection, the plant would have run thousands of defective brackets before noticing the issue.
This example shows the value of a structured progressive die first article checklist. It is not about finding every possible defect. It is about catching the issues that matter most, before they become a production problem.
Final Thoughts
The progressive die first article checklist is a practical tool for verifying a new die before full production. It covers die setup, part dimensions, surface quality, and process stability. By following the eight points, engineers and quality teams can catch issues early and reduce scrap costs. The checklist is not a one-time task. It is the foundation for ongoing stamping QA and long-term die performance.
Frequently asked questions
How many parts should be inspected for the first article?
Typically, the first 10 to 20 parts are inspected for the initial first article. After that, a set of parts is measured and recorded. The exact number depends on the part complexity and the company's quality standard.
What is the difference between a first article inspection and a regular quality check?
A first article inspection is a one-time verification of a new die or process. A regular quality check is an ongoing monitoring of the production process. The first article inspection confirms the die is ready, while regular checks confirm it stays ready.
Can the first article inspection be done with manual gauges?
Yes, manual gauges are suitable for many parts. For complex parts or tight tolerances, a CMM or automated inspection system may be needed. The method should match the drawing requirements.
What if the die passes the first article but fails later in production?
A die can pass the first article and still fail later due to material changes, die wear, or press issues. Ongoing stamping QA checks are needed to catch these issues. The first article inspection is a starting point, not a guarantee.
How often should a first article inspection be repeated?
It depends on the production plan. A common practice is to repeat the first article inspection at the start of each shift, after a material change, or after a die adjustment. The frequency should be defined in the quality plan.
