Aluminum Extrusion Die Bearing Inspection and Nitride Log
Track die bearing condition, nitriding history, and profile quality risks for aluminum extrusion window profile dies in one inspection log. Use it to catch wear, drift, and surface defects before the die goes back into production.
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Built for: Aluminum Extrusion · Window And Door Manufacturing · Metal Fabrication · Tooling And Die Shops
Overview
This template is an inspection and maintenance log for aluminum extrusion dies used on window profile production. It records the die ID, cavity number, press number, profile family, inspection time, and inspector, then walks through bearing condition, nitriding history, profile quality risk indicators, and release approval. The goal is to connect what the die looks like to what the profile is doing on the press, so wear, pickup, cracks, or geometry drift are documented before the die goes back into service.
Use this template when a die comes out of the press for cleaning or maintenance, after a dimensional complaint, after surface defects appear on the profile, or after nitriding work is completed. It is especially useful for dies that are sensitive to bearing wear or that have a history of repeat drift. The form gives you a consistent record of bearing length, land geometry, nitriding depth or hardness, and any corrective work performed.
Do not use it as a substitute for a full metallurgical report when a die has suffered major damage, heat checking, or structural failure. It is also not the right tool for unrelated press maintenance, general equipment inspections, or non-die quality checks. If the die is not being released for production, leave the release section incomplete and route the issue through your repair or non-conformance process instead.
Standards & compliance context
- This template supports ISO 9001-style control of tooling, traceability, and non-conformance documentation by capturing inspection results, corrective action, and release approval.
- For plants operating under formal occupational safety or quality systems, the log helps show that critical tooling is reviewed before return to service and that defects are dispositioned by an authorized person.
- If your facility uses internal acceptance criteria for bearing wear, nitriding depth, or hardness, those limits should be built into the form so the inspection result is objective and repeatable.
- Where customer specifications or plant procedures govern profile finish and dimensional stability, this record provides the evidence trail for tool condition and maintenance history.
General regulatory context for orientation only — verify current requirements with counsel or the relevant agency before relying on this template for compliance.
What's inside this template
Inspection Details
This section establishes traceability so every finding can be tied to the exact die, press, profile family, and inspection event.
- Die ID / cavity number recorded
- Press number and profile family recorded
- Inspection date and time
- Inspector name and die shop or pressroom location
Die Bearing Condition
This section matters because bearing damage, wear, and geometry changes are the most direct indicators of whether the die can still produce acceptable profile quality.
- Bearing surfaces free of scoring, galling, and pickup
- No visible cracks, chips, or edge breakage on bearing land
- Bearing wear or polish pattern is within acceptable limit
- Bearing length and land geometry measured
- Bearing condition photo captured
Nitriding Cycle Log
This section tracks heat-treatment history so the shop can confirm the die's surface condition and maintenance status before reuse.
- Most recent nitriding date recorded
- Number of nitriding cycles completed
- Nitriding depth or hardness result recorded
- Nitriding cycle status matches die maintenance record
Profile Quality Risk Indicators
This section connects tooling condition to what the profile is actually doing on the line, which helps identify whether the die is driving the defect.
- Observed or reported dimensional drift linked to this die
- Surface defects associated with die condition
- Profile exit surface finish acceptable for window profile production
- Die health status
Corrective Work and Release
This section documents what was fixed, who approved it, and whether the die is cleared to return to production.
- Corrective work performed
- Corrective action details documented
- Die released for production use
- Supervisor or die shop approval signature
How to use this template
- Enter the die ID, cavity number, press number, profile family, inspection date and time, and the inspector or location before starting the walk-through.
- Inspect the bearing surfaces for scoring, galling, pickup, cracks, chips, edge breakage, and abnormal wear or polish patterns, then measure bearing length and land geometry.
- Record the most recent nitriding date, total nitriding cycles, and the hardness or depth result, and confirm that the cycle status matches the maintenance record.
- Note any dimensional drift, surface defects, or exit finish concerns that have been linked to the die during production.
- Document the corrective work performed, add the release decision, and obtain supervisor or die shop approval before the die returns to production.
Best practices
- Photograph the bearing surface at the time of inspection so later wear comparisons are based on the same condition, not memory.
- Record actual measurements for bearing length and land geometry instead of writing only acceptable or not acceptable.
- Tie every dimensional drift note to the specific profile family and press number so recurring issues can be traced to the right tooling setup.
- Separate cosmetic surface marks from true bearing damage, and flag only defects that can affect extrusion quality or die life.
- Verify nitriding records against the maintenance log before release, especially when the die has been reworked or transferred between shops.
- Treat cracks, chips, and edge breakage on the bearing land as critical findings that require disposition before production use.
- Use the corrective work field to describe exactly what was done, such as polishing, regrinding, or bearing repair, rather than writing repaired.
- Require a supervisor or authorized die shop approver to sign release after the inspection record is complete.
What this template typically catches
Issues teams running this template most often surface in practice:
Common use cases
Frequently asked questions
What does this die inspection and nitride log cover?
This template covers the condition of the die bearing surfaces, the most recent nitriding cycle, profile quality risk indicators, and any corrective work needed before release. It is built for aluminum extrusion window profile dies where bearing wear, pickup, and dimensional drift can affect product quality. The log also captures approval to return the die to service so maintenance and production stay aligned.
When should this template be used?
Use it after die cleaning, during scheduled die maintenance, after a quality complaint tied to a specific die, and before releasing a repaired die back to the press. It is also useful when a die shows changing dimensions, surface finish issues, or signs of galling. If the die has not been serviced or inspected, this log should not be used as a release record.
Who should complete the inspection?
A die shop technician, tooling engineer, or qualified inspector should complete the condition checks, with a supervisor or authorized approver signing the release. In many plants, the pressroom may report the issue, but the actual bearing assessment should be done by someone who can judge wear, geometry, and nitriding condition. The person signing off should be able to verify the corrective work and the die's readiness for production.
Does this template support quality or compliance programs?
Yes. It supports ISO 9001-style control of tooling condition, traceability, and non-conformance handling by documenting what was found, what was corrected, and who approved release. It also fits internal quality systems that require maintenance records for critical tooling. While it is not a regulatory form by itself, it helps show controlled process discipline.
What are the most common mistakes when using this log?
Common mistakes include recording only a pass/fail result without measuring bearing length or noting wear patterns, skipping the photo of the bearing surface, and failing to link dimensional drift back to the specific die. Another frequent issue is releasing a die after corrective work without documenting the exact action taken or the approval signature. Those gaps make it hard to diagnose repeat defects later.
How often should nitriding cycles be recorded?
Record the nitriding cycle every time the die is nitrided, re-nitrided, or otherwise heat-treated in a way that affects bearing hardness or depth. The log should also show the total number of cycles completed so the shop can spot dies approaching their maintenance limit. If your shop uses a fixed maintenance interval, this template can be adapted to match that cadence.
Can this template be customized for different press lines or profile families?
Yes. You can add fields for press tonnage, alloy series, profile family, bearing land dimensions, or shop-specific acceptance limits. Many teams also add links to lab reports, hardness test results, or photo attachments. The structure is flexible enough to support one pressroom or multiple plants.
How does this compare with an ad hoc notebook or spreadsheet?
An ad hoc note often misses the details needed to explain why a profile drifted or why a die was released too early. This template creates a repeatable record for condition, nitriding history, and corrective action in one place. That makes it easier to compare dies, spot recurring wear patterns, and hand off work between shifts or departments.
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