- What This Cheat Sheet Covers (and What It Cannot)
- The Credential at a Glance
- The Two-Part Path: Skill Checks, Then Theory
- The Five Duty Areas: Job Planning Through Final Runoff
- The Nine Supporting Knowledge Areas
- Numbers You Can Rely On and Items Still on Hold
- Who Values This Credential
- A Domain-Sequenced Review Plan
- Frequently Asked Questions
- Diemaking Level III is issued by the National Institute for Metalworking Skills (NIMS) and targets advanced work on complex dies.
- The scope lists 14 areas: five duty areas (Domains 1-5) and nine supporting knowledge, skills, abilities and other characteristics (KSAO) areas (Domains 6-14).
- Practical skill checks require 100% of applicable process and product standards met without assistance; that is not a written-test cut score.
- Passing score, question count, written-test duration and fees remain unconfirmed; do not trust any site quoting exact figures.
What This Cheat Sheet Covers (and What It Cannot)
A good cheat sheet compresses what is known and is honest about what is not. This one does both. Diemaking Level III is a NIMS credential built on the Duties and Standards for Diemaking Skills, Level III, a competency standard dated September 2000. That standard describes what an advanced diemaker is expected to do and know. It does not publish a weighted exam blueprint, and it does not tell you how many written questions you will face or what score clears the bar.
So this page does three things: it lays out the verified structure of the credential, it summarizes the competencies you should be able to demonstrate in each of the 14 areas, and it flags the logistics that must be confirmed directly with NIMS or a registered NIMS organization. If you want a deeper walk-through of each area, see our complete guide to all 14 Diemaking Level III content areas. If you want a full preparation plan, start with the Diemaking Level III study guide.
The Credential at a Glance
| Item | What the Sources Support |
|---|---|
| Credential name | Diemaking Level III |
| Issuer | National Institute for Metalworking Skills (NIMS) |
| Scope document | Duties and Standards for Diemaking Skills, Level III (September 2000) |
| Focus | Advanced work on complex dies: team leadership, assembly, tryout and runoff |
| Structure | 5 duty areas plus 9 supporting KSAO areas (14 headings in total) |
| Weighting | Unweighted competency standards; no official domain percentages |
| Assessment evidence | Credentialing Achievement Record (CAR) with practical Skill Checks, plus online theory testing |
| Membership pricing | Not applicable; NIMS is not a membership organization |
For a plain-language orientation to the credential itself, our explainers on what Diemaking Level III certification is and what the name stands for cover the basics.
The Two-Part Path: Skill Checks, Then Theory
The distinctive feature of this credential is that it is not a walk-in multiple-choice test. According to the CAR, you establish eligibility for the Level III written examination by documenting performance first. The record requires:
- Documented workplace competency across the Level III work elements
- Practical skill checks evaluated against Official Performance Assessment Checklists
- Attestations from both the supervisor or evaluator and the candidate
- An affidavit of successful performance confirming the work was completed
The NIMS credential list describes the overall model as performance assessment at a training site plus online theory testing. General NIMS policy adds that a registered NIMS organization registers candidates and that online theory examinations require a proctor.
The 100% Standard Explained
The skill checks require every applicable process and product standard to be met, without assistance, within company-specific completion times and safety requirements. This is a quality-of-work standard applied to hands-on tasks. It is easy to misread as a written-exam passing score of 100%, and it is not one. It also should not be confused with test duration: practical task time is not written-test time. If you are hunting for the written cut score, our page on the Diemaking Level III passing score explains what is and is not confirmed.
Attempts and Lockouts
NIMS general policy permits two attempts before a 30-day lockout. That is a general NIMS statement; confirm with your registered organization how it applies to this specific legacy credential before you plan a retake schedule around it.
The Five Duty Areas: Job Planning Through Final Runoff
Domains 1 through 5 follow the life of a complex die from planning to production release. Think of them as one continuous story rather than five separate topics.
Domain 1: Job Planning
Before any metal is cut or fitted, the Level III diemaker plans the job and, in many shops, leads the team executing it.
- Interpreting die prints, bills of material and process requirements
- Sequencing operations and anticipating material, tooling and machine needs
- Coordinating work among team members and identifying risks early
Domain 2: Die Assembly
Assembly is where precision machining meets fitting skill on complex dies.
- Fitting and aligning components so the die functions as designed
- Verifying clearances, alignment and fastening integrity
- Integrating details that complex dies add, such as sensors (see Domain 13)
Domain 3: Adjustments
Note the plural: the detailed duty heading is "Adjustments," while the framework overview uses the singular "Adjustment." Expect either form in source documents.
- Correcting die performance based on observed part and process results
- Making controlled changes and confirming their effect
- Documenting what was changed so results are repeatable
Domain 4: Final Tryout
Tryout is where the die proves itself under working conditions.
- Running the die and evaluating the parts it produces against specification
- Diagnosing defects and tracing them to die conditions
- Deciding when the die is ready to advance
Domain 5: Final Runoff
Runoff confirms the die is ready for production.
- Verifying consistent part quality across a run
- Confirming the die performs safely and reliably
- Completing the handoff with accurate documentation
If you are curious how demanding this sequence is in practice, our analysis of how hard the Diemaking Level III exam is breaks down where candidates tend to feel the most pressure.
The Nine Supporting Knowledge Areas
Domains 6 through 14 are the knowledge, skills, abilities and other characteristics that make the duty areas possible. These are the areas most likely to surface in theory testing, so give them real attention even if your daily work is purely hands-on.
People and Problem-Solving Skills (Domains 6-8)
- Domain 6: Written and Oral Communications. Clear instructions, accurate reports and effective communication with team members, engineers and customers.
- Domain 7: Decision Making and Problem Solving. Structured troubleshooting, weighing options and choosing corrective actions under production pressure.
- Domain 8: Social Skills and Personal Qualities. Dependability, teamwork and leadership behaviors, which matter because Level III includes team leadership.
Technical Knowledge (Domains 9-14)
Domain 9: Engineering Drawings and Sketches
Reading complex die drawings and producing clear sketches to communicate changes.
- Interpreting dimensions, tolerances and geometric requirements
- Translating a verbal or on-the-floor problem into a usable sketch
Domain 10: Measurement
Choosing the right instrument and using it correctly.
- Matching measuring tools to the tolerance being checked
- Understanding how measurement error and technique affect decisions
Domain 11: Metalworking Theory
The machining and materials background behind diemaking work.
- Cutting, forming and finishing principles that affect die components
- Material behavior and its effect on how parts are made
Domain 12: Metalforming Theory
How sheet and strip behave when the die does its job, and why defects appear.
- Forces, deformation and material flow in forming operations
- Linking observed part defects to die and process conditions
Domain 13: Sensors
The monitoring devices that protect complex dies and confirm correct operation.
- Purpose and placement of sensors within a die
- Basic troubleshooting when a sensor signals a fault
Domain 14: Safety and Environment
Safe work practices around presses, dies, lifting and shop hazards, plus environmental responsibility.
- Hazard awareness during assembly, tryout and runoff
- Safe handling and storage practices
Key Takeaway
Do not over-study the glamorous duty areas and neglect Domains 9 through 14. Drawings, measurement, metalforming theory and safety are the topics most easily tested in a written format, and they are also where experienced hands-on diemakers often have unexamined gaps.
Numbers You Can Rely On and Items Still on Hold
The most valuable thing a cheat sheet can do is separate confirmed facts from open questions. Here is the line as of our October 6, 2026 public-source review.
| Topic | Status |
|---|---|
| Issuer is NIMS | Confirmed |
| 5 duty areas + 9 supporting areas | Confirmed in the standard |
| Skill checks require 100% of applicable standards, unassisted | Confirmed in the CAR |
| Two attempts, then a 30-day lockout | General NIMS policy; confirm for this credential |
| Proctor required for online theory exams | General NIMS policy |
| No minimum age, degree or work-experience hours | General NIMS access policy |
| Question count | Unconfirmed |
| Written-test duration | Unconfirmed |
| Passing score | Unconfirmed |
| Fees and renewal rules | Unconfirmed |
| Current registration availability and exam identifier/revision | Unconfirmed |
Prerequisites: Handle with Care
The standard assumes Level II diemaking skills and substantial Level III machining skills. The CAR's opening guidance refers to Level II diemaking and intermediate Level II machining skills, while its work elements explicitly include CNC operations. Those phrasings are not identical, so confirm with the issuer how legacy requirements are applied rather than assuming a universal prior-credential prerequisite.
You may also see third-party career directories, including O*NET-linked listings, marking more than two years of experience as required. Do not treat that as the exact-exam eligibility rule over issuer guidance. For a fuller treatment, read our guide to Diemaking Level III requirements.
Cost and Pricing
Because NIMS is not a membership organization, there is no member/nonmember fee split to chase. Actual costs depend on fees set through the registered organization and testing arrangements, and the specific amounts remain unconfirmed. Our certification cost breakdown explains how to think about the cost components without relying on invented figures.
Reference Materials
The performance standards mention calculators and the Machinery's Handbook. Those mentions do not establish what you may bring to the written examination. Ask your proctor or registered organization about permitted materials before test day, and never assume handbook access.
Who Values This Credential
The credential maps to environments where complex dies are built, tried out and maintained, so the likeliest audiences are tool and die shops, stamping and metalforming manufacturers, and in-house tooling departments that support press operations. The "team leadership" emphasis in the standard also signals relevance to lead diemaker and tooling supervisor roles. We do not publish salary numbers here because none can be verified against this specific credential; our salary guide and jobs overview discuss earnings and roles in qualitative terms, and our worth-it analysis helps you weigh the return for your situation.
A Domain-Sequenced Review Plan
Rather than a generic schedule, sequence your review in the order the work actually flows, so each week builds on the last. Adjust the length to your own timeline.
Foundations: Domains 9, 10 and 14
- Drawing interpretation, sketching and measurement selection
- Safety and environmental practices, since every later domain depends on them
Theory: Domains 11, 12 and 13
- Metalworking and metalforming theory, linking defects to causes
- Sensor purpose, placement and fault logic
The Build Sequence: Domains 1 and 2
- Job planning and sequencing
- Assembly fitting and verification
Proving the Die: Domains 3, 4 and 5
- Adjustments, tryout diagnosis and runoff confirmation
People Skills and Full Review: Domains 6, 7 and 8
- Communication, decision-making and leadership scenarios
- Timed mixed practice across all 14 areas
Place the theory-heavy domains before the process domains because they give you the vocabulary to reason about tryout and runoff problems. When you are ready to test yourself, use our Diemaking Level III practice tests to find weak spots across all 14 areas, and check the official-source guidance on exam dates and scheduling before you commit to a timeline.
Frequently Asked Questions
The National Institute for Metalworking Skills (NIMS) is the governing and certifying body. NIMS is the issuer, not an exam abbreviation, and it is not a membership organization.
These details are unconfirmed. The question count, written-test duration and passing score could not be verified from accessible sources, so rely on your registered NIMS organization for current figures. See our pass rate page for what data is and is not available.
No. It applies to the practical skill checks, where all applicable process and product standards must be met without assistance, within company-specific completion times and safety requirements. It is not a written cut score or a candidate pass rate.
The standard assumes Level II diemaking skills, and the CAR's guidance references Level II as well, but the sources do not establish a universal prior-credential prerequisite. Confirm how the issuer applies these legacy requirements to your situation.
General NIMS access policy specifies no minimum age, degree or work-experience hours. Some third-party career directories list experience expectations, but those should not override issuer guidance for exact-exam eligibility.