Diemaking Level II
Credential: Diemaking Level II
Credentialing Agency: National Institute for Metalworking Skills, Inc (NIMS)
The Diemaking Level II certification is an intermediate-journeyman level credential recommended for machinists with experience and skill in diemaking. The NIMS Credentials certify an individual's skills as measured against the NIMS Standards. The Diemaking Level II credential assesses a machinist's ability to inspect materials, die components, features and details, as well as to plan a job and set up a workstation.
More information can be found on the certifying agency's website.
Diemaking Level II
The following DOD Civilian Occupations provide training and/or experience that contributes to attaining this credential:
The following Federal Occupations provide training and/or experience that contribute to attaining this credential:
| Federal Occupation | Related As | |
|---|---|---|
| 3416 Toolmaking |  Some |
|
| 3808 Boilermaking | Some |
|
| 4352 Plastic Fabricating | Some |
|
| 4714 Model Making |  Other |
MINIMUM REQUIREMENTS
Eligibility Requirements (View Details)
- Credential Prerequisite
- Experience
- Education
- Training
- Membership
- Other
- Fee
Note: This credential may have multiple options for becoming eligible. Listed are the minimum requirements based on the minimum degree required. To view other options, see the Eligibility tab.
Exam Requirements (View Details)
- Exam
- Written Exam
- Oral Exam
- Practical Exam
- Performance Assessment
AGENCY CONTACT INFORMATION
National Institute for Metalworking Skills, Inc (NIMS)
10565 Fairfax Boulevard
Suite 203
Fairfax, VA 22030
Phone: (703) 352-4971
Fax: (703) 352-4991
Email: NIMS@nims-skills.org
Other REQUIREMENTS
The Diemaking Level II credential has the following other requirements:
- Must be at least 18 years old or at least 16 years old if enrolled in a NIMS-certified or state-authorized machining program in a public or private school.
- Diemaking certifications offered by NIMS require completing Credentialing Achievement Records (CARs).
Written Exam
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Job Planning
- Review Design, Part Print, and Customer Quality Standards
- Determine Required Process Plan to Complete Die/Tool in Allotted Time
-
General Machining and Bench Work
- Lay Out Details for Manual Machining Operations
- Machine Details to Die Design Prints Using Standard Tool Room Equipment
- Prepare Details for CNC Milling Operation
- Prepare Trim Punches and Trim Steels for Wire Burn, CNC Milling, or CNC Jig Grinding Operations
- Use Hand Tools on Contoured Steels from CNC Milling Operations
- Grind/Mill or Wire EDM All Other Details to Finished Size After Heat Treat
-
Die Assembly
- Mount Form Steels, Form Pads, Nitrogen Units, and Pierce Station to Die Set
- Dry Run Die to Stop Blocks
- Assemble Die for Development Process
-
First Tryout
- Set Up Die in Tryout Press
- Spot Form Steels
- Develop Draws and Forms
- Develop Trim Lines
- Validate Part
-
Final Assembly
- Make Required Adjustments As Determined
- First Tryout
- Mount All Remaining Die Details to Die Set
- Dry Run Die to Stop Blocks
- Assemble Die for Final Tryout
-
Final Tryout
- Set Up All Dies in Tryout Presses
- Perform Corrective Actions Required to Assure Stamped Part Conformance
- Assure Production Readiness of Die or Tool
- Particpate in Final Runoff
Practical Exam
- Job Processing Planning: Given a part with a finished layout and access to appropriate machine tools, produce an operation sheet detailing the process plan and required speeds and feeds. Provide sketches and special instructions as needed.
- Turning Operations (Centers Cylindrical and Taper Turning): Given raw material, a process plan, print, hand, precision, and cutting tools, as well as access to an appropriate turning machine and its accessories, produce a part matching the process plan and the print specifications using appropriate trade techniques and speeds and feeds. The part specified should have at least two straight diameters within +/-.001, an appropriate taper at each end of the part, and requires a reversal of the part end for end.
- Production (Turning Machine): Given a turning machine, part print, necessary tooling, and material, produce a group of parts to required specifications. The part should be similar to a shoulder bushing. The major OD should be 1", the minor OD .750, the ID 1/2", and the overall length should be 1 1/4". The lot size should be 15.
- Turning Operations (Chucking, OD and ID Tapers Using a Taper Attachment): Given raw material, a process plan, a print, hand, precision, and cutting tools, as well as access to an appropriate turning machine with a taper attachment and its accessories, produce a part matching the process plan and the print specifications using appropriate trade techniques and speeds and feeds. The part specified should have at least two diameters within +/-.002, one bore within +/-.002, one external and one internal taper, and require at least two chuckings or other workholding setup.
- Milling (Square Up a Block): Given raw material, a process plan, a print, hand, precision, and cutting tools, as well as access to an appropriate milling machine and its accessories, produce a part matching the process plan and the print specifications. The part will require squaring-up from the raw state.
- Vertical Mill (Precision Boring): Produce three bores to specification. The part will specify 3 holes in a 1" plate. The holes will be between 3/4" and 1 1/2" to locations within +/-.001 and hold diameters within +/-.0005. One hole is to be counterbored to a decimal depth holding +/-.002 and counterbore diameter within +/-.005.
- Rotary Tables: Given raw material, a process plan, a print, hand, precision, and cutting tools, as well as access to an appropriate milling machine, an appropriately sized rotary table and accessories, produce a part matching the process plan and the print specifications. The part specified will require two groups of holes arrayed on bolt circles and several surfaces at various angles to one another.
- Divide Head Operations: Given raw material, a process plan, a print, hand, precision, and cutting tools, as well as access to an appropriate milling machine, an appropriately sized dividing head and accessories, produce a part matching the process plan and the print specifications. The part specified will require two groups of holes arrayed on an outer diameter, as well as several surfaces at various angles to one another.
- Machine Tool Power Tapping (Taper Reaming and Pipe Tapping): Set up, drill, and taper ream, and tap a series of holes to print specification.
- Surface Grinding (Finish Flats to +/-.0005): Given a block squared up on a mill, hardened to 55 to 60 Rc, a process plan, a print, hand and precision tools, and choice of a grinding wheels, as well as access to a surface grinder and its accessories, dress the wheel, produce a part matching the process plan and the print specifications using appropriate trade techniques. The part specified will be in the semi-finished state having been squared up. Finishing the part will require precision finishing the six faces of the block to tolerances common to precision grinding for squareness, size, and surface finish characteristics.
- Simple Angles: Given a block roughed out on a mill, a process plan, a print, hand and precision tools, and choice of grinding wheels, as well as access to a surface grinder and its accessories, dress the wheel and grind the specified angled surfaces to a finish matching the process plan and the print specifications. The part specified will be in the semi-finished state having been roughed out. Finishing the part will require precision finishing the specified surfaces of the block to tolerances common to precision grinding for squareness, size, and surface finish characteristics.
- Grinding Wheel: Given a wheel and appropriate equipment, prepare the wheel to go into service. Mount the wheel and produce a surface finish of 32 microinches or better on a cylinder of CRS.
Exam Preparation Resources
There are a number of resources available to help you prepare for the Diemaking Level II examination:
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