Sinker EDM Specialist

AJ Tool LLC; Village of Richfield (WI); On-site; USD 65,000 - 90,000; Full time

Job summary

AJ Tool LLC in Richfield, WI is seeking a Sinker EDM Specialist to operate and maintain sinker EDM equipment for high-precision mold components. This role requires deep EDM process knowledge, electrode design, and fine-tolerance machining.

The position involves collaborating with toolmakers, CNC programmers, and engineers to optimize EDM strategies, with responsibilities spanning setup, blueprint interpretation, electrode fabrication, monitoring, inspection, and documentation.

Qualifications

• 5+ years in sinker EDM operations, mold making or precision machining.
• Associate degree from a two-year college or technical school.
• Technical diploma or certification in mold making, machining, or EDM technology preferred.

Responsibilities

• Set up and operate sinker EDM machines to exact specifications.
• Interpret blueprints, CAD models, and work instructions to determine machining requirements.
• Design and fabricate electrodes using graphite or copper materials.
• Monitor EDM operations and adjust for accuracy and surface finish.
• Inspect finished parts with precision measuring tools to ensure tolerances.
• Perform routine maintenance and troubleshoot EDM equipment.
• Collaborate with toolmakers, CNC programmers, and engineers to optimize EDM strategies.
• Maintain accurate records of setups, tooling, and job progress.

Skills

5+ years of experience

Attention to detail

Team collaboration

Education

Associate degree in machining or related field

Tools

Sodick EDM

Makino EDM

Mitsubishi EDM

Graphite electrodes

Copper electrodes

Job description

Description

MISSION & CORE VALUES:

We strive to provide our business partners the mold design and build experience they expect and deserve. When our partners are successful, we are successful.

JOB PROFILE SUMMARY:

The Sinker EDM Specialist is responsible for operating and maintaining sinker EDM (Electrical Discharge Machining) equipment to produce high-precision mold components. This role requires a deep understanding of EDM processes, electrode design, and fine-tolerance machining. The Sinker EDM Specialist plays a critical role in supporting the production of complex injection molds with tight dimensional and surface finish requirements.

ESSENTIAL JOB DUTIES:

The individual in this position must be able to successfully perform the job duties listed below.

Responsibilities:

• Set up and operate sinker EDM machines to produce mold components to exact specifications.
• Interpret blueprints, CAD models, and work instructions to determine machining requirements.
• Design and fabricate electrodes using graphite or copper materials.
• Monitor EDM operations and make adjustments to maintain accuracy and surface finish.
• Inspect finished parts using precision measuring tools and ensure conformance to tolerances.
• Perform routine maintenance and troubleshooting of EDM equipment.
• Collaborate with toolmakers, CNC programmers, and engineers to optimize EDM strategies.
• Maintain accurate records of setups, tooling, and job progress.

Requirements

QUALIFICATIONS:

Work Experience:

• 5+ or more years of related experience

Related Experience:

Experience in sinker EDM operations, mold making, or precision machining.

Education:

• Associate degree from a two-year college or technical school

Preferred educational background:

Technical diploma or certification in mold making, machining, or EDM technology.

Certifications/Tech expertise:

• Proficiency in sinker EDM machine operation (e.g., Sodick, Makino, Mitsubishi)
• Knowledge of electrode materials and design
• Familiarity with precision measuring tools and inspection techniques
• Understanding of mold design and steel types

PREFERRED QUALIFICATIONS:

• Experience with Makino Sinkers a Plus
• Strong attention to detail and craftsmanship
• Ability to work independently and as part of a team
• Experience with automated EDM cells and integrated metrology
• Good communication and documentation skills

PHYSICAL DEMANDS:

• Frequent standing, bending, and lifting (up to 50 lbs.)
• Use of hand tools, measuring instruments, and PPE
• Exposure to manufacturing environment conditions