Job Description

Job Overview

We are seeking a patient, skilled, and detail-oriented Manual Precision OD Grinder to set up and operate a specialized 2-axis manual cylindrical grinding machine (Shigiya GP-45B). In this role, you will perform fine finish grinding on high-precision piston rods to achieve mirror-like surface finishes (2–4 microinches Ra) and tight dimensional tolerances.

This position uses a Trizact diamond-embedded abrasive belt system backed by a grinding wheel. Experience grinding with belt systems or thermal-spray coatings is NOT required—we will train anyone with strong traditional manual OD grinding experience on a grinding wheel who demonstrates solid technical judgment and adaptability.

Key Responsibilities

• Machine Operation & Setup: Set up and operate a manual Shigiya GP-45B cylindrical grinder using hard stops, two-axis manual controls, and table-angle adjustments to remove taper and achieve precise outer diameters.

• Precision Finishing: Perform finish grinding on 4140 base steel piston rods coated with chrome-carbide plasma or other thermal-spray coatings (hardnesses ranging from 62–70 HRC).

• In-Process Quality Control: Perform rigorous self-inspections throughout long cycle times (2–4 hours). Constantly monitor dimensions, adjust feed/traverse parameters, and re-verify size using pressure micrometers and profilometers.

• Blueprint Reading & GD&T: Interpret inch blueprints and engineering drawings with GD&T callouts, focusing heavily on tight runout (down to .0003”) and concentricity requirements.

• Secondary Operations (Cross-Training): Learn and occasionally operate 2-axis manual engine lathes (Lodge & Clausing with DROs) and a conventional WMW dressable-wheel grinder as production demands shift.

• Material Handling & Maintenance: Utilize a 1/2-ton overhead crane to load/unload parts (24”–80” length, 1.75”–6” diameter) weighing over 30 lbs. Perform routine maintenance, including replacing abrasive belts when worn.

• Quality Escalation: Document paper discrepancy records and collaborate with Manufacturing Engineers on any non-conforming material issues.

Qualifications & Requirements

• Grinding Experience: Proven experience operating manual OD cylindrical grinders with traditional grinding wheels.

• Precision Tolerances: Ability to consistently achieve ultra-fine surface finishes (2–4 microinches Ra), tight diameter tolerances (±.0005”), and strict runout limits (.0001”–.0003”).

• Measurement Skills: Proficiency with precision measurement equipment, specifically pressure micrometers and profilometers.

• Adaptability & Mindset: Strong problem-solving skills, patience, and a high degree of attention to detail to learn the specific nuances of an older, well-maintained manual machine.

• Physical Capability: Ability to safely load parts using overhead cranes or manually maneuver smaller components under 30 lbs.

Preferred Qualifications

• Experience grinding parts with thermal-spray or plasma-coated surfaces.

• Prior experience operating manual engine lathes with DROs.

• Experience adjusting table angle setups to resolve taper issues during live operations.

You should be proficient in:

• Equipment Troubleshooting
• Troubleshooting Skills
• Mechanical Troubleshooting Skills
• OSHA 10-Hour Certification (OSHA 10)
• Heavy Material Handling
• Deburring Experience
• Precision Measurement & Hand Metrology
• Precision Measurement & Inspection
• Machine Setups for Production Runs
• Shop Math Skills
• Blueprint Reading
• Adjacent Skill Mapping: Understanding "bridge roles" (e.g., recognizing that an engine lathe machini
• Engineering Standards & GD&T: Metrology equipment (profilometers, pressure micrometers, optical comp
• In-Process Quality & Tolerances Checklist: Specific qualifying questions on tolerance thresholds (e.
• Machinery & Tooling Lexicon: Specific equipment models, tooling systems, controller types, and machi
• Materials & Processes Metallurgy: Material grades (e.g., 4140, 316 stainless, titanium), surface tre

Machines & technologies you'll use:

• Manual Grinder
• Cylindrical Grinder Machine
• OD/ID Grinding Machine