Gear Grinding & Polishing Services
High-Volume CNC Gear Finishing for Ultra-Low NVH Automotive & EV Applications
High-Precision Automotive Gear Grinding & Superfinishing
Modern high-performance transmissions and electric vehicle (EV) reduction gearboxes demand tolerances measured in microns and micro-inch surface finishes. Standard gear hobbing or shaping operations are often insufficient to meet the acoustic, thermal, and durability requirements of next-generation powertrains. Systrand’s automated CNC gear grinding and polishing services bridge this gap with unmatched consistency at production scale.
We operate advanced generating gear grinding and profile grinding machines equipped with continuous dressing systems. Our holistic manufacturing methodology controls every variable prior to grinding—including specialized low-distortion heat treatment processes—to minimize stock removal variations, eliminate grinding burn, and deliver exceptional pitch line velocity and load distribution.
By offering fine grinding and polish grinding options, Systrand achieves mirror-like flank finishes that dramatically reduce friction coefficient, mitigate micro-pitting, lower operating temperatures, and maximize overall drive-unit power density.
Engineering & Finishing Capabilities
Built for Tier 1 OEMs requiring extreme quality standards, our gear grinding lines handle spur, helical, internal, and external gear geometries with strict adherence to DIN/ISO gear quality specs.
Surface Finishing & Roughness
- Polish Grinding: Surface roughness down to Ra < 0.1 µm (4 µin)
- Elimination of machining feed marks and peak asperities
- Significant increase in effective contact ratio (Rmr)
- Reduced gear tooth wear and enhanced scuffing resistance
Precision Micro-Geometry
- Controlled profile relief, tip relief, and crown modifications
- Lead correction to compensate for shaft deflection under load
- DIN 3962 Quality Class 3–5 production capabilities
- Integrated closed-loop CMM gear inspection feedback
Production & Scalability
- High-speed automated robotic cell loading
- Ideal for high-rpm EV e-Axles and multi-speed ICE transmissions
- In-line washing, automated demagnetization, and visual checking
- Zero-defect tracking via advanced statistical process control (SPC)
Optimizing Gear Geometry for Low NVH Performance
In electric vehicles, where internal combustion engine noise is absent, gear whine and transmission hum become prominent customer complaints. Gear designers set tight nominal geometries, but real-world manufacturing variations—such as microscopic tooth surface ripple—can generate high-frequency acoustics known as "ghost order" noise.
As an early North American pioneer in hybrid and electric vehicle (HEV/EV) gear manufacturing, Systrand has produced millions of whisper-quiet components currently in service. Our facility utilizes 100% end-of-line noise signature analysis on critical gear sets. This testing identifies minute harmonic deviations that traditional dimensional measuring machines miss.
Through iterative design assistance and controlled grinding wheel dressing techniques, we neutralize undesirable frequency spikes, delivering high-efficiency transmission gears that perform flawlessly under extreme torque loads.
Integrated Process Control: From Heat Treat to Final Polish
A precision gear is only as good as the process chain behind it. Systrand manages the total manufacturing flow: incoming alloy steel verification, precise blank machining, custom heat treatment development to minimize distortion, grinding, super-polishing, and full acoustic validation. This end-to-end oversight ensures complete traceability, reduced lead times, and predictable performance.
Quality Assurance & Industry Certifications
Our zero-defect culture is reinforced by internationally recognized automotive certifications and continuous Lean Six Sigma methodologies.
IATF 16949:2016 Certified
Ford Q1 Preferred Quality Status
ISO 14001:2015 Certified
21st & 22nd Ford World Excellence Awards
"Ford's annual World Excellence Awards recognize our top-performing suppliers for their contributions to our success. Congratulations to Systrand for being a recipient of this coveted award. Thank you for all that you do in support of Ford Motor Company."
Partner with an Established Tier 1 Gear Manufacturer
Whether you require prototype development, noise signature troubleshooting for EV powertrains, or high-volume gear grinding production, Systrand’s engineering team is ready to review your drawing specifications.
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