ISO 9001:2015Ventura, California
Precision
Gear
Design & Manufacturing
Design, setup, manufacture, and inspection of fine and medium pitch gears for aerospace propulsion and actuators, robotics, and medical systems.
Design Setup Manufacture Inspect
Hobbing, Shaping, and Milling
We utilize hobbing, milling, generating, and 3D printing to produce commercial-grade gears for instruments, machine tools, and power transmission, as well as higher-quality gears for advanced applications. From spur and helical to sprocket, ratchet, worm and worm gear, rack, spline and bevel gears.
Inspection
Measurement over Pins (MOP) and Measurement over Wires (MOW) are common methods used to assess gear dimensions. Dual flank testing with devices such as the Vari-Roll provides additional insights into gear accuracy and performance, while span measurement and other similar techniques help evaluate various gear parameters. When these methods are combined with comprehensive dimensional checks using a Coordinate Measuring Machine (CMM), you can achieve a complete and detailed picture of both gear and blank quality. This integrated approach helps ensure that gears meet all required specifications and performance standards.
AGMA and ISO Tolerances
Tolerances can be measured in our MicroGear system and deliver reports. We use NIST calibrated measuring instruments and maintain our membership with AGMA, ensuring access to the latest industry standards and advancements in gear technology.
Quality Shop
We are ISO 9001:2015 certified, demonstrating our commitment to rigorous quality management.
What We Do
Design
Setup
Manufacture
Inspect
Evolvent Design combines advanced engineering capability with a fully equipped gear machine shop — a rare combination. Every gear moves through the same four steps under one roof, for aerospace, robotics, medical, and instrumentation clients who need gears that perform without compromise.
Design
Involute gear design from the specification up: tooth counts, module or diametral pitch, pressure angle, profile shift, and the tolerances that make the pair work. We design to AGMA and ISO standards, and reverse engineer existing gears when the drawing is gone.
- Spur, helical, worm, bevel, rack & spline
- Profile shift & low-tooth-count pinions
- AGMA / ISO tolerancing
- Reverse engineering
Setup
Programming manual machines with change gears can be challenging without a solid understanding of the process and the math
Simplify the process of determining change gears for any machine tool. Our Change Gear Calculator helps you match change gears to achieve a precise machine ratio, transmitting the exact gear ratio between input and output shafts. Standard and reverted gearboxes use 2, 4, 6, or 8 gears for this purpose, and you’ll find common solutions for 4-gear double reduction gearboxes here. Our tools also support a wide range of brands, including Pfauter, Niles, Lorenz, Maag, Jones & Lamson, Barber Coleman, Stanko, Mikron, Fellows, Almhults Bruk AB, Adams, Brown & Sharpe, and more. Simply enter your available change gear assortment and desired ratio into GearCalculators.com to generate a set of change gears that delivers your target ratio.
Manufacture
Hobbing, shaping, milling, generating, and 3D printing for commercial and precision gears in our Ventura, CA shop. Spur, helical, worm, rack, spline, and bevel, from a single prototype to production lots.
- Gear hobbing — fine & medium pitch
- Gear shaping & generating
- 3D printing for rapid prototype
- ISO 9001:2015
Inspect
Every gear is measured before it ships: measurement over pins and wires, span, dual-flank roll testing, and CMM inspection of the blank. Reports to AGMA and ISO tolerances with NIST-calibrated instruments, for our own gears or for parts you send us.
- Measurement over pins & wires
- Dual-flank roll testing
- Zeiss DuraMax CMM
- AGMA / ISO reports
Gear School: the whole loop in one day
From the law of conjugate action to hands-on hobbing, shaping and inspection, in our Ventura, CA shop.
For proper gear lubrication and crossover for older oils this is the place.