EVOLVENT DESIGN
Design & Manufacture of Gears and Transmissions
ISO 9001:2015 Certified
Evolvent enters the DARPA Lift Challenge → Follow our progress
Countdown to Registration
Gear Milling, Hobbing, Shaping, 3D Printing
Gear milling, hobbing, generating and shaping.
Manual and CNC equipment to deliver gearboxes, shafts, couplers and complete mechanisms.
Gear Inspection
Measurement over Pins for spur, helical and rack gears.
AGMA tolerances using Vari-Roll and inspection software
Gear Manufacturing & Inspection
Milling, Hobbing and other processes
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. Our involute gear types include Spur, Helical, Worm, Wormwheel, Ratchet, Sprocket, and Splines.
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 Quality Standards
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 hold an ISO 9001:2015 certificate, demonstrating our commitment to rigorous quality management.
GearCalculators is LIVE! Click the button above or links below to get started. Design-Draw-Setup-Inspect.
Save Projects, Import your Hobs and Gears
Gear School
Design and Manufacture in Your Shop
Gear Expertise
At Evolvent Design, we practice the art of gearmaking. Our unique combination of advanced design skills and a fully equipped gear machine shop is rarely found together. If you're looking to accelerate your gear knowledge, this is the place to start. Gears present a steeper learning curven than most mechanisms-get there faster with our guidance.
Calculators
We've shared our in-house tools to help you design, inspect, and make your own gears. From our gear calculators to 3D gear generators these tools will make gear production easier and more understandable. Change Gear Calculator and other indexing machine setup tools and services.
Short Courses
Gears for Makers, a comprehensive one-day course to cover the history, math, and techniques. The course is located in our Ventura California shop where we will split our time between design, calculating and measuring, and half our time to machining hobbing or shaping gears.
We've supported a diverse range of clients: college SAE Baja teams, startups, mature companies, those fixing supply chain issues, and anyone curious about motion. We also offer reverse engineer for legacy parts to keep old equipment running.
Change Gears
for
Machine Tools
Change Gears for Machine Tools
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.
For proper gear lubrication and crossover for older oils this is the place.
Evolvent Design Enters the DARPA Lift Challenge
We’re assembling a fast, focused engineering team to compete in the DARPA Lift Challenge, aiming to develop one of the lightest, most innovative heavy-lift aircraft ever attempted.
The grand prize is $2.5M for a 4:1 lift aircraft that completes the course, with an additional $500k Innovation Prize awarded to DARPA’s top pick for breakthrough design.
With our aerospace-grade machine shop, proven engineering talent, and a team of more than 14 specialists, we are uniquely positioned to attempt this challenge — and push the boundaries of lightweight structures, propulsion efficiency, and rapid-development flight systems.
This project will accelerate internal innovation, strengthen our aerospace capabilities, and give our employees and interns a rare, career-defining opportunity to work on a large-scale DARPA challenge.
Follow our progress and see how Evolvent is shaping the future of American aerospace innovation.