Medical DeviceQualified Supplier Directory

Kleiss Gears Inc.

390 Industrial Avenue
WI  54840  us
Tel: 715/598-4486
Fax: 715/463-5996

The Precision Polymer Gear Experts

Kleiss Gears specializes in the custom design and manufacture of injection-molded plastic gears with a full range of gearing services including design, tooling, molding, inspection, testing and prototyping. Our customers include major medical OEMs and start-up enterprises at varying points in their product’s life-cycle.

As an ISO 9001 certified manufacturer, we partner with our clients to custom design gears for the unique application with our innovative systems-based approach. We manufacture a total system that works - not just a gear.

All transmissions need the correct balance of torque, efficiency, quietness, weight and wear. Kleiss Gears has 20 years experience creating molded gears to achieve that balance, with the goal of producing the most reliable and cost-effective gears within the required design and life constraints.

Furthering our commitment to the development of successful complete transmissions, we offer our medical device clients the added benefit of supply chain management. We manage established relationships with selected vendors to deliver assembled transmissions for assembly into the final product.

Our research and development partnerships with material manufacturers continue to advance the traditional science of gearing. These R&D efforts produce proven results in the form of precise gears that are stronger, lighter, quieter and more cost effective than traditional gears.

Click to receive a free sample pack demonstrating a range of gear shapes and modern polymer materials.


Services & Capabilities:


  • Shape Optimized Gear Design™
  • Inspection & Analysis
  • Custom testing solutions
  • Reverse engineering
  • Engineering and process development consulting


  • Machined prototypes
  • Injection-molded prototypes
  • Custom processes
  • Proving design, material and more


  • Three-plate construction
  • Replaceable cavities
  • High-temp capable
  • Solutions available for a range of budgets and volumes

Manufacturing Capabilities

  • Micromolding for parts less than 1 cm3
  • Injection-molding parts up to 22 cm (8 inches) in diameter
  • Insert molding and full process automation available
  • CNC controlled presses, automated material handling, real-time process monitoring
  • ISO 9001:2008 certified quality management system

Design Experience:

  • Beveled Gears
  • Compound Gears
  • Crossed Axis Gears
  • Elliptical Gears
  • Face Gears
  • Helical Gears
  • Internal Gears
  • Micro & Miniature Gears
  • Planetary Gears
  • Sector Gears
  • Spur Gears
  • Worm Gears