Custom Flame Machined Large Gears & Sprockets

Cogmatic is a leading manufacturer of large custom gears and sprockets up to 18′ in diameter, holding tolerances to .005”. We also fabricate flame hardened custom gears and sprockets for drums up to 18′ in diameter for extreme environment applications.

Flame Machining Advantages

  • Quicker and more cost-efficient than conventional machining/hobbing
  • Consistent, accurate results with complete system control and documentation
  • Ideal for big parts for large drums, conveyors and crawler applications
  • Alternative to tooling up with castings or forgings for new designs
  • Good choice for unique, large parts seldom replaced
  • Wide range of tooth designs possible

Large Sprockets

  • Used in large drums to process semi-solid aggregate type products
  • Used for crawlers and conveyors
  • Used in large heavy engineered chain applications
  • Efficient choice for standard roller chain upper sizes from RC80-RC240 at 6′-18′ diameter

Cogmatic flame machining, combined with our other sophisticated capabilities like spin-induction hardening up to 60” diameter with complete computer control and documentation, is your best choice for 1 or 100 custom parts.

Cogmatic Flame Machining

High quality, repeatable tooth profiling

Turnkey, Customized Solutions

Turn Key Solutions and Blanket Orders for Large Sprockets, Gears, and more.

Improving Delivery

Many of our longtime OEM customers come to us for repeat orders and…

Controlled QMS Delivers

Cogmatic has been building quality products for over 70 years.

An Earned Reputation

Before Cogmatic, OEMs were forced to choose between expensive cold-machine…

Repeat Customer Testimonials

Learn about the Cogmatic difference today

Choosing Cogmatic

The difference between Flame Cutting and Cogmatic Flame Machining is like night…