Fine and Medium Pitch Precision Gears and Components

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Koro Industries is a custom manufacturer of fine and medium pitch gears and other components. Open gearing is our specialty. Visit our products pages for examples of our work and information about our capabilities. We produce many types of gears including:  armature shafts, bevel gears, cluster gears, differentials, face gears, gear segments, helical gears, hub gears, involute splines, metric gears, miter gears, precision gears, rack and pinion gears, ratchets, ring gears, sector gears, shafts, straight side splines, spur gears, ratchets, and worm and wheel gears. Types of other non-gear components that we produce include:  detents, instrumentation knobs and pointers, lockplates, pallets, pins, posts, shafts and stops.

Industries Served

Since 1965, Koro Industries has manufactured gears and components for a variety of industries including: aviation, defense and aerospace instrumentation, commercial, energy, general industry and equipment, healthcare, leisure, musical instrument, power tool, scientific research and transportation. Visit our Industries Served page for more information about our work in these exciting fields!

Photo Credit: NASA


In addition to our manufacturing expertise and conscientious attention to quality, Koro Industries works to build strong customer relationships. Follow the “Learn More” link for information about our customer service, hob sharpening service and other manufacturing capabilities.


As a second generation family business, Koro Industries appreciates its founders. Learn more about them and the basis for our manufacturing philosophy. This section includes company history, quality policy, certifications, policy documents and our equipment list. Meet the Koro team!

What our customers say.

Koro Industries recently received the highest possible ratings in all indexes from one of their long-time aviation customers.  With a delivery index of 100%, a quality index of 100% and an overall quality index of 100%, Koro Industries is considered an "Outstanding" supplier by this leading aviation instrumentation manufacturer. Ratings provided by the "Supplier Quarterly Performance Rating" report for the period 01/02/2019 thru 03/29/2019.
Performance Rating from the Director of Quality Leading Aviation Instrumentation Manufacturer
"Steve will work with me on small jobs or big ones. He is willing to spend the time to get it right. With Koro, you know you're not going to leave dissatisfied. If the problem can be solved, they will solve it. Everyone there is very conscientious about quality. Another positive is Koro's 50 plus years of experience. Steve has been there since the beginning, he knows everything about gear cutting. We are all trying to help our customers and sometimes, they don't know where to go with a particular problem. It's nice to have Koro to turn to, to run the jobs I don't run in my plant. They also sharpen hobs, which is very convenient for me."
Mike Pallow
"Koro Industries shows an attention to detail and quality above other vendors.  When others have tried and failed to produce intricate parts for us, Koro has shone for us many times by manufacturing top quality parts and delivering on time.  Communication throughout the ordering and manufacturing process is excellent.  Koro has become more than just another vendor, they've become a key partner in the success of our business."
Angela Meier
“We value you [Koro] as a supplier and look forward to continued business. Your ability to meet delivery dates with top quality parts is unparalleled. Thank you for all you do.”
Logistics Management and Quality Assurance Departments Miniature Drive Systems Manufacturer
Koro Industries received a delivery index of 100%, a quality index of 100% and an overall quality index of 100%. A value >99% is considered to be a rating of “Outstanding” by our customer. Deliveries for this customer are scheduled via a Kanban fulfillment system from which Koro receives daily triggers. This information is taken from the Supplier Quarterly Performance Rating for the period 01/04/2016 thru 03/31/2016.
Performance Rating from the Director of Quality Leading Aviation Instrumentation Manufacturer
“Koro far exceeds competitors. There have been a number of times when we have chosen another vendor to receive a better price and they have failed with quality. We have come to Koro with minute urgent orders and they have come through offering the quality we need in the time frame they promised.” Koro Industries has saved us […] from a number of binds and we are thankful to have them as a vendor…” and, “Keep up the great work!”
General Industry Customer