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Custom Gears Engineering Hub

Your complete resource for metric gear selection, engineering validation, and technical specification. Explore 611 pages of expert gear content plus 4 free AI-powered engineering tools — built exclusively by KHK USA.
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Product, industry, material & capability guides
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Engineering calculators & validators
Years
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Of world-class metric gear manufacturing
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Factory direct to anywhere in the USA
Product Catalog

Metric Gear Types from KHK USA

Factory-direct precision metric gears in 10 product families — 2,600+ standard configurations in stock and ready to ship.

Most Popular
Spur Gears
The most common gear type — straight teeth parallel to the axis. Available in modules 0.5 to 10, steel, stainless, and plastic.
400+Configurations
Low Noise
Helical Gears
Angled teeth for smoother, quieter operation. Ideal for high-speed, high-load applications in automation and robotics.
200+Configurations
Right Angle
Bevel Gears
Transmit motion between intersecting shafts. Available in straight and spiral tooth forms for right-angle drives.
150+Configurations
90° Drive
Miter Gears
Equal tooth bevel gears — transmit motion at exactly 90° between intersecting shafts at 1:1 ratio.
60+Configurations
High Ratio
Worm Gears
High reduction ratios in a compact package. Self-locking capability makes them ideal for lifting and positioning.
100+Configurations
Linear Motion
Gear Racks & Pinions
Convert rotational to linear motion. Spur and helical variants for CNC machines, automation, and gantry systems.
180+Configurations

Showing 6 gear families — 10 product types in stock

View All 10 Gear Types
Free Engineering Tools

4 Free AI-Powered Engineering Tools

Built exclusively by KHK USA. Not available from any other gear supplier. Embedded on every page in this hub.

01
Compatibility
Gear Assembly Compatibility Checker
Validate that your gear set will mesh correctly before ordering. Get an instant engineering verdict with actionable recommendations.
  • Module & pressure angle match validation
  • Hunting tooth analysis
  • Center distance calculation
  • COMPATIBLE / WARNING / INCOMPATIBLE verdict
Use This Tool
02
Conversion
Module-to-DP Converter & Cross-Reference
Bi-directional conversion between metric Module and imperial Diametral Pitch with KHK standard module matches.
  • Instant bi-directional conversion
  • Closest KHK module matches with deviation %
  • Side-by-side dimensional comparison
  • 12 most common DP quick-reference grid
Use This Tool
03
Reference
Interactive Gear Glossary
Searchable reference of 40 gear engineering terms with definitions, formulas, and direct KHK product links.
  • Real-time keyword search with highlighting
  • 6 category filters — Geometry, Performance, etc.
  • Alphabetical navigation A–Z
  • Direct links to KHK products
Use This Tool
04
Calculator
Gear Torque & Load Calculator
Full Lewis bending stress analysis for gear tooth strength validation with animated safety factor verdict.
  • 9 KHK material options
  • Barth velocity factor equation
  • 8 result cards in metric + imperial
  • Automatic upgrade path recommendations
Use This Tool
Industries Served

Metric Gears for Every Industry

KHK USA supplies precision metric gears to engineers across every major industry — from robotics and semiconductor to food processing and aerospace.

KHK USA is a ITAR Compliant component manufacturer industries leader.
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KHK USA is a ISO 9001:2015 pinion manufacturer industries leader.
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KHK USA is a marine rack manufacturer industries leader.
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KHK USA is a agricultural rack & pinion fabricator industries leader.
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KHK USA is a machine tool rack & pinion manufacturer industries leader.
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KHK USA is a construction gearbox fabricator industries leader.
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KHK USA is a slicing gearbox fabricator industries leader.
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KHK USA is a robotics rack & pinion manufacturer industries leader.
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Showing 8 industries — KHK USA serves 350+ applications

View All Industries
Gear Materials

Metric Gear Materials

KHK USA offers metric gears in a wide range of materials — from carbon steel to plastic — to match every application requirement.

MOST POPULAR
Steel Gears
The most widely used material for metric gears. KHK USA stocks thousands of steel gear configurations for immediate shipment — ideal for high-load, general-purpose power transmission applications.
High StrengthExcellent MachinabilityHeat TreatableCost EffectiveWide Selection
CORROSION RESISTANT
Stainless Steel
Ideal for food processing, medical, and marine applications where corrosion resistance is critical. KHK USA offers stainless steel gears in multiple grades for demanding environments.
Corrosion ResistantHygienicFood SafeHigh DurabilityMarine Grade
LIGHTWEIGHT
Plastic Gears
Plastic metric gears are ideal for light-duty, low-noise applications. They operate without lubrication and are resistant to corrosion — perfect for food processing, medical, and consumer equipment.
LightweightSelf-LubricatingCorrosion ResistantLow NoiseNo Rust
Specialty Grade
Non-Ferrous
Non-ferrous gear materials include aluminum, brass, and bronze alloys. These materials are chosen for their excellent corrosion resistance, conductivity properties, and suitability for precision applications.
Non-MagneticCorrosion ResistantGood ConductivityPrecision Grade
Vibration Damping
Cast Iron
Cast iron gears offer excellent vibration damping and self-lubricating properties. Commonly used in slow-speed, high-load applications where noise reduction is important.
Vibration DampingSelf-LubricatingHigh Compressive StrengthLow Cost
HIGH PERFORMANCE
Alloy Steel
Alloy steel gears deliver superior strength, toughness, and fatigue resistance for demanding power transmission. Used extensively in robotics, aerospace, and heavy equipment applications.
Superior StrengthFatigue ResistantShock ResistantHigh Performance

Showing 6 materials — KHK USA offers 10 gear material types

View All Materials
Manufacturing Capabilities

What KHK USA Can Do for You

From precision ground gears to custom modifications — KHK USA delivers factory-direct metric gears with full engineering support.

Custom Orders
Custom & Made-to-Order Gears
Non-stock configurations, special bores, keyways, set screws. Engineering support from quote to final delivery.
500+Custom Configurations
JIS Grade 3-5
Ground & Precision Gears
JIS Grade 3–5 precision ground gears for aerospace, semiconductor, and high-accuracy servo applications.
Learn More
Secondary Operations
Bore modifications, gear finishing, hub alterations, and keyway cutting at KHK's Mineola, NY facility.
Learn More
Engineering Support
Application engineers available to help you select the right gear, calculate loads, and specify tolerances for your design.
87+Years of Expertise
Certified
ISO 9001:2015 & ITAR Certified
Fully certified for defense and government contracts. Quality management system compliant to ISO 9001:2015 standards.
Learn More
3-Day Delivery
Factory Direct Manufacturing
All KHK stock gears ship factory direct from Japan to anywhere in the USA within 3 business days.
3Day USA Delivery

Showing 6 capability categories — we specialize in 203 precision gear capabilities

View All 203 Capabilities
Gear Education

Gear World — Technical Resources

From first-principles to advanced engineering guides.

01
Fundamentals
What is Gear Module?
Understand the metric module system, how it compares to Diametral Pitch, and how to specify the right module for your application.
5 min readRead Article
02
Calculation
How to Calculate Gear Ratio
Step-by-step gear ratio calculation for spur, helical, and compound gear trains with…
6 min read
03
Reference
Gear Terminology Glossary
43 essential gear engineering terms defined with formulas and links to relevant…
8 min read
04
Engineering
Gear Backlash Guide
Understand gear backlash — how to set it, measure it, acceptable margins,…
7 min read
05
Formulas
Gear Formulas & Calculators
Complete reference of gear geometry formulas: Lewis bending stress, contact stress, and…
10 min read
06
Conversion
DP to Module Conversion
Convert between Diametral Pitch and metric Module — full cross-reference table and…
4 min read
07
Selection
Gear Selection Guide
How to choose the right gear type, material, module, and precision class…
9 min read
08
Maintenance
Gear Lubrication
Lubrication types, selection, application methods, and maintenance intervals for metric gear systems.
6 min read
09
Engineering
Gear Noise Reduction
Identify the causes of gear noise and vibration, and learn proven techniques…
7 min read

Showing 9 articles from KHK USA Gear Education Library

View All Articles
Comparisons & Decisions

How KHK Compares

Independent comparisons, buying guides, and decision frameworks to help you choose the right metric gear partner.

Comparison
KHK USA vs QTC Gears
A detailed comparison of product range, lead times, pricing, material options, and engineering support between KHK USA and QTC.
Comparison
KHK USA vs SDP/SI
How KHK's metric gear catalog compares to SDP/SI in terms of module range, precision grades, and delivery capabilities.
Guide
Best Metric Gear Supplier in the USA
What to look for in a metric gear supplier — and why engineers across North America choose KHK USA.
KHK Recommended
Education
Metric vs Imperial Gears
Module vs Diametral Pitch — the complete technical comparison with conversion formulas, compatibility notes, and application guidance.
Decision
Stock vs Custom Gears
When to use KHK stock gears vs requesting a custom order — cost, lead time, and performance trade-offs explained.
About KHK
Why Choose KHK USA
87+ years of manufacturing expertise. ISO 9001:2015 certified. Factory direct from Japan in 3 business days. The metric gear authority.
KHK Advantage

Showing 6 comparisons — including guides, decisions & KHK vs competitors

View All Comparisons
KHK USA — Metric Gear Authority

Ready to Specify Your Gears?

Talk to a KHK USA application engineer — or request a custom gear quote online in minutes.

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ISO 9001:2015 ITAR Certified 3-Day USA Delivery 87+ Years