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Screw Gears — Precision Metric Screw Gears from KHK USA

ISO 9001:2015 Certified AGMA & JIS Standards Same-Day Shipping 2,600+ Standard Items

KHK USA supplies precision metric screw gears — also called crossed helical gears — for power transmission between non-parallel, non-intersecting shafts. Screw gears are widely used in instrument drives, fine adjustment mechanisms, and low-power transmission applications.

Screw Gear Configuration

KHK screw gears have a 45-degree helix angle and are designed to mesh in crossed-axis configurations at 90 degrees. Both gears in a screw gear set can have the same or different tooth counts depending on the required ratio.

Applications

Screw gears are ideal for fine-pitch applications in measuring instruments, optical equipment, and low-load mechanisms where crossed-axis shaft arrangements are required.

Free Engineering Tools

4 Free AI-Powered Engineering Tools

Built exclusively by KHK USA. Not available from any other gear supplier. Click any tool to use it.

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
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FAQ

Frequently Asked Questions

KHK screw gears are designed to operate at 90-degree crossed-axis shaft angles. Both gears have a 45-degree helix angle which allows meshing between non-parallel, non-intersecting shafts.

Screw gears have lower load capacity than spur or helical gears due to point contact between teeth. They are best suited for light-load, fine-pitch applications in instruments and precision mechanisms.

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