Precision Screw Gears (Crossed Helical Gears) – Metric | Steel, Brass & Plastic
GUNRI manufactures metric screw gears (crossed helical gears) for transmitting motion between non-parallel, non-intersecting shafts typically at 90 degrees. Module 1 to 4. Materials: steel, stainless steel, aluminum bronze, POM, nylon. Different material pairs recommended.
Description
What Are Screw Gears?
Screw gears, also known as crossed helical gears, are helical gears used to transmit motion between shafts that are neither parallel nor intersecting, typically arranged at a 90-degree angle. The two mating gears have the same lead direction but different helix angles. Unlike worm gears which have a line contact, screw gears have point contact, making them suitable primarily for light to moderate load transmission.
Design Considerations
Material Pairing: Due to sliding friction at the tooth contact point, screw gears are prone to wear. We recommend pairing different materials (e.g., steel gear mating with bronze or plastic gear) to reduce galling and extend service life.
Hardened Gears: Case-hardened or through-hardened steel screw gears offer significantly better wear resistance than unhardened gears in continuous operation.
Specifications
Modules: 1, 1.5, 2, 2.5, 3, 4
Materials: Carbon steel (S45C), stainless steel (SUS304), aluminum bronze (CAC702/C6190), POM (acetal), nylon (MC901)
Hardness (Steel): Case-hardened HRC 55-62 or as specified
Pressure Angle: 20 degrees
Helix Angle: Customizable per application requirements
Applications
Office Automation Equipment • Printers & Copiers • Light-Duty Conveyors • Instrumentation • Small Robotics • Camera & Optical Systems • Textile Machinery • Packaging Equipment
Why Choose GUNRI for Screw Gears?
• Precision hobbing for metric module screw gears
• Mixed-material pairing expertise for optimal wear life
• Custom helix angles and center distances
• Engineering support for light-duty power transmission design
• Cost-effective solutions for OEM applications
