Mod 1 Pinion Spur Gears 10T 12T 14T 45# Steel – 4–7mm Bore

Mod 1 Pinion Spur Gears – 45# Steel, Multiple Tooth & Bore Options

Upgrade your motor transmission setup with these precision-machined Mod 1 Pinion Spur Gears. Available in 10T, 12T, and 14T tooth configurations with bore sizes of 4, 5, 6, 6.35, and 7mm, these gears are engineered for reliable power transfer in motors, robotics, CNC equipment, RC vehicles, and other mechanical applications. Made in Mainland China.

Key Specifications

• Modulus: 1 Mod
• Number of Teeth: 10T, 12T, 14T
• Material: 45# Steel – durable, high-strength carbon steel
• Bore Options: 4mm / 5mm / 6mm / 6.35mm / 7mm
• Surface Treatment: Blackened finish for improved wear resistance and corrosion protection
• Fixing Screws Included: 2× M4 set screws per gear
• Package Includes: 1× Pinion Spur Gear (as selected)

Why Choose These Pinion Gears?

• ✅ High-Strength 45# Steel – Excellent hardness and toughness for demanding transmission tasks
• ✅ Blackened Surface Treatment – Reduces friction and resists corrosion for a longer service life
• ✅ Multiple Configurations – Mix and match tooth count and bore size to suit your exact application
• ✅ Set Screws Included – 2× M4 screws included for secure shaft mounting right out of the box
• ✅ Wide Compatibility – Suitable for motors, gearboxes, robotics, 3D printers, RC vehicles, and more
• ✅ Wholesale Friendly – Available in bulk quantities at competitive pricing; contact us for wholesale rates

Important Notes

• Except for the inner bore accuracy, other dimensions may vary slightly between production batches.
• Please allow minor measurement tolerances due to manual measurement methods.
• Product color may appear slightly different from photos due to monitor calibration differences; please treat the actual item as the standard.

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Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What material are these Mod 1 pinion spur gears made from?

A: These pinion gears are machined from 45# steel (medium-carbon steel), which provides an excellent balance of strength, hardness, and machinability — ideal for motor transmission and mechanical drive applications.

Q: Which bore size should I choose for my motor shaft?

A: Measure your motor shaft diameter accurately before ordering. Available bore sizes are 4mm, 5mm, 6mm, 6.35mm (1/4 inch), and 7mm. Select the bore that matches your shaft diameter for a secure, precise fit.

Q: Are fixing screws included with each gear?

A: Yes! Each gear comes with 2× M4 set screws, so you can mount it securely onto your motor shaft without needing to source additional hardware.

Q: Can I order these pinion gears in bulk or wholesale quantities?

A: Absolutely. We offer wholesale pricing for large quantity orders. Please contact us directly and we will provide a customized quote based on your requirements.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.