Two Piece Heavy Duty Helical Gear Set Mod 1 12T 5mm Bore 45 Degree Left And Right Hand Spiral Gears With M4 M5 Screws For Mechanical Rotation On Round Shaft Staggered Shaft Design Hardened 1045 Steel Black Oxide Finish

Two-Piece Helical Gear Set Mod 1: 12T, 5mm Bore
✔️ Mod 1, 12T, 5 mm bore, 45° LH/RH, M4/M5 screws, hardened steel

This two-piece set includes one left-hand and one right-hand gear with mounting screws. Made from hardened 1045 steel with a black oxide finish, these gears are built for reliable performance in compact drive systems such as precision instruments, machine tools, and automotive or packaging equipment.

✅ Hardened 1045 steel gears with high-temperature quenching and black oxide finish for strength and wear resistance
✅ Bore 5 mm (0.2 in), teeth 12T, outer diameter 18.97 mm (0.75 in), total thickness 20 mm (0.79 in)
✅ Efficiency over 95% with precision engagement reducing friction, vibration, and noise
✅ Includes 2 gears: left-hand and right-hand with M4 and M5 screws
✅ 45-degree left and right hand gears allow parallel (180°) installations in transmissions
✅ Applications include drive systems in EVs, machine tools, printers, packaging, and textiles

💡 What is a helical gear set used for in compact mechanical transmissions? A handy explanation for designers and hobbyists.

- Handy for changing speed and torque in tight spaces
- Offers smooth engagement, reducing vibration and noise through precision design
- Works in 180-degree parallel shaft setups with 45-degree LH/RH gears
- Common in drive systems for EVs, CNC machines, printers, packaging, textiles
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