Spur Gears 1M Transmission Gear With Step Stainless Steel Motor Gear 32~50 Teeth

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Spur Gears 1M Transmission Gear With Step Stainless Steel Motor Gear 32~50 Teeth

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By HomeDIYer®

Size: 1M 32T/Bore 8mm

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$23.75 USD

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In stock (500 units), ready to be shipped

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1M Stainless Steel Spur Gears — Precision Transmission for DIY Automation Builds

When a slipping or mismatched gear brings your automation project to a halt, you need a replacement you can trust to fit right the first time. These 1M module stainless steel spur gears are engineered for makers, hobbyists, and small-workshop builders who demand dimensional accuracy and corrosion resistance without overengineering their budget.

Each gear is machined from stainless steel with a module of 1M and is available in tooth counts from 32T to 50T. Bore options range from 8 mm (0.31 in) up to 20 mm (0.79 in), with plain-bore and keyway variants (3×1.4 mm, 4×1.8 mm, 5×2.3 mm, and 6×2.8 mm keyways) to suit a wide range of shaft diameters. The stepped hub design provides additional axial support for secure shaft engagement.

These 1M spur gears are well-suited for DIY CNC router drives, small conveyor belt systems, 3D printer extruder geartrains, and educational robotics platforms where a reliable, low-backlash gear mesh is essential.

⚙️ Compatibility: Designed for 1M (module 1) gear systems. Meshes with any 1M-compatible rack, pinion, or mating spur gear. Verify bore diameter and keyway dimensions against your shaft before ordering.

✅ Key Features of These 1M Stainless Steel Spur Gears

🔩 Stainless Steel Construction

Machined from stainless steel for corrosion resistance and long service life in both dry and lightly humid environments.

📐 Wide Tooth Count Range (32T–50T)

Choose from 32 to 50 teeth to dial in your exact gear ratio for speed reduction or torque multiplication in your drivetrain.

🎯 Multiple Bore & Keyway Options

Plain bores from 8–20 mm and keyway variants (3×1.4, 4×1.8, 5×2.3, 6×2.8 mm) ensure a secure, non-slip fit on your motor or drive shaft.

🏗️ Stepped Hub Design

The integrated step hub adds axial rigidity, reducing wobble and maintaining consistent tooth mesh under load.

⚡ 1M Module Precision

Standard 1M module profile ensures accurate tooth geometry for smooth, low-noise meshing with any compatible 1M rack or pinion.

🔧 Drop-In Replacement Ready

Standardized dimensions make these gears straightforward replacements for worn or broken 1M spur gears in existing assemblies.

📐 Technical Specifications — 1M Spur Gear

Module	1M
Tooth Count	32T – 50T (see variant options)
Material	Stainless Steel
Bore Diameter	8 mm – 20 mm (see variant options)
Keyway Options	None (plain bore) / 3×1.4 mm / 4×1.8 mm / 5×2.3 mm / 6×2.8 mm
Hub Style	Stepped hub
Pressure Angle	20°
Pitch Diameter	See variant options
Surface Finish	Machined (natural stainless)
Weight	See variant options

❓ Frequently Asked Questions

How do I choose the right tooth count for my application?

The tooth count determines your gear ratio. Divide the driven gear teeth by the driving gear teeth to get the ratio. For example, pairing a 32T drive gear with a 48T driven gear gives a 1.5:1 reduction, increasing torque by 50% while reducing speed by the same factor. Match your tooth count to the ratio your project requires.

What bore size should I select?

Measure your motor or drive shaft diameter with calipers. Select the bore that matches your shaft exactly — plain bores are available from 8 mm to 20 mm. If your shaft uses a keyway for positive drive, choose the variant that lists the matching keyway dimensions (e.g., 12/4×1.8 mm means a 12 mm bore with a 4×1.8 mm keyway slot).

Are these gears compatible with other 1M gears and racks?

Yes. These gears follow the standard 1M (module 1) tooth profile with a 20° pressure angle, so they mesh correctly with any other 1M-compatible spur gear, rack, or pinion regardless of brand, as long as the module and pressure angle match.

How strong are stainless steel spur gears compared to other materials?

Stainless steel offers significantly higher tensile strength and fatigue resistance than nylon or acetal (Delrin) gears, and comparable strength to mild steel with the added benefit of corrosion resistance. For light-to-medium duty DIY automation loads, stainless steel is a reliable choice that outlasts plastic alternatives in most environments.

Will these gears rust or corrode?

Stainless steel provides good corrosion resistance in dry and lightly humid indoor environments. For outdoor or wet applications, periodic lubrication with a compatible gear grease is recommended to extend service life and maintain smooth operation.

What is the difference between a plain bore and a keyway bore variant?

A plain bore relies on a set screw or press fit to secure the gear to the shaft. A keyway bore includes a machined slot that accepts a matching key inserted between the shaft and gear hub, providing a positive mechanical lock that prevents rotational slipping under higher torque loads. If your shaft has a keyway cut, always choose the matching keyway variant.

Can I use these gears in a 3D printer or CNC router?

Yes. These 1M stainless steel spur gears are well-suited for extruder geartrains, Z-axis drives, and other low-to-medium speed CNC or 3D printer applications where dimensional accuracy and durability matter. Verify the bore size matches your motor shaft before ordering.

🛒 Select your tooth count and bore size above, then add to cart.