2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear
2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear
2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear
2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear
2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear
2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear
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2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear

2 Mod 10T-110T Spur Gear 45# Steel Thickness 20mm Motor Pinion Transmission Gear

HomeDIYer
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By HomeDIYer®

Price:
$4.58 USD
Stock:
In stock (500 units), ready to be shipped

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Description

2 Mod Spur Gear in 45# Steel — Reliable Pinion Transmission for DIY Automation

When your automation project demands a gear that meshes cleanly, holds tight tolerances, and survives continuous duty cycles, a poorly sourced spur gear becomes the weakest link in the drivetrain. Makers, robotics builders, and small-workshop engineers who need a dependable 2 mod spur gear for motor pinion or transmission applications will find this range covers the full spectrum from compact 10-tooth pinions to large 110-tooth output gears.

Each gear is machined from 45# medium-carbon steel — a material known for its balance of hardness and machinability — with a uniform face width of 20mm (approximately 0.79 in). The module 2 tooth profile follows standard involute geometry, with an outer diameter ranging from approximately 24mm (0.94 in) for the 10T variant up to approximately 224mm (8.82 in) for the 110T variant, and a pitch diameter calculated as module × tooth count (e.g., 20mm pitch diameter for 10T, 220mm for 110T).

Typical use cases include DIY CNC router axis drives where a 2 mod rack-and-pinion setup requires a matching spur pinion, small conveyor or indexing table transmissions where a 2 mod spur gear pair provides a fixed gear ratio, and educational robotics platforms or maker projects that need a standardized metric module gear for multi-stage gearbox assemblies.

⚙️ Compatibility: Designed for Module 2 (Mod 2) gear systems. Meshes with any standard Mod 2 spur gear, rack, or pinion. Bore diameter varies by tooth count — confirm bore size from variant details before ordering.

✅ Key Features of These 2 Mod Spur Gears

🔩 45# Steel Construction

Machined from 45# medium-carbon steel for a strong combination of wear resistance and toughness suited to continuous transmission loads.

📐 Standard Module 2 Involute Profile

Follows the standard involute tooth form for Module 2, ensuring accurate mesh with any compatible Mod 2 counterpart gear or rack.

📏 20mm Uniform Face Width

A consistent 20mm (0.79 in) face width across all tooth counts provides stable load distribution and simplifies shaft alignment in multi-gear assemblies.

🔢 Wide Tooth Count Range: 10T to 110T

77 variants spanning 10 to 110 teeth let you dial in the exact gear ratio you need — from high-speed pinion drives to slow, high-torque output stages.

🎯 Precision-Machined Bore

Each gear features a machined center bore sized to the tooth count. Confirm the bore diameter from the variant listing to match your shaft specification.

🔄 Versatile Transmission Applications

Suitable as a motor pinion, intermediate idler, or output gear in CNC drives, conveyor systems, robotics gearboxes, and DIY automation projects.

📐 Technical Specifications — 2 Mod Spur Gear

Module 2 (Mod 2)
Tooth Count Range 10T – 110T (see variant options)
Face Width (Thickness) 20mm (0.79 in)
Pitch Diameter Module × Teeth (e.g., 20mm for 10T; 220mm for 110T)
Outer Diameter Pitch Diameter + 2 × Module (see variant options)
Pressure Angle 20°
Tooth Profile Standard involute
Material 45# medium-carbon steel
Bore Diameter See variant options
Keyway See variant options
Surface Finish See variant options
Gear Type Spur gear (external)
Application Motor pinion, transmission, CNC drive, robotics

❓ Frequently Asked Questions

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

The gear ratio between two meshing spur gears equals the ratio of their tooth counts. For example, pairing a 20T pinion with a 40T output gear gives a 2:1 reduction. Identify your required speed reduction or torque multiplication, then select tooth counts whose ratio matches. For motor pinion applications, a smaller tooth count (10T–20T) on the motor shaft paired with a larger output gear is typical.

What does "Module 2" mean and will this gear mesh with my existing gears?

Module (Mod) is the metric standard for gear tooth size, defined as pitch diameter divided by tooth count. All gears in a meshing pair must share the same module. These gears are Module 2, so they will mesh correctly with any other standard Mod 2 spur gear, rack, or pinion — regardless of tooth count — as long as the pressure angle also matches (20° standard).

Is 45# steel strong enough for my load, and is it corrosion-resistant?

45# medium-carbon steel offers good tensile strength (typically 600–800 MPa depending on heat treatment) and is well-suited for moderate-to-heavy transmission loads in dry or lightly lubricated environments. It is not inherently corrosion-resistant; for humid or outdoor environments, apply a light machine oil or consider a surface coating. For highly corrosive environments, contact us to discuss material alternatives.

What bore diameter does each variant have?

Bore diameter varies by tooth count and is listed in the individual variant details. Please check the variant description or contact us with your tooth count selection before ordering to confirm the bore size matches your shaft diameter. Custom bore machining may be available — reach out to discuss your requirements.

Can I use these gears in a CNC router rack-and-pinion drive?

Yes. These Module 2 spur gears are commonly used as pinions in rack-and-pinion CNC axis drives. Select a tooth count that gives your desired linear travel per motor revolution (linear travel = π × module × teeth per revolution of the pinion). Pair with a standard Mod 2 rack for a direct-fit assembly.

Do these gears come with a keyway or set-screw hole?

Keyway and set-screw availability depends on the specific tooth count variant. Please refer to the variant listing details or contact us before ordering if a keyway or set-screw is required for your shaft retention method.

How do I calculate the center distance between two meshing Mod 2 gears?

Center distance = (Teeth on Gear 1 + Teeth on Gear 2) × Module / 2. For example, a 20T and 40T Mod 2 pair: (20 + 40) × 2 / 2 = 60mm center distance. This formula applies to standard external spur gear pairs with no profile shift.

🛒 Select your tooth count (Model) above, then add to cart.

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