Module 1M Flat Gear Motor Transmission Spur Gear 12T to 150T Cylindrical gears

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Module 1M Flat Gear Motor Transmission Spur Gear 12T to 150T Cylindrical gears

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By HomeDIYer®

Model: 1M 12T

Packing Quantity(pcs): 1

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$8.13 USD

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In stock (500 units), ready to be shipped

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Module 1M Cylindrical Spur Gear — Precision Transmission for Motors and DIY Drive Systems

When a mismatched gear ratio stalls your motor project or strips teeth under load, the root cause is almost always an imprecise or incompatible gear. Engineers, robotics builders, and hands-on makers who need reliable, repeatable power transmission rely on standardized module spur gears to eliminate that guesswork. These Module 1M flat spur gears are machined to metric module 1 (1M) standards, giving you a consistent pitch that meshes cleanly with any other 1M-compatible gear in your drivetrain.

Each gear in this series is a cylindrical spur gear with straight teeth cut parallel to the gear axis. The module 1M pitch means a tooth pitch of approximately 3.14 mm (0.124 in). Tooth counts span from 12T to 150T, covering outer diameters from roughly 14 mm (0.55 in) for the 12T up to approximately 152 mm (5.98 in) for the 150T. Face width is typically 10–15 mm (0.39–0.59 in) depending on tooth count. Material is typically engineering-grade plastic (POM/acetal) or metal alloy — see variant options for material confirmation.

Typical use cases include small DC motor gearboxes for robotics and automation, 3D printer extruder and axis drive assemblies requiring a specific gear ratio, and custom RC vehicle or conveyor reduction stages where a precise 1M module spur gear set is needed for low-backlash power transfer.

⚙️ Compatibility: Meshes with all Module 1M (1 mod) spur, rack, and pinion components. Bore diameter varies by tooth count — confirm bore size against your shaft before ordering.

✅ Key Features of These Module 1M Spur Gears

📐 Standardized 1M Module Pitch

Metric module 1 tooth profile ensures direct interchangeability with any other 1M gear, rack, or pinion — no custom matching required.

🔢 Wide Tooth Count Range: 12T to 150T

A single product line covers gear ratios from compact 12-tooth pinions to large 150-tooth wheels, letting you dial in the exact reduction or speed-up your application needs.

⚡ Straight Cylindrical Tooth Form

Parallel straight teeth deliver smooth, low-vibration meshing at moderate speeds — ideal for motor output stages, conveyor drives, and precision positioning systems.

🔩 Consistent Bore and Hub Geometry

Each gear is machined with a centered bore sized to common shaft diameters. Bore dimensions scale with tooth count — see variant options for exact bore specs.

📦 Single or 5-Pack Quantity Options

Order one gear for prototyping or a 5-piece pack for production builds and spares — both options available for every tooth count in the range.

🏭 Broad Application Compatibility

Suited for DC gearbox motors, stepper-driven axes, robotics joints, RC drivetrains, and any custom mechanism requiring a standardized 1M spur gear transmission.

📐 Technical Specifications — Module 1M Cylindrical Spur Gear

Module	1M (Metric Module 1)
Tooth Count Range	12T – 150T (select variant)
Tooth Profile	Straight cylindrical (spur)
Pressure Angle	20° (standard)
Outer Diameter	(Tooth count + 2) × 1 mm — e.g., 14 mm for 12T, 152 mm for 150T
Pitch Circle Diameter	Tooth count × 1 mm
Face Width	Typically 10–15 mm (varies by tooth count)
Bore Diameter	See variant options
Material	See variant options
Packing Quantity	1 pc or 5 pcs (select variant)
Compatible Module	1M (meshes with 1M racks, pinions, and gears)

❓ Frequently Asked Questions

How do I choose the right tooth count for my gear ratio?

Divide the driven gear tooth count by the driving gear tooth count to get your reduction ratio. For example, pairing a 12T pinion with a 60T gear gives a 5:1 reduction — your output shaft turns at 1/5 the motor speed with 5× the torque. Select the two tooth counts that produce your target ratio from the available 12T–150T range.

Will these gears mesh with my existing 1M module rack or pinion?

Yes. All gears in this series follow the metric module 1 standard with a 20° pressure angle, which is the most common 1M specification. They will mesh directly with any other 1M-compatible spur gear, rack, or pinion that also uses a 20° pressure angle.

What is the bore diameter, and can I modify it to fit my shaft?

Bore diameter varies by tooth count — please check the variant listing or contact us to confirm the bore size for your specific tooth count before ordering. The bore can typically be enlarged by a machinist if needed, but reducing it is not possible without replacing the gear.

How strong are these gears under load?

Load capacity depends on the material variant selected. POM (acetal/Delrin) gears handle light-to-medium loads quietly and with low friction, making them suitable for robotics and 3D printer drives. Metal alloy variants carry significantly higher torque and are suited for more demanding motor transmission applications. Refer to the variant description for material-specific load ratings.

Are these gears corrosion-resistant?

POM plastic variants are inherently corrosion-resistant and perform well in humid or mildly wet environments. Metal variants may require lubrication and periodic maintenance in corrosive conditions. For outdoor or high-moisture applications, the plastic variant is generally the more durable choice without additional treatment.

What is the difference between buying 1 pc vs. the 5-pack?

The single-piece (1 pc) option is ideal for prototyping, replacement, or single-axis builds. The 5-pack offers a lower per-unit cost and is recommended for production runs, multi-axis machines, or keeping spares on hand. Both options are available for every tooth count in the 12T–150T range.

Can I use these gears in a 3D printer extruder or axis drive?

Yes. Module 1M spur gears are widely used in 3D printer extruder gear sets and lead-screw reduction stages. Select the tooth count combination that matches your target extrusion or axis gear ratio, and confirm the bore diameter fits your motor shaft before ordering.

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