0.5 Mod Spur Gear 46 Teeth Transmission Gear Bore 6/8/10mm Motor Gears 45# Steel

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0.5 Mod Spur Gear 46 Teeth Transmission Gear Bore 6/8/10mm Motor Gears 45# Steel

Name: 0.5 Mod Spur Gear 46 Teeth Transmission Gear Bore 6/8/10mm Motor Gears 45# Steel
Brand: HomeDIYer
Price: 13.3 USD
Availability: InStock

HomeDIYer

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By HomeDIYer®

Size: 0.5M 46T, Bore 6mm

Packing Quantity: 1 pcs

Price:

$13.30 USD

Stock:

In stock (500 units), ready to be shipped

Quantity:

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0.5 Mod 46-Tooth Spur Gear — Precision Steel Drive Gear for DIY Automation

When your motor drive system demands consistent torque transfer and tight mesh accuracy, a poorly matched gear becomes the weakest link in your build. Makers, robotics hobbyists, and small-workshop engineers who need a reliable 0.5 mod spur gear with a 46-tooth count will find this component ready to drop into compact drive trains without modification.

Each gear is machined from 45# carbon steel, offering a solid balance of hardness and machinability. The module is 0.5 (pitch diameter = 23 mm / ~0.906 in), with 46 teeth and a bore available in 6 mm, 8 mm, or 10 mm to suit common motor shaft diameters. Face width is typically 5–8 mm depending on bore size.

Typical use cases include compact robotic arm joints requiring a 0.5 mod spur gear for precise angular positioning, DIY CNC axis drives where a 46-tooth steel motor gear maintains repeatable step accuracy, and educational automation rigs that need interchangeable 45# steel transmission gears across multiple build iterations.

⚙️ Compatibility: Fits standard 0.5 module gear systems. Bore options (6 / 8 / 10 mm) suit most hobby and light-industrial motor shafts. Verify shaft diameter and keyway requirements before ordering.

✅ Key Features of These 0.5 Mod 46-Tooth Spur Gears

🔩45# Carbon Steel Construction — Machined from 45# medium-carbon steel for reliable hardness, wear resistance, and long service life in continuous-duty drive applications.
📐0.5 Module, 46 Teeth — Standard 0.5 mod pitch ensures direct mesh compatibility with any other 0.5 mod gear in your drivetrain, simplifying gear ratio calculations.
🎯Three Bore Options: 6 / 8 / 10 mm — Select the bore that matches your motor shaft diameter; all three options share the same outer tooth geometry for interchangeable use.
⚖️Compact & Lightweight Profile — With a pitch diameter of ~23 mm, this gear fits into space-constrained enclosures and lightweight robotic frames without adding unnecessary mass.
📦Flexible Pack Quantities (1–10 pcs) — Order exactly what your project needs — single units for prototyping or multi-packs for production runs and spare-parts inventory.
🔄Smooth, Low-Backlash Tooth Profile — Precision-cut involute teeth deliver smooth engagement and consistent torque transmission, reducing vibration in sensitive positioning systems.

📐 Technical Specifications — 0.5 Mod Spur Gear

Module	0.5
Number of Teeth	46 T
Pitch Diameter	23 mm (0.906 in)
Bore Diameter	6 mm / 8 mm / 10 mm (see variant options)
Face Width	See variant options
Material	45# Carbon Steel
Pressure Angle	20°
Tooth Profile	Involute
Finish	See variant options
Packing Quantity	1 / 2 / 3 / 4 / 5 / 8 / 10 pcs (see variant options)
Weight (per piece)	See variant options

❓ Frequently Asked Questions

How do I choose the right bore size — 6 mm, 8 mm, or 10 mm?

Measure your motor or drive shaft diameter with a caliper. Select the bore that matches your shaft exactly. If your shaft uses a keyway or set-screw, confirm the hub depth is sufficient for your fastening method. All three bore options share the same 0.5 mod, 46-tooth outer geometry.

What is the pitch diameter and outer diameter of this gear?

For a 0.5 module, 46-tooth spur gear: Pitch Diameter = Module × Teeth = 0.5 × 46 = 23 mm (≈ 0.906 in). The Outer (Tip) Diameter = (Teeth + 2) × Module = 48 × 0.5 = 24 mm (≈ 0.945 in). Use these values when designing your gear housing or calculating center distance.

Is 45# steel strong enough for my application?

45# carbon steel is a widely used medium-carbon engineering steel with good tensile strength and machinability. It is well-suited for light-to-moderate load drive systems such as robotics, small CNC machines, and educational automation rigs. For heavy-load or high-speed industrial applications, consider whether additional heat treatment or a higher-alloy steel would be required.

Will this gear resist corrosion in humid or outdoor environments?

45# carbon steel has limited inherent corrosion resistance. For humid or outdoor use, apply a light machine oil or grease to the gear teeth and bore, or consider a protective coating. If long-term corrosion resistance is critical, evaluate stainless steel or coated alternatives for your application.

Can I mesh this gear with plastic or aluminum 0.5 mod gears?

Yes — any 0.5 module gear with a 20° pressure angle and involute tooth profile will mesh correctly with this gear, regardless of material. When pairing steel with softer materials (plastic, aluminum), the softer gear will typically wear faster; this is often intentional in designs where the softer gear acts as a sacrificial component.

How do I calculate the gear ratio when pairing this with another gear?

Gear ratio = Driven Teeth ÷ Driver Teeth. If this 46-tooth gear is the driven gear and your motor pinion has, for example, 12 teeth, the ratio is 46 ÷ 12 ≈ 3.83:1 — meaning the output shaft turns at roughly 1/3.83 the motor speed with 3.83× the torque. Adjust your pinion tooth count to achieve your target ratio.

Should I order a single piece or a multi-pack?

For prototyping or a single-axis build, the 1-piece option is the most economical starting point. If you are building multi-axis systems, need spares for ongoing maintenance, or are running a small production batch, the 2–10 pcs packs offer a lower per-unit cost. Select your quantity in the variant options above.

🛒 Select your Size (bore diameter) and Packing Quantity above, then add to cart.