0.5M 36T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel
0.5M 36T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel
0.5M 36T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel
0.5M 36T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel
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0.5M 36T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel0.5M 36T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel0.5M 36T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel0.5M 36T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel

0.5M 36T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel

HomeDIYer
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By HomeDIYer®

Price:
$4.15 USD
Stock:
In stock (500 units), ready to be shipped

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Description

0.5M 36T Steel Spur Gears — Reliable Pinion Transmission for DIY Motion Projects

When your robot arm skips a beat or your RC drivetrain loses torque, the culprit is often a worn or undersized gear. Makers, hobbyists, and small-shop engineers who need consistent, repeatable motion control rely on properly spec'd spur gears — and these 0.5 Module 36-tooth steel pinion gears are built to deliver exactly that.

Each gear is machined from 45# carbon steel, offering a solid balance of hardness and machinability. The module is 0.5M with 36 teeth, available in 6 mm (0.24 in) or 8 mm (0.31 in) bore diameters. Outer diameter is typically around 19 mm (0.75 in), with a face width in the range of 5–10 mm (0.20–0.39 in) depending on the specific variant.

These spur gears are well-suited for DIY robotics and servo-driven arms, RC car and truck transmission systems, and compact CNC or 3D-printer extruder drives — anywhere a 0.5M pitch gear train is required for smooth, low-backlash power transfer.

⚙️ Compatibility: Designed for 0.5 Module (0.5M) gear systems. Pairs with any 0.5M mating gear, rack, or pinion. Bore sizes available: 6 mm and 8 mm. Verify shaft diameter before ordering.

✅ Key Features of These 0.5M 36T Steel Spur Gears

🔩
45# Carbon Steel Construction

Machined from 45# carbon steel for a reliable combination of surface hardness and core toughness — resists wear under continuous rotational load.

📐
0.5 Module, 36 Teeth

Standard 0.5M pitch ensures direct interchangeability with any 0.5M gear system. 36T count delivers a useful reduction or speed ratio in compact drivetrains.

🎯
Dual Bore Options: 6 mm & 8 mm

Choose the bore that matches your motor or shaft diameter. Both options maintain the same tooth geometry and module for consistent meshing.

📦
Flexible Quantity Packs (1–50 pcs)

Order a single gear for prototyping or up to 50 pieces for production runs and bulk builds — quantity pricing scales accordingly.

🔄
Low-Backlash Spur Profile

Straight-cut spur tooth profile provides smooth, predictable engagement with minimal backlash — ideal for position-sensitive applications like robotics and CNC.

🛠️
Machinable for Custom Keyways

45# steel is readily machinable, allowing you to add a keyway, set-screw flat, or custom bore modification in a standard workshop lathe or mill.

📐 Technical Specifications — 0.5M Spur Gears

Module 0.5M
Number of Teeth 36T
Bore Diameter 6 mm (0.24 in) or 8 mm (0.31 in) — See variant options
Outer Diameter (OD) Typically ~19 mm (0.75 in)
Face Width Typically 5–10 mm (0.20–0.39 in)
Pressure Angle 20°
Material 45# Carbon Steel
Finish See variant options
Gear Type Spur (straight-cut)
Available Quantities 1, 3, 5, 10, 15, 20, 30, 40, 50 pcs

❓ Frequently Asked Questions

What does "0.5M" mean and how do I know if it matches my existing gear?

"0.5M" refers to the gear module — a standardized measure of tooth size equal to the pitch diameter divided by the number of teeth. Two gears must share the same module to mesh correctly. If your existing gear is labeled 0.5M or has a pitch diameter of approximately 18 mm for 36 teeth, these gears are compatible.

Which bore size should I choose — 6 mm or 8 mm?

Measure your motor shaft or drive shaft diameter with a caliper. Choose 6 mm if your shaft is 6 mm in diameter, or 8 mm for an 8 mm shaft. If you need a different bore size, the 45# steel construction allows machining to a custom diameter in a lathe.

How strong are these gears under load?

45# carbon steel offers a tensile strength typically in the range of 600–800 MPa after standard heat treatment. For light-to-medium duty applications such as robotics, RC vehicles, and small CNC machines, these gears provide adequate load capacity. For heavy industrial loads, consider a hardened steel or alloy steel gear.

Are these gears corrosion-resistant?

45# carbon steel has moderate corrosion resistance. For indoor or dry environments, the bare steel finish is generally sufficient. If used in humid or outdoor conditions, apply a light machine oil or consider a zinc-plated or stainless alternative to prevent surface rust.

Can I use these gears with a 0.5M rack for linear motion?

Yes. A 0.5M spur gear meshes directly with a 0.5M gear rack, making this a suitable pinion gear for rack-and-pinion linear motion systems. Ensure the rack's pressure angle also matches (standard 20°) for smooth engagement.

Why buy in bulk — what are the advantages of ordering 10, 20, or 50 pieces?

Bulk packs offer a lower per-unit cost, which is useful for production builds, classroom kits, or keeping spares on hand for ongoing projects. The per-piece price decreases significantly as quantity increases — compare the 1-piece and 50-piece options to see the savings.

What applications are these 36T spur gears best suited for?

These gears are well-matched for DIY robotics (servo and motor gearboxes), RC car and truck drivetrains, 3D printer extruder drives, small CNC axis drives, and educational STEM projects requiring a standard 0.5M gear train. They are not recommended for high-speed turbine or heavy industrial applications.

🛒 Select your Teeth - Bore(mm) and Qty(pcs) above, then add to cart.

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