Mod 1 Worm Gear Wheel Brass 40 Tooth Worm Shaft 45# Steel-Brass Bore 6 - 15 mm

Roll over image to zoom in Click on image to zoom

Mod 1 Worm Gear Wheel Brass 40 Tooth Worm Shaft 45# Steel-Brass Bore 6 - 15 mm

HomeDIYer

No reviews

By HomeDIYer®

Types: 1 Mod - 40 Teeth Worm Gear

Bore: 8 mm

Material & Amount: Brass & 1 PCS

Price:

$85.75 USD

Stock:

In stock (500 units), ready to be shipped

Quantity:

Share this product

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

DIY Expert Support

Get fitment advice & recommendations

Mon–Fri 8:30 AM – 8:00 PM

WhatsApp Email Us

24-Hour Fast Ship

Arrives in 3–14 Days

Worldwide Shipping

30-Day Returns

1 tree planted with every purchase

Mod 1 Worm Gear & Worm Shaft Set — Reliable Torque Reduction for Robotics and Automation

When your project demands precise, high-ratio torque reduction in a compact footprint, mismatched or undersized gearing becomes a costly bottleneck. Engineers, robotics builders, and DIY automation enthusiasts need a matched worm gear set they can trust to mesh accurately and hold up under continuous load. This Mod 1 worm gear and worm shaft combination is engineered for exactly that — delivering smooth, self-locking power transmission in a space-efficient package.

This listing covers a complete Mod 1 worm drive set consisting of a 40-tooth worm gear wheel and a matching worm rod (shaft). The worm gear wheel is available in brass, while the worm shaft is offered in either 45# carbon steel or brass. Bore diameters range from 6 mm to 20 mm (approximately 0.24 in to 0.79 in), with plain bore and keyway options (4×1.4 mm, 4×1.8 mm, and 5×2.3 mm keyways) to suit various shaft configurations. Worm rod outer diameters span Ø18 mm, Ø22 mm, Ø26 mm, and Ø28 mm (approx. 0.71–1.10 in).

Typical applications include low-speed, high-torque actuator drives for robotic arms and CNC rotary tables, self-locking lift and positioning mechanisms in DIY automation rigs, and compact gear reduction stages for conveyor systems and small-batch manufacturing equipment.

⚙️ Compatibility: Designed for Mod 1 (Module 1) worm drive systems. Worm gear and worm shaft must be ordered as a matched pair. Verify bore diameter and keyway dimensions against your shaft before ordering.

✅ Key Features of These Mod 1 Worm Gear & Worm Shaft Components

🔩

40-Tooth Brass Worm Gear Wheel

The worm gear wheel features 40 teeth at Module 1 pitch, machined from brass for smooth meshing, corrosion resistance, and reduced noise during operation.

🔧

A-Type & B-Type Worm Rods in 45# Steel or Brass

Choose between A-Type (single-start, standard thread) and B-Type worm rods. Available in 45# carbon steel for strength or brass for corrosion resistance in lighter-duty applications.

📐

Wide Bore Range with Keyway Options

Bore diameters from 6 mm to 20 mm accommodate a broad range of shaft sizes. Multiple keyway profiles (4×1.4 mm, 4×1.8 mm, 5×2.3 mm) ensure secure torque transmission without slippage.

🔄

Self-Locking Worm Drive Geometry

The Mod 1 single-start worm geometry provides inherent self-locking behavior, preventing back-driving under load — ideal for positioning and lifting applications.

🏭

Suitable for Robotics, Automation & DIY Builds

Compact form factor and standard Mod 1 dimensions make these components drop-in compatible with most Mod 1 worm gearbox housings and custom fabricated drive assemblies.

📦

Flexible Quantity Options

Available in 1, 2, 3, or 5-piece quantities per variant, allowing you to stock exactly what your project or production run requires without over-ordering.

📐 Technical Specifications — Mod 1 Worm Gear & Worm Shaft

Module (Mod)	1
Worm Gear Teeth	40 Teeth
Worm Gear Material	Brass
Worm Shaft Material	45# Carbon Steel or Brass (see variant options)
Worm Rod Type	A-Type or B-Type (see variant options)
Bore Diameter (Gear)	8 mm – 20 mm (approx. 0.31 – 0.79 in) — see variant options
Bore Diameter (Shaft)	6 mm – 15 mm (approx. 0.24 – 0.59 in) — see variant options
Worm Rod Outer Diameter	Ø18 mm / Ø22 mm / Ø26 mm / Ø28 mm — see variant options
Keyway Options	Plain bore, 4×1.4 mm, 4×1.8 mm, 5×2.3 mm — see variant options
Quantity per Order	1 / 2 / 3 / 5 PCS — see variant options
Gear Ratio	40:1 (single-start worm)
Drive Type	Worm & Worm Gear (self-locking)
Surface Finish	See variant options

❓ Frequently Asked Questions

How do I choose the correct bore diameter for my shaft?

Measure your shaft diameter precisely with calipers. Select the bore option that matches your shaft size. If your shaft requires a keyway for positive torque locking, choose the corresponding keyway variant (e.g., 12 mm/4×1.8 mm keyway). Plain bore variants rely on set screws or press fit.

What is the difference between A-Type and B-Type worm rods?

A-Type worm rods have the thread starting from one end of the shaft, while B-Type rods have the thread positioned centrally or offset, affecting how the shaft seats in a gearbox housing. Check your gearbox housing design to confirm which type fits your bearing and housing layout.

Can I use a brass worm shaft with a brass worm gear?

Technically yes, but it is generally not recommended for continuous-duty applications. Pairing two brass components increases wear on both parts. For best longevity, pair a brass worm gear with a 45# steel worm shaft, which is the conventional and more durable combination.

Is this worm gear set truly self-locking?

Yes. A single-start Mod 1 worm drive with a 40-tooth gear produces a 40:1 ratio, which provides inherent self-locking under most static load conditions. However, self-locking behavior depends on the lead angle, friction coefficient, and applied load — it should not be relied upon as a safety brake in life-critical applications without additional mechanical stops.

What gearbox housings are compatible with these Mod 1 components?

These components are dimensionally compatible with standard Mod 1 worm gearbox housings. Verify the center distance, shaft bore, and bearing seat dimensions of your housing against the worm rod outer diameter (Ø18 mm, Ø22 mm, Ø26 mm, or Ø28 mm) before assembly. Custom fabricated housings should be designed to these outer diameter specifications.

How many pieces do I need for a complete worm drive assembly?

A complete worm drive requires one worm gear wheel and one worm shaft (rod). Select the quantity option that matches your project needs — 1 PCS is suitable for a single assembly, while 2, 3, or 5 PCS options offer better per-unit value for small production runs or spare stock.

What is the corrosion resistance of brass vs. 45# steel worm components?

Brass offers good natural corrosion resistance and is suitable for mildly humid or indoor environments. 45# carbon steel provides higher tensile strength but requires protection (such as grease or a sealed housing) in humid or outdoor environments to prevent surface oxidation. For corrosive environments, brass components or additional surface treatment are recommended.

🛒 Select your Type, Bore, and Material & Amount above, then add to cart.