Mod 1 Worm Gear Wheel Brass 35 Tooth Worm Shaft 45# Steel Precision Bore 6-15 mm

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Mod 1 Worm Gear Wheel Brass 35 Tooth Worm Shaft 45# Steel Precision Bore 6-15 mm

Name: Mod 1 Worm Gear Wheel Brass 35 Tooth Worm Shaft 45# Steel Precision Bore 6-15 mm
Brand: HomeDIYer
Price: 44.46 USD
Availability: InStock

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By HomeDIYer®

Types: 1 Mod - 35 Teeth Worm Gear

Bore: 8 mm

Material & Amount: Brass & 1 PCS

Price:

$44.46 USD

Stock:

In stock (500 units), ready to be shipped

Quantity:

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Mod 1 Worm Gear & Worm Shaft Set — Precision Drive Components for Robotics and Automation

When your project demands a compact, self-locking drive solution with a high reduction ratio, finding a matched worm gear and worm shaft set with consistent bore tolerances can be a real challenge. This listing is designed for engineers, robotics builders, and DIY automation enthusiasts who need reliable, spec-driven mechanical components without the guesswork.

This set includes a Mod 1 (Module 1) 35-tooth worm gear wheel machined from brass, paired with a Mod 1 worm shaft (A-type or B-type) machined from 45# carbon steel. Bore diameters range from 6 mm to 17 mm (approximately 0.24 in to 0.67 in), with optional keyway configurations for positive shaft engagement. Gear wheel outer diameter is typically 37 mm (~1.46 in); worm shaft outer diameter ranges from 18 mm to 28 mm (~0.71 in to 1.10 in) depending on variant.

Typical use cases include low-speed high-torque rotary actuators for robotic joints, worm drive lifts and linear stages in DIY CNC or 3D printer Z-axis assemblies, and self-locking gate or valve actuators in industrial automation prototypes. The Mod 1 pitch makes these components compatible with standard Mod 1 worm drive systems used in small-batch manufacturing and maker projects.

⚙️ Compatibility: Mod 1 (Module 1) worm gear standard. Worm gear and worm shaft are designed as a matched pair. Select matching Types, Bore, and Material & Amount from the variant options above.

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

🔩 35-Tooth Brass Worm Gear Wheel — Mod 1 pitch, 35 teeth, machined from brass for smooth meshing, corrosion resistance, and reduced noise in worm drive applications.

🔧 45# Carbon Steel Worm Shaft (A-Type & B-Type) — Hardened 45# steel worm rod with single-start thread; A-type and B-type variants differ in shaft shoulder and flange geometry to suit different housing configurations.

📐 Precision Bore Options 6–17 mm — Multiple bore diameters available (6, 8, 10, 12, 14, 15, 16, 17 mm) with optional keyway slots (3×1.4 mm, 4×1.8 mm, 5×2.3 mm) for positive shaft locking without set screws.

🔁 Self-Locking Drive Geometry — Mod 1 single-start worm provides inherent back-drive resistance, making this set suitable for holding loads without a brake in low-speed actuator applications.

📦 Flexible Quantity Options — Available in 1, 2, 3, 5, or 10 piece sets per variant, allowing single-unit prototyping or small-batch production runs without minimum order constraints.

🏭 Matched Mod 1 Pair System — Gear wheel and worm shaft are manufactured to the same Mod 1 standard, ensuring correct center distance and tooth engagement when used together in a properly designed housing.

📐 Technical Specifications — Mod 1 Worm Gear and Worm Shaft

Module (Mod)	1
Gear Type	Worm Gear Wheel + Worm Shaft (matched pair)
Number of Teeth (Gear Wheel)	35
Worm Starts	1 (single-start)
Gear Wheel Material	Brass
Worm Shaft Material	45# Carbon Steel
Gear Wheel Outer Diameter	Typically 37 mm (~1.46 in)
Worm Shaft Outer Diameter	18 mm – 28 mm (~0.71 in – 1.10 in), see variant options
Bore Diameter Range	6 mm – 17 mm (0.24 in – 0.67 in)
Keyway Options	Plain bore, 3×1.4 mm, 4×1.8 mm, 5×2.3 mm — see variant options
Worm Shaft Type	A-Type (shoulder flange) / B-Type (extended shaft) — see variant options
Gear Wheel Thickness	18 mm – 20 mm (~0.71 in – 0.79 in), see variant options
Quantity per Order	1, 2, 3, 5, or 10 PCS — see variant options
Applicable Standard	Mod 1 (ISO metric module)
Typical Application	Robotics, automation, DIY CNC, actuators, worm drive assemblies

❓ Frequently Asked Questions

How do I select the correct bore size for my shaft?

Measure your drive shaft diameter with calipers. Select the bore option that matches your shaft diameter exactly. If your shaft uses a key for torque transmission, choose the corresponding keyway variant (e.g., 10 mm / 4×1.8 mm keyway). For plain shafts secured with a set screw, choose the plain bore option.

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

A-Type worm shafts feature a shoulder flange on one end, which is used to locate the shaft axially within a housing bore. B-Type worm shafts have an extended plain shaft on both ends, providing more flexibility for custom housing designs. Choose based on your housing geometry and how you plan to retain the shaft axially.

Are the worm gear and worm shaft sold as a matched set?

Yes. Both components are manufactured to the Mod 1 standard and are designed to mesh correctly when used together. The worm shaft (single-start, Mod 1) drives the 35-tooth worm gear wheel. You must select both a gear wheel variant and a worm shaft variant to build a complete drive pair — they are listed under the same product with separate Type options.

Will this worm gear set be self-locking under load?

A single-start Mod 1 worm drive typically exhibits self-locking behavior, meaning the worm shaft can drive the gear wheel but the gear wheel cannot back-drive the worm shaft under static load. This makes it suitable for holding positions in actuators and lifts without a separate brake. However, self-locking is not guaranteed under dynamic vibration or shock loads — always verify with your specific load and speed conditions.

What materials are used and how do they resist corrosion?

The worm gear wheel is machined from brass, which offers good corrosion resistance in indoor and light-duty environments and reduces galling against the steel worm shaft. The worm shaft is machined from 45# carbon steel, which provides strength and wear resistance but is not inherently corrosion-resistant. For humid or outdoor environments, consider applying a light machine oil or grease to both components.

What center distance should I use when designing my housing?

For a Mod 1 worm drive, the theoretical center distance between the worm shaft axis and the gear wheel axis is calculated as: Center Distance = (Worm Pitch Diameter + Gear Wheel Pitch Diameter) / 2. For a 35-tooth Mod 1 gear wheel, the pitch diameter is 35 mm. The worm pitch diameter depends on the number of starts and the worm outer diameter — for a single-start Mod 1 worm, this is typically 18–28 mm depending on the variant selected. Consult your specific variant dimensions and allow for standard backlash clearance in your housing design.

Can I use these components in a 3D printer Z-axis or CNC application?

Yes. The self-locking characteristic of a single-start Mod 1 worm drive makes it well-suited for Z-axis lead screw alternatives in 3D printers and small CNC machines, where holding position without power is desirable. Ensure your housing provides adequate support for both the worm shaft and gear wheel, and lubricate the mesh point with a suitable gear grease for extended service life.

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