Module 1 1.5 Worm Gear Wheel Brass 15-20-25 - 60 Tooth Worm Shaft 45# Steel

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Module 1 1.5 Worm Gear Wheel Brass 15-20-25 - 60 Tooth Worm Shaft 45# Steel

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By HomeDIYer®

Types: 1 Mod - 15 Teeth Worm Gear

Bore: 5 mm

Material & Amount: Brass & 1 PCS

Price:

$11.27 USD

Stock:

In stock (500 units), ready to be shipped

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Module 1 & 1.5 Brass Worm Gear Wheel & 45# Steel Worm Shaft — Precision Drive Components for Robotics and Automation

When your motion-control build demands reliable torque transfer and smooth right-angle drive, mismatched or undersized gears become the weakest link. Engineers, robotics hobbyists, and small-batch manufacturers who need a matched worm gear set — wheel and shaft together — can select every critical dimension in one place with this listing.

This listing covers two material and module combinations: brass worm gear wheels in Module 1 and Module 1.5 (15 to 60 teeth), and 45# carbon steel worm shafts in Module 1 and Module 1.5 (A, B, and C shaft types). Gear wheel bore diameters range from 5 mm to 20 mm (approx. 0.20 in to 0.79 in); worm shaft outer diameters range from 18 mm to 28 mm (approx. 0.71 in to 1.10 in). Keyway options are available on select bore sizes for positive shaft locking.

Typical applications include compact gearbox assemblies for CNC router axes, stepper-motor-driven turntables, robotic arm joints requiring self-locking worm drive, and light industrial conveyor indexing systems where a Module 1 worm gear set or Module 1.5 worm gear set provides the necessary gear ratio and torque multiplication.

⚙️ Compatibility: Module 1 worm wheels pair with Module 1 worm shafts only; Module 1.5 worm wheels pair with Module 1.5 worm shafts only. Verify bore diameter and keyway dimensions match your shaft before ordering.

✅ Key Features of These Brass Worm Gear Wheels and 45# Steel Worm Shafts

🔩Broad Module & Tooth Range — Module 1 wheels from 15 to 60 teeth and Module 1.5 wheels from 20 to 40 teeth let you dial in the exact gear ratio your drive system requires.
🟡Brass Gear Wheel Material — Brass offers low friction against steel worm shafts, natural corrosion resistance, and quiet operation — well suited for indoor automation and instrument drives.
⚙️45# Carbon Steel Worm Shafts — Medium-carbon steel shafts deliver the surface hardness and torsional strength needed to drive brass worm wheels under sustained load without premature wear.
📐Multiple Bore & Keyway Options — Bore sizes from 5 mm to 20 mm, with keyway variants (3×1.4 mm, 4×1.8 mm, 5×2.3 mm, 6×2.8 mm) available on larger bores for positive torque transmission without set-screw slip.
🔄A / B / C Shaft Type Variants — Worm shafts are offered in A-type (plain ends), B-type (one stepped end), and C-type (both stepped ends) to match different housing and coupling configurations.
🛠️DIY and Small-Batch Ready — Sold individually (1 PCS per order) so you can prototype a single axis or order multiples for a production run without minimum-quantity constraints.

📐 Technical Specifications — Worm Gear Wheel & Worm Shaft

Gear Wheel Material	Brass
Worm Shaft Material	45# Carbon Steel
Module (Gear Wheel)	1 / 1.5
Module (Worm Shaft)	1 / 1.5
Number of Teeth (Wheel)	15, 20, 25, 30, 35, 40, 50, 60 (Mod 1); 20, 25, 30, 40 (Mod 1.5)
Gear Wheel Bore Diameter	5 – 20 mm (0.20 – 0.79 in); see variant options
Worm Shaft Outer Diameter	18 mm / 22 mm / 26 mm / 28 mm; see variant options
Keyway Options	3×1.4 mm / 4×1.8 mm / 5×2.3 mm / 6×2.8 mm (bore-dependent)
Shaft Types	A-Type, B-Type, C-Type
Pressure Angle	20°
Drive Type	Right-angle worm drive
Self-Locking	Yes (at standard lead angles for Mod 1 & 1.5)
Quantity per Order	1 PCS
Surface Finish	See variant options

❓ Frequently Asked Questions

How do I choose the right number of teeth for my worm gear wheel?

The number of teeth on the worm wheel determines the gear ratio when paired with a single-start worm shaft. For example, a 40-tooth wheel with a 1-start worm gives a 40:1 ratio. Choose a higher tooth count for greater torque multiplication and lower output speed; choose a lower tooth count (e.g., 15 or 20 teeth) when you need a more compact wheel or a moderate ratio. Confirm the module matches between wheel and shaft before ordering.

Can I use a Module 1 worm shaft with a Module 1.5 worm wheel?

No. Module 1 and Module 1.5 components are not interchangeable. The tooth profile geometry differs between modules, so mixing them will result in incorrect mesh, excessive backlash, and rapid wear. Always match the module number on both the worm wheel and the worm shaft.

What bore size should I select for my motor shaft?

Measure your motor or gearbox output shaft diameter precisely with calipers. Select the bore option that matches — for example, if your shaft is 8 mm, choose the 8 mm bore variant. If you need a positive key drive to prevent rotational slip under load, select a keyway variant (e.g., 8 mm / 3×1.4 mm keyway) and machine a matching keyway into your shaft.

Are these worm gears self-locking?

Yes, at the standard lead angles for Module 1 and Module 1.5 single-start worm drives, the assembly is typically self-locking — meaning the output (worm wheel) cannot back-drive the input (worm shaft) under static load. This makes them suitable for positioning stages, lifts, and actuators where holding position without a brake is required. Self-locking behavior depends on friction conditions; verify with your specific load and lubrication setup.

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

The shaft type refers to the end configuration of the worm shaft. A-Type shafts have plain (unstepped) ends on both sides, suitable for simple bearing housings. B-Type shafts have one stepped end for easier coupling or bearing retention on one side. C-Type shafts have stepped ends on both sides, providing positive axial location in housings that support both ends. Choose the type that matches your housing or coupling design.

What lubrication is recommended for brass worm gear and steel worm shaft assemblies?

A gear oil or grease rated for worm drives (e.g., ISO VG 220 or 320 worm gear oil, or a lithium-complex grease) is recommended. Avoid lubricants containing EP (extreme-pressure) additives with sulfur or phosphorus compounds, as these can corrode brass over time. Apply lubricant to the mesh contact zone and re-lubricate periodically based on duty cycle and operating temperature.

How do I verify the gear fits my application before purchasing?

Check three parameters: (1) Module — must match between wheel and shaft; (2) Bore diameter — must match your shaft OD; (3) Outer diameter of the worm wheel — calculated as (Number of Teeth + 2) × Module in mm. For example, a 40-tooth Mod 1 wheel has an OD of approximately 42 mm. Confirm this fits within your housing clearance before ordering.

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