Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel
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Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# SteelSpur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel

Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel

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By HomeDIYer®

Price:
$22.21 USD
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In stock (500 units), ready to be shipped

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Description

1.5 Mod Spur Pinion Gear with Step — Reliable Transmission for DIY Drives & Automation

When a motion-control project demands a compact, precisely cut spur pinion gear that fits a stepped shaft without slipping, choosing the wrong module or bore size wastes hours of rework. Makers, robotics builders, and small-machine designers who need a 1.5 mod spur pinion gear with a stepped hub will find this range covers the most common shaft and tooth-count combinations in a single listing.

Each gear is machined from 45# carbon steel — a medium-carbon structural steel known for its balance of hardness and machinability. The stepped hub design integrates a larger-diameter collar (step diameter 25–45 mm / ~0.98–1.77 in) behind the gear face, providing a positive axial stop and extra bearing surface. Bore diameters span 6–25 mm (~0.24–0.98 in), and tooth counts run from 30 T to 45 T at a 1.5 module pitch.

Typical use cases include DIY CNC axis drives where a 1.5 mod pinion gear meshes with a rack or larger wheel, small conveyor and indexing systems requiring a stepped-bore spur gear for positive shaft location, and robotics joint drives where a 30–45 tooth spur gear delivers the right speed-reduction ratio without excessive bulk.

⚙️ Compatibility: Meshes with any 1.5 module (Mod 1.5) spur gear or rack. Confirm bore diameter and step diameter match your shaft and housing before ordering.

✅ Key Features of These 1.5 Mod Spur Pinion Gears with Step

🔩 45# Carbon Steel Construction

Machined from 45# carbon steel for a solid combination of wear resistance and machinability, suitable for moderate-load transmission applications.

📐 1.5 Module Pitch

Standard Mod 1.5 tooth profile ensures direct mesh compatibility with any 1.5 module spur gear, rack, or pinion in your drivetrain.

🎯 Stepped Hub for Positive Shaft Location

The integrated step collar (25–45 mm diameter) acts as a built-in axial stop, reducing the need for additional retaining hardware on the shaft.

🔄 Wide Tooth Count Selection: 30 T – 45 T

Four tooth counts (30 T, 35 T, 40 T, 45 T) let you dial in the gear ratio you need without sourcing from multiple suppliers.

📏 Multiple Bore Diameters: 6–25 mm

Nine bore options from 6 mm to 25 mm cover the most common motor and gearbox output shaft sizes used in DIY and light-industrial builds.

📦 Flexible Pack Quantities

Available in 1, 2, 3, or 5-piece packs so you can stock spares or equip a multi-axis machine in a single order.

📐 Technical Specifications — 1.5 Mod Spur Pinion Gear

Module 1.5 Mod
Number of Teeth 30 T / 35 T / 40 T / 45 T (see variant options)
Bore Diameter 6 / 8 / 10 / 12 / 15 / 16 / 17 / 20 / 25 mm (see variant options)
Step Diameter 25 / 35 / 40 / 45 mm (see variant options)
Material 45# Carbon Steel
Pressure Angle 20° (standard)
Gear Type Spur Gear (straight tooth)
Hub Style Stepped hub with integrated collar
Finish See variant options
Pack Quantity 1 / 2 / 3 / 5 pcs (see variant options)
Compatible Pitch Mod 1.5 spur gears and racks

❓ Frequently Asked Questions

How do I choose the right tooth count for my application?

The tooth count determines your gear ratio. Divide the driven gear's tooth count by this pinion's tooth count to get the reduction ratio. For example, pairing a 30 T pinion with a 90 T wheel gives a 3:1 reduction. Higher tooth counts on the pinion reduce the ratio and increase output speed; lower tooth counts increase torque multiplication.

Which bore diameter should I select for my motor shaft?

Measure your motor or gearbox output shaft diameter with a caliper and select the matching bore. Available bores are 6, 8, 10, 12, 15, 16, 17, 20, and 25 mm. If your shaft uses a keyway, confirm the bore is large enough to accommodate the key after machining — contact us to confirm before ordering.

What does the step diameter mean, and why does it matter?

The step diameter refers to the larger-diameter collar machined behind the gear face. It acts as a built-in axial stop against a bearing face or housing shoulder, preventing the gear from sliding along the shaft under thrust loads. Match the step diameter to your housing bore or bearing inner race for a clean fit.

Will this gear mesh with my existing Mod 1.5 rack or wheel?

Yes — any gear or rack with a 1.5 module (Mod 1.5) and a standard 20° pressure angle will mesh correctly with this pinion. Module and pressure angle must both match for proper engagement. Do not mix with Mod 1.0, Mod 2.0, or DP (diametral pitch) gears.

How strong is 45# carbon steel for gear applications?

45# carbon steel (equivalent to C45 / SAE 1045) has a tensile strength of approximately 600–800 MPa in the normalized condition and can be heat-treated to increase surface hardness. It is well-suited for moderate-load, moderate-speed spur gear applications such as DIY CNC drives, conveyor systems, and robotics joints. For very high-load or high-speed applications, consider gears made from alloy steel or with surface hardening.

Is this gear corrosion-resistant for outdoor or humid environments?

45# carbon steel is not inherently corrosion-resistant. For outdoor, humid, or washdown environments, apply a rust-inhibiting grease or coating after installation, or consider stainless steel alternatives. Regular lubrication will significantly extend service life in moderately damp conditions.

Can I order a single piece to test fit before buying a larger quantity?

Yes — each variant is available in a 1-piece pack, making it straightforward to verify fit and mesh quality before committing to a 3 or 5-piece order. Simply select your tooth count, bore diameter, step diameter, and "1 Pcs" from the quantity option.

What lubrication is recommended for these spur gears?

A light machine oil or gear grease with an NLGI Grade 1–2 rating is suitable for most low-to-medium speed applications. For enclosed gearboxes, use an ISO VG 220 gear oil. Reapply lubrication periodically based on operating hours and load conditions to minimize wear.

🛒 Select your tooth count, bore diameter, step diameter, and pack quantity above, then add to cart.

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