1 Modul 45# Steel Spur Gears Pinion Gear Thick 10mm 8-200 Teeth Dia 18~153mm

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1 Modul 45# Steel Spur Gears Pinion Gear Thick 10mm 8-200 Teeth Dia 18~153mm

Name: 1 Modul 45# Steel Spur Gears Pinion Gear Thick 10mm 8-200 Teeth Dia 18~153mm
Brand: HomeDIYer
Price: 6.22 USD
Availability: InStock

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Number Of Teeths: 8 Teeth

Size(mm): 2.3X10X11.8

Quantities: 1

Price:

$6.22 USD

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In stock (500 units), ready to be shipped

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1 Module 45# Steel Spur Gears — Precision Pinion Gears for DIY Automation & Robotics

When your automation project demands reliable, slip-free power transmission, finding a spur gear that matches your shaft bore, tooth count, and face width in one place is rarely straightforward. Whether you are a maker building a CNC router, an engineer prototyping a conveyor system, or a hobbyist assembling a robotic arm, these 1 module 45# steel spur gears give you the dimensional precision and material strength to keep your drivetrain running true.

Each gear is machined from 45# medium-carbon steel — a structural steel known for its balance of hardness and machinability — and features a uniform face width of 10 mm (0.39 in). The bore diameter ranges from 2.3 mm to 14 mm depending on the variant selected, and the pitch circle diameter scales from approximately 18 mm (0.71 in) for the 8-tooth gear up to approximately 153 mm (6.02 in) for the 200-tooth gear, all at a standard 1 module pitch. Available in quantities of 1, 5, or 10 pieces per order.

Typical use cases include small-format CNC axis drives requiring a 1 mod steel pinion gear, open-frame robotic joint assemblies needing a compact spur gear with a 6 mm or 8 mm bore, and educational mechatronics kits where a wide tooth-count selection — from 8 teeth to 200 teeth — lets students explore gear ratio calculations hands-on.

⚙️ Compatibility: Designed for 1 module (Mod 1) gear systems. Mates with any standard Mod 1 rack, pinion, or mating gear. Verify bore diameter against your shaft size before ordering — see Size(mm) option for bore × OD × thickness values.

✅ Key Features of These 1 Module 45# Steel Spur Gears

🔩

45# Medium-Carbon Steel Construction

Machined from 45# structural steel for a working balance of surface hardness, tensile strength, and ease of secondary machining such as keyway cutting or bore enlargement.

📐

Standard 1 Module (Mod 1) Pitch

Fully interchangeable with any Mod 1 rack or mating gear. Tooth profile follows standard involute geometry for smooth, low-noise meshing across the full tooth-count range of 8 to 200 teeth.

📏

Uniform 10 mm Face Width

A consistent 10 mm (0.39 in) face width across all variants simplifies axial alignment in multi-gear assemblies and provides adequate load-bearing surface for light-to-medium duty applications.

🎯

Wide Tooth-Count Selection: 8 to 200 Teeth

Choose from 8, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 65, 70, 75, 80, 85, 90, 95, 100, 110, 120, 130, 140, 150, 160, 180, or 200 teeth to dial in your exact gear ratio.

🔄

Multiple Bore Sizes Available

Bore diameters span from 2.3 mm up to 14 mm depending on the selected Size(mm) variant (format: bore × OD × thickness). Match the bore to your motor shaft or output shaft without additional machining in most cases.

📦

Flexible Pack Quantities: 1, 5, or 10 Pieces

Order a single gear for a one-off prototype, a 5-pack for a small batch build, or a 10-pack for workshop stock. Bulk quantities reduce per-unit cost for recurring projects.

📐 Technical Specifications — 1 Module Steel Spur Gear

Module	1 (Mod 1)
Material	45# Medium-Carbon Steel
Face Width (Thickness)	10 mm (0.39 in)
Number of Teeth	8 – 200 teeth (see variant options)
Bore Diameter	2.3 mm – 14 mm (see variant options)
Pitch Circle Diameter	~18 mm – ~200 mm (= module × teeth)
Outside Diameter	See variant options
Pressure Angle	20° (standard involute)
Tooth Profile	Standard involute spur
Surface Finish	See variant options
Pack Quantity	1 / 5 / 10 pieces (see variant options)
Weight	See variant options

❓ Frequently Asked Questions

How do I choose the right tooth count for my gear ratio?

Divide the number of teeth on the driven gear by the number of teeth on the driving gear to get the gear ratio. For example, pairing a 20-tooth pinion with a 60-tooth gear gives a 3:1 reduction. Use this catalog's wide range — 8 to 200 teeth — to achieve ratios from roughly 1:1 up to 25:1 or more in a single stage.

What bore size should I select for my motor shaft?

The Size(mm) option is formatted as bore × OD × thickness. Choose the bore value that matches your shaft diameter. Common motor shaft sizes are 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, and 14 mm. If your shaft is slightly undersized, the bore can typically be enlarged with a reamer or boring bar.

How strong are these gears for my application?

45# steel has a tensile strength of approximately 600–800 MPa and a yield strength of around 355 MPa in the normalized condition. These gears are suited for light-to-medium duty applications such as CNC axis drives, robotic joints, conveyor systems, and educational mechatronics rigs. For heavy-duty or high-shock-load applications, consider hardened or alloy steel gears.

Are these gears corrosion-resistant?

45# carbon steel has limited inherent corrosion resistance. For indoor or dry environments, the bare steel finish is adequate. For humid, outdoor, or washdown environments, apply a light machine oil, grease, or consider a zinc-plated or stainless alternative. Regular lubrication also extends gear life and reduces wear noise.

Will this gear mesh with my existing Mod 1 rack or gear?

Yes. Any gear or rack with a 1 module (Mod 1) pitch and a 20° pressure angle will mesh correctly with these gears. Confirm the module and pressure angle of your existing components before ordering. Mod 1 is one of the most common metric gear standards and is widely used in hobby CNC, 3D printer extruder drives, and small robotics platforms.

Should I order 1, 5, or 10 pieces?

Order 1 piece for prototyping or a single-axis build. Choose 5 pieces if you are building a multi-axis machine or want a spare on hand. The 10-piece pack offers the lowest per-unit cost and is ideal for workshop stock, classroom kits, or small-batch production runs where consistent gear geometry across units is important.

What is the pitch circle diameter for a given tooth count?

For a 1 module gear, the pitch circle diameter (PCD) equals the number of teeth in millimeters. For example, a 20-tooth gear has a PCD of 20 mm, a 60-tooth gear has a PCD of 60 mm, and a 100-tooth gear has a PCD of 100 mm. The outside diameter is typically PCD + 2 mm (i.e., module × (teeth + 2)).

🛒 Select your Number of Teeth, Size(mm), and Quantity above, then add to cart.

1 Modul 45# Steel Spur Gears Pinion Gear Thick 10mm 8-200 Teeth Dia 18~153mm

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Description

1 Module 45# Steel Spur Gears — Precision Pinion Gears for DIY Automation & Robotics

✅ Key Features of These 1 Module 45# Steel Spur Gears

📐 Technical Specifications — 1 Module Steel Spur Gear

❓ Frequently Asked Questions

1 Modul 45# Steel Spur Gears Pinion Gear Thick 10mm 8-200 Teeth Dia 18~153mm

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