5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear
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5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear

5 Modulus 10-70Tooth Spur Gears 45# Steel Thickness 40mm Motor Power Drive Gear

HomeDIYer
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By HomeDIYer®

Price:
$41.41 USD
Stock:
In stock (500 units), ready to be shipped

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Description

5 Modulus Spur Gears in 45# Steel — Reliable Motor Power Transmission for DIY Automation

When your automation project demands consistent torque transfer and zero slip, undersized or poorly machined gears become the weakest link in the chain. Whether you are building a CNC router, a conveyor drive, or a custom rotary indexer, these 5 modulus spur gears give hobbyists, makers, and small workshop operators a dependable mechanical foundation without the lead time of custom machining.

Each gear is machined from 45# medium-carbon steel — a material known for its balanced hardness and machinability — and features a 40 mm (1.57 in) face width. Tooth counts span from 10T to 70T (5M pitch), giving you a pitch diameter range of approximately 50 mm (1.97 in) for the 10T up to 350 mm (13.78 in) for the 70T. Bore diameter and keyway dimensions vary by tooth count; see variant options for exact bore specs.

Typical use cases include motor-to-shaft power drives in DIY CNC machines, speed-reduction stages in conveyor belt systems, and rotary indexing tables in small workshop automation rigs — all applications where a standard 5M tooth profile ensures interchangeability with off-the-shelf 5M timing and spur gear accessories.

⚙️ Compatibility: Designed for 5 Modulus (5M) gear systems. Pairs with any 5M mating spur gear, rack, or pinion. Verify bore diameter and keyway dimensions against your shaft spec before ordering.

✅ Key Features of These 5 Modulus Spur Gears

  • 🔩45# Steel Construction — Medium-carbon steel delivers a strong balance of surface hardness and core toughness, resisting wear under sustained rotational loads in motor drive applications.
  • 📏40 mm Face Width — A generous 40 mm (1.57 in) tooth face distributes load evenly across the gear mesh, reducing contact stress and extending service life compared to narrower alternatives.
  • 🔢Wide Tooth-Count Range (10T–70T) — 47 tooth-count variants from 10T to 70T let you dial in the exact gear ratio your drive system requires without custom machining.
  • 📐Standard 5M Tooth Profile — Conforms to the 5 modulus involute tooth standard, ensuring full interchangeability with any 5M mating gear, rack, or pinion from any compatible supplier.
  • 🏭Machined Bore & Keyway — Each gear ships with a machined center bore and keyway slot sized to the tooth count, ready for direct shaft mounting with a standard key and set screw.
  • 🔄Versatile Drive Applications — Suited for CNC router axes, conveyor drives, rotary indexers, and general-purpose motor power transmission in DIY and light industrial automation builds.

📐 Technical Specifications — 5 Modulus Spur Gears

Modulus 5M
Tooth Count Range 10T – 70T (47 variants)
Face Width (Thickness) 40 mm (1.57 in)
Material 45# Medium-Carbon Steel
Tooth Profile Involute Spur (Standard 5M)
Pitch Diameter See variant options (Modulus × Tooth Count)
Bore Diameter See variant options
Keyway See variant options
Surface Finish Machined, natural steel
Weight See variant options
Pressure Angle 20°

❓ Frequently Asked Questions

How do I choose the right tooth count for my drive system?

Determine your required gear ratio first: divide the driver tooth count by the driven tooth count to get the ratio. For example, a 20T driver meshing with a 40T driven gear gives a 1:2 reduction (output speed halved, torque doubled). Select tooth counts that achieve your target ratio while keeping the center distance practical for your build envelope.

What is the pitch diameter for a given tooth count?

For a 5 modulus gear, pitch diameter (mm) = Modulus × Tooth Count. So a 5M 20T gear has a pitch diameter of 100 mm (3.94 in), and a 5M 40T gear has a pitch diameter of 200 mm (7.87 in). Use this formula to calculate center distance between two mating gears: (PD1 + PD2) ÷ 2.

What bore diameter and keyway size does each variant have?

Bore diameter and keyway dimensions vary by tooth count, as larger gears require a proportionally larger hub. Please check the variant detail page or contact us to confirm the exact bore and keyway dimensions for your selected tooth count before ordering.

Is 45# steel strong enough for my motor drive application?

45# medium-carbon steel offers a tensile strength of approximately 600–800 MPa in its normalized state, making it well-suited for moderate-load motor drive, conveyor, and indexing applications. For very high-torque or high-speed industrial drives, consider whether a heat-treated or alloy steel gear would better match your load requirements.

Are these gears corrosion-resistant?

45# steel is not inherently corrosion-resistant. For indoor, dry environments these gears perform well with standard lubrication. If your application involves moisture, coolant exposure, or outdoor conditions, apply a rust-inhibiting grease or consider a protective coating after installation to extend service life.

Will these gears mesh with other 5M spur gears or racks I already have?

Yes. These gears conform to the standard 5 modulus involute tooth profile with a 20° pressure angle, which is the industry-standard geometry for 5M components. They will mesh correctly with any other 5M spur gear, rack, or pinion that also uses the 20° pressure angle standard, regardless of supplier.

Do I need to purchase a key and set screw separately?

The gear ships with a machined keyway slot but does not include a key or set screw. You will need to source a standard parallel key sized to the keyway dimensions of your selected variant, along with an appropriate set screw, to secure the gear to your shaft.

🛒 Select your tooth count (Number of tooth) above, then add to cart.

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