2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer
2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer
2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer
2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer
2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer
2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer
2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer
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2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer

2GT 65-120T Timing Belt Pulley Pitch 2mm With Step Width 11mm For 3D CNC Printer

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Price:
$9.78 USD
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In stock (500 units), ready to be shipped

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Description

2GT Timing Belt Pulley 65–120T — Precise 2mm Pitch Drive for 3D Printers & CNC Machines

When a slipping or mismatched pulley costs you a failed print or a ruined workpiece, the root cause is almost always a poorly toleranced bore or an incompatible tooth profile. Makers, workshop builders, and automation engineers who demand repeatable, backlash-free motion need a 2GT timing belt pulley they can trust across every axis of their build.

This 2GT timing belt pulley series features a 2mm tooth pitch and a stepped hub design with an 11mm belt-contact width. Available tooth counts span 65T through 120T, covering pitch diameters from approximately 41.4 mm (1.63 in) at 65T up to approximately 76.4 mm (3.01 in) at 120T. Bore options range from 5 mm to 25 mm (0.20 in – 0.98 in), including fractional sizes 6.35 mm (1/4 in) and 12.7 mm (1/2 in) for imperial shaft compatibility.

Typical use cases include replacement drive pulleys on Cartesian and CoreXY 3D printers, feed-axis pulleys on desktop CNC routers, and custom belt-driven linear actuators for DIY automation rigs. The wide tooth-count range also makes this series suitable for gear-ratio tuning in robotics projects and educational lab equipment.

⚙️ Compatibility: Fits standard 2GT / GT2 open or closed timing belts with 10–11 mm width. Verify shaft diameter before ordering — bore sizes are fixed and cannot be re-bored after purchase.

✅ Key Features of These 2GT Timing Belt Pulleys

🦷 Wide Tooth-Count Range (65T–120T)

Fourteen tooth-count options let you dial in the exact pitch diameter and gear ratio your drive system requires, from compact 65T pulleys to large 120T reduction stages.

📐 2mm GT2-Profile Tooth Pitch

The 2mm pitch GT2 tooth profile meshes cleanly with standard 2GT belts, minimizing backlash and maintaining positional accuracy across high-cycle motion applications.

🔩 Stepped Hub with 11mm Belt Width

The integrated step flanges keep the belt centered on the pulley face, reducing edge wear and preventing belt walk during continuous operation.

🎯 Broad Bore Selection (5–25mm)

Fifteen bore sizes — including 6.35 mm and 12.7 mm fractional options — cover metric and imperial motor shafts from NEMA 17 stepper outputs to larger servo drives.

🏭 Machined Aluminum Construction

Turned from aluminum alloy stock, each pulley is lightweight yet rigid, keeping rotational inertia low for responsive acceleration in motion-control applications.

🔄 Drop-In Replacement Geometry

Standard 2GT outer dimensions mean these pulleys interchange directly with OEM pulleys on most 3D printer and CNC platforms without frame modifications.

📐 Technical Specifications — 2GT Timing Belt Pulley

Tooth Profile 2GT (GT2)
Tooth Pitch 2 mm
Tooth Count Options 65T, 66T, 68T, 70T, 72T, 74T, 75T, 76T, 78T, 80T, 90T, 100T, 110T, 120T
Belt Width (Contact) 11 mm (step hub design)
Compatible Belt Width 10–11 mm
Bore Diameter Options 5, 6, 6.35, 8, 10, 12, 12.7, 14, 15, 16, 17, 18, 19, 20, 25 mm
Pitch Diameter Range Approx. 41.4 mm (65T) – 76.4 mm (120T)
Hub Style Stepped flange (belt-retaining)
Material Aluminum alloy
Set Screw See variant options
Keyway See variant options
Surface Finish See variant options
Unit Quantity 1 piece per order

❓ Frequently Asked Questions

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

Select the tooth count based on the pitch diameter your drive geometry requires. Pitch diameter = (Tooth Count × Pitch) ÷ π. For example, a 2GT-80T pulley has a pitch diameter of approximately 50.9 mm. If you are replacing an existing pulley, match the tooth count exactly. If you are designing a new drive, choose a tooth count that achieves your target belt speed or gear ratio when paired with your motor pulley.

Which bore size should I order for a NEMA 17 stepper motor?

Standard NEMA 17 stepper motors have a 5 mm output shaft. Select the 5 mm bore variant. If your motor has a D-cut or flat on the shaft, ensure the set screw on the pulley aligns with the flat for a secure, non-slip connection. For other motor types, measure the shaft diameter with calipers before ordering.

Are these pulleys compatible with GT2 belts from other brands?

Yes. The 2GT tooth profile is an industry-standard geometry. These pulleys are compatible with any 2GT or GT2 timing belt with a 2 mm pitch and 10–11 mm width, regardless of brand. Avoid mixing 2GT pulleys with MXL, T2.5, or other pitch belts, as the tooth profiles are not interchangeable.

What material are these pulleys made from, and how durable are they?

The pulleys are machined from aluminum alloy, which provides a good balance of low rotational inertia, adequate strength for belt-drive loads, and resistance to corrosion in typical indoor environments. For high-load or high-humidity applications, consider applying a light machine oil to the bore contact surface. Aluminum pulleys are not recommended for continuous immersion in water or aggressive chemical environments.

Can I use these pulleys in a CoreXY or H-bot 3D printer?

Yes. The 2GT profile and 2 mm pitch are the standard specification used in CoreXY, H-bot, and Cartesian 3D printer motion systems. Select the tooth count that matches your printer's original specification — most desktop CoreXY printers use 20T motor pulleys paired with larger idler or reduction pulleys. This series covers the larger reduction-stage pulleys from 65T upward.

Do the pulleys include set screws, and can I add a keyway?

Set screw configuration varies by variant — please refer to the product images or contact us to confirm for your specific tooth count and bore combination. Keyway availability also depends on the variant. If your application requires a keyway for high-torque transmission, contact us before ordering to confirm availability for your selected model and bore size.

What is the pitch diameter and outer diameter for a specific tooth count?

Pitch diameter is calculated as (Tooth Count × 2 mm) ÷ π. Representative values: 65T ≈ 41.4 mm, 70T ≈ 44.6 mm, 80T ≈ 50.9 mm, 90T ≈ 57.3 mm, 100T ≈ 63.7 mm, 120T ≈ 76.4 mm. Outer diameter is typically 1–2 mm larger than pitch diameter. For precise CAD dimensions, contact us and specify your tooth count.

🛒 Select your Model (tooth count) and Bore diameter above, then add to cart.

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