2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer
2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer
2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer
2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer
2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer
2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer
2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer
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2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer

2GT 65T-120T Timing Belt Pulleys Pitch 2mm BF-type Width 7mm For 3D CNC Printer

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Price:
$7.98 USD
Stock:
In stock (500 units), ready to be shipped

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Description

2GT Timing Belt Pulleys 65T–120T — Precise, Slip-Free Motion for 3D Printers & CNC Machines

When your 3D printer skips steps or your CNC router loses position mid-cut, the culprit is often a worn or mismatched timing pulley. These 2GT BF-type timing belt pulleys are engineered for makers, hobbyists, and small workshop operators who need reliable, repeatable motion without the guesswork of sourcing compatible parts.

Each 2GT timing belt pulley features a 2mm pitch profile machined to mesh cleanly with standard 2GT/GT2 open-loop and closed-loop timing belts. The BF-type flange design keeps the belt tracking straight under load. Belt width compatibility is 7mm (fits 6mm belts with flange clearance). Tooth counts span 65T to 120T, with bore options from 5mm to 25mm (including 6.35mm and 12.7mm for imperial shaft compatibility). Overall pulley outer diameter scales with tooth count — typically ranging from approximately 41mm (65T) to approximately 76mm (120T).

Typical use cases include DIY CoreXY and Cartesian 3D printer builds requiring large-diameter idler or drive pulleys, CNC router axis drives where high tooth count reduces belt wrap angle stress, and educational robotics or automation lab setups needing interchangeable motion components.

✅ Compatible with: 2GT / GT2 timing belts, 6mm belt width, standard metric and select imperial motor shafts (5 / 6 / 6.35 / 8 / 10 / 12 / 12.7 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 25mm bore). Verify your shaft diameter before ordering.

✅ Key Features of These 2GT Timing Belt Pulleys

⚙️
Wide Tooth Count Range

Available in 14 models from 65T to 120T, giving you the flexibility to tune gear ratio and belt wrap angle for your specific drive system.

📐
2mm Pitch — GT2 Standard

The 2GT timing belt pulleys use the industry-standard 2mm pitch, ensuring direct compatibility with GT2 open and closed timing belts used across most desktop 3D printers and CNC platforms.

🔩
BF-Type Dual Flange

The BF flange configuration on both sides of the pulley keeps the belt centered and prevents lateral walk during high-speed or high-load operation.

🎯
Broad Bore Selection

Bore options from 5mm to 25mm — including 6.35mm (1/4") and 12.7mm (1/2") for imperial shafts — let you mount directly onto stepper motor shafts, servo shafts, or custom axles without adapters.

🏗️
7mm Belt Width Groove

The 7mm-wide groove accommodates standard 6mm GT2 belts with proper flange clearance, maintaining belt alignment in both open-loop and tensioned closed-loop configurations.

🔄
Consistent Machining Tolerance

Each pulley is machined to consistent dimensional tolerances so tooth pitch error stays low — critical for maintaining positional accuracy in CNC routing and 3D printing applications.

📐 Technical Specifications — 2GT Timing Belt Pulleys

Belt Profile 2GT (GT2)
Pitch 2mm
Pulley Type BF-type (dual flange)
Tooth Count (Models) 65T, 66T, 68T, 70T, 72T, 74T, 75T, 76T, 78T, 80T, 90T, 100T, 110T, 120T
Belt Width Compatibility 6mm (7mm groove width)
Bore Diameter Options 5 / 6 / 6.35 / 8 / 10 / 12 / 12.7 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 25mm
Outer Diameter (approx.) See variant options
Material See variant options
Finish See variant options
Quantity per Order 1 piece

❓ Frequently Asked Questions

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

Tooth count determines the pulley's outer diameter and affects your drive ratio. Higher tooth counts (e.g., 100T–120T) produce larger-diameter pulleys suited for idler or reduction applications. Lower counts (65T–80T) are common for direct-drive axis pulleys. Match your tooth count to your belt loop length and desired mechanical advantage.

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

Standard NEMA 17 stepper motors have a 5mm output shaft. Select the 5mm bore variant for a direct fit. If your motor has a D-cut shaft, you will need to add a set screw or use a shaft coupler — the bore diameter itself does not include a keyway unless specified.

Are these pulleys compatible with GT2 belts from other brands?

Yes. The 2GT profile is an industry-standard 2mm pitch tooth geometry. These pulleys are compatible with any GT2 / 2GT open-loop or closed-loop timing belt with a 6mm width, regardless of brand, as long as the pitch matches.

What is the BF-type flange and why does it matter?

BF-type means the pulley has flanges on both sides of the tooth groove. This dual-flange design physically constrains the belt from sliding off laterally, which is especially important in high-speed 3D printer gantry systems and CNC machines where belt tension and direction changes can cause lateral drift.

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

Yes. Large-tooth-count pulleys (80T–120T) are commonly used as idler pulleys in CoreXY and H-bot configurations to redirect belt paths. Ensure the bore matches your idler shaft or bearing outer diameter, and confirm the belt width matches your existing belt (6mm for these pulleys).

Do these pulleys include set screws or mounting hardware?

Mounting hardware inclusion varies by variant. Please check the product images and variant description for your selected model. If set screws are not included, standard M3 or M4 grub screws are widely available and compatible with most bore sizes in this range.

What is the difference between the 6.35mm and 6mm bore options?

The 6mm bore fits standard metric shafts. The 6.35mm bore (1/4 inch) is sized for imperial shafts common in North American servo motors and some hobby CNC spindles. Measure your shaft diameter precisely before selecting — a 0.35mm difference will result in a loose or non-fitting bore.

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

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