40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts
40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts
40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts
40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts
40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts
40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts
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40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts

40 Tooth Synchronous Wheel GT2 Timing Belt Pulley for 10 mm Width Drive Belts

HomeDIYer
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By HomeDIYer®

Price:
$9.93 USD
Stock:
In stock (500 units), ready to be shipped

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Description

GT2 40 Tooth Timing Belt Pulley — Precise Synchronous Drive for 10 mm Width Belts

When your 3D printer skips steps, your CNC router loses position, or your DIY automation project demands repeatable accuracy, the weak link is almost always the drive pulley. Makers, engineers, and workshop builders who rely on GT2 belt systems need a 40-tooth synchronous wheel that holds tight tolerances without slop or wobble — every single cycle.

This GT2 timing belt pulley is machined for 10 mm wide GT2 drive belts and is available in bore diameters ranging from 5 mm to 12 mm (approximately 0.20 in to 0.47 in). Each pulley features 40 evenly spaced teeth with a 2 mm GT2 tooth pitch, a flanged rim to keep the belt tracking true, and a set-screw hub for secure shaft mounting. Packs of 1, 2, 5, or 10 pieces let you stock exactly what your build requires.

Typical use cases include CoreXY and Cartesian 3D printer motion systems requiring consistent belt tension, CNC router axis drives where positional accuracy is non-negotiable, and lightweight robotic arm or conveyor automation projects that depend on synchronous torque transfer without belt slip.

⚙️ Compatibility: Designed for standard GT2 open-loop and closed-loop timing belts with 10 mm width and 2 mm pitch. Verify your shaft diameter matches the selected bore size before ordering.

✅ Key Features of These GT2 40 Tooth Timing Belt Pulleys

🦷 40-Tooth GT2 Profile

Forty evenly spaced 2 mm-pitch GT2 teeth deliver smooth, low-backlash power transmission — ideal for motion systems where positional repeatability matters.

📏 10 mm Belt Width Compatibility

Flanged rim keeps your 10 mm GT2 belt centered and prevents lateral drift during high-speed or high-cycle operation.

🔩 Multiple Bore Sizes Available

Choose from 5 mm, 6 mm, 6.35 mm (1/4 in), 8 mm, 10 mm, or 12 mm bore diameters to match your motor shaft or drive shaft without adapters.

🔧 Set-Screw Hub Mounting

Integrated set-screw secures the pulley firmly to the shaft, preventing rotational slip under load and simplifying installation without special tooling.

📦 Flexible Pack Quantities

Available in 1, 2, 5, or 10-piece packs — order a single replacement or stock up for multi-axis builds and production runs at a lower per-unit cost.

⚖️ Lightweight Aluminum Construction

Machined from aluminum alloy, these pulleys keep rotating mass low — reducing motor load and improving acceleration response in fast-moving motion systems.

📐 Technical Specifications — GT2 Timing Belt Pulley

Tooth Count 40 Teeth
Belt Profile GT2
Tooth Pitch 2 mm
Belt Width 10 mm
Bore Diameter See variant options (5 / 6 / 6.35 / 8 / 10 / 12 mm)
Material Aluminum Alloy
Mounting Set-screw hub
Flange Yes (both sides)
Pack Quantity See variant options (1 / 2 / 5 / 10 PCS)
Weight (per piece) See variant options

❓ Frequently Asked Questions

How do I choose the right bore size for my motor shaft?

Measure your motor or drive shaft diameter with a caliper. Common stepper motor shaft sizes are 5 mm and 6.35 mm (1/4 in); larger servo or NEMA 23 motors often use 8 mm or 10 mm shafts. Select the bore that matches your shaft exactly — the set-screw will secure it in place. If your shaft is between sizes, choose the next size up and use a shaft collar or shim.

Is a 40-tooth pulley the right tooth count for my application?

Tooth count determines the pulley's pitch diameter and, combined with your belt length and the driven pulley's tooth count, sets your gear ratio. A 40-tooth GT2 pulley has a pitch diameter of approximately 25.46 mm (1.00 in). For 3D printers and CNC routers, 40-tooth pulleys are commonly paired with 20-tooth pulleys to achieve a 2:1 reduction, or used in matched pairs for a 1:1 direct drive. Check your machine's motion design to confirm compatibility.

Will this pulley fit standard GT2 open-loop and closed-loop belts?

Yes. This pulley is machined to the GT2 tooth profile with a 2 mm pitch, which is compatible with both open-loop GT2 timing belts and closed-loop GT2 drive belts that are 10 mm wide. It is not compatible with GT3, HTD, or T2.5 belt profiles.

How strong is the set-screw connection — will it slip under load?

The set-screw hub provides a firm mechanical lock when tightened to the recommended torque using an appropriate hex key. For most 3D printer and light CNC applications, this connection is more than adequate. For high-torque or high-vibration environments, ensure the shaft has a flat (D-cut) for the set-screw to bear against, which significantly increases holding force and prevents rotational slip.

Does the pulley have flanges to keep the belt from slipping off?

Yes. This pulley includes flanges on both sides of the tooth section. The flanges guide the 10 mm GT2 belt and prevent it from walking off the pulley edge during operation, which is especially important in high-speed or vertically oriented belt runs.

Should I order 1 PCS or a multi-pack?

If you are replacing a single failed pulley on an existing machine, the 1 PCS option is the most economical choice. For new multi-axis builds (such as CoreXY 3D printers that use two X/Y pulleys), the 2 PCS pack ensures matched parts from the same batch. The 5 PCS and 10 PCS packs offer a lower per-unit cost and are ideal for workshop stock, classroom labs, or production of multiple machines.

Is this pulley compatible with NEMA 17 stepper motors?

NEMA 17 stepper motors typically have a 5 mm shaft diameter. Select the 5 mm bore variant for a direct fit. The 6.35 mm (1/4 in) bore variant is commonly used with NEMA 23 motors. Always verify your specific motor's shaft diameter in its datasheet before ordering.

🛒 Select your Bore & Amount above, then add to cart.

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