GT2 10mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm
GT2 10mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm
GT2 10mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm
GT2 10mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm
Roll over image to zoom in Click on image to zoom
GT2 10mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mmGT2 10mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mmGT2 10mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mmGT2 10mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm

GT2 10mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm

HomeDIYer
No reviews

By HomeDIYer®

Price:
$11.67 USD
Stock:
In stock (500 units), ready to be shipped

Payment & Security

Ach Direct Debit Amazon American Express Apple Pay Bancontact BLIK Diners Club Discover EPS Google Pay iDEAL Wero JCB Maestro Mastercard Multibanco MobilePay PayPal Przelewy24 Shop Pay Twint Union Pay USDC Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Limited Offer — Spend More, Save More
Spend $55+
Save $5
Spend $100+
Save $10
Spend $200+
Save $25
✅ Discount applied automatically at checkout 🚚 Free shipping on orders over $89
HomeDIYer DIY Expert Support

DIY Expert Support

Get fitment advice & recommendations

Mon–Fri  8:30 AM – 8:00 PM
WhatsApp
24-Hour Fast Ship
Arrives in 3–14 Days
Worldwide Shipping
30-Day Returns
1 tree planted with every purchase

Description

GT2 10mm Timing Belt Toothed Idler Drive Pulley — Precision Motion Control for DIY Builders

When your 3D printer skips steps, your CNC router loses position, or your belt-driven automation project needs a reliable tensioning solution, the root cause is often an undersized or mismatched pulley. This GT2 10mm timing belt toothed idler drive pulley is engineered for makers, hobbyists, and small-workshop builders who demand repeatable, slip-free motion from their belt drive systems.

Each pulley is machined to suit the GT2 (2mm pitch) belt profile with a 10mm (0.39 in) tooth width. Available in 20 to 60 tooth counts and bore diameters ranging from 3mm to 15mm (approximately 0.12 in to 0.59 in), these pulleys are offered individually (1 piece per order) so you can source exactly the configuration your build requires without over-buying.

Typical use cases include GT2 belt tensioner idler replacement on Ender-series and Prusa-style 3D printers, X/Y axis drive pulley upgrades on desktop CNC routers, and custom belt-driven linear actuator builds for DIY automation rigs. The toothed profile ensures positive engagement with GT2 belts, eliminating the belt slip that plagues smooth-bore idlers in high-torque or high-speed applications.

⚙️ Compatible with: GT2 (2mm pitch) timing belts, 10mm belt width — fits Ender 3/5, CR-10, Prusa i3 MK3, Voron, and most open-frame CNC belt drive systems.

✅ Key Features of These GT2 Timing Belt Toothed Idler Drive Pulleys

🦷 Toothed Profile for Positive Engagement

The GT2 tooth geometry locks into the belt's inner profile, preventing slip under load — critical for accurate positioning in 3D printing and CNC routing.

📐 Wide Tooth Count Range (20–60T)

Fifteen tooth count options from 20T to 60T let you match the exact gear ratio or belt wrap angle your drive system requires.

🔩 Multiple Bore Sizes (3–15mm)

Ten bore diameter options from 3mm to 15mm accommodate a broad range of motor shafts, idler axles, and custom spindle diameters without additional machining.

📏 10mm Tooth Width for Standard GT2 Belts

Matched to the widely used 10mm-wide GT2 belt, ensuring full tooth contact across the belt face for even load distribution and reduced wear.

🔄 Suitable as Drive or Idler Pulley

The toothed bore design allows use as a driven pulley on a motor shaft or as a toothed idler for belt tensioning — versatile across multiple positions in a single drivetrain.

🛠️ Drop-In Replacement for Common Platforms

Dimensionally compatible with standard GT2 pulley mounting patterns used on popular open-source 3D printer and CNC platforms, reducing retrofit time.

📐 Technical Specifications — GT2 Timing Belt Pulley

Belt Profile GT2 (2mm pitch)
Tooth Width 11mm (approx. 0.43 in)
Number of Teeth 20 / 22 / 24 / 25 / 26 / 28 / 30 / 32 / 34 / 35 / 36 / 38 / 40 / 50 / 60
Bore Diameter 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 12 / 15mm — See variant options
Outer Diameter (OD) See variant options
Material See variant options
Quantity per Order 1 piece
Compatible Belt Width 10mm
Pitch 2mm (GT2)
Application 3D printer, CNC router, belt-driven linear actuator, DIY automation

❓ Frequently Asked Questions

How do I choose the right number of teeth for my build?

The tooth count determines the pulley's pitch diameter and affects your drive ratio. For most 3D printer X/Y axes, 20T is the standard choice. Higher tooth counts (40T–60T) are used where you need a larger pitch diameter, reduced belt wrap angle on an idler, or a specific gear ratio in a multi-pulley drivetrain. Match the tooth count to your motor steps-per-mm calculation or existing system specification.

Which bore size should I select for my stepper motor shaft?

Most NEMA 17 stepper motors used in 3D printers and small CNC machines have a 5mm shaft diameter — select the 5mm bore variant. NEMA 23 motors typically use an 8mm shaft. For idler applications on a bolt or axle, measure the axle diameter and select the matching bore. If your shaft has a flat (D-cut), you will need to add a set screw or use a shaft coupler, as these pulleys use a round bore.

Is this pulley compatible with standard GT2 belts?

Yes. This pulley is designed for the GT2 (2mm pitch) belt profile with a 10mm belt width. It is compatible with GT2 open-loop and closed-loop belts of 10mm width commonly used in Ender 3, Ender 5, CR-10, Prusa i3 MK3, Voron, and similar platforms. Do not use with HTD, T2.5, or T5 belts — the tooth profiles are not interchangeable.

Can I use this as both a drive pulley and an idler pulley?

Yes. Because this pulley is toothed, it can function as a motor-driven pulley (mounted on a motor shaft) or as a toothed idler (mounted on a fixed axle to guide and tension the belt while maintaining tooth engagement). Smooth-bore idlers are used where the belt's outer surface contacts the idler; this toothed version is used where you want the belt's inner teeth to engage the idler for positive tracking.

How strong and durable are these pulleys under continuous operation?

These pulleys are suited for the light-to-medium duty loads typical of desktop 3D printers, small CNC routers, and DIY automation projects. For continuous industrial-duty or high-torque applications, please contact us to confirm suitability. The material specification varies by variant — see variant options or contact us to confirm the material for your selected configuration.

Do these pulleys include flanges to keep the belt aligned?

Flange configuration varies by variant. Many GT2 pulleys in this range include integrated flanges on one or both sides to prevent the belt from walking off the pulley face during operation. Please review the product images for your selected tooth count and bore combination, or contact us to confirm the flange configuration before ordering.

What is the pitch diameter for a given tooth count?

For a GT2 (2mm pitch) pulley, the pitch diameter is calculated as: PD = (Number of Teeth × Pitch) ÷ π. For example, a 20T pulley has a pitch diameter of approximately 12.73mm (0.50 in), and a 40T pulley has a pitch diameter of approximately 25.46mm (1.00 in). Use this to calculate belt length, center distance, and drive ratio for your specific build.

🛒 Select your Number of Teeth, Bore diameter, and Tooth Width above, then add to cart.

You may also like

Recently viewed