GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor
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GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC MotorGT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor

GT2 Timing Pulley Belt 2mm Pitch 16 - 60 Tooth Bore 3.17mm - 12mm for CNC Motor

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Price:
$2.57 USD
Stock:
In stock (500 units), ready to be shipped

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Description

GT2 Timing Pulley — Precision 2mm Pitch Drive for CNC & 3D Printer Builds

When your CNC router skips steps or your 3D printer loses position mid-print, the culprit is often a mismatched or worn timing pulley. Makers, engineers, and workshop builders who demand repeatable motion need a GT2 timing pulley they can trust to mesh cleanly with standard GT2 belts and hold bore tolerances that actually fit their motor shafts.

These GT2 timing pulleys feature a 2mm pitch tooth profile machined to mate with standard GT2 open-loop and closed-loop belts. Available in 16, 20, 25, 30, 40, and 60 tooth counts with bore diameters ranging from 3.17mm (~1/8 in) to 12mm (~0.47 in), each pulley is supplied with set-screw retention for secure shaft mounting. The compact hub design keeps rotational inertia low while the tooth geometry maintains positive belt engagement across the full speed range.

Typical use cases include CoreXY and Cartesian 3D printer axis drives, CNC router gantry and Z-axis lead systems, small robotic arm joint drives, and DIY linear actuator builds where a GT2 timing pulley with a precise bore-to-shaft fit is essential for accurate positioning.

✅ Compatible with: Standard GT2 2mm pitch open & closed-loop belts, NEMA 17 / NEMA 23 stepper motor shafts (with matching bore), and common CNC / 3D printer motion systems.

✅ Key Features of These GT2 Timing Pulleys

⚙️
2mm GT2 Tooth Profile

Precision-cut GT2 tooth geometry ensures smooth, low-backlash engagement with standard GT2 belts for accurate linear motion.

📐
Wide Tooth & Bore Range

Choose from 16 to 60 tooth counts and bore diameters from 3.17mm to 12mm to match your motor shaft and drive ratio requirements.

🔩
Set-Screw Shaft Retention

Each pulley includes a set-screw for positive shaft locking, preventing slippage under dynamic loads without requiring adhesives or press-fit tools.

🏗️
Compact Low-Inertia Hub

The slim hub profile minimises rotational inertia, allowing faster acceleration and deceleration in high-cycle CNC and 3D printing applications.

🔄
Multi-Quantity Packs Available

Order 1, 2, 4, 5, or 10 pieces per variant to stock spares or equip multi-axis machines in a single purchase.

🛠️
Drop-In Replacement Fit

Dimensioned to standard GT2 pulley specifications, making these a direct drop-in replacement for worn or undersized pulleys on existing machines.

📐 Technical Specifications — GT2 Timing Pulley

Belt Pitch GT2 — 2mm
Tooth Count Options 16T / 20T / 25T / 30T / 40T / 60T
Bore Diameter Options 3.17mm / 4mm / 5mm / 6mm / 6.353mm / 8mm / 10mm / 12mm
Belt Width Compatibility See variant options
Hub Retention Set-screw (included)
Material See variant options
Finish See variant options
Quantity per Pack 1 / 2 / 4 / 5 / 10 pcs (select above)
Tooth Profile Standard GT2 (2mm pitch)
Shaft Fit Bore-to-shaft clearance fit; secured with set-screw

❓ Frequently Asked Questions

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

Tooth count determines your drive ratio and belt speed. A smaller pulley (e.g., 16T) on the motor paired with a larger pulley on the driven axis reduces speed and increases torque. For most 3D printer and CNC router axis drives, 20T is a common starting point. Match your tooth count to your existing belt loop length and desired steps-per-mm calculation.

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

Standard NEMA 17 stepper motors have a 5mm output shaft diameter. Select the 5mm bore variant for a direct fit. If your motor has a D-shaft (flat on one side), the set-screw will lock against the flat for a more secure connection. For NEMA 23 motors, the shaft is typically 6.35mm — choose the 6.353mm bore variant.

Are these pulleys compatible with standard GT2 belts?

Yes. These pulleys are machined to the GT2 2mm pitch tooth profile and are compatible with standard GT2 open-loop belts (sold separately) as well as GT2 closed-loop timing belts. Ensure your belt width matches the pulley flange width — check the variant listing for belt width compatibility details.

How strong is the set-screw retention? Will the pulley slip under load?

The set-screw provides firm mechanical retention suitable for the torque levels typical of NEMA 17 and NEMA 23 stepper motors in CNC and 3D printing applications. For best results, tighten the set-screw against a D-shaft flat or use a small amount of thread-locking compound on the screw threads. Avoid exceeding the rated torque of your motor shaft.

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

Yes. CoreXY and H-bot motion systems commonly use 20T GT2 pulleys on the motor shafts and idler positions. These pulleys are dimensioned to standard GT2 specifications and are a direct fit for most CoreXY printer designs including Voron, RatRig, and similar open-source platforms. Confirm your motor shaft diameter before ordering.

What is the difference between the 6mm and 6.353mm bore options?

The 6mm bore is a metric bore for 6mm diameter shafts. The 6.353mm bore (approximately 1/4 inch) is sized for imperial quarter-inch shafts commonly found on some servo motors and North American-sourced stepper motors. Measure your motor shaft carefully with calipers before selecting — using the wrong bore will result in a loose or non-fitting pulley.

Do I need to buy a matching idler pulley separately?

For driven axis pulleys (motor-mounted), these toothed pulleys are what you need. If your design also requires smooth idler pulleys (for belt tensioning or direction changes), those are a separate item. Check your machine's BOM or motion system diagram to confirm whether you need toothed or smooth idler pulleys at each position.

🛒 Select your tooth count, bore diameter, and quantity above, then add to cart.

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