Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your motion-control build demands repeatable, slip-free power transfer, a mismatched or worn pulley becomes the weakest link in the chain. Engineers, makers, and automation builders who rely on GT2 belt drives need a pulley that holds tight tolerances across every cycle. These GT2 timing pulleys are machined to mesh cleanly with standard 2mm-pitch GT2/2GT belts, eliminating backlash and keeping your axis or drive system on target.
Each pulley is machined from aluminum alloy with a natural silver finish. The tooth profile follows the GT2 (2mm pitch) standard. Tooth counts span 28 to 60 teeth; bore diameters range from 4mm to 25mm (approximately 0.16 in to 0.98 in); tooth width is 10mm (approximately 0.39 in) with an 11mm belt-contact width. A set-screw hub secures the pulley to the shaft.
Typical applications include CNC router X/Y axis drives, FDM 3D printer extruder and motion systems, desktop laser cutter gantries, robotic arm joint drives, and custom linear-motion stages where a GT2 synchronous belt pulley with a precise bore-to-shaft fit is required.
Available in 28, 30, 32, 34, 35, 36, 38, 40, 42, 44, 45, 46, 48, 50, 52, 54, 56, 58, and 60 teeth — covering a broad gear-ratio range for speed or torque tuning in GT2 belt drive systems.
Bore options from 4mm to 25mm (including 5, 6, 6.35, 8, 10, 12, 12.7, 14, 15, 16, 17, 18, 19, 20, and 25mm) accommodate stepper motor shafts, servo shafts, and custom drive shafts without adapter sleeves.
The GT2 (2GT) 2mm-pitch tooth geometry provides smooth, low-noise engagement with GT2 timing belts, reducing vibration in high-speed CNC and 3D printer motion systems.
Machined from aluminum alloy for a balance of light weight and structural rigidity. The material resists corrosion in typical indoor workshop and lab environments.
Each pulley includes a set-screw hub for secure shaft mounting. The screw locks the pulley axially and rotationally, preventing slippage under load during continuous operation.
The 10mm tooth width (11mm belt-contact width) keeps the GT2 belt centered and reduces edge wear, extending belt service life in long-running automation and robotics applications.
| Belt Type | GT2 / 2GT, 2mm pitch |
|---|---|
| Tooth Count | 28 – 60 teeth (see variant options) |
| Bore Diameter | 4mm – 25mm (see variant options) |
| Tooth Width | 10mm (≈ 0.39 in) |
| Belt Contact Width | 11mm (≈ 0.43 in) |
| Pitch | 2mm (GT2 standard) |
| Material | Aluminum alloy |
| Finish | Natural / silver anodized |
| Hub Retention | Set screw |
| Compatible Belt Width | 6mm or 10mm GT2 belt |
| Quantity per Order | 1 piece |
The tooth count determines the pulley's pitch diameter and, combined with your motor's RPM, sets the linear speed of your belt drive. A smaller tooth count (e.g., 28T) on the drive pulley paired with a larger count on the driven pulley reduces speed and increases torque. For most CNC and 3D printer builds, a 20T driver and 40T driven ratio is common, but this listing covers 28–60T for custom ratios. Match the tooth count to your desired gear ratio and available center distance.
Measure your motor shaft diameter with calipers before ordering. Common NEMA 17 stepper shafts are 5mm; NEMA 23 shafts are typically 6.35mm (1/4 in) or 8mm. Servo and DC motor shafts vary widely. Select the bore that matches your shaft diameter exactly — the set screw provides clamping force, but an oversized bore will not grip reliably. If your shaft is between standard sizes, choose the next smaller bore and consult a machinist for light reaming.
These pulleys have a 10mm tooth width and an 11mm belt-contact width, making them compatible with both 6mm-wide and 10mm-wide GT2 / 2GT timing belts. A 6mm belt will run centered in the tooth groove; a 10mm belt fills the groove fully. Do not use belts wider than 10mm, as they will contact the flanges and cause premature wear.
The pulleys are machined from aluminum alloy with a natural or lightly anodized finish. Aluminum forms a passive oxide layer that resists corrosion in typical indoor environments — workshops, labs, and enclosed machine enclosures. Avoid prolonged exposure to salt spray, strong acids, or alkaline solutions. For outdoor or high-humidity environments, consider applying a light coat of dry lubricant or corrosion inhibitor to the bore and set-screw area.
Yes. These pulleys are compatible with both open-ended GT2 belts (cut to length) and closed-loop GT2 belt loops, provided the loop circumference matches the pulley's pitch diameter and center distance. Closed-loop belts are common in 3D printer extruder drives and small robotic joints. Verify the belt loop length against the pulley's pitch circumference (tooth count × 2mm pitch) before purchasing a closed-loop belt.
Slide the pulley onto the shaft so the set-screw hole aligns with a flat on the shaft (if present) or positions the screw over a clean shaft surface. Use an appropriate hex key (typically M3 or M4) to tighten the set screw firmly. For shafts without a flat, tighten the set screw against the round shaft surface and check for slippage under load. For critical applications, apply a small amount of thread-locking compound to the set screw threads before final tightening.
For GT2 pulleys, the pitch diameter is calculated as: Pitch Diameter = (Tooth Count × Pitch) ÷ π. For example, a 40-tooth GT2 pulley has a pitch diameter of (40 × 2mm) ÷ π ≈ 25.46mm. Use this value when calculating center distances and belt lengths for your drive system. Refer to a GT2 belt drive calculator for precise center-distance and belt-length computations.
