XL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mm
XL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mm
XL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mm
XL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mm
XL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mm
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XL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mmXL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mmXL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mmXL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mmXL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mm

XL 14T-120T Timing Belt Pulley Pitch 5.08mm With Step/Keyway Pulleys Width 11mm

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Price:
$7.18 USD
Stock:
In stock (500 units), ready to be shipped

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Description

XL Timing Belt Pulley 5.08mm Pitch — Precision Step/Keyway Drive for Robotics & Automation

When your motion system demands repeatable, slip-free power transfer, a mismatched or undersized pulley becomes the weakest link in the chain. Engineers and makers building CNC routers, 3D printers, robotic arms, and conveyor systems need XL timing belt pulleys that hold tight tolerances across the full bore and tooth range — without compromise. These XL timing belt pulleys with 5.08mm pitch are engineered for exactly that application.

Each pulley is machined from aluminum alloy, featuring a stepped hub with a precision-cut keyway for positive shaft engagement. The belt-contact surface spans a fixed 11mm width (approximately 0.43 in), compatible with standard XL-profile timing belts. Tooth counts range from 14T to 120T, with bore options from 8mm to 25mm (approximately 0.31 in to 0.98 in) and keyway dimensions from 3×1.4mm up to 8×3.3mm depending on bore size.

Typical use cases include XL belt drive systems for desktop CNC machines requiring precise axis positioning, stepper and servo motor pulley replacements in 3D printer extruder and gantry assemblies, and light-duty conveyor or indexing table drives in small-batch automation setups where synchronous motion is critical.

⚙️ Compatibility: Designed for standard XL-profile (5.08mm pitch) timing belts, 11mm belt width. Verify bore diameter and keyway dimensions against your shaft specifications before ordering.

✅ Key Features of These XL Timing Belt Pulleys

🔩 Stepped Hub with Keyway

Precision-machined step hub and keyway slot ensure positive, non-slip shaft engagement under dynamic loads.

📐 XL Profile, 5.08mm Pitch

Standard XL tooth profile mates reliably with XL timing belts for synchronous, backlash-controlled motion.

🎯 Wide Tooth Range: 14T–120T

Broad selection from 14 to 120 teeth lets you dial in the exact gear ratio your drive system requires.

🔧 Multiple Bore Options

Available in bore diameters from 8mm to 25mm to fit a wide range of motor and shaft sizes without adapters.

🏗️ Aluminum Alloy Construction

Lightweight yet rigid aluminum body keeps rotational inertia low while maintaining dimensional stability.

📏 11mm Belt Width, Consistent Flange

Fixed 11mm (≈0.43 in) belt-contact width with flanged edges keeps the belt tracking true under load.

📐 Technical Specifications — XL Timing Belt Pulley

Belt Profile XL (Extra Light)
Pitch 5.08mm (0.200 in)
Belt Width 11mm (approx. 0.43 in)
Number of Teeth 14T – 120T (see variant options)
Bore Diameter 8mm – 25mm (see variant options)
Keyway Dimensions 3×1.4mm / 4×1.8mm / 5×2.3mm / 6×2.8mm / 8×3.3mm (see variant options)
Hub Style Stepped hub with keyway
Material Aluminum alloy
Quantity per Order 1 piece
Weight See variant options

❓ Frequently Asked Questions

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

The tooth count determines your drive ratio. Divide the driven pulley teeth by the driver pulley teeth to get the ratio. For example, a 20T driver paired with a 40T driven pulley gives a 2:1 reduction. Select tooth counts that achieve your target speed or torque ratio while keeping belt tension within the belt manufacturer's recommended range.

Which bore size should I select for my motor shaft?

Measure your motor or drive shaft diameter precisely with calipers. Choose the bore option that matches your shaft diameter exactly — available sizes range from 8mm to 25mm. The keyway dimensions are matched to each bore size per standard key fits, so verify the keyway width and depth against your shaft's key slot before ordering.

What keyway size comes with each bore option?

Keyway dimensions scale with bore size: 8mm bore uses a 3×1.4mm keyway; 10–12mm bores use 3×1.4mm or 4×1.8mm; 14–16mm bores use 5×2.3mm; 18–20mm bores use 6×2.8mm; and 25mm bore uses an 8×3.3mm keyway. The exact keyway for each variant is listed in the Keyway & Amount option selector.

Are these pulleys compatible with standard XL timing belts?

Yes. These pulleys are machined to the standard XL tooth profile with a 5.08mm (0.200 in) pitch, which mates with any standard XL-profile timing belt. Ensure your belt width is 11mm or narrower to fit within the flanged belt-contact surface of these pulleys.

How strong are aluminum timing belt pulleys for my load?

Aluminum alloy pulleys are well-suited for light-to-medium duty synchronous drives typical in CNC, 3D printing, and small automation equipment. For heavy industrial loads or high-shock environments, verify that the pulley's tooth shear strength and bore fit meet your application's torque requirements. The keyway provides positive drive engagement that significantly increases torque capacity compared to friction-only set-screw mounting.

Do these pulleys require any surface treatment for corrosion resistance?

The aluminum alloy body provides inherent oxidation resistance suitable for indoor, dry environments. For applications exposed to moisture, mild chemicals, or outdoor conditions, consider applying a light coat of corrosion-inhibiting lubricant or anodizing the pulley surface. Keep the bore and keyway surfaces lightly oiled to prevent fretting corrosion at the shaft interface.

Can I use these pulleys with a set screw instead of a key?

These pulleys are designed with a keyway for keyed shaft connections. The keyway provides superior torque transmission and is the recommended mounting method. If your shaft does not have a keyway, consult a machinist to cut a matching key slot, or consider a pulley with a clamp-style hub instead.

🛒 Select your Number of Teeth, Bore, and Keyway size above, then add to cart.

 

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