MXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mm
MXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mm
MXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mm
MXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mm
MXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mm
MXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mm
MXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mm
MXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mm
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MXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mmMXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mmMXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mmMXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mmMXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mmMXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mmMXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mmMXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mm

MXL 20-80T Timing Belt Pulley Pitch 2.032mm AF-type Synchronous Wheel Width 11mm

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$3.84 USD
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In stock (500 units), ready to be shipped

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Description

MXL Timing Belt Pulley AF-type — Precise 2.032mm Pitch for Reliable DIY Automation

When your CNC router, 3D printer, or linear motion system demands slip-free synchronous drive, choosing the wrong pulley means lost steps, misalignment, and costly reprints or ruined cuts. Makers, robotics hobbyists, and small workshop engineers who need a dependable MXL timing belt pulley with a wide bore selection will find this AF-type wheel a straightforward drop-in solution.

These MXL timing belt pulleys feature the standard 2.032mm (0.080 in) pitch profile machined to MXL specification. The belt-contact width is 11mm (approx. 0.43 in), and bore options span 3mm to 15mm (0.12–0.59 in) to suit common motor shaft sizes. Tooth counts range from 20T to 80T, giving pitch diameters from approximately 12.9mm (0.51 in) for 20T up to approximately 51.6mm (2.03 in) for 80T. The AF-type designation indicates a flanged hub with a radial set-screw for secure shaft locking without keyways.

Typical use cases include CNC router X/Y axis drives requiring low-backlash MXL belt pulley sets, 3D printer extruder and motion systems using 2.032mm pitch synchronous wheels, and compact robotic arm joints or pick-and-place mechanisms where a flanged timing pulley with set screw keeps the belt tracking true under repeated cycling.

⚙️ Compatibility: Designed for standard MXL open-end and closed-loop timing belts with 2.032mm (0.080 in) pitch and belt widths up to 11mm. Verify your motor shaft diameter matches the selected bore before ordering.

✅ Key Features of These MXL AF-type Timing Belt Pulleys

📐
Standard MXL 2.032mm Pitch

Machined to MXL profile specification for accurate mesh with MXL timing belts, minimizing backlash in motion control applications.

🔩
AF-type Flanged Hub with Set Screw

Integrated flanges keep the belt tracking on the pulley face; a radial set screw locks the pulley firmly to the shaft without requiring a keyway.

📏
Wide Tooth Count Range: 20T–80T

Nineteen tooth-count options let you dial in the exact gear ratio needed for your drive system, from compact 20T sprockets to large 80T wheels.

🕳️
Bore Options 3mm–15mm

Eleven bore sizes — including 3, 4, 5, 6, 6.35, 8, 10, 12, 12.7, 14, and 15mm — cover NEMA stepper shafts, servo motors, and common metric/imperial shaft diameters.

📦
11mm Belt Width (C11 Series)

The 11mm belt-contact width suits standard MXL belts in that width class, balancing load capacity with compact pulley dimensions for space-constrained builds.

🔄
Consistent Tooth Profile for Synchronous Drive

The MXL tooth geometry ensures positive engagement with no slippage, making these pulleys suitable for position-critical applications such as CNC axes and extruder drives.

📐 Technical Specifications — MXL AF-type Timing Belt Pulley

Belt Profile MXL (Miniature Extra Light)
Pitch 2.032mm (0.080 in)
Belt Width Compatibility 11mm (C11 series)
Hub Type AF-type (flanged, set-screw locking)
Number of Teeth See variant options (20T – 80T)
Bore Diameter See variant options (3mm – 15mm)
Pitch Diameter See variant options
Flange Integrated double flange
Locking Method Radial set screw
Material See variant options
Finish See variant options
Weight See variant options

❓ Frequently Asked Questions

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

The tooth count determines the pitch diameter and, combined with your mating pulley, sets the drive ratio. For a 1:1 ratio use identical tooth counts on both pulleys. For speed reduction, use a larger tooth count on the driven pulley. Common CNC and 3D printer setups use 20T driver pulleys paired with 20T or 40T driven pulleys. Refer to your belt length and center-distance calculation to confirm the combination fits your frame.

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

NEMA 17 stepper motors typically have a 5mm output shaft. Select the 5mm bore variant for a direct fit. If your motor has a D-shaft (flat-cut), the set screw in the AF-type hub will engage the flat and prevent rotation. For NEMA 23 motors with an 8mm shaft, choose the 8mm bore option.

What does "AF-type" mean and how does the set screw work?

AF-type refers to a flanged pulley hub that uses a radial set screw (grub screw) to clamp onto the motor shaft. You slide the pulley onto the shaft, align it to the desired position, then tighten the set screw with an Allen key. No keyway or press-fit is required, making installation and repositioning straightforward. Ensure the set screw is tightened to the appropriate torque to prevent slipping under load.

Are these pulleys compatible with standard MXL timing belts?

Yes. These pulleys are machined to the MXL tooth profile with a 2.032mm (0.080 in) pitch, which is the industry-standard specification for MXL open-end and closed-loop timing belts. They are compatible with MXL belts up to 11mm wide. Do not use with XL, GT2, or other pitch belts, as the tooth profiles are not interchangeable.

How strong are these pulleys — can they handle continuous duty?

These pulleys are suited for light-to-medium duty synchronous drive applications typical of CNC routers, 3D printers, and small automation equipment. The actual load capacity depends on the tooth count, belt tension, speed, and material. For heavy industrial continuous-duty applications with high torque, consult the belt manufacturer's load tables and verify the pulley material meets your requirements.

Do these pulleys require any special maintenance or lubrication?

MXL timing belt drives are generally dry-running systems — do not apply grease or oil to the belt or pulley teeth, as lubricants attract debris and can cause belt slippage or accelerated wear. Periodically check belt tension and inspect the set screw torque, especially after initial run-in. Re-tighten the set screw if any axial or rotational movement is detected.

How do I calculate the pitch diameter for a given tooth count?

For MXL pulleys, the pitch diameter (PD) is calculated as: PD = (Number of Teeth × Pitch) ÷ π. For example, a 20T pulley: PD = (20 × 2.032) ÷ 3.1416 ≈ 12.94mm. A 40T pulley: PD ≈ 25.87mm. Use this to determine center distance and belt length for your drive layout.

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

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