XL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D Printer
XL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D Printer
XL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D Printer
XL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D Printer
XL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D Printer
XL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D Printer
XL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D Printer
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XL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D PrinterXL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D PrinterXL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D PrinterXL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D PrinterXL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D PrinterXL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D PrinterXL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D Printer

XL Timing Belt Pulley BF-Type Pitch 5.08mm 10T 11T 12T - 80T For CNC, 3D Printer

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Price:
$2.98 USD
Stock:
In stock (500 units), ready to be shipped

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Description

XL Timing Belt Pulley BF-Type — Precision 5.08mm Pitch Drive for CNC & 3D Printers

When your CNC router skips steps or your 3D printer loses positional accuracy, the culprit is often a mismatched or worn timing pulley. Engineers, makers, and small-batch manufacturers who demand repeatable motion control need a pulley that holds tight tolerances across every tooth. These XL BF-type timing belt pulleys are machined to the XL (Extra Light) standard with a 5.08 mm (0.200 in) pitch, giving you a direct drop-in solution for standard XL belt drive systems.

Each pulley is machined from aluminum alloy, offering a balance of low rotational inertia and structural rigidity. The BF-type flange configuration keeps the belt tracking reliably on the pulley face. Available tooth counts span from 10T to 80T, with a fixed 10 mm (0.39 in) compatible belt width. Bore diameter and set-screw configuration vary by tooth count — see variant options for exact bore specs.

Typical use cases include XL belt CNC router axis drives, FDM 3D printer X/Y motion systems, desktop laser engraver gantries, and lightweight robotics joint actuators — all applications where an XL timing belt pulley BF-type with 5.08 mm pitch delivers the low-backlash positioning these builds require.

⚙️ Compatible with: Standard XL timing belts (5.08 mm / 0.200 in pitch) — 10 mm belt width. Verify bore diameter against your shaft size before ordering.

✅ Key Features of These XL BF-Type Timing Belt Pulleys

  • 📐XL Standard 5.08 mm Pitch — Conforms to the XL (Extra Light) timing belt profile for direct compatibility with standard XL belts used in CNC and 3D printer drives.
  • 🔩BF-Type Flanged Design — Dual-flange construction keeps the belt centered on the pulley, reducing lateral drift and belt wear in high-cycle motion applications.
  • 🪙Aluminum Alloy Construction — Lightweight yet rigid material reduces rotational inertia for faster acceleration and deceleration in servo and stepper motor systems.
  • 📏Wide Tooth Count Range (10T – 80T) — 51 variants from 10 to 80 teeth let you dial in the exact gear ratio your drive system needs without custom machining.
  • 🎯10 mm Belt Width Compatibility — Matched to standard 10 mm wide XL belts, the most common width in desktop CNC and 3D printer motion platforms.
  • 🔧Set-Screw Shaft Retention — Includes set-screw bore for secure shaft mounting; bore diameter varies by tooth count — see variant options for your specific size.

📐 Technical Specifications — XL Timing Belt Pulley

Belt Profile XL (Extra Light)
Pitch 5.08 mm (0.200 in)
Pulley Type BF-type (flanged)
Tooth Count Range 10T – 80T (see variant options)
Compatible Belt Width 10 mm (0.39 in)
Material Aluminum alloy
Bore Diameter See variant options
Flange Configuration Double flange (BF)
Shaft Retention Set screw
Surface Finish Natural anodized / machined
Package Quantity 1 PCS per order

❓ Frequently Asked Questions

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

The tooth count determines your drive ratio. Divide the driven pulley teeth by the drive pulley teeth to get the ratio. For CNC routers and 3D printers, common drive pulleys are 20T paired with larger idler or driven pulleys. Match the tooth count to your existing belt loop length and axis travel requirements.

What belt profile and pitch does this pulley use?

These pulleys are machined for the XL (Extra Light) belt profile with a 5.08 mm (0.200 in) pitch. They are not compatible with GT2, T5, T10, or other profiles. Always confirm your belt's pitch before ordering.

What belt width is compatible with this pulley?

The pulley flange is designed for 10 mm wide XL timing belts. Using a narrower or wider belt may cause tracking issues or belt edge wear. Confirm your belt width before selecting a variant.

What is the bore diameter, and can I use it on my motor shaft?

Bore diameter varies by tooth count. Please check the variant detail or contact us to confirm the bore size for your selected tooth count. The pulley uses a set-screw for shaft retention, which works with standard round shafts. If you need a specific bore size, please reach out before ordering.

Is the aluminum construction strong enough for my CNC router?

Aluminum alloy pulleys are the industry standard for desktop CNC routers, 3D printers, and light-duty automation. They provide sufficient strength for typical belt tension loads in these applications while keeping rotational mass low. For heavy industrial drives with very high belt tension, a steel pulley may be more appropriate.

Will the BF-type flange prevent belt derailment?

Yes. The BF-type double-flange design physically constrains the belt on both sides of the pulley face, preventing lateral drift during operation. This is especially useful on long-travel axes where belt alignment can shift under load.

Can I use this pulley in a 3D printer extruder or direct-drive system?

These pulleys are designed for XL belt drive systems, which are common in Cartesian and CoreXY 3D printer motion platforms. They are not typically used in extruder direct-drive mechanisms, which usually use MK8 or similar hobbed gears. For X/Y axis belt drives using XL belts, these pulleys are a direct fit.

How do I install and secure the pulley on my shaft?

Slide the pulley onto your motor or idler shaft, align it with your belt path, then tighten the set screw against the shaft using an appropriate hex key. For best retention, ensure the shaft surface is clean and consider applying a small amount of thread-locking compound to the set screw if vibration is present in your application.

🛒 Select your tooth count (Number of Gear Teeth) above, then add to cart.

 

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