5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt
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5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt

5M BF-Type Timing Belt Pulley 26T/28T Synchronous Wheel For 15mm/20mm Width Belt

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By HomeDIYer®

Price:
$19.80 USD
Stock:
In stock (500 units), ready to be shipped

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Description

5M BF-Type Timing Belt Pulley — Precision Synchronous Drive for 15mm & 20mm Belts

When your DIY automation project demands slip-free, synchronized power transmission, a mismatched or poorly machined pulley becomes the weakest link in the entire drive system. Makers, small workshop builders, and CNC hobbyists who rely on 5M pitch timing belts need a pulley that holds bore tolerances tightly and seats the belt cleanly — every cycle, every time.

These BF-Type synchronous wheels are machined for the 5M (5 mm pitch) belt profile and are available in 26-tooth and 28-tooth configurations. Bore diameters range from 6 mm (0.24 in) to 20 mm (0.79 in), including both round-bore and keyway-bore options (e.g., 10 mm with 3×1.4 mm key, 12 mm with 4×1.8 mm key, 12 mm with 5×2.3 mm key, and 19–20 mm with 6×2.8 mm key). Compatible belt widths are 15 mm (0.59 in) and 20 mm (0.79 in).

Typical use cases include CNC router X/Y axis drives, 3D printer extruder and gantry systems, conveyor belt automation for small workshop lines, and general-purpose DIY linear motion rigs where a 5M pitch belt is already specified.

⚙️ Compatibility: Designed for 5M pitch (5 mm) timing belts. Select belt width 15 mm or 20 mm to match your belt. Verify bore diameter and keyway dimensions against your shaft before ordering.

✅ Key Features of These 5M BF-Type Timing Belt Pulleys

🔩 BF-Type Flange Design

Dual flanges on both sides of the pulley keep the belt tracking straight and prevent lateral walk-off during high-speed or reversing cycles.

📐 Two Tooth Counts: 26T & 28T

Choose 26 teeth for a slightly smaller pitch diameter and tighter drive ratio, or 28 teeth for a marginally larger diameter and smoother belt wrap — both in the same 5M profile.

🎯 Wide Bore Range (6–20 mm)

Round-bore options from 6 mm to 20 mm cover the most common shaft sizes used in hobby CNC, 3D printers, and light industrial automation builds.

🔑 Keyway-Bore Variants Available

Keyway options (3×1.4 mm, 4×1.8 mm, 5×2.3 mm, 6×2.8 mm) provide positive rotational locking on keyed shafts, eliminating set-screw-only reliance for torque transmission.

📏 Dual Belt-Width Compatibility

Each tooth count is offered for both 15 mm and 20 mm wide belts, so you can match the pulley to your existing belt width without compromise.

🏭 Machined Tooth Profile

The 5M tooth geometry is machined to engage the belt's trapezoidal tooth profile with consistent mesh, reducing backlash and extending belt service life in repetitive-motion applications.

📐 Technical Specifications — 5M Timing Belt Pulley

Belt Profile 5M (5 mm pitch, trapezoidal)
Pulley Type BF-Type (flanged both sides)
Number of Teeth 26T or 28T (see variant options)
Compatible Belt Width 15 mm or 20 mm (see variant options)
Bore Diameter 6 mm – 20 mm (see variant options)
Keyway Options 3×1.4 mm / 4×1.8 mm / 5×2.3 mm / 6×2.8 mm (see variant options)
Material See variant options
Finish / Color See variant options
Weight See variant options

❓ Frequently Asked Questions

How do I choose between 26T and 28T?

The tooth count affects the pitch diameter of the pulley. A 26-tooth pulley has a slightly smaller pitch diameter than a 28-tooth pulley for the same 5M belt pitch. If you are replacing an existing pulley, match the tooth count exactly. If you are designing a new drive, 26T gives a slightly higher reduction ratio when paired with a larger driven pulley, while 28T provides a marginally larger belt wrap angle for smoother engagement.

How do I select the correct bore diameter?

Measure your motor or drive shaft diameter with a caliper. Select the bore option that matches your shaft size. For round-bore variants, the pulley is typically secured with a set screw. For keyway-bore variants, match both the bore diameter and the keyway dimensions (width × depth) to your shaft's key specification.

What is the difference between a round bore and a keyway bore?

A round bore relies on one or two set screws to grip the shaft. A keyway bore includes a machined slot that accepts a key inserted between the shaft and pulley, providing a positive mechanical lock that transmits torque more reliably under reversing loads or high-acceleration cycles. If your shaft has a keyway cut, choose the matching keyway-bore variant.

Will this pulley fit my 15 mm or 20 mm wide belt?

Yes — each variant listing specifies the compatible belt width (15 mm or 20 mm). The flanges are sized to match the corresponding belt width. Do not use a 15 mm pulley with a 20 mm belt or vice versa, as the belt will not seat correctly between the flanges.

Is this pulley compatible with HTD 5M belts?

These pulleys are designed for the 5M trapezoidal (classical) tooth profile. HTD 5M belts use a rounded (curvilinear) tooth profile and are not interchangeable with trapezoidal 5M pulleys. Verify your belt's tooth profile before ordering. If your belt is labeled "5M" with a rounded tooth, it is HTD; if it has a flat-sided trapezoidal tooth, it matches this pulley.

Can I use this pulley in a CNC router or 3D printer?

Yes. 5M BF-Type pulleys are commonly used in CNC router axis drives and 3D printer gantry or extruder systems where a 5M pitch belt is specified. Confirm the tooth count, bore size, and belt width match your machine's existing drive components before installing.

How do I confirm the keyway dimensions are correct for my shaft?

Keyway dimensions are listed in the variant name as bore diameter followed by key width × key depth in parentheses — for example, "12mm(5×2.3mm)" means a 12 mm bore with a 5 mm wide by 2.3 mm deep keyway. Compare these values to the key specification stamped on your shaft or listed in your motor's datasheet. If the dimensions do not match, select a round-bore variant and use a set screw instead.

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

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