S2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mm
S2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mm
S2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mm
S2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mm
S2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mm
Roll over image to zoom in Click on image to zoom
S2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mmS2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mmS2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mmS2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mmS2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mm

S2M 26T-80T Timing Belt Pulleys Pitch 2mm AF-type With Keyway Pulley Width 7mm

HomeDIYer
No reviews

By HomeDIYer®

Price:
$9.78 USD
Stock:
In stock (500 units), ready to be shipped

Payment & Security

Ach Direct Debit Amazon American Express Apple Pay Bancontact BLIK Diners Club Discover EPS Google Pay iDEAL Wero JCB Maestro Mastercard Multibanco MobilePay PayPal Przelewy24 Shop Pay Twint Union Pay USDC Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Limited Offer — Spend More, Save More
Spend $55+
Save $5
Spend $100+
Save $10
Spend $200+
Save $25
✅ Discount applied automatically at checkout 🚚 Free shipping on orders over $89
HomeDIYer DIY Expert Support

DIY Expert Support

Get fitment advice & recommendations

Mon–Fri  8:30 AM – 8:00 PM
WhatsApp
24-Hour Fast Ship
Arrives in 3–14 Days
Worldwide Shipping
30-Day Returns
1 tree planted with every purchase

Description

S2M Timing Belt Pulleys — Precise 2mm Pitch Drive for DIY Automation

When your CNC router skips steps or your 3D printer loses position mid-print, the culprit is often a mismatched or worn pulley. Makers, workshop builders, and automation engineers who need repeatable, slip-free motion rely on properly spec'd S2M timing belt pulleys to keep every axis locked in sync.

These S2M timing belt pulleys feature a 2mm pitch AF-type profile machined from aluminum alloy, with a 7mm belt-contact width (pulley width 7mm). Bore options range from 8mm to 15mm (approx. 0.31"–0.59"), and tooth counts span 26T through 80T, giving you a pitch diameter range of approximately 16.6mm–50.9mm (0.65"–2.00"). Each pulley ships with a pre-cut keyway and set-screw flange for secure shaft locking.

Typical use cases include DIY CNC router X/Y axis drives using S2M 2mm pitch timing belt pulleys, desktop 3D printer extruder and motion systems requiring low-backlash S2M pulley replacements, and compact automation conveyor or indexing table builds where a keyed timing pulley with 2mm pitch ensures accurate positioning.

⚙️ Compatible with S2M (2mm pitch) synchronous timing belts, 6mm belt width. Verify bore diameter and keyway dimensions against your shaft before ordering.

✅ Key Features of These S2M Timing Belt Pulleys

🔩 AF-Type Keyway Design — Pre-machined keyway slot (3×1.4mm, 4×1.8mm, or 5×2.3mm depending on variant) locks the pulley firmly to the shaft, eliminating rotational slip under load.
📐 Wide Tooth Count Range (26T–80T) — Fifteen tooth-count options let you dial in the exact gear ratio for your drive system without custom machining.
🎯 2mm Pitch S2M Profile — The S2M synchronous tooth profile delivers low-backlash, positive engagement with standard S2M belts, critical for accurate positioning in CNC and 3D printing applications.
🔧 Multiple Bore Sizes (8–15mm) — Six bore options (8mm, 10mm, 12mm, 12.7mm, 14mm, 15mm) cover the most common motor and shaft diameters used in DIY automation builds.
⚖️ Aluminum Alloy Construction — Lightweight yet rigid aluminum body keeps rotational inertia low, improving acceleration response in servo and stepper motor systems.
📦 Ready-to-Install, 1 Piece per Order — Each variant ships as a single finished pulley with keyway and set-screw hole, ready to mount directly onto your shaft.

📐 Technical Specifications — S2M Timing Belt Pulley

Belt Profile S2M (Synchronous, 2mm Pitch)
Pitch 2mm
Pulley Type AF-Type (Flanged, with Keyway)
Pulley Width 7mm
Belt Width Compatibility 6mm
Number of Teeth 26T, 30T, 32T, 34T, 35T, 36T, 38T, 40T, 45T, 48T, 50T, 55T, 60T, 70T, 80T
Bore Diameter 8mm, 10mm, 12mm, 12.7mm, 14mm, 15mm
Keyway Dimensions 3×1.4mm / 4×1.8mm / 5×2.3mm (see variant options)
Material Aluminum Alloy
Pitch Diameter Range Approx. 16.6mm–50.9mm (varies by tooth count)
Quantity per Order 1 Piece
Finish See variant options

❓ Frequently Asked Questions

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

The tooth count determines the pitch diameter and, combined with your motor pulley, sets the drive ratio. For most desktop CNC and 3D printer builds, 20T–40T on the motor side paired with a matching or larger driven pulley is common. Use the formula: Pitch Diameter = (Teeth × Pitch) ÷ π. Select a tooth count that achieves your target linear speed or torque ratio without exceeding your belt's rated tension.

Which bore size should I select for my stepper motor shaft?

Match the bore to your motor or shaft diameter exactly. Common NEMA 17 stepper motors use a 5mm shaft — note that this listing starts at 8mm bore, so it is suited for larger shafts (NEMA 23 typically uses 6.35mm or 8mm, NEMA 34 uses 12mm or 14mm). Measure your shaft with calipers before ordering. The keyway must also align with your shaft's keyway slot.

What keyway size comes with each variant?

Keyway dimensions are listed in the "Keyway & Amount" variant option. The three available sizes are 3×1.4mm (width × depth), 4×1.8mm, and 5×2.3mm. Smaller bores (8mm, 10mm) typically pair with the 3×1.4mm keyway, mid-range bores (10mm, 12mm) with 4×1.8mm, and larger bores (12.7mm, 14mm, 15mm) with 5×2.3mm. Always verify the keyway matches your shaft's key slot before ordering.

Is this pulley compatible with HTD 2M or GT2 belts?

No. This pulley uses the S2M synchronous tooth profile, which is not interchangeable with HTD 2M or GT2 profiles even though all three have a 2mm pitch. The tooth geometry differs, and mixing profiles causes poor engagement, accelerated wear, and potential belt skipping. Use S2M pulleys exclusively with S2M belts.

How strong is the aluminum pulley under continuous load?

Aluminum alloy pulleys are well-suited for light-to-medium duty automation, CNC routing, and 3D printing where belt tensions are typically under 50–100N. For heavy industrial conveyor or high-torque applications with sustained high belt tension, consider steel pulleys instead. The AF-type keyway and set-screw design provides secure shaft locking for typical DIY and light industrial loads.

Will this pulley corrode or oxidize over time?

Aluminum alloy naturally forms a thin oxide layer that protects against further corrosion in normal indoor environments. For outdoor or high-humidity applications, an anodized or coated variant is recommended. In standard workshop or lab conditions, these pulleys maintain their dimensional accuracy and surface finish over extended use without special treatment.

Can I use this pulley as both the driver and driven pulley in the same system?

Yes. S2M pulleys can be used on both the motor (driver) and load (driven) shaft. Select different tooth counts to achieve your desired speed ratio, or use the same tooth count for a 1:1 drive. Ensure both pulleys are aligned on the same plane and that belt tension is set correctly to avoid tracking issues or premature belt wear.

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

You may also like

Recently viewed