S2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mm
S2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mm
S2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mm
S2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mm
S2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mm
S2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mm
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S2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mmS2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mmS2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mmS2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mmS2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mmS2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mm

S2M 90-120T Timing Belt Pulley Pitch 2mm With Keyway CNC Drive Pulley Width 11mm

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Price:
$41.60 USD
Stock:
In stock (500 units), ready to be shipped

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Description

S2M Timing Belt Pulley 90–120T — Precision CNC Drive Pulley with Keyway, 2mm Pitch

When your CNC router, 3D printer, or automation system demands repeatable, slip-free motion, a loose or mismatched pulley is the first thing that kills accuracy. These S2M timing belt pulleys are engineered for makers, small-workshop builders, and automation integrators who need a reliable, keyed drive component that locks firmly to the shaft and stays there.

Each pulley is machined from aluminum alloy with a natural silver finish. The S2M profile features a 2mm pitch and an 11mm belt-contact width (C11). Tooth counts span 90T, 100T, 110T, and 120T, with bore options from 8mm to 25mm (approximately 0.31" to 0.98"). Keyway dimensions are matched to bore size — ranging from 3×1.4mm for 8–10mm bores up to 8×3.3mm for 25mm bores — ensuring a positive, torque-transmitting fit.

Typical use cases include CNC axis drives requiring low-backlash S2M belt systems, 3D printer extruder or gantry timing belt pulley replacements, and light-duty industrial conveyor or indexing automation where a keyed S2M drive pulley with a precise bore is required.

⚙️ Compatibility: Designed for S2M (2mm pitch) synchronous timing belts, 10mm belt width. Verify your shaft diameter and keyway spec before ordering.

✅ Key Features of These S2M Timing Belt Pulleys

🔩 Keyed Bore for Positive Drive

Each pulley ships with a machined keyway matched to its bore size (3×1.4mm through 8×3.3mm), eliminating shaft slip under load and ensuring consistent torque transmission.

📐 Four Tooth-Count Options

Choose from 90T, 100T, 110T, or 120T to dial in your exact gear ratio. More teeth = larger pitch diameter = higher linear speed per motor revolution.

🎯 Wide Bore Range: 8–25mm

Bore options from 8mm to 25mm (0.31"–0.98") cover the most common stepper motor, servo, and gearbox output shaft sizes used in DIY and light industrial builds.

⚡ S2M 2mm Pitch Profile

The S2M tooth profile provides smooth, low-noise engagement with standard S2M synchronous belts, suitable for moderate-speed, moderate-torque drive applications.

🏗️ 11mm Belt-Contact Width (C11)

The 11mm flange-to-flange belt width keeps your S2M belt tracking straight without wandering, reducing edge wear and extending belt service life.

🔧 CNC-Ready Aluminum Construction

Machined aluminum alloy body keeps rotating mass low for responsive acceleration in CNC and 3D printer applications while maintaining dimensional accuracy across the tooth profile.

📐 Technical Specifications — S2M Timing Belt Pulley

Belt Profile S2M (Synchronous, 2mm pitch)
Pitch 2mm
Belt Width Compatibility 10mm
Pulley Width (C) 11mm
Number of Teeth 90T / 100T / 110T / 120T (see variant options)
Bore Diameter 8mm / 10mm / 12mm / 12.7mm / 14mm / 15mm / 16mm / 17mm / 18mm / 19mm / 20mm / 25mm
Keyway Dimensions See variant options (3×1.4mm to 8×3.3mm, matched to bore)
Material Aluminum alloy
Finish Natural / silver anodized
Quantity per Order 1 piece
Weight See variant options

❓ Frequently Asked Questions

How do I choose the right number of teeth (90T, 100T, 110T, or 120T)?

The tooth count determines the pitch diameter of the pulley, which directly affects your drive ratio and linear speed. A 90T pulley has a smaller pitch diameter (~57.3mm) and produces less linear belt travel per motor revolution, while a 120T pulley (~76.4mm) produces more. Match your tooth count to the gear ratio your system requires. If you are replacing an existing pulley, match the original tooth count exactly.

What bore size should I select for my motor or shaft?

Measure your shaft diameter with a caliper before ordering. Available bores are 8, 10, 12, 12.7, 14, 15, 16, 17, 18, 19, 20, and 25mm. Select the bore that matches your shaft exactly — a loose bore will cause runout and vibration even with a keyway fitted. The 12.7mm bore is designed for 1/2" imperial shafts.

What keyway dimensions come with each bore size?

Keyway dimensions are matched to bore size per standard DIN 6885 proportions: 8–10mm bore uses a 3×1.4mm keyway; 12–14mm bore uses 4×1.8mm or 5×2.3mm; 15–20mm bore uses 5×2.3mm or 6×2.8mm; 25mm bore uses 8×3.3mm. The exact keyway for your selected variant is shown in the "Keyway & Amount" option. You will need to supply a matching key stock.

Is this pulley compatible with standard S2M timing belts?

Yes. This pulley is designed for S2M synchronous timing belts with a 2mm pitch and 10mm belt width. It will not fit GT2, HTD, or other belt profiles even if the pitch appears similar. Always confirm your belt profile before ordering.

How strong is the aluminum pulley under load?

Aluminum alloy pulleys are well-suited for CNC routers, 3D printers, and light automation drives operating at moderate speeds and torques. For heavy industrial applications with sustained high torque or shock loads, a steel pulley may be more appropriate. The keyed bore significantly increases torque capacity compared to a set-screw-only design.

Will this pulley corrode or oxidize over time?

Aluminum alloy naturally forms a thin oxide layer that provides moderate corrosion resistance in typical indoor workshop and lab environments. For outdoor or high-humidity applications, consider applying a light coating of machine oil to the bore and keyway area. The tooth profile and outer surface are not treated for harsh chemical environments.

Can I use this pulley in a 3D printer or laser cutter?

Yes, provided your machine uses S2M (2mm pitch) belts with 10mm width. Many DIY CNC and laser cutter builds use S2M drives on axis systems. Verify the bore matches your motor shaft and that the 11mm pulley width fits within your belt path clearance before installing.

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

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