S2M 14T-60T Timing Belt Pulley Pitch 2mm With Step Drive Pulleys Teeth Width 7mm

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S2M 14T-60T Timing Belt Pulley Pitch 2mm With Step Drive Pulleys Teeth Width 7mm

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Number of Teeth: S2M14T

Bore: 4mm

Types & Amount: K-type & 1Pcs

Price:

$4.90 USD

Stock:

In stock (500 units), ready to be shipped

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S2M Timing Belt Pulley 2mm Pitch — Precision Drive for Robotics & Automation

When your motion control project demands repeatable, slip-free synchronization, a mismatched or worn pulley becomes the weakest link in the entire drive train. Engineers, makers, and small-batch manufacturers working on CNC machines, 3D printers, robotics arms, and conveyor systems need S2M timing belt pulleys that hold tight tolerances across every cycle. This listing covers the full S2M series from 14 teeth to 60 teeth, giving you a single source for your entire drive system.

Each pulley is machined from aluminum alloy with a natural or anodized finish and features a 2mm pitch S2M tooth profile. The belt contact width is 7mm, matching standard S2M open-end and closed-loop timing belts. Bore options range from 3mm to 25mm (approximately 0.12 in to 0.98 in), and outer diameters scale with tooth count — typically 9mm to 38mm (approximately 0.35 in to 1.50 in). Two hub styles are available: K-type (single-side flange, set-screw hub) and BF-type (double-side flange, set-screw hub).

Typical use cases include desktop CNC router X/Y axis drives, FDM 3D printer extruder and motion systems, lightweight robotic joint actuators, and small-scale automated pick-and-place mechanisms. Long-tail search terms that describe this product: S2M aluminum timing pulley 2mm pitch, 2GT-style step pulley 7mm belt width, synchronous drive pulley for NEMA 17 stepper motor.

⚙️ Compatibility: Designed for S2M (2mm pitch) timing belts with 7mm width. Verify bore diameter matches your shaft before ordering. K-type suits single-flange applications; BF-type provides belt retention on both sides.

✅ Key Features of These S2M Timing Belt Pulleys

🔩2mm Pitch S2M Tooth Profile
Matches standard S2M timing belts for zero-slip synchronous power transmission in precision motion systems.

📐Wide Tooth Count Range (14T–60T)
Select from 28 tooth count options to dial in your exact gear ratio without sourcing from multiple suppliers.

🕳️Multiple Bore Sizes (3–25mm)
Bore options from 3mm to 25mm accommodate NEMA 17 shafts, stepper motor shafts, and custom drive shafts.

🔄K-type & BF-type Hub Styles
K-type offers a single-side flange for compact assemblies; BF-type provides dual flanges to keep the belt tracked on both sides.

⚡Aluminum Alloy Construction
Lightweight yet rigid aluminum body reduces rotational inertia for responsive acceleration in high-cycle automation applications.

🛡️Set-Screw Shaft Retention
Integrated set-screw hub locks the pulley securely to the shaft, preventing axial slip during direction reversals and load spikes.

📐 Technical Specifications — S2M Timing Belt Pulley

Belt Pitch	2mm (S2M)
Belt Width	7mm
Tooth Count Range	14T – 60T
Bore Range	3mm – 25mm (approx. 0.12 in – 0.98 in)
Outer Diameter Range	See variant options
Hub Style	K-type (single flange) / BF-type (double flange)
Material	Aluminum alloy
Shaft Retention	Set screw
Flange Included	Yes (K-type: 1 flange; BF-type: 2 flanges)
Quantity per Order	1 piece

❓ Frequently Asked Questions

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

The tooth count determines the pulley's pitch diameter and, combined with your motor shaft speed, sets the linear belt speed or output RPM. Divide your desired output speed by your motor speed to get the drive ratio, then select tooth counts that match that ratio. For example, a 20T drive pulley paired with a 40T driven pulley gives a 2:1 reduction. Use the Number of Teeth option above to select your required size.

What is the difference between K-type and BF-type pulleys?

K-type pulleys have a single flange on one side of the belt groove. They are compact and work well when the belt is guided by the opposing pulley's flange or a fixed guide. BF-type pulleys have flanges on both sides, which keeps the belt centered and prevents it from walking off the pulley — recommended for vertical belt runs or applications with side loads.

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

Standard NEMA 17 stepper motors have a 5mm output shaft diameter. Select the 5mm bore option. If your motor has a D-cut shaft, the set screw will engage the flat to prevent rotation. For motors with a 1/4-inch (6.35mm) shaft, select the 6.35mm bore option.

Are these pulleys compatible with GT2 timing belts?

S2M and GT2 both use a 2mm pitch, but the tooth profile geometry differs slightly. S2M uses a trapezoidal tooth form while GT2 uses a curvilinear profile. In many low-load 3D printer and light CNC applications they are interchangeable, but for precision or high-load applications it is recommended to match the belt and pulley profile exactly. Confirm your belt specification before ordering.

How strong is the set-screw retention — will it slip under load?

The set screw provides adequate retention for typical light-to-medium duty automation loads when properly torqued against the shaft flat or surface. For high-torque or shock-load applications, use a shaft with a milled flat to give the set screw a positive engagement surface. Applying a small amount of thread-locking compound to the set screw is also recommended for vibration-prone environments.

What belt width do these pulleys accept?

These pulleys are designed for 7mm wide S2M timing belts. Using a narrower belt may cause tracking issues; a wider belt will not seat correctly in the groove. Always match the belt width to the pulley's groove width specification.

Can I use these pulleys for a 3D printer build?

Yes. S2M pulleys with a 5mm bore are widely used in Cartesian and CoreXY 3D printer motion systems. The 20T tooth count is the most common choice for direct-drive X/Y axis configurations. Select the K-type style for standard open-belt runs and BF-type if you need belt retention on both sides of the pulley.

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