GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T
GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T
GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T
GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T
GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T
GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T
GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T
GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T
GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T
GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T
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GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60TGT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60TGT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60TGT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60TGT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60TGT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60TGT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60TGT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60TGT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60TGT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T

GT2 6mm Aluminium Timing Belt Smooth Tooth Idler Drive Pulley 30/36/40/48/60T

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Price:
$6.68 USD
Stock:
In stock (500 units), ready to be shipped

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Description

GT2 6mm Aluminum Idler Pulley — Reliable Belt Tensioning for Precision Motion Systems

When your timing belt loses tension mid-print or mid-cut, the results are costly: layer shifts, missed steps, and wasted material. Makers, hobbyists, and small workshop operators running GT2 belt-driven systems need idler pulleys they can count on — parts that hold alignment under load without adding unnecessary friction or backlash.

These GT2 6mm smooth-tooth idler drive pulleys are machined from aluminum alloy, offering a lightweight yet rigid construction. Available in tooth counts of 30, 36, 40, 48, and 60, with bore sizes ranging from 5mm to 12mm (approximately 0.20" to 0.47"), they cover the most common shaft diameters used in desktop motion systems. The smooth (toothless) contact surface is designed specifically for idler and tensioner roles where the belt back-face rides the pulley.

Typical use cases include GT2 belt tensioning on FDM 3D printers (CoreXY, Cartesian, and delta architectures), CNC router and laser engraver belt drives, and lightweight robotic arm or linear actuator assemblies. Long-tail applications include DIY belt-driven camera sliders, automated conveyor prototypes, and educational robotics kits requiring reliable GT2 idler pulley replacements.

⚙️ Compatible with GT2 6mm wide timing belts. Verify bore size matches your shaft diameter before ordering. Tooth count affects wrap angle and tensioner geometry — select accordingly.

✅ Key Features of These GT2 6mm Aluminum Idler Pulleys

🔩 Aluminum Alloy Construction

Machined from aluminum alloy for a balance of low weight and structural rigidity — ideal for high-cycle motion applications where mass matters.

🎯 Smooth Tooth Idler Profile

The toothless outer surface allows the belt back-face to ride cleanly, minimizing wear and noise in tensioner and idler positions within GT2 drive systems.

📐 Wide Size Selection

Choose from 30T, 36T, 40T, 48T, or 60T tooth counts paired with bore sizes from 5mm to 12mm — covering the most common shaft diameters in desktop CNC and 3D printer builds.

📦 Flexible Pack Quantities

Available in packs of 1, 5, or 15 — order a single replacement or stock up for a full machine build or workshop inventory at a lower per-unit cost.

⚡ Drop-In Replacement Geometry

Standard GT2 6mm belt width and bore dimensions make these a straightforward swap for worn or undersized idler pulleys in existing motion systems.

🛠️ Broad Application Compatibility

Suited for FDM 3D printers, desktop CNC routers, laser engravers, robotic arms, and DIY linear motion projects using GT2 6mm belt drive configurations.

📐 Technical Specifications — GT2 Idler Timing Pulley

Belt Type GT2
Belt Width 6mm
Tooth Count 30T / 36T / 40T / 48T / 60T (see variant options)
Bore Diameter 5mm / 6mm / 6.35mm / 7mm / 8mm / 10mm / 12mm (see variant options)
Material Aluminum Alloy
Pulley Type Smooth Tooth Idler / Drive Pulley
Outer Diameter See variant options
Flange See variant options
Pack Quantity 1 / 5 / 15 (see variant options)
Finish Natural aluminum

❓ Frequently Asked Questions

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

Tooth count affects the pulley's outer diameter and the belt wrap angle at the idler position. For tight spaces or small tensioner arms, a lower tooth count (30T or 36T) gives a smaller diameter. For longer belt runs or where more wrap angle is needed, 48T or 60T is common. Match the tooth count to your frame geometry and belt path design.

Which bore size should I select?

Measure your idler shaft or bearing outer diameter precisely before ordering. Available bore sizes include 5mm, 6mm, 6.35mm (1/4"), 7mm, 8mm, 10mm, and 12mm. A bore that is too large will cause runout and belt tracking issues; too small will not fit. If you are mounting on a bearing, match the bore to the bearing's outer diameter.

Are these pulleys compatible with GT2 open-loop and closed-loop belts?

Yes. These smooth-tooth idler pulleys are compatible with standard GT2 6mm wide timing belts in both open-loop (cut-to-length) and closed-loop configurations. The smooth surface contacts the flat back of the belt, making them suitable for tensioner and redirector roles — not for driving the belt directly via tooth engagement.

How strong are aluminum pulleys compared to plastic ones?

Aluminum alloy pulleys offer significantly higher rigidity and dimensional stability than injection-molded plastic alternatives. They resist deformation under belt tension, maintain concentricity over time, and handle higher operating temperatures — making them a reliable choice for machines that run extended print or cutting sessions.

Will these pulleys corrode or oxidize over time?

Aluminum naturally forms a thin oxide layer that acts as a passive corrosion barrier in typical indoor workshop environments. For applications exposed to moisture, coolant mist, or humidity, the natural finish provides reasonable protection. If operating in harsh environments, consider applying a light coating of dry lubricant to the bore and shaft interface.

Why buy a pack of 5 or 15 instead of a single pulley?

Multi-packs offer a lower per-unit cost and ensure you have spares on hand for future builds or replacements. If you are building a CoreXY or similar multi-idler printer, you will typically need 4–8 idler pulleys per machine. Packs of 5 or 15 are also popular for workshop stock, educational lab kits, and batch machine builds.

Can I use these as drive pulleys (with motor shaft) instead of idlers?

These are smooth-tooth (toothless) pulleys designed for idler and tensioner use — the belt rides on the smooth outer surface rather than engaging teeth. For motor-driven positions where the pulley must positively grip and advance the belt, you need a toothed GT2 drive pulley with matching tooth profile. Contact us if you need toothed drive pulleys for your build.

🛒 Select your tooth count, bore size, and pack quantity above, then add to cart.

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