GT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mm
GT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mm
GT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mm
GT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mm
GT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mm
GT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mm
GT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mm
GT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mm
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GT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mmGT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mmGT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mmGT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mmGT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mmGT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mmGT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mmGT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mm

GT2 6/10mm Timing Belt Smooth Tooth Idler Drive Pulley 16-50Tooth Bore 4mm-14mm

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$5.00 USD
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In stock (500 units), ready to be shipped

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Description

GT2 Smooth Tooth Idler Drive Pulley — Precise Belt Routing for Motion Control Builds

When your 3D printer, CNC router, or robotics project demands slip-free belt routing, a mismatched or low-friction idler pulley becomes the weakest link in your motion system. These GT2 smooth tooth idler drive pulleys are engineered for makers, engineers, and workshop builders who need reliable belt tensioning and redirection without tooth engagement — keeping your GT2 belt running true at every pass.

Each pulley is machined from aluminum alloy with a smooth outer rim designed for GT2 timing belts in either 6mm or 10mm width. Bore sizes range from 4mm to 14mm (approximately 0.16" to 0.55"), and tooth counts span 16T to 50T, giving you precise pitch diameter control for your specific drive geometry. Two flange styles are available: K-Type (single or no flange) and BF-Type (dual flange) to suit open or enclosed belt paths.

Typical applications include idler tensioner assemblies on CoreXY and Cartesian 3D printers, belt-driven axis systems on desktop CNC machines, and lightweight robotic arm linkages where smooth belt redirection is critical. Long-tail use cases include GT2 6mm idler pulley for Ender 3, 10mm belt idler for Voron builds, and aluminum timing pulley tensioner for CNC router.

✅ Compatible with GT2 timing belts in 6mm and 10mm widths. Verify bore diameter and belt width before ordering.

✅ Key Features of These GT2 Idler Drive Pulleys

  • ⚙️ Smooth Tooth Profile — Flat outer rim engages GT2 belt surface without tooth meshing, ideal for idler and tensioner roles in belt-driven motion systems.
  • 🔩 Wide Bore Range — Available in bore diameters from 4mm to 14mm (0.16"–0.55"), accommodating standard shaft sizes used in 3D printers, CNC, and robotics.
  • 📐 Two Flange Styles — K-Type for open belt paths; BF-Type with dual flanges for enclosed or guided belt channels that require lateral belt containment.
  • 🎯 16T to 50T Selection — Wide tooth count range lets you dial in the exact pitch diameter needed for your drive geometry and belt wrap angle.
  • 🔧 6mm & 10mm Belt Width Support — Each variant specifies both bore and belt width so you can match your existing belt spec without guesswork.
  • 🏗️ Aluminum Alloy Construction — Lightweight yet rigid material keeps rotating mass low while maintaining dimensional stability under continuous belt tension.

📐 Technical Specifications — GT2 Idler Drive Pulley

Belt Type GT2 (2mm pitch)
Belt Width 6mm or 10mm (see variant options)
Tooth Count 16T, 20T, 24T, 25T, 26T, 28T, 30T, 32T, 35T, 36T, 38T, 40T, 42T, 45T, 48T, 50T
Bore Diameter 4mm, 5mm, 6mm, 6.35mm, 7mm, 8mm, 10mm, 12mm, 12.7mm, 14mm (see variant options)
Flange Style K-Type / BF-Type (see variant options)
Material Aluminum alloy
Tooth Profile Smooth (non-toothed rim, idler/tensioner use)
Outer Diameter See variant options
Hub Width See variant options

❓ Frequently Asked Questions

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

K-Type pulleys typically have a single flange or no flange on one side, making them suitable for open belt paths where the belt exits laterally. BF-Type pulleys feature dual flanges on both sides of the rim, which contain the belt laterally and prevent it from walking off the pulley — ideal for enclosed or guided belt channels.

Are these pulleys toothed or smooth?

These are smooth tooth idler pulleys — the outer rim is flat and does not have GT2 tooth profiles. They are designed for idler and tensioner roles where the belt slides over the pulley surface rather than meshing with teeth. Do not use these as drive pulleys connected to a motor shaft.

How do I choose the correct bore size?

Measure the outer diameter of the shaft or bearing you plan to mount the pulley on. Select the bore size that matches your shaft diameter. Common sizes for 3D printers include 5mm (for standard bearings like 625ZZ) and 3mm (not listed — check your printer's BOM). For CNC and robotics, 6mm, 8mm, and 10mm bores are frequently used with standard metric shafting.

Which belt width should I choose — 6mm or 10mm?

Match the belt width to your existing GT2 belt. Most desktop 3D printers (Ender 3, Prusa, Voron 0) use 6mm GT2 belts. Larger-format machines, CoreXY builds with higher belt tension, and CNC routers often use 10mm GT2 belts for increased load capacity. The pulley's teeth width must match your belt width.

Can I use these pulleys as drive pulleys on a stepper motor?

No. These are smooth idler pulleys intended for belt tensioning and redirection only. For motor-driven pulleys, you need a toothed GT2 drive pulley with a set screw or keyway to lock onto the motor shaft. Using a smooth idler as a drive pulley will cause belt slippage and loss of motion accuracy.

What tooth count should I select for my build?

Tooth count determines the pitch diameter of the pulley, which affects belt wrap angle and the effective radius at the idler point. For most 3D printer tensioner applications, 20T is a common choice. Larger tooth counts (30T–50T) are used when you need a larger wrap angle or a specific geometric constraint in your belt path. Consult your machine's design files or BOM for the recommended idler tooth count.

Are these compatible with open-loop belt systems?

Yes. GT2 smooth idler pulleys are widely used in open-loop belt systems for 3D printers and CNC machines. They redirect and tension the belt without affecting the drive ratio. For closed-loop systems, ensure the idler placement does not introduce backlash or belt stretch that could affect encoder feedback accuracy.

🛒 Select your Type, Teeth count, and Bore & Teeth Width above, then add to cart.

 

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