T5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mm
T5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mm
T5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mm
T5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mm
T5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mm
T5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mm
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T5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mmT5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mmT5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mmT5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mmT5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mmT5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mm

T5 20-30T Timing Belt Pulley Pitch 5mm "BF" With Step Drive Pulley Width 11/16mm

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Price:
$6.38 USD
Stock:
In stock (500 units), ready to be shipped

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Description

T5 Timing Belt Pulley with 5mm Pitch BF Step Drive — Precision Motion for CNC and Automation

When your CNC router, 3D printer, or robotics project demands repeatable, slip-free linear motion, a mismatched or worn pulley becomes the weakest link in the entire drive train. Engineers and makers who need consistent tooth engagement and zero-backlash performance rely on T5 timing belt pulleys with a standardized 5mm pitch to keep every axis moving exactly as commanded.

These T5 timing belt pulleys feature a 5mm tooth pitch and a "BF" step-bore design machined from aluminum alloy. Available in 20, 22, 24, 25, and 30 tooth counts, with teeth widths of 11mm (~0.43 in) or 16mm (~0.63 in), and bore diameters ranging from 5mm to 20mm (approximately 0.20–0.79 in). The stepped bore accommodates a set screw for secure shaft retention without additional hardware.

Typical use cases include CNC router X/Y axis drives requiring tight positional accuracy, desktop 3D printer extruder and motion systems using T5 belts, and lightweight robotic arm joints or conveyor mechanisms where a compact, low-backlash T5 timing belt pulley keeps cycle times consistent.

⚙️ Compatibility: Designed for standard T5 timing belts (5mm pitch). Teeth width must match belt width — select 11mm for T5-11 belts or 16mm for T5-16 belts. Bore must match your shaft diameter; confirm shaft size before ordering.

✅ Key Features of These T5 Timing Belt Pulleys

🔩 5mm T5 Pitch

Matches standard T5 timing belts for reliable tooth engagement and consistent drive ratio across all tooth counts.

🎯 BF Step-Bore Design

Stepped bore with set-screw retention locks securely onto motor or drive shafts from 5mm up to 20mm diameter.

📐 Multiple Tooth Counts

Choose from 20, 22, 24, 25, or 30 teeth to dial in the exact drive ratio your motion system requires.

↔️ Dual Belt Width Options

Available in 11mm and 16mm teeth widths to match your T5 belt width and load requirements.

🏗️ Aluminum Alloy Construction

Lightweight yet rigid aluminum body keeps rotational inertia low while withstanding the cyclic loads of continuous drive applications.

🔄 Wide Bore Range

Bore options from 5mm to 20mm (including 6.35mm / 1/4" and 12.7mm / 1/2" imperial sizes) cover stepper motors, servo shafts, and custom drive axles.

📐 Technical Specifications — T5 Timing Belt Pulley

Belt Pitch T5 (5mm)
Number of Teeth 20 / 22 / 24 / 25 / 30 (see variant options)
Teeth Width 11mm (~0.43 in) or 16mm (~0.63 in)
Bore Diameter 5 / 6 / 6.35 / 8 / 10 / 12 / 12.7 / 14 / 15 / 16 / 17 / 18 / 19 / 20mm
Bore Retention Set screw (BF step-bore)
Material Aluminum alloy
Finish See variant options
Outer Diameter See variant options
Hub Length See variant options
Compatible Belt T5 timing belt (5mm pitch)
Quantity 1 piece per order

❓ Frequently Asked Questions

How do I choose the right number of teeth for my application?

The tooth count determines your drive ratio. Divide the driven pulley teeth by the driving pulley teeth to get the ratio. For example, a 20T motor pulley paired with a 40T driven pulley gives a 2:1 reduction. Higher tooth counts on the motor side increase speed; lower tooth counts increase torque. Match your required RPM and torque to select the correct combination.

Which teeth width should I choose — 11mm or 16mm?

The teeth width must match your T5 belt width. Use 11mm pulleys with T5-11 belts and 16mm pulleys with T5-16 belts. Wider belts and pulleys handle higher loads and are less prone to belt tracking issues, making 16mm a better choice for heavier-duty CNC or conveyor applications.

How do I confirm the correct bore size for my motor shaft?

Measure your motor or drive shaft diameter with a caliper before ordering. Common stepper motor shaft sizes are 5mm, 6mm, 6.35mm (1/4"), and 8mm. Servo motors often use 8mm, 10mm, or 12mm shafts. The bore must match the shaft diameter exactly — a loose fit will cause slippage even with the set screw tightened.

What is the "BF" step-bore design and how does it work?

"BF" refers to a stepped bore with a flat (set-screw) retention method. The bore is machined with a flat section on the inner wall, and a set screw presses against the shaft flat or directly onto a round shaft to lock the pulley in place. This eliminates the need for a keyway or press fit, making installation and removal straightforward with a standard hex key.

Are these pulleys compatible with GT2 or HTD belts?

No. These pulleys are designed exclusively for T5 timing belts with a 5mm pitch tooth profile. T5, GT2, and HTD belts have different tooth geometries and are not interchangeable. Using a mismatched belt and pulley will result in poor engagement, accelerated wear, and potential belt skipping under load.

How strong are aluminum timing belt pulleys for CNC use?

Aluminum alloy pulleys are well-suited for the belt tension and cyclic loads typical of CNC routers, 3D printers, and light robotic systems. For most T5 belt applications — where belt tension rather than pulley strength is the limiting factor — aluminum provides an excellent strength-to-weight ratio. For very high-load industrial conveyors, consider steel pulleys instead.

Do these pulleys require any special tools for installation?

No special tools are required. Slide the pulley onto the shaft, align it with your belt path, and tighten the set screw with a standard hex (Allen) key. Ensure the shaft has a flat ground onto it for best grip, or apply a small amount of thread-locking compound to the set screw for added security in high-vibration environments.

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

 

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