What's the difference between the seventh and ninth choices in this listing?

The seventh is - 40 teeth/8mm bore, the ninth 60 teeth/8mm bore. The 60 teeth is bigger diameter than 40 teeth.

Can I use this for a Velec electric bike chain?

This is a Timing Belt Idler Pulley made from Aluminum. I did not use it on my project, but used pair of flanged ball bearings for the pulley I need. If your bike chain made from steel metal I wouldn't recommended to use as a pulley for it. Aluminum will be worn out very quick.

What is the flange diameter on these?

Flange diameter is 0.704" Flange thickness is 0.039" Belt Hub diameter is 0.473" Belt Hub width is 0.255"

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3Dman GT2 16Toothless Bore 3mm 20Toothless Bore 5mm Aluminum Timing Belt Idler Pulley/Double Head for 3D Printer 6mm Width Timing Belt 20 Toothless Bore 5mm 20-05-0514-10

Product ID: 332344521

🔩5mm precision bore for perfect fit

⚙️20 toothless design for smooth belt glide

🛠️Lightweight 3g aluminum build

25175CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Elevate your 3D printing game with precision and durability!

PRECISION ENGINEERED FIT - 5mm bore diameter guarantees flawless alignment with your GT2 6mm wide timing belt.
SEAMLESS BELT PERFORMANCE - 20 toothless pulley ensures whisper-quiet, slip-free timing belt operation.
DURABLE ALUMINUM CONSTRUCTION - Lightweight yet robust aluminum material resists wear and heat for long-lasting reliability.
HASSLE FREE QUALITY ASSURANCE - Backed by responsive 24-hour support and a full replacement or refund guarantee for peace of mind.
VERSATILE INDUSTRIAL COMPATIBILITY - Ideal for CNC machines, milling, drilling, and 3D printers—engineered for professional-grade machinery.

The 3Dman GT2 20 toothless aluminum timing belt idler pulley features a 5mm bore and is designed for 6mm wide GT2 timing belts. Weighing just 3g, it offers smooth, silent belt movement and is compatible with various industrial machines including CNC and milling equipment. Crafted from durable aluminum, it ensures long-lasting performance backed by a customer-friendly replacement or refund policy.

Specifications

ASIN	B07RV2T54M
ASIN	B07RV2T54M
Batteries Included?	No
Batteries Required?	No
Color	20 Toothless Bore 5mm
Customer Reviews	4.5 4.5 out of 5 stars (229)
Customer reviews	4.5 4.5 out of 5 stars (229)
Date First Available	11 June 2019
Date First Available	11 June 2019
Item Weight	40 g
Manufacturer	3Dman
Manufacturer	3Dman
Manufacturer reference	20-05-0514-10
Manufacturer reference	20-05-0514-10
Material	Aluminum
Measurement System	Metric
Package Dimensions	11.5 x 8.7 x 0.9 cm; 40 g
Package Dimensions	11.5 x 8.7 x 0.9 cm; 40 g
Part number	20-05-0514-10
Size	20 Toothless Bore 5mm

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25175CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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