What are the measurements in inches.

According to Amazon: inside diameter and V groove width = 4mm = 0.1575 inch, outside diameter = 13mm = 0.5119 inch, groove deepnes = 1.5mm = 0.05905 inch. I use them to guide curtain cord.

I haven't seen any rust as of yet. The device I built that uses them is in my garage so doesn't get direct water on it, but it does get pretty humid.

Do these pulleys come with the pins?

Pins? No pins, just the pulleys.

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20pcs 1.5mm Deep Metal V Groove Guide Pulley Bearing

Product ID: 20782485

Details

Bearing Number
624
Brand
Chiloskit
Item Weight
10 g
Item dimensions L x W x H
0.51 x 0.51 x
Material
High Carbon

💨Optimized low friction for speed

⚙️High precision carbon steel

🛡️Double metal shielded design

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Description

⚙️ Elevate your micro pulley game with precision and power!

BULK PACK ADVANTAGE - 20-piece set empowers multiple projects or replacements, keeping your micro pulley systems running without interruption.
SHIELDED FOR LONGEVITY - Double metal shields lock in lubricant and block contaminants, extending bearing life and reducing maintenance.
VERSATILE COMPATIBILITY - Perfect fit for 3D printers, small motors, power tools, medical devices, and more—engineered to ABEC tolerance standards.
EFFORTLESS HIGH SPEED ROTATION - Low friction design minimizes energy loss, delivering smooth, quiet operation in demanding applications.
PRECISION ENGINEERED DURABILITY - Premium high carbon steel ensures long-lasting, deformation-resistant performance under heavy loads.

The Chiloskit 20pcs V Deep Groove Ball Bearings Pulley set features 4x13x6mm high carbon steel bearings with double metal shields for enhanced durability and low friction. Engineered to ABEC standards, these mini bearings deliver smooth, quiet, and efficient rotation, ideal for 3D printing, small motors, and precision mechanical systems. The bulk pack ensures you’re always ready to optimize or replace components in your micro pulley projects.

Specifications

ASIN	B012KKTBRU
Bearing Number	624
Bearing Type	Ball Bearing
Best Sellers Rank	#72,461 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #322 in Deep-Groove Ball Bearings
Brand	Chiloskit
Brand Name	Chiloskit
Compatible Lubricant	Grease
Customer Reviews	4.3 out of 5 stars 335 Reviews
Item Dimensions	0.51 x 0.51 x 0.24 inches
Item Thickness	6 millimeters
Item Weight	10 g
Item dimensions L x W x H	0.51 x 0.51 x 0.24 inches
Manufacturer	Preamer
Material	High Carbon Steel
Material Type	High Carbon Steel
Model	V624ZZ
Number of Items	20
Outside Diameter	13 millimeters
Part Number	V624ZZ
UPC	710185353111
Unit Count	20 Count

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¥3247

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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