What size is the bolt hole?

5/16” threaded bolt with a lock washer has worked very well for me.

What size is the bolt hole?

It's a 608 bearing, so the inner diameter is 8mm. http://www.gizmology.net/bearings.htm (It mounts on an M4 bolt)

I would like to know the weight that these pulleys support

I don't know. I used them for my son's robotics team

Is there a load capacity on these if you are using them as a pulley?

There probably is, the Plastic outer would be the limiting factor as excessive weight would make the cable or rope cut into the plastic.

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5PCS U-Groove Pulley Roller Wheels with Deep Groove Ball Bearings, 8x30x10mm Silent Nylon Guide Track Rollers for Sliding Doors, Windows, and Gym Cable Systems, Heavy Duty & Smooth Motion

5PCS U-Groove Pulley Roller Wheels with Deep Groove Ball Bearings, 8x30x10mm Silent Nylon Guide Track Rollers for Sliding Doors, Windows, and Gym Cable Systems, Heavy Duty & Smooth Motion

Product ID: 21893184

Details

Bearing Number
608ZZ
Brand
Preamer
Item Weight
1.12 ounces
Item dimensions L x W x H
1.18 x 1.18 x
Material
POM Steel

🔇Silent, whisper-quiet glide

⚙️8x30x10mm precision size

🛡️Dual-shielded bearings for durability

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Description

🛠️ Glide into seamless motion — upgrade your sliding game now!

HEAVY DUTY LOAD CAPACITY - Supports up to 200 lbs, ensuring stability and strength for demanding applications.
VERSATILITY MEETS PERFORMANCE - Perfect for sliding doors, windows, gym cables, and DIY projects—adaptable to your dynamic lifestyle.
ENGINEERED FOR EFFORTLESS GLIDE - Experience ultra-smooth, noise-free sliding with advanced low-friction nylon rollers.
MAINTENANCE FREE SHIELDED BEARINGS - Dual-sided shields lock in lubricant and keep out dust, minimizing upkeep and maximizing efficiency.
BUILT TO LAST WITH PREMIUM MATERIALS - High-grade nylon and steel core bearings resist wear and rust for years of reliable use.

The Preamer 5PCS U-Groove Pulley Roller Wheels feature precision 8x30x10mm dimensions with deep groove ball bearings, crafted from durable nylon and steel for silent, smooth operation. Designed for heavy-duty use with a 200 lbs max load, these dual-shielded rollers minimize maintenance and excel in versatile applications from sliding doors to gym cable systems, backed by a 3-year warranty.

Specifications

ASIN	B014884ZYG
Bearing Number	608ZZ
Bearing Type	Roller Bearing
Best Sellers Rank	#137,585 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #753 in Deep-Groove Ball Bearings
Brand	Preamer
Brand Name	Preamer
Compatible Lubricant	Grease
Customer Reviews	4.4 out of 5 stars 152 Reviews
Item Dimensions	1.18 x 1.18 x 0.39 inches
Item Thickness	10 millimeters
Item Weight	1.12 ounces
Item dimensions L x W x H	1.18 x 1.18 x 0.39 inches
Manufacturer	Preamer
Material	POM, Steel
Material Type	POM,Steel
Model	HU-0830-10
Number of Items	5
Number of Packs	5
Outside Diameter	30 millimeters
Part Number	8186738
Specification Met	ABEC 1
UPC	711301729988 740690520654
Unit Count	5 Count
Warranty Description	3 Years

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3058 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

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TrustScore 4.5 | 7,300+ reviews

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