Mine are 608zz SG9 are these SG9? better? Worse?

Same so far.. used in roller on vacuum.. been in for a year..

What is the id and od in inches?

ID is 0.312 inches or 5/16 inches or 7.71mm OD is 0.8665 inches or 111/128 inches or 22.01mm

Can you disassemble these and put the balls, ball frame and guards on another just like it? I need it for a motorized bicycle chain tensionser wheel.

I don't know about disassembling without likely severe damage. However, I used parts from an old bicycle derailleur to tense and carry the double length chain for my old Infinity Recumbent Bike. The springs give just enough to allow the chain to move all directions without choking. Stiff strapping was easy to use to mount on frame. Later I used small radiator hose clamps to secure the whole contraption for rough rides. It's held together and still works after 10 years and about 8,000 miles. If you find a toothed wheel that fits your bearings, you could let it ride on a strait shaft and avoid my Rub Goldberg styling.

Where are these made?

There is nothing on the bearing that indicates to me where it was made. The only thing on them other than the 608zz is CQC. I assume that is the company that made them. Without trying to track down a company with CQC initials, based on price, etc. I’d say the odds are they were made in China. Regardless they seem to be of good quality and work just fine in the guides on my band saw.

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BC Precision Shielded Greased Miniature Ball Bearings, 8 Pack

BC Precision Shielded Greased Miniature Ball Bearings, 8 Pack

Product ID: 7308926

Details

Bearing Number
608ZZ
Brand
BC Precision
Item Weight
11.34 g
Item dimensions L x W x H
0.31 x 0.28 x
Material
Alloy Steel

🔩Chrome steel for heavy load durability

⚙️34,000 RPM max speed

🛡️Double shielded for contamination defense

R423

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Description

🛹 Spin Faster, Last Longer — Upgrade Your Ride with BC Precision Bearings!

BUILT TO ENDURE - Crafted from robust chrome steel, these bearings resist deformation under heavy radial loads.
SHIELDED FOR LONGEVITY - Double shields lock in lubricant and keep out dirt, extending bearing life in demanding environments.
PRECISION AT HIGH VELOCITY - Engineered to spin up to 34,000 RPM with smooth, grease-lubricated performance.
TRUSTED BY PROS ENTHUSIASTS - Top-rated with 4.7 stars from 546 reviews, a go-to choice for precision and reliability.
VERSATILE FIT FOR ACTIVE LIFESTYLES - Compact 8x22x7 mm size perfect for skateboards, inline skates, scooters, and more.

The BC Precision Shielded Greased Miniature Ball Bearings (8 pack) are high-performance single-row ball bearings made from durable chrome steel. Featuring double shields to protect lubricant and prevent contamination, they support radial loads with a max speed of 34,000 RPM under grease lubrication. Sized at 8x22x7 mm, these bearings are ideal for skateboards, inline skates, scooters, and other precision applications, delivering reliable, long-lasting performance favored by professionals and enthusiasts alike.

Specifications

ASIN	B00NX23HGQ
Bearing Number	608ZZ
Bearing Type	Ball Bearing
Best Sellers Rank	#242,174 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,530 in Deep-Groove Ball Bearings
Brand	BC Precision
Brand Name	BC Precision
Compatible Lubricant	Grease
Customer Reviews	4.7 out of 5 stars 546 Reviews
Global Trade Identification Number	00692128467638
Item Dimensions	0.31 x 0.28 x 0.87 inches
Item Highlight	Precision Balls for Bearings, Casters, Drawer Slides and Industrial Applications
Item Thickness	7 millimeters
Item Weight	11.34 g
Item dimensions L x W x H	0.31 x 0.28 x 0.87 inches
Manufacturer	BC Precision
Material	Alloy Steel
Material Type	Alloy Steel
Model	8BC608ZZ
Number of Items	8
Outside Diameter	22 millimeters
Part Number	8BC608ZZ
Specification Met	ABEC 1
UPC	692128467638
Unit Count	8 Count

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R423

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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