













⚙️ Roll with the best — precision that keeps you ahead!
This set includes 200 high-precision 5.5mm steel bearing balls made from heat-treated alloy steel, coated with grease for superior lubrication and corrosion resistance. Designed to reduce friction in various mechanical applications, these durable balls come neatly packed in a plastic case, making them perfect for professionals and enthusiasts seeking reliable, long-lasting performance.












| ASIN | B078T81JK3 |
| Bearing Number | 200 |
| Bearing Type | Ball Bearing |
| Best Sellers Rank | #4,876 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Precision Balls #128 in Deep-Groove Ball Bearings |
| Brand | DEEPDREAM |
| Compatible Lubricant | Grease |
| Date First Available | October 24, 2022 |
| Item Thickness | 5.5 Millimeters |
| Item Weight | 5.3 ounces |
| Item dimensions L x W x H | 1.18 x 1.18 x 1.18 inches |
| Item model number | 1 |
| Manufacturer | DEEPDREAM |
| Material | Alloy Steel |
| Outside Diameter | 5.5 Millimeters |
| Product Dimensions | 1.18 x 1.18 x 1.18 inches |
| Specification Met | Abec 4 |
D**D
Solid and HARD
These a solid. I have not put them on a micrometer as I don’t need them that precise and won’t be measuring them. So if you’re in need of solid bearing balls this size, these are it. They’re perfect for my needs. Better than perfect. Just by my hardness tests, don't expect to drill into them. They are HARD steel.
M**Z
Perfect !
These 2 1/2” bearings arrived well packaged and in pristine condition. I’m using them as Chinese hand exercise ‘Baoding’ balls, and for that purpose they’re as good as I could ever hope for. 5 Stars for sure ! ***Update: I’ve since also purchased pairs of the 3” and the 1 3/4” to be used as Baoding balls, and all are absolutely perfect. Highly recommended!
C**C
Heavy, Useful Steel Balls With Many Applications
I bought these 1.5" (38mm) steel balls to clear clogs in my shop vac hose. Every week I vacuum a chicken coop with wood shavings, and waste clumps sometimes block the hose. These balls are the perfect size and heavy enough to roll through the hose and break up the clog. Even if you don’t have chickens, you might still enjoy them. They’re solid, satisfying to hold, and could be useful for many projects. The finish is polished steel (not chrome), so they may rust over time, but they can be kept in good shape with a little care.
U**L
To spec and unblemished.
2000 bright and shiny little mirrored balls all the same.
T**D
Great
Worked great for j bolt hinges that are usually missing these when you get them.
W**E
Watch ordering your size
A little bit big for intended use (sling shot ammo) but quality manufactured product. No spree perfectly round.
J**F
Heavy duty
Very heavy set of Balls 😀
J**U
Perfect for monkey fists
Exactly what I expected. Good quality
S**O
No hay mucho que decir. Son exactamente como se describen
F**A
Excelente producto lo estoy usando para un proyecto
R**S
Gracias es un producto bueno.
G**.
Es mentira que no se oxidan . Las use en proyecto de carpintería y se oxidaron unos días después de introducirlas en la artesanía , por ende me arruinó el proyecto u me hizo perder mucho dinero y tiempo
Trustpilot
1 week ago
5 days ago