













⚙️ Elevate your mechanics with precision that never quits!
This set includes 200 high-quality 5.5mm steel bearing balls made from heat-treated alloy steel, pre-coated with grease for superior lubrication and corrosion resistance. Designed to reduce friction in various mechanical applications, these ABEC 4 precision balls come neatly packed for easy organization and are perfect for professionals and hobbyists seeking durable, smooth-operating components.












| ASIN | B078T81JK3 |
| Bearing Number | 200 |
| Bearing Type | Ball Bearing |
| Best Sellers Rank | #5,086 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Precision Balls #131 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.
M**.
Great for exercise.
One star off because of the way they were packed. They were packed so they rubbed against each other during the trip and we're slightly scuffed because of it. They put both of them in one bubble bag which makes no sense because they bump into each other inside the bag. I put some metal polish on them and stuck them in a towel like a hammock and polished them like you do with a bowling ball. Fortunately, the scuffs were buffed out. I figured these would work great for a light workout everyday for the shoulders and arms, and they do. These are much more convenient than swinging dumbbells around, and 4 pounds or so, each, is enough for me at 64. It gives you a harder workout than you would initially think. They're great for lateral raises and rotational exercises. You can do anything with 3" steel balls that you can do with dumbbells, but you don't have to deal with the awkward bulk of a dumbbell. Hello it is right there in the palm of your hand. Of course, you're not going to build much mass with 4 lb, but it's good for toning. Its certainly better than sitting on the couch and becoming a potato, or more of a potato than you already are. My wife can use my balls to get a bit of a workout too if she wants. Lol
J**F
Heavy duty
Very heavy set of Balls 😀
T**H
Perfect!
As advertised. Got here fast.
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
2 weeks ago
2 weeks ago