

⚙️ Elevate your engineering game with precision that never quits!
The Tanstic 330Pcs Steel Bearing Ball Assortment offers 16 metric sizes ranging from 1mm to 12mm, made from high-hardness, anti-rust alloy steel. Designed for precision and durability, this set reduces friction in bearings, extends machine life, and is ideal for applications from bicycles to industrial equipment. Packaged in a convenient storage box, it’s the ultimate toolkit upgrade for professionals and hobbyists alike.








| ASIN | B09C1J2JPS |
| Bearing Number | T123 |
| Bearing Type | Ball Bearing |
| Best Sellers Rank | #32,884 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #14 in Precision Balls |
| Brand | Tanstic |
| Compatible Lubricant | Grease |
| Date First Available | August 6, 2021 |
| Item Thickness | 4 Millimeters |
| Item Weight | 10.2 ounces |
| Item dimensions L x W x H | 0.47 x 0.47 x 0.47 inches |
| Manufacturer | Tanstic |
| Material | Alloy Steel |
| Outside Diameter | 12 Millimeters |
| Product Dimensions | 0.47 x 0.47 x 0.47 inches |
J**S
Excellent bearing set
Works as advertised with plenty of options to choose from. I use it to replace the bearing on my honey extractor. So far, after a year, no rust and works as advertised. Great value for the money.
M**R
Great for fidget replacements
Fantastic set with a great storage case. Great assortment for fidgets that need replacement pieces. Would buy again.
A**R
Good product. Wide assortment
Meets all needs
N**E
Good
Excellent for the price, the only complaint is some of the balls are useless, very small
A**R
Worked as intended
Needed a 3.5mm ball for my Dewalt DCF809 since it's chuck survicing kit came with wrong size. This kit more than paid for itself already with just a single ball used. Invaluable!
D**.
Fidget toys and small marble runs
Here we are back in the workshop building up our supply of parts for 3d printed toys. Of course we need metal balls for various toys and gadgets. These are smaller than you'd use on a normal sized marble run, but plenty of things to build that utilize small metal balls. I almost enjoy looking at all the parts as much I do building things with them.
G**V
Wide assortment of ball metric bearings.
The plastic parts box comes with a variety of small metric ball bearings.
N**N
What I needed, for the most part
Had a little mishap as I opened the box, none of the bearings fell out, but became displaced inside the box. I decided to reorganize and cut flexible magnets to hold them in their box better. As I did so, I came to find that I did not get the full count of each size of magnets. Usually 2-3 bearings short in each size from 5.5mm and smaller; this is why I am giving it a 3. That said, the ball bearings were pretty much on the money to within 1 or 2 100ths of a mm as measured on my digital caliper to put them in the correct box.
G**N
el empaque muy bien y todo limpio
L**T
Un carré de billes vides
A**S
I bought this huge kit to use 2 tiny balls. They fit perfectly into a tool tensioner than I stupidly opened too wide when I was 14 feet in the air. Got them back in and it works now... What to do with the rest of these though????
T**S
Unfortunately they didn't work for what I wanted them for and I think I would probably have needed larger balls. So, now I'm stuck with a load of them and I'm going to have think outside of the box to come up with an idea on how best to use them all.
S**L
Honestly, I just purchased these primarily for the largest size, so I can replace some marble run balls - but the set themselves is good. Good container, and the balls are useful (for something, I'm sure) - good price for what you recieve.
Trustpilot
2 days ago
1 week ago