71 Pcs Carbon Steel Ball Bearings Kit, Double Shielded 693ZZ-627ZZ | 693ZZ 623ZZ 624ZZ 685ZZ 687ZZ 627ZZ Double Shielded, for 3D Printer, RC Car, Small Pulley, DIY, Clear Label Storage Box
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Availability:
In Stock.
Arrives
Sunday, Nov 1
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At a glance
- Condition
- New
- Size
- 71Pcs
- Model
- 1mm-8mm
- Dimensions
- 7.48 x 3.94 x 0.67 in
- Weight
- 140 g
- Material
- 304 Stainless Steel Black
- Bearing Number
- 693ZZ/623ZZ/624ZZ/685ZZ/687ZZ/627ZZ
- In the box
- ball bearings
- Warranty
- We offer you 1 year warranty and 30 days return guarantee. If you have any dissatisfaction, please feel free to contact us and we will serve you immediately.
Features 5
- 71PCS COST-EFFECTIVE VARIETY PACK: Features 6 most-used sizes (693ZZ, 623ZZ, 624ZZ, 685ZZ, 687ZZ, 627ZZ) in one kit. No more project delays due to missing parts; this bulk set ensures you always have the right replacement for small pulleys and motors.
- DOUBLE METAL SHIELDED PROTECTION: Each bearing is double-shielded (ZZ) to prevent dust, debris, and contaminants from entering. Ideal for high-speed environments like RC cars and drones, solving the common pain point of internal friction buildup and premature failure.
- HIGH-PRECISION SMOOTH ROTATION: Engineered for low friction and minimal noise. Our carbon steel bearings provide stable performance for 3D printer extruders and cooling fans, eliminating the annoying squeaking sounds reported in low-quality competitors.
- DURABLE CARBON STEEL BUILD: Made of high-quality carbon steel with a sleek silver finish. These bearings offer reliable load support and wear resistance for home appliances and hobby crafts, providing a sturdy alternative to plastic bushings.
- EXTENSIVE DIY COMPATIBILITY: Perfectly sized for 3D printers, robotic models, skateboards, and miniature machinery. Whether you are a hobbyist or a repair tech, this assorted kit provides the exact fit for most small-scale mechanical assemblies.
Description
Tired of interrupting your DIY projects just because you're one bearing short?Meet the LUKAISEN 71PCS Ball Bearings Assortment Kit—the ultimate solution for makers, hobbyists, and repair enthusiasts. Imagine you are finally assembling your custom 3D printer or tuning your RC racing car, only to find a seized bearing. Instead of waiting days for a single replacement, you simply reach for your LUKAISEN kit and find the exact 623ZZ or 624ZZ you need in seconds.Why Choose LUKAISEN?Unlike standard packs that only offer 10 or 20 pieces, our 71-piece mega set is designed to solve the "quantity gap." Each bearing features a double metal shield to keep lubricants in and dust out, ensuring your machines run whisper-quiet and smooth. Crafted from precision carbon steel, these bearings handle the daily wear and tear of small motors and pulley systems with ease.What's in the box? 13x 693ZZ (3x8x4mm) 13x 623ZZ (3x10x4mm) 13x 624ZZ (4x13x5mm) 12x 685ZZ (5x11x5mm) 10x 687ZZ (7x14x5mm) 10x 627ZZ (7x22x7mm)From restoring vintage hardware to building the next generation of robotics, LUKAISEN provides the reliability and variety your workbench deserves. Don't let a tiny part stop your big ideas—upgrade your toolkit today!
Specs 17
| Brand | LuKaiSen |
|---|---|
| Material | 304 Stainless Steel Black |
| Item dimensions L x W x H | 7.48 x 3.94 x 0.67 inches |
| Item Weight | 140 g |
| Bearing Number | 693ZZ/623ZZ/624ZZ/685ZZ/687ZZ/627ZZ |
| Brand Name | LuKaiSen |
| Bearing Type | Ball Bearing |
| UPC | 737730952469 |
| Number of Items | 71 |
| Set Name | LUKAISEN 71 Pcs Carbon Steel Ball Bearings Kit, Double Shielded 693ZZ-627ZZ |
| Part Number | LK-71 |
| Unit Count | 1 Count |
| Manufacturer | LuKaiSen |
| Model | 1mm-8mm |
| Item Dimensions | 7.48 x 3.94 x 0.67 inches |
| Item Thickness | 4 millimeters |
| Material Type | 304 Stainless Steel Black |
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Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 1
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Awesome
Size: 71Pcs
My Husband loves it cause of the different sizes.
Reviewed in the United States on August 9, 2026 by Deb
So many balls, so little time
Size: 700Pcs ASE
Haven’t actually used this yet but wanted to have it on hand should the bearings on my e-bike go south. The front wheel still uses individual bearings.
Reviewed in the United States on July 26, 2026 by Robert T Burak
Great Value
Size: 640Pcs
Just what I need for replacement bearings in a steering gear box rebuild. Good value.
Reviewed in the United States on July 15, 2026 by Amazon Customer
Wrench repair
Size: 640Pcs
Works great repairing my wrenches
Reviewed in the United States on July 15, 2026 by Ronald Saur Jr.
700 Ball Bearings — One of Those Kits You Don’t Need… Until You REALLY Need It
Size: 700Pcs ASE
They’re balls. They’re steel. There are 700 of them. Mission accomplished. RATING: 5 out of 5 steal balls!!! OVERVIEW & TL;DR • I mean, if you need some ball bearings, this is a pretty good kit! 😂 You get 700 G25 steel ball bearings, which is enough that I’m probably going to have this box sitting in my garage for years. I originally picked it up for motorcycle repairs and general garage/mechanical projects, but it has already come in handy for replacing missing balls in some of my skateboard bearings as well. That’s really the appeal here: it’s a relatively inexpensive assortment of small precision steel balls that can save you from replacing an entire bearing, detent mechanism, or assembly simply because one tiny steel ball launched itself into another dimension during disassembly. The G25 specification is also reassuring for something like this. These aren’t just random BBs or decorative steel balls — they’re intended for applications where reasonably consistent sizing and roundness actually matter. For the home mechanic, tinkerer, motorcycle owner, skateboarder, or anyone who routinely takes mechanical things apart, this is exactly the kind of kit that earns a permanent spot in the parts drawer. ______ PROs * 700 pieces — unless you’re rebuilding bearings for a living, this should last quite a while. * G25-grade steel balls rather than a box of mystery metal spheres. * Great for motorcycle repair and maintenance projects. * Useful for replacing lost or missing balls in serviceable skateboard bearings. * Handy for detents, bearings, mechanical projects, repairs, and general tinkering. * Much better than discovering you’re missing one tiny ball and having to replace an otherwise perfectly usable component. * Great addition to a home garage, workshop, or miscellaneous hardware collection. * Having an assortment on hand means you can actually match what you need instead of improvising. * Compact way to keep a surprisingly large number of replacement bearings available. ______ CONs * It’s 700 steel balls. There isn’t exactly a revolutionary feature set to evaluate here. 😂 * Make sure you measure the original ball carefully before using a replacement. “Looks about right” isn’t a great standard when you’re dealing with bearings or safety-critical mechanical components. * For critical motorcycle components, I’d still follow the manufacturer’s service procedure and replace the complete bearing/assembly when specified rather than assuming an individual ball replacement is appropriate. Bottom Line This is one of those boring-but-awesome garage purchases. I bought the set primarily for motorcycle projects and replacing missing balls in skateboard bearings, and it does exactly what I wanted: gives me a big supply of accurately sized steel balls sitting in the garage whenever some microscopic piece of hardware inevitably escapes during a repair. If you work on motorcycles, bikes, skateboards, tools, or basically anything containing bearings or detent mechanisms, having a box like this around is surprisingly useful. 5/5!!
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Reviewed in the United States on August 10, 2026 by Ghost Rider
Good assortment for all sorts of projects
Size: 640Pcs
I do all sorts of odd projects and have found that keeping an assortment of steel bearing balls like this around is a lot more convenient than I'd have thought originally. I use these for all sorts of things; from replacing lost bearings in toys or odd household items to replacing lost retaining balls (the spring loaded sort) in a couple of tools, to using one of the larger ones in small paint bottles to help mix the paint. These are good quality, and the assortment contains a wide variety of sizes that let you find something that will work in most of the instances I mentioned; so it's a really versatile assortment to keep on hand. The stainless steel construction helps keep them in good condition when the environment they operate in isn't the greatest. Overall, this is a great kit to have if you fix any of your own (or even other's) things; and after one or two times fixing something and not having to spend the money to replace it this kit has paid for itself, especially at its reasonable price point.
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Reviewed in the United States on July 14, 2026 by Troublco
The 1 mm Balls Actually Made Me Giggle
Size: 640Pcs
I ordered this assortment for a couple of specific projects. I have a vintage Lazy Susan with rusty bearing balls that I'd like to restore, and I also use stainless steel balls in some of my paint bottles to help mix the paint, so I figured having an assortment of sizes around would come in handy. Everything is organized by size in a plastic case, and the 1 mm and 2 mm balls come packaged separately. They have to. If those spilled, you would never find them. Ever. They'd disappear and probably go to hang out with your lost socks... wherever that place is. What surprised me the most was just how unbelievably tiny the smallest sizes are. I knew they were 1 mm, but until you actually see one in person, it's hard to appreciate just how microscopic they really are. I honestly don't have a use for anything that small, but I can certainly see where someone working on precision equipment or tiny mechanisms would, and I am amazed and impressed if that's you. Hat's off to you. That's some skill set... oh, and patience. For me, the larger sizes are the ones I'll probably use the most, especially for restoring vintage items or dropping into paint bottles to help mix paint. That's what made this assortment appealing in the first place. Instead of buying one size, I now have a range available whenever I run into an odd project. Overall, I think this is a handy assortment to keep around if you enjoy repairing, restoring, or tinkering with things. I may never use the tiniest ones, but I'd rather have them and not need them than need one someday and not have it.
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Reviewed in the United States on July 3, 2026 by T..isMe
Comprehensive bearing ball assortment with durable steel construction for repairs
Size: 700Pcs ASE
Used this for replacing worn bearing balls during equipment and bicycle repairs, and the biggest advantage is having multiple sizes organized in one kit instead of searching for individual replacements when a repair comes up. In actual use, the assortment covers several common imperial sizes, making it useful for bicycle hubs, pedals, bottom brackets, casters, and other projects that use loose ball bearings. Having a large quantity of each size means there's plenty available for future maintenance. The G25 chrome steel bearing balls feel well made, with a smooth finish and consistent sizing. They roll smoothly and fit properly in compatible bearing races, making them suitable for rebuilding or servicing worn assemblies. One thing I noticed is that selecting the correct size is important since even a small difference in diameter can affect bearing performance. Measuring the original bearing balls before installation helps ensure the best results. The storage case keeps each size separated and clearly organized, making it easy to find the right bearings without mixing them together. The chrome steel construction also gives confidence in long-term durability and wear resistance. Overall, this is a practical bearing assortment with good quality, useful size selection, and convenient organization, making it good value for money for DIY mechanics, bicycle maintenance, workshop repairs, and anyone who regularly services equipment with loose ball bearings.
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Reviewed in the United States on July 24, 2026 by Amazon Customer