Description
Reviews
| Brand | - |
| Category | Industrial Small Parts / Bearings & Bushings |
| Origin | - |
| Material | Stainless Steel |
| Bearing Model | R188 |
| Inner Diameter | 6.3 mm |
| Outer Diameter | 12.7 mm |
| Width | 4.7 mm |
| Groove Type | U-Groove (Concave) |
| Performance Style | Dead Sleep |
| Lubrication | Unlubed (Factory) |
| Package Quantity | 5 Bearings |
| Origin | Imported |
Anonymous
Apr 15, 2026
Rating: 5/5
Smooth and quiet
Very quiet spinning compared to my old ceramic bearings. The U-groove makes the yo-yo feel responsive when I need it to bind. Highly recommend for beginners.
Anonymous
Apr 06, 2026
Rating: 5/5
Perfect for dead sleep tricks
These bearings are incredibly smooth right out of the package. I installed them in my aluminum yo-yo and the sleep time is impressive. Great value for a 5-pack.
Anonymous
Mar 06, 2026
Rating: 4/5
Good but needed cleaning
The bearings worked well, but one had a slight gritty feeling initially. After a quick clean with citrus solvent, it spun perfectly. Otherwise, great product.
Anonymous
Mar 02, 2026
Rating: 5/5
Reliable stainless steel
I prefer stainless steel for durability. These hold up well against humidity and sweat. The dead sleep characteristic is consistent across all five bearings.
Anonymous
Feb 10, 2026
Rating: 5/5
Exact fit for standard yo-yos
I was worried about the dimensions but they fit my standard size yo-yo perfectly. The 6.3mm inner diameter is spot on. Shipping was fast too.
Q: How many bearings are included in one order?
A: Each package contains exactly 5 stainless steel R188 bearings, enough for multiple yo-yos or replacements.
Q: Will these fit a Duncan Imperial yo-yo?
A: Yes, the R188 size (6.3x12.7x4.7 mm) is compatible with most standard size yo-yos including the Duncan Imperial.
Q: Are these bearings pre-lubricated?
A: No, these come unlubed from the factory to ensure maximum dead sleep performance. You can add oil if you prefer a responsive feel.
Q: What is the best way to clean these bearings?
A: We recommend using a citrus-based solvent or specialized bearing cleaner. Avoid water as it can cause rust on stainless steel over time.
Q: What is the difference between U-groove and C-groove?
A: U-groove bearings have a concave shape that offers a balance between sleep time and responsiveness, while C-groove is flat for maximum sleep.
1/5 Pack Silicone Kitchen Utensils Set for Cooking Baking
$43.12
Aizaofang 6-Cavity Triple Flower Silicone Mold - DIY Handmade Soap Home Decor - Food-Grade Heat-Resistant Material
$12.70
Single-Leg Manganese Steel Lifting Hook with Wide Opening for Hoists and Cranes
$92.00
Hesdick HZL-32 Portable Stone Removal Hook, Multi-Function Groove Tool for Car Tire Debris Cleaning
$9.28
PC Bonding Sealing Waterproof UV1901 Guardrail Tube Adhesive Shadowless Glue UV Glue Electronic Glue
$859.00
Wan Dian Wu Xian Stackable Toy Accessories - Vol.3 Prosperous Era Series Blind Capsule Figures for Desktop Display
$29.00
In Stock Commercial Vegetable Chopper and Meat Mincer - Grinding Machine for Baozi Fillings, Chili Dumplings, and Sausage WTP Meat Paste Processing
$5,805.00
Industrial Lint-Free Cloth for Cleaning Lenses, Optical Instruments, and Phone Screens; Microfiber Dusting Wipes
$81.58
Electric Barrel Water Dispenser Pump Automatic Water Lifter for Mineral and Purified Water
$74.00
F01RB0WA23 Transmission Valve for Roewe DQCT280 Remanufactured
$324.00
Full Payment Pre-order Guzi Bear DMMD Dramatical Murder Badge Polaroid Set Merchandise
$29.00
Peach Wood Sheepskin Rattle and Clapper Brass Traditional Handmade Baby Teething Hand Drum Newborn Gift Box
$29.90
Pirelli Run-Flat Tires 235/245/255/265/275/285 40 45 50 55R19R20R21
$350.00
Protective Case Lid for Pelican Cases - Laptop Insert for Models 1510, 1560, and 1535
$254.00
Universal 5800 Super Glue for Plastic, Metal, Glass, and Wood, 10-Second Fast Curing
$2.01
White Noise Wood Chip Core Grid Scented Candle Wooden Core S-Type Brand Name Candle Container Soy Candle Core Wood
$1.50
Zunjue 100% Cotton Paper Block 300g Watercolor Paper, Fine/Medium Grain, Thickened 80 Sheets, Neutral Acid-Free Journal Paper for Art Students, Beginners, Watercolor, Colored Pencil, Pen, Light Wash, Marker
$27.20
Outdoor Waterproof Dry Bag for Rafting and Creek Walking - Large Capacity Backpack for Swimming, Hiking, Diving, and Flood Rescue
$132.00
Lukang 995 Door and Window Fast-Drying Glass Sealant - Transparent Weather-Resistant Neutral Silicone Structural Adhesive
$222.90
Large Flip-Type Water Draining and Air Drying Machine, Fully Automatic Air Knife Blower for Vegetables, Commercial Continuous Drying Equipment
$15,282.00
Large Capacity Household Quilt Storage Bag - Waterproof and Moisture-Proof Duvet Organizer for Moving, Packing, and Luggage Sorting
$5.88
Scented Candle Aluminum Alloy Turntable 360-Degree Rotating Double-Sided Silent Non-Slip Small Turntable for Cake Decorating and DIY
$30.40
Ceramic Five Oxen Painting Brush Washer – Antique-Style Ink Well for Calligraphy & Traditional Painting
$16.90
Liupintang 3-in-1 Brush Washing Bucket with Palette - Portable Handheld Multi-Function Art Tool for Chinese Painting, Watercolor, and Gouache, Foldable Small Pail
$17.80
ZGT Type Damped Spring Vibration Isolator for Large Equipment such as Chillers and Diesel Generator Sets
$135.00
Shanlian Lake Brush Wool Felt Mat for Calligraphy and Painting, Washable Desk Pad for Beginners
$22.70
New Silicone Data Cable Protector, Anti-Break and Anti-Bite Cord Organizer for Charging Lines and Headphones, Universal Phone Accessory
$5.58
Cafeteria Bulb Vegetable Cutter - Complete Kelp Shredding Production Line, All-in-One Slicing, Dicing, and Shredding Machine
$10,000.00
Electric Water Dispenser Pump for Bottled Mineral Water - Automatic Press-Type Purified Water Pump Manufacturer
$113.00
Heavy-Duty Industrial Wiping Cloths for Auto Painting, Baking, Film Application, Detailing, and Degreasing – Absorbent, Oil-Removing, Lint-Free Paper and Cloth
$120.00
![[M2-M20] Stainless Steel Spring Washer](https://www.gosteppe.com/cache/medium/product/16306/legacy-main-ef3d2dba3bde669d48e6cca2.webp)
