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.
Blue Scale Line Printing Machine Pad with Ruler Markings for Water-Based Ink Printing
$80.00
Sponge Drain Rack for Kitchen Countertop - No-Drill Sink Organizer for Cloths and Narrow Edge Faucet Storage
$5.80
Kids' Art Round Sponge Stamp Brush for Kindergarten DIY Crafts, Mushroom Head Painting Tool
$3.59
Caiyan Art Blending Stumps for Oil Pastels and Sketching – Washable EVA Tips for Smooth Color Transition; Non-Staining, Ideal for Art Students
$6.50
Paper Blending Stump Set for Sketching, Oil Pastels, and Highlighting – Ultra Soft
$3.83
Tire Stone Removal Hook with Built-in Screwdriver - Multi-Function Tool for Tire Cleaning, Window Breaking, and Self-Defense
$8.90
Blower Motor Compatible with Hummer H3, Hummer H2, and Cadillac Escalade
$340.00
Custom Fertilizer Integration Machine for Agriculture and Landscaping - Smart Quantitative Mobile Filtration System
$1,960.00
High-Speed Cell Sieve with Handle - Stainless Steel Laboratory Sieves (100, 200, 300, 400, 600 Mesh)
$61.74
Stainless Steel Food Warmer for Hotels and Breakfast Buffets - Commercial Flip-Top Chafing Dish with Insulation; Compatible with Induction Cookers
$1,288.00
Marie's Blending Stumps Set for Sketching and Shading, Professional Art Supplies for Students
$2.55
National Standard JB/ZQ4606-86 Felt Oil Seal Ring - Bearing Oil Absorption, Dustproof, Industrial Wool Felt Gasket Strip
$0.50
Qingzhu Sketching Eraser Knife and Paper Stump Tool Set for Art Students - Includes Replacement Tips, Gray Surface Pens, Makeup Sponge Blenders, Cotton Swabs, Foam Balls, Soft Blending Pens, Precision Insert Knives, and Sketch Eraser Balls
$7.20
4-Leg Chain Rigging Set - Alloy Steel Lifting Tool (1-200 Tons) with Multi-Leg Electromagnetic Chuck
$52.50
Commercial 1.8/2.2m Food Warmer Cabinet for Fried Chicken and Burger Shops, French Fry Heating Unit, 1.5m Two-Way Pickup Display Case
$3,573.50
Commercial Electric Heated Stainless Steel Fast Food Serving Counter Soup Warmer Buffet Cart
$842.00
Natural Crystal White Azeztulite Loose Beads with Rainbow Luster for DIY Necklaces, Bracelets, and Jewelry Making
$5.54
Ai Zao Fang Six-Cavity Oval Totem Handmade Soap Silicone Mold - Yields Approx. 115g per Bar
$17.70
Zunjue Wire-Bound 8K Watercolor Notebook 300g Watercolor Sketchbook Loose-Leaf Portable 16K Water-Soluble Colored Pencil Notebook Coil-Bound 32K Medium Coarse Fine Grain 200g Kids Students A4 Watercolor Notebook Plein Air Sketch Drawing Book
$7.65
Yuan Dynasty Calligraphy by Zhao Mengfu - Small Regular Script Diamond Sutra Brush Tracing Long Scroll Copybook, Original Version, Wholesale and Customization Available
$15.00
Kodak Photo Printing Service - High-Definition Prints from Your Phone with Lamination and Album Binding
$12.47
Shenzhen Custom Storefront Signage and Lightbox Installation - Illuminated Letters and Shop Plaques
$50.00
Automotive AC Refrigerant Gauge Set – R134a Pressure Meter with Dual Valve Tool for Home R22/R410 Air Conditioning Systems
$329.00
Complete Collection of Taoist Talisman Art Copybooks - Zhengyi Thirty-Six Generals, Calligraphy Practice Sheets with Stroke Order and Red Tracing, Classic Taoist Calligraphy
$38.00
Marie's Blending Knife Replacement Head Set Sketch Blending Tools Sponge Stumps Paper Stumps for Art Students
$4.25
French Imported Arches Watercolor Paper - Handmade 100% Cotton, 300g-850g, Medium/Rough Grain, Extra-Large Rolls and Sheets (4K, Full, Half, Quarter)
$33.10
Commercial Countertop Food Warmer Display Case - For Fried Chicken, Burgers, Egg Tarts, Pies, Youtiao, and Shaobing
$720.00
Integrated Hospital Wastewater Treatment Unit Underground Integrated Sanitary System Sewage Discharge Unit Eco-Friendly Wastewater
$10,000.00
Double Loop Lifting Chain with Rebar Bottom Hook - Manganese Steel Sling for Heavy Duty Rigging
$29.00
Screw Press Screw Sludge Dewatering Machine Sewage Treatment Equipment Rotary Type
$17,600.00
![[M2-M20] Stainless Steel Spring Washer](https://www.gosteppe.com/cache/medium/product/16306/legacy-main-ef3d2dba3bde669d48e6cca2.webp)
