---
product_id: 25384568
title: "BC PrecisionPremium 4” Chrome Steel Large Bearing Ball – G100 Precision Grade for Industrial & Mechanical Use – High Tolerance, Mirror Finish – Better Than Low Grade Alternatives"
brand: "bc precision"
price: "₩186233"
currency: KRW
in_stock: true
reviews_count: 8
url: https://www.desertcart.kr/products/25384568-bc-precisionpremium-4-chrome-steel-large-bearing-ball-g100-precision
store_origin: KR
region: South Korea
---

# 4" Diameter AISI 52100 Steel High Precision G100 BC PrecisionPremium 4” Chrome Steel Large Bearing Ball – G100 Precision Grade for Industrial & Mechanical Use – High Tolerance, Mirror Finish – Better Than Low Grade Alternatives

**Brand:** bc precision
**Price:** ₩186233
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate Your Projects with Precision Power!

## Quick Answers

- **What is this?** BC PrecisionPremium 4” Chrome Steel Large Bearing Ball – G100 Precision Grade for Industrial & Mechanical Use – High Tolerance, Mirror Finish – Better Than Low Grade Alternatives by bc precision
- **How much does it cost?** ₩186233 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/25384568-bc-precisionpremium-4-chrome-steel-large-bearing-ball-g100-precision)

## Best For

- bc precision enthusiasts

## Why This Product

- Trusted bc precision brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smooth Operation:** Designed to reduce friction and enhance efficiency.
- • **Quality Assurance:** Each ball meets stringent G100 standards for reliability.
- • **Durable Construction:** Made from premium AISI 52100 chrome steel for longevity.
- • **Precision Engineering:** Crafted for unmatched accuracy and performance.
- • **Versatile Applications:** Ideal for various mechanical and DIY projects.

## Overview

This 1 Pack of Large 4" Inch Chrome Solid Steel Bearing Balls (G100) is engineered from high-quality AISI 52100 chrome steel, ensuring exceptional durability and precision for a wide range of applications. Perfect for professionals and DIY enthusiasts alike, these bearing balls are designed to deliver smooth operation and reliability in every project.

## Description

BC PrecisionPremium 4” Chrome Steel Large Bearing Ball – G100 Precision Grade for Industrial & Mechanical Use – High Tolerance, Mirror Finish – Better Than Low Grade Alternatives

## Features

- High Precision Grade G100
- Finest Quality AISI 52100 Chrome Steel

## Product Details

- **Brand:** BC Precision
- **Material:** Steel
- **Item dimensions L x W x H:** 4 x 4 x 4 inches
- **Bearing Number:** G100
- **Bearing Type:** Ball Bearing

## Images

![BC PrecisionPremium 4” Chrome Steel Large Bearing Ball – G100 Precision Grade for Industrial & Mechanical Use – High Tolerance, Mirror Finish – Better Than Low Grade Alternatives - Image 1](https://m.media-amazon.com/images/I/614cN5+hz-L.jpg)
![BC PrecisionPremium 4” Chrome Steel Large Bearing Ball – G100 Precision Grade for Industrial & Mechanical Use – High Tolerance, Mirror Finish – Better Than Low Grade Alternatives - Image 2](https://m.media-amazon.com/images/I/51knt6zlUcL.jpg)
![BC PrecisionPremium 4” Chrome Steel Large Bearing Ball – G100 Precision Grade for Industrial & Mechanical Use – High Tolerance, Mirror Finish – Better Than Low Grade Alternatives - Image 3](https://m.media-amazon.com/images/I/71P7kM7+KyL.jpg)
![BC PrecisionPremium 4” Chrome Steel Large Bearing Ball – G100 Precision Grade for Industrial & Mechanical Use – High Tolerance, Mirror Finish – Better Than Low Grade Alternatives - Image 4](https://m.media-amazon.com/images/I/81tFlZ51+ML.jpg)

## Questions & Answers

**Q: How much does this ball weigh?**
A: This balls weighs 9.45 pounds.  We thank you for your interest.

**Q: Would this ball be attracted by a magnet?**
A: Yes, chromium steel is attracted to a magnet.

**Q: Can this steel be welded?**
A: Yes, but it would be best to use a TIG welder.

**Q: can they be drilled and tapped for a bolt to insert?**
A: These balls are 60 to 67 Rockwell so can only be drilled with carbide or diamond drills and tapping is out of the question. If you need a threaded hole use a threaded insert that's press fit, brazed, soldered, or bonded with something like Loctite 603.

## Customer Reviews

### ⭐⭐⭐⭐⭐ " Its mine... my own... my precious!"
*by D***R on May 20, 2023*

I'm convinced, it very easily could have been "Lord Of The Balls" instead of the rings... But I guess " One Ball to rule them all" sounds a bit corny. LOL - It truly is a fascinating object. Few things you see or feel have these qualities of weight, shape, smoothness, reflection, temperature. I have the 2,3 and 4 inch. The 3 inch are amazing for self-message pressing deep into muscle as it glides along. I got the 4 inch because I was drawn to it's power!!! I really hope I don't have to make that trek to some fiery mountain to throw them away....The quality of each was very good... shiny, smooth, and PRECIOUS!!! OH NO... They have a 5 inch one???

### ⭐⭐⭐⭐⭐ It's a big shiny solid heavy ball. This is much more fun than it sounds
*by J***X on December 10, 2018*

It's almost the size of a bocce ball or candlepin bowling ball, but like 4-5 times as heavy (about as heavy as the head of a medium size sledgehammer, so be advised accordingly).Magnets stick to it. It could make for a really neat storage unit for magnetic pushpins.It is precision engineered to a tolerance of about 10 microns (what G100 means, conservatively approximating)It has a mirror-like finish, though they're engineered for their smoothness and not reflectivity, so it's not as bright as a mirror reflection.It arrived in two nested bags inside a small cardboard box, covered in a lubricant (they are industrial after all), but it washes off easily with soap and water.It is a physically compelling object with no obvious application in the home, but their large inertia and incredibly smooth rolling/spinning makes them fun to play with.You will want a stand with a divot in it that it can rest in, because it's heavy, hard enough, and round enough to roll at the slightest incline. It's also heavy enough that I would worry about denting/breaking floorboards if they fell from desk height or higher. Please roll responsibly.

### ⭐⭐⭐⭐⭐ Huge!
*by D***I on August 4, 2020*

Oh man - this things is cool! I got a 3” ball a while ago then this one ... even though it’s only 1” bigger than the 3” - it seems like twice as big! It’s super heavy, smooth, shiny and BIG. I like holding it, rolling it around, feeling the weight and exercising with it. I am definitely going to end up getting a 5” as soon as I can afford it!

## Frequently Bought Together

- (1 Pack) Large 4" Inch Chrome Solid Steel Bearing Ball G100 - BC Precision
- (2 Pack) 2" Inch Chrome Steel Bearing Balls G25 - BC Precision
- One 3" Inch Chrome Steel Bearing Ball G100

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**Shop now:** [https://www.desertcart.kr/products/25384568-bc-precisionpremium-4-chrome-steel-large-bearing-ball-g100-precision](https://www.desertcart.kr/products/25384568-bc-precisionpremium-4-chrome-steel-large-bearing-ball-g100-precision)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-01-25*