---
product_id: 311351014
title: "SUNJOYCO 4.5 Inch Concrete Grinder Wheel, Diamond Cup Grinder, 12 Turbo Segments Concrete Grinding Wheel, Diamond Grinding Disc for Masonry, Cement, Marble, Rock, Granite, 0.87 Inch Arbor"
brand: "sunjoyco"
price: "₩65603"
currency: KRW
in_stock: true
reviews_count: 8
url: https://www.desertcart.kr/products/311351014-sunjoyco-4-5-inch-concrete-grinder-wheel-diamond-cup-grinder
store_origin: KR
region: South Korea
---

# Premium diamond segments 4.5 inch diameter 6 cooling holes SUNJOYCO 4.5 Inch Concrete Grinder Wheel, Diamond Cup Grinder, 12 Turbo Segments Concrete Grinding Wheel, Diamond Grinding Disc for Masonry, Cement, Marble, Rock, Granite, 0.87 Inch Arbor

**Brand:** sunjoyco
**Price:** ₩65603
**Availability:** ✅ In Stock

## Summary

> 💎 Grind smarter, not harder — the pro’s choice for flawless finishes!

## Quick Answers

- **What is this?** SUNJOYCO 4.5 Inch Concrete Grinder Wheel, Diamond Cup Grinder, 12 Turbo Segments Concrete Grinding Wheel, Diamond Grinding Disc for Masonry, Cement, Marble, Rock, Granite, 0.87 Inch Arbor by sunjoyco
- **How much does it cost?** ₩65603 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/311351014-sunjoyco-4-5-inch-concrete-grinder-wheel-diamond-cup-grinder)

## Best For

- sunjoyco enthusiasts

## Why This Product

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

## Key Features

- • **Universal Fit:** Compatible with most grinders featuring 0.87 or 0.63 inch arbors for versatile use.
- • **Built to Endure:** Premium diamond construction ensures superior wear, heat, and corrosion resistance.
- • **Cool & Quiet Operation:** Innovative 6-hole cooling design reduces heat buildup and noise for longer tool life.
- • **Turbocharged Precision:** 12 turbo segments deliver rapid, smooth material removal with minimal vibration.
- • **Wet or Dry Flexibility:** Optimized for both wet grinding to extend lifespan and dry grinding for faster results.

## Overview

The SUNJOYCO 4.5 Inch Diamond Cup Grinder Wheel features 12 turbo diamond segments on a durable 5mm thick disc, designed for fast, stable grinding on concrete, stone, and tile. Its 0.87 inch arbor fits most angle grinders, while 6 cooling holes enhance heat dissipation and noise reduction. Built for both wet and dry use, this premium grinding wheel offers exceptional durability and efficiency for professional-grade results.

## Description

This 4.5 inch diamond cup wheel fits most grinders with a 0.87 inch or 0.63 inch arbor. With 12 turbo segments and 5mm thickness, it delivers fast, stable grinding on concrete, stone, and tile. Made from premium diamond, it offers excellent durability and resistance to wear, heat, and corrosion. Six cooling holes help control temperature and reduce noise during use. Works with both wet and dry grinding—wet for longer life, dry for higher efficiency.

## Features

- Specifications: Diameter 4.5 inch, arbor 0.87 inch, with a 0.63 inch inner diameter reducer ring. The diamond cup grinder fits most angle grinders and concrete grinders with a 0.87 or 0.63 inch arbor
- Fast & Stable Grinding: With 12 turbo segments and 5mm thickness, the concrete grinding disc removes material quickly with smooth, low vibration performance and clean finishes on concrete, stone, and tile
- Built to Last: Made from premium diamond, this concrete cup grinding wheel offers superior durability with excellent wear, heat, and corrosion resistance
- Heat Dissipation: The concrete grinder wheel features 6 cooling hole design to help regulate temperature and reduce noise, maintaining the wheel’s optimal performance
- Wet & Dry Use: Wet use for reducing heat, dust, and cracking, and for extending the concrete grinder disc life; dry use for speeding up tasks

## Product Details

- **Grit Material:** Diamond
- **Product Dimensions:** 4.5"L x 4.5"W
- **Brand:** SUNJOYCO
- **Compatible Devices:** Angle Grinder
- **Grit Type:** Medium

## Images

![SUNJOYCO 4.5 Inch Concrete Grinder Wheel, Diamond Cup Grinder, 12 Turbo Segments Concrete Grinding Wheel, Diamond Grinding Disc for Masonry, Cement, Marble, Rock, Granite, 0.87 Inch Arbor - Image 1](https://m.media-amazon.com/images/I/816mkCCWIYL.jpg)
![SUNJOYCO 4.5 Inch Concrete Grinder Wheel, Diamond Cup Grinder, 12 Turbo Segments Concrete Grinding Wheel, Diamond Grinding Disc for Masonry, Cement, Marble, Rock, Granite, 0.87 Inch Arbor - Image 2](https://m.media-amazon.com/images/I/818g1mqY9EL.jpg)
![SUNJOYCO 4.5 Inch Concrete Grinder Wheel, Diamond Cup Grinder, 12 Turbo Segments Concrete Grinding Wheel, Diamond Grinding Disc for Masonry, Cement, Marble, Rock, Granite, 0.87 Inch Arbor - Image 3](https://m.media-amazon.com/images/I/81f7ah4P4cL.jpg)
![SUNJOYCO 4.5 Inch Concrete Grinder Wheel, Diamond Cup Grinder, 12 Turbo Segments Concrete Grinding Wheel, Diamond Grinding Disc for Masonry, Cement, Marble, Rock, Granite, 0.87 Inch Arbor - Image 4](https://m.media-amazon.com/images/I/81iTA88aeML.jpg)
![SUNJOYCO 4.5 Inch Concrete Grinder Wheel, Diamond Cup Grinder, 12 Turbo Segments Concrete Grinding Wheel, Diamond Grinding Disc for Masonry, Cement, Marble, Rock, Granite, 0.87 Inch Arbor - Image 5](https://m.media-amazon.com/images/I/71zV4A60AML.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: Whats the grit difference with color difference**
A: It's the same. Just color difference

**Q: What is the maximum RPM for this wheel?**
A: Grinding wheel maximum RPM : 12000（rmp）

**Q: What is the height of the wheel, as viewed with the grinding surface down?  I need to fit a dust shroud, so I'm looking for a 3/4" height.**
A: I think it's .866 of an inch thick

**Q: Will this fit the bosch 4-1/2-inch angle grinder 1375a?**
A: Please check the size first:

Outer diameter: 100 mm / 4 inches
Inner hole diameter: 20mm / 0.79 inches (without metal ring)
Inner hole diameter: 16mm / 0.63 inches (with metal ring)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked perfectly for my grinding project
*by C***D on September 29, 2019*

I needed to grind some adhesive off the back of some loose floor tiles (so old that I couldn't get replacements). After looking around, I really didn't want to pay over $40 for a grinding wheel, when I found this concrete grinding wheel. For the price, I figured I'd give it a try. I'm very impressed! In fact, I had to be careful, as this wheel worked so well. Since it comes with a 20mm ID (arbor hole), I hesitated -- until I read that it comes with an adapter "ring" to neck it down to fit on a 16mm (5/8") arbor. Now, it's a little tricky fitting the adapter ring, but it only took me a few seconds. So, for the price I'd recommend this as a great alternative to the more expensive wheels. My guess is that it'll work well on concrete/masonry for small jobs. Recommended.

### ⭐⭐⭐⭐⭐ Worked great.
*by D***R on October 14, 2024*

Used to grind down super old cement and it did its job. Didn’t wear down all that much so I get to save for the next job.

### ⭐⭐⭐⭐ Would have given 5 stars except I didn't receive a blue one. Gold instead
*by S***. on August 4, 2022*

I'm a bit of a stickler for buying what is advertised. In this case though, I do not think that the blue one could possibly be more effective and solid than the gold one I received. Seriously, I bought it because it seemed ridiculous to spend $40-60 at local big box places. And earlier in the day of My order I paid $30 at the harbor place but didn't use it and the next day my needs were more than met with this one. Using it to grind and level a cement product that I used in preparation to lay vinyl planks. Must use with dust shroud attached to shop vac. But it grinds the cement so precisely and consistently and has not faltered in the least after my guess is 4 solid hours over 8 sessions. Super product.

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**Shop now:** [https://www.desertcart.kr/products/311351014-sunjoyco-4-5-inch-concrete-grinder-wheel-diamond-cup-grinder](https://www.desertcart.kr/products/311351014-sunjoyco-4-5-inch-concrete-grinder-wheel-diamond-cup-grinder)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-24*