5 Inch Diamond Cup Grinding Wheel for Concrete Grinding, Floor Grinding Tools in Angle Grinder

5 Inch Diamond Cup Grinding Wheel for Concrete Grinding, Floor Grinding Tools in Angle Grinder

The Depressed Center Grinding Wheel 7" is the hot sale grinding disc in our company. JUMA ABRASIVE grinding disc 7inch (180x6.0x22.2mm) is exported to many countries , not only because of the best price , but also because our 7inch grinding disc can be instead of some famouse foreign brand . Best grinding ratio with best grinding efficiency make this grinding disc type popular in market .

Product Details

Our 14 inch Cut-off Wheels, Metal Cut Off Wheels, resin bonded Grinding disc is famous at home and abroad for their full functions, strong strength, high efficiency and good quality. Our company is equipped with an advanced product research and development center to continuously carry out technological reforms to improve the production process. Our reasonable capital structure can guide our behavior, standardize our development direction and improve our business performance. The same way can make us think of each other, and all our business management methods are based on our mission.

Production Introduction

This Premium Xtra Power Freehand Depressed Center 7" x 1/4" x 7/8"( 180x6.0x22mm) Type 27 Abrasive Wheels belong to the Resin Bonded Depressed Center Grinding Wheels used on freehand Type27 Xtra Power angle grinder machine mainly for metalworking grinding and stainless steel grinding .

The 7" x 1/4" x 7/8" Grinding wheels have outer size d1= 7 inch (180mm), inner hole dimension d2= 7/8 inch(22mm) and the thickness b= 1/4 inch(6.0mm) .


This Premium Xtra Power Freehand Depressed Center 7 x 1/4 x 7/8( 180x6.0x22mm) Type 27 Abrasive Aluminum Oxide Reinforced Resin Bonded Grinding wheels for Inox and Metal steel belong to the hot sale abrasive products in our products. We manufacture more than 2000000pcs 7 inch Grinding wheels to meet the markets need every month.

The  7"×1/4"×7/8" Depressed Center Grinding Disc manufactured by our company JUMA ABRASIVE CO., LTD have been directly exported to Thailand ,  Cambodia, Japan, South Korea, India、Sri Lanka , the Middle East, European countries ,the United States and so on . At the same time some famous abrasive cutting wheel and grinding wheel agents also cooperate with us and we supply the OEM products for their sale.  All the reason is the main advantages of our Depressed Center Grinding wheels as follow,

Easy and fast grinding

Long life durability and Maximum safety

Comfortable grinding experience

High metal removal rate, best stability, best efficiency,

Less material loss, noise and dust

7inch grinding disc for metal .jpg

The Premium Xtra Power Freehand Depressed Center 7 x 1/4 x 7/8( 180x6.0x22mm) Type 27 Abrasive Aluminum Oxide Reinforced Resin Bonded Grinding wheels  is mainly made of high quality Aluminum Oxide abrasive material and White Aluminum Oxide material, 2~4 pieces strengthen fiberglass protection nets and so on . 

The Aluminum Oxide abrasive material make the Xtra Power Grinding wheel get the long life durability character and the white Aluminum Oxide abrasive material make the Resin Bonded Grinding Disc get the best efficiency. So it can be used for Metal steel, tool steels, high-alloy stainless steels, heat-treated steels ,grey cast iron , malleable cast iron , cast steel , ductile graphite iron , manganese cast iron material and so on . Because of the advantages of our Depressed Center Grinding Disc, workers can have the comfortable grinding experience during the using process .

Abrasive Material Introduction

Grit Size Introduction

Hardness Introduction

A--aluminum oxide

16-24   coarse density

D-L  soft

C--silicon carbide

30-60   medium density

M-N medium

Z-- Zirconium aluminum

70-220  fine density

P-S  hard

ZA—Zirconium aluminum/aluminum oxide

T-Y  very hard

AC—aluminum oxide/silicon carbide

WA--white aluminum oxide


a) A-for general metalworking cutting and grinding
b) ZA or WA- for stainless steel cutting and grinding
c) C or GC-for non metal, stone cutting and polishing.

This kind of Resin Bonded Grinding Disc is mainly used on freehand Type27 Xtra Power angle grinder machine for grinding, so it can be named Type 27 Grinding Disc. The Freehand Grinding Wheels can be used for grinding, polishing and cleaning during the using process. The color of our Aluminum Oxide Grinding Disc can be black, red, and yellow. The maximum speed of our Aluminum Oxide Grinding Disc reach 80m/s.

Package Introduction

In our company, we supply the color carton box package to pack the T27 Depressed Center Grinding Disc with our international brand name “JUMA”.

At the same time, we can also supply the OEM products and design the special package to pack the cutting wheel and grinding wheel, if customer want use their brand name and have their special package

The package of this Abrasive Resin Bonded Grinding Wheel 7" x 1/4" x 7/8"( 180x6.0x22mm) as follow, 20pcs/ small bag, 80pcs/ carton box.


Other Information of Abrasive Depressed Center Grinding Wheel  7" x 1/4" x 7/8"( 180x6.0x22mm)


Material “A” and “WA”

Our International Brand :


Max speed .:


Certificate :

ISO9001/ MPA EN12413

Fiberglass Mesh:

1~ 4 net

Color :

Black / red /yellow

Sample :


Samples Finished time :


Payment Term

30% deposit, 70% T/T before shipment

Order delivery time :

Within 25days

Loading Port

Shanghai or others port

Place of Origin:

Henan Province , China

Quality Assurance

JUMA ABRASIVE CO., LTD have the strictly executes quality management system of ISO 9001 in company operation, equipped with advanced production facilities, has a leading level in product designing and development, and has a perfect and strict testing system for material collecting, procedure control, end-product testing and detailed records of production which have made the Company to be able to optimize its production mode successively so as to meet with higher requirements from the clients.


Production line testing equipment

Production Capacity

JUMA ABRASIVE CO., LTD. (hereinafter referred to as the Company), a well-known China enterprise, is engaged in manufacturing professional resin abrasives with its production scale being in the leading position of China. The company which was established in 1997 integrated product development, designing, production, sales and services into a whole. 

JUMA ABRASIVE CO., LTD. has already owned 150 sets of advanced manufacturing production line,50 sets in our old factory and the 100 new full automatic production line were put into use in our new factory which have 70,000 square meters with the registered capital ¥15,000,000. The company owns the staff of more than 500, the middle and advanced engineers, technicians and skillful workers account for over 60% of the staff.

Resin-bonded Abrasive Depressed Center Grinding Wheel Series in JUMA ABRASIVE CO., LTD





Box Qty



4 x1/4 x 5/8






4 1/2 x1/4x 7/8






5 x1/4x 7/8






6 x1/4x 7/8






7 x1/4x 7/8






9 x1/4x 7/8





We can supply many kinds of abrasive products, such as  cutting wheel, grinding disc, flap disc, flap wheel, abrasive fiberglass backings plate, and so on.

1.How many nets you have for the grinding wheel ?
We use triple reinforced nets for grinding wheel, and the type is 20g/sqm, while the others are still using the 180g/sqm
2. What is the grinding ratio of your grinding wheel?
It's 6.6:1 at least , while the average ration in China Market is from 2:1 to 5:1.
3.Do you accept OEM for customer's brand?
Yes, we do, but need MOQ for mass production. If take our brand, less qty with mix sizes are accepted.
4.Do you have inspection procedure before shipping:
Yes, we do, 100% QC inspection Before Shipment.

5.What is the delivery time? 
30 days for 1 container order. Roughly one or two weeks for sample order

6.What is your payment term?
Usually TT 30% deposit, and clear the balance before shipping.
7.What is your port of shipment?
Shanghai or Ningbo.

Welcome your inquiry and visit !

As one of the leading premium  xtra power  freehand depressed center 7" x 1/4" x 7/8"( 180x6.0x22mm) type 27 abrasive  aluminum oxide reinforced resin bonded grinding wheels for inox and metal steel manufacturers in China, Juma Abrasives now brings you the best quality and low price products from its professional factory. It is of the best performance, strong durability and long lifespan.

Our 5 Inch Diamond Cup Grinding Wheel for Concrete Grinding, Floor Grinding Tools in Angle Grinder and services are known for their reliability, innovation and efficiency, and have been widely praised by our customers. Our company establishes a long-term stable relationship with the world's leading express and logistics companies, offering fast and high quality services to as customers around the world. Our solid customer base has brought a strong impetus for future company growth. In line with the world, we promote the company with practical actions. We adhere to the guidance of theoretical technology and rich practical experience.
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