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Premium Xtra Power Freehand Depressed Center 9 x 1/4 x 7/8( 230x6.0x22mm) Type 27 Abrasive Aluminum Oxide Reinforce Resin Bonded Grinding Discs for Stainless and Metal steel

This 9inch depressed center grinding disc grinder 230x6.0x22.2mm mainly for metalworking grinding and stainless steel grinding . It belong to the European standard grinding disc with 4 nets . Best quality with best price make it very popular in the market.

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Product Details

Production Introduction

This Premium Freehand Grinding Disc 9" x 1/4" x 7/8"( 230x6.0x22mm) used on freehand Type27 Xtra Power angle grinder machine mainly for metalworking grinding and stainless steel grinding . It belong to the Resin Bonded Depressed Center Grinding Wheels

The 9" x 1/4" x 7/8"( 230x6.0x22mm) Grinding Disc have outer size d1= 9 inch (180mm), inner hole dimension d2= 7/8 inch(22mm) and the thickness b= 1/4 inch(6.0mm) .


The 9 inch Grinding Discs for Metal Steel 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 9 inch Depressed Center Grinding Disc with four strengthen fiberglass protection nets belong to the hot sale abrasive products in our Depressed Center Grinding Wheels series.

The 9" x 1/4" x 7/8"( 230x6.0x22mm) Depressed Center Abrasive 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. We manufacture more than 1500000pcs to meet the markets need every month.

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
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 9" x 1/4" x 7/8"( 230x6.0x22mm) as follow, 20pcs/ small bag, 80pcs/ carton box.


Other Information of Abrasive Depressed Center Grinding Wheel   9" x 1/4" x 7/8"( 230x6.0x22mm)


Material “A” and “WA”

Our International Brand :


Max speed .:


Certificate :

ISO9001/ MPA EN12413

Fiberglass Mesh:

2~ 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. 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 for flap disc, and so on.

Business cooperation 

cutting wheel business cooperation .png

Safety considerations(Please Read Before Use)

Cut-off and Grinding disc Requirements
(a) Hold machine firmly.
(b) Secure work piece tightly.
(c) Avoid side pressure when cutting.
(d) Do not use cutting disc for grinding.
(e) When grinding approach work piece at correct angle.
(f) When cutting always cut in a straight line. Do not try and cut curves.
(g) Make sure guard is in correct position.
(h) Make sure abrasive discs are mounted correctly and are tightly held.
(i) Make sure the set of flanges used are free form damage and are the correct matching set for the machine being used.
(j) After switching off machine make sure the rotation has stopped before putting machine down.

As one of the leading premium  xtra power  freehand depressed center 9" x 1/4" x 7/8"( 230x6.0x22mm) type 27 abrasive  aluminum oxide reinforce resin bonded grinding discs for stainless and metal steel manufacturers in China, JUMA ABRASIVE 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.

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