Which style you like - Grinding surface made by different mould .

The 2 grinding discs in the photo is the same composition but with totally different grinding surface, do you know why ?

The answer is we using different mould. A disc using hard mould and B disc using soft mould , you can see the B disc black paper insert and bonded tightly with the reinforce net and abrasives oxide.

Resin bonded grinding disc

Blueshark professional combined 2 in 1 ( Cutting + Finishing ) discs !

Blueshark professional combined 2 in 1 ( Cutting + Finishing ) discs testing demo !!!

One discs, can do cutting and finishing at the same time, save much your labor's and abrasives cost ! mainly in below size:100x2x16mm / 115x2.5x22.23mm / 125x2.5x22.23mm.

Bluehsark heavy task 230mm/9" inch grinding discs testing demo......

Bluehsark heavy task 230mm grinding discs demo......

The 230x6x22.23mm - 9x1/4x7/8"inch grinding discs really popular in Africa market. We received one customer's samples testing feedback last week and the customers very satisfy with ours heavy-task 9" grinding discs performance.

This customer told us before - he sourcing many famous brands using in their workshop but seems no one is OK. He finally tested our samples and really bring much surprise to the workers. " We like this new workmate-Blueshark Abrasives" -the worker Mr. Michael said.

Welcome visit http://www.abrasives-wheel.com/en.html for more products detaisl.

BLUESHARK Resin Bonded Green-Tooth Grinding Discs

BLUESHARK Green Tooth Grinding Discs !!! 

It's made from innovative mixed green abrasives and special designed for stainless steel & INOX applications. The excellent fast & cooling cutting ability and long using life can meet professional stainless steel and INOX cutting & grinding requirements.

ADVANTAGES:
*Cooling, Sharp, Fast with minimal product wear
*Specifically designed for high stainless steel & INOX
*The disc body color is green
*Low dust & noise
*Comfortable hand-feeling

Welcome visit http://www.abrasives-wheel.com/ for more details.

New year, New Blueshark Abrasives......

New year, New Blueshark Abrasives......

We thanks for all your support and will try our best supply most competitive abrasives solution: 

From the D.I.Y to professional line...... 
From the cutting to polishing requirements......
From the quality abrasives discs to after-sale service......

We are always on the way ......

BLUESHARK TURBO Flexible Grinding Disc

BLUESHARK TURBO Flexible Grinding Disc has excellent shock & bending strength. Widely used on flat, concave and convex work-pieces surface polishing & finishing & grinding.

Color & Application System:
*WA (Green): Special Discs for Stainless Steel - Made of semi precious corundum and aluminum oxide.
*GC: (Brown):Special Discs for Stone and Glass.etc - Made of silicon carbide.
*AC: (Black): Special Discs for castings made of iron,steel,non-ferrous metals -- Made of Silicon Carbide and Aluminum oxide.

The discs main size is 4 / 4.5 / 5" inch and grit size 40#,60#,80#120# available. Choose correct grit size for your working also very important.

 

Blueshark Grinding Discs for Steel & Metal 180x6x22.23mm Brief Testing

Blueshark Grinding Discs for Steel & Metal 180x6x22.23mm Brief Testing 

 One of our Mexico customer sent us some samples of 180x6x22.23mm / 7x1/4x7/8 inch , those discs produced by one famous brand company in Mexico. We have done some testing and find the density really high and discs be very " Hard".  This style grinding discs little difference like us- normally our customers like the discs be little " SOFT" with very smooth & fast grinding ability and comfortable hand-feeling . This just the difference between EURO and Latin America market consume style.  

After study the samples, we have made some samples and the brief testing data as below.  We already sent the samples for our Mexico customer testing and got OK feedback.    

Below is some brief testing datas.          Find more testing videos 

   

       Before testing : 383.10g             After testing : 375.30g                 Before test : 1792.80g                    After testing : 1553.50g               

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            Grinding Time = 10 Mins                                                                Brief Testing Datas    

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Testing Discs = Blueshark Grinding Discs for Steel  180x6x22.23 mm ( 7x1/4x7/8 inch )    

Produce Time = Oct, 2013  (  made according to customers samples )
Work-picec = Carbon Steel  45#             
Powertools Data:  Bosch 180mm       

Total Testing Time : 10  Mins
Discs Weight Loss = 383.10g - 375.3g= 7.8g
Work-piece Weight Loss = 1792.80-1553.50=176.3g

G. Ratio = 176.3 / 7.8 = 22.6

S.G.Ratio = 176.3 / 10= 17.63g/min

Conclusion: High G.ration than ours normal standard also with the good hand-feelings. 

Pay attention to the shape of abrasives wheel edge wearing down!

  

Do you know?  sometimes inspect the abrasives wheels edge wearing shape can help you know well if the wheels do good job.  Normally the shape can classify to below sharp:

A. ROUND Shape - If the wheels wearing down in this shape, that's means you using the correct cutting wheels. 

B.SQUARE Shape - This shape also proved correct cutting wheels choosen and also comes from cutting works especially when cut small solids, structural shapes, pipe and tubing. 

C.CONCAVE Shape - Normal when using the correct wheel to cut tubing and thin-wall sections. 

D.POINTED Shape -  The abrasives on two-sides wearing down so fast- this indicates the wheel is too hard and most abrasives fly away by crush with the work-piece surface. 
 
E. CHISEL Shape - Wet cutting problem. Usually indicates wrong application of coolant. May cause breakage and crooked cuts. 

F. SIDE-GLAZED Shape  - Also indicates wheel is too hard or cutting too slow. Requires excessive pressure and higher power to cut. 

How to measure grinding discs performance?

For supply stable performance abrasives discs to customers, we will carry regular testing of our grinding discs everyday and below is the general way for measure our grinding discs performance:

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1) Measure the grinding discs and work-piece weight before testing ( DW1 , WW1 )

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2) Run the grinding discs grind the work-piece in a formulary time.

3) Measure the grinding discs and work-piece weight after testing ( DW2 , WW2 )

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4) Calculate the G.Ratio index.

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G.Ratio = (WW1-WW2) / (DW1-DW2)

The G.Ratio more bigger, means the grinding discs can do more grinding works. 

But G.Ratio is not the absolute index when measure the grinding discs  performance, there are also others factors such like grinding speed, hand-feeling, vibration, etc to judge the comprehensive performance of grinding discs. 

For example: A grinding discs can remove 100g work-piece in 10 minutes and itself weight consume 10g, the G.ratio=100g/10g=10,  B grinding discs can remove 200g work-piece in 10 minutes but itself weight consume 25g, the G.weight=200g/25g=8.   If only said G.ratio, seems the A is better than B, but we must see that - the B ginding discs have higher working efficence and will save your working time and labor cost. 

We can adjust our grinding discs be most suitable for your grinding applications according to customers' feedback.  Just Contact us get your best grinding solution.