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General Grindstones Selection Guide Selection Method for General Grindstones for Flat Surface Grinding

Features of General Grindstones

Grindstone Types Color Features
SG Grindstones Blue It is a cutting-edge ceramic grindstone enabling high performance grinding, which can be used on anything from standard steel to alloy steel.
WA Grindstones Red It is the most standard grindstone that can be used on standard steel to general tempered steel.
32A Grindstones Gray It is a grindstone that shines with processes that need corners raised and can be used with anything from standard steel to alloy steel.
GC Grindstones Green It is a grindstone that shines when processing cemented carbides, non-ferrous metals, and non-metals.
85A Grindstones Pink It is a grindstone that shows high performance with alloy steel, tool steel, and tempered steel and can be used with anything from standard steel to alloy steel.
Z300 Grindstones Cream It is a grindstone that shines when grinding the difficult to cut SUS300 type materials.

Relation of Particle Size and Surface Roughness of General Grindstones (Reference)

Particle Size (#) Surface Roughness
#46 Use for coarse finishing grinding for rough surface finishes of about Ra 3.2 μm (Rz 12.5 μm).
#60 Use for finishing grinding for rough surface finishes of about Ra 1.6 μm (Rz 6.3 μm).
#80 Use for finishing grinding for rough surface finishes of about Ra 0.8 μm (Rz 3.2 μm).
#100 - 220 Use for precision finishing for rough surface finishes of Ra 0.2 μm (Rz 0.8 μm) or less.

Relation of Particle Size and Grinding Conditions of General Grindstones (Reference)

  Coarse #46 Title image sample Fine #220 Details
Grinding Allowance Allowance is Large Title image sample Allowance is Small If the grinding allowance is large, please choose a coarser grain size.
Work Material Clinging Materials Title image sample Brittle Materials If the work material is soft or clinging, please choose a coarser particle size.
Soft Materials Title image sample Hard Materials
Grinding Surface Finish Coarseness Coarse Finishing Title image sample Precision Finishing If the required grinding surface finish is coarse, please choose a coarser particle size.
Grindstone Contact Area Area is Large Title image sample Area is Small If the contact area of the grindstone is wide, please choose a coarser particle size.

Relation of Binding Degree and Grinding Conditions of General Grindstones (Reference)

  Soft H Title image sample K Hard Details
Work Material Brittle Materials Title image sample Clinging Materials If the work material is brittle, please choose a softer binding grindstone.
Hard Materials Title image sample Soft Materials If the work material is hard, please choose a softer binding grindstone.
Grinding Allowance Allowance is Small Title image sample Allowance is Large If the grinding portion is large, please choose a harder binding grindstone.
Grindstone Contact Area Area is Large Title image sample Area is Small If the contact area is wide, please choose a softer binding grindstone.
Grindstone Periphery Speed High Periphery Speed Title image sample Low Periphery Speed If the periphery speed is high, please choose a softer binding grindstone.
Grindstone Feeding Speed Fast Feeding Title image sample Slow Feeding If the feeding speed is fast, please choose a softer binding grindstone.
Machine Vibration Vibration is Large Title image sample Vibration is Small If machine vibration is large, please choose a softer binding grindstone.

Selection Method of General Grindstones (Reference)

Title image sample

Selection Table of General Grindstones for Flat Surface Grinding (Reference)

Mountable Grindstones Work Material SG / EKG
Grindstones		 WA Grindstones 32A Grindstones GC Grindstones
Outer Diameter x Hole Diameter Thickness Steel Type and Use Heat Treatment Y/N Finishing Degree Blue Red Gray Green
φ125 x φ12.7 13 Regular Steel Mild Steel Finish   60 K    
φ150 x φ12.7 13 Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Finish 60 / 80 K 60 / 80 K    
Cemented Carbide       120 H
16 Regular Steel Mild Steel Finish   60 K    
Cemented Carbide       120 H
φ150 x φ31.75 13 Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Finish 60 / 80 K 60 / 80 K    
φ150 x φ32 6.4 Mold Cornering Mild Steel Precision Finishing 220 K      
Mild Steel, Tempered Materials Precision Finishing 220 I / J      
φ180 x φ31.75 6.4 Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Finish 60 / 80 K 60 / 80 J
60 / 80 K		 80 K  
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Coarse Finishing 46 K      
Mild Steel, Tempered Materials Finish 60 / 80 J   60 J  
Mold Cornering Mild Steel Precision Finishing 100 - 220 K 100 / 120 K 100 K  
Mild Steel, Tempered Materials Precision Finishing 100 - 220 J
180 / 220 I		      
     
10 Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Coarse Finishing 46 K      
Finish 60 / 80 K      
Mild Steel, Tempered Materials Coarse Finishing 46 J      
Finish 60 / 80 J      
Mold Cornering Mild Steel Precision Finishing 100 / 120 K      
13 Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Coarse Finishing 46 K 46 K 46 K  
Finish 60 / 80 K 60 / 80 K    
Mild Steel, Tempered Materials Coarse Finishing 46 J 46 J 46 J  
Finish 60 / 80 J 60 / 80 J 60 J  
Tempered Materials Coarse Finishing 46 H 46 H 46 H  
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing 46 I      
Finish 60 / 80 I      
Tempered Materials Finish 60 / 80 H      
Mold Cornering Mild Steel Precision Finishing 100 / 120 K      
Mild Steel, Tempered Materials 100 J      
16 Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Coarse Finishing 46 K 46 K    
Mild Steel, Tempered Materials 46 J 46 J    
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Finish 60 / 80 K      
Mild Steel, Tempered Materials 60 J      
19 Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Coarse Finishing 46 K 46 K    
Finish 60 K 60 K    
Mild Steel, Tempered Materials Coarse Finishing 46 J 46 J    
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Finish 80 K      
Mild Steel, Tempered Materials 60 J      
φ205 x φ15.88 19 Regular Steel Mild Steel Finish   60 K    
Cemented Carbide       120 H / I
φ205 x φ19.05 19 Cemented Carbide Finish       120 H
φ205 x φ25.4 19 Regular Steel Mild Steel Finish   60 K    
Cemented Carbide Coarse Finishing       80 / 120 H
120 I
25 Cemented Carbide Finish       120 H
φ205 x φ31.75 6.4 Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Finish 60 / 80 K 60 - 100 K    
Mild Steel, Tempered Materials Coarse Finishing   60 / 80J    
Mold Cornering Mild Steel Precision Finishing 100 - 220 K      
Mild Steel, Tempered Materials 220 J      
13 Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Coarse Finishing 46 K 46 K    
Finish 60 / 80 K 60 / 80 K    
Mild Steel, Tempered Materials Coarse Finishing 46 J 46 J    
Finish 60 J 60 J    
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing 46 I      
Finish 60 / 80 I 80 J      
Tempered Materials Coarse Finishing 46 H      
Finish 60 / 80 H      
Mold Cornering Mild Steel Precision Finishing 100 / 120 K      
Mild Steel, Tempered Materials 100 / 120 J      
19 Standard Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Coarse Finishing 46 K 46 K    
Finish 60 / 80 K 60 / 80 K    
Mild Steel, Tempered Materials Coarse Finishing 46 J 46 J    
Tempered Materials 46 H 46 H    
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing 46 I      
Finish 60 / 80 I
60 / 80 J		      
Tempered Materials Finish 60 / 80 H      
Mold Cornering Mild Steel Precision Finishing 100 / 120 K      

Mountable Grindstones Work Material SG / EKG
Grindstones		 WA Grindstones 32A Grindstones GC Grindstones
Outer Diameter x Hole Diameter Thickness Steel Type and Use Heat Treatment Y/N Finishing Degree Blue Red Gray Green
φ205 x φ50.8 19 Standard Steel, Alloy Steel,
Alloy Tool Steel, Stainless Steel		 Mild Steel Coarse Finishing 46 K 46 K    
Finish 60 K 60 K    
Mild Steel, Tempered Materials Coarse Finishing 46 I / J 46 I / J 46 J  
Tempered Materials 46 H 46 H 46 H  
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel Finish 80 K      
Mild Steel, Tempered Materials 60 I / J 80 J   60 J  
Tempered Materials 60 H   60 H  
φ255 x φ19.05 25 Regular Steel Mild Steel Finish   60 / 80 K    
Cemented Carbide        
Cemented Carbide Coarse Finishing       120 H
φ255 x φ25.4 25 Regular Steel Mild Steel Coarse Finishing   46 K   80 H
Finish   60 / 80 K    
Cemented Carbide Coarse Finishing       80 - 120 H
80 / 120 I
φ255 x φ50.8 25 Regular Steel Mild Steel Coarse Finishing   46 H / J    
Finish   60 J / K    
φ305 x φ25.4 25 Regular Steel Mild Steel Finish   60 K    
Cemented Carbide Coarse Finishing       80 / 120 H
32 Regular Steel Mild Steel Finish   60 / 80 K    
Cemented Carbide Coarse Finishing       80 - 120 H
80 / 120 I
38 Cemented Carbide Finish       120 H
φ305 x φ76.2 25 Regular Steel Mild Steel Finish   60 K    
Mild Steel, Tempered Materials Coarse Finishing   46 J    
Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Tempered Materials Coarse Finishing 46 I / J   46 H  
32 Regular Steel Mild Steel Coarse Finishing   46 K    
Finish   60 K    
Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing   46 J 46 I / J  
Finish     60 I / J 80 J  
Tempered Materials Coarse Finishing 46 I / J   46 H  
38 Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing     46 H  
φ305 x φ127 25 Regular Steel Mild Steel Finish   60 / 80 K    
Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Tempered Materials 60 G / J      
32 Regular Steel Mild Steel Coarse Finishing   46 K    
Finish   60 K    
Mild Steel, Tempered Materials Coarse Finishing   46 J    
Finish   60 J    
Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Tempered Materials Coarse Finishing 46 J   46 H  
38 Regular Steel Mild Steel Finish   60 / 80 K    
Mild Steel, Tempered Materials Finish   60 J    
Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing   46 J 46 J  
Tempered Materials Coarse Finishing   46 H 46 H  
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing 46 H / I      
Finish 80 H / J      
Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Finish     60 H  
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Finish 60 I      
Tempered Materials 60 H      
φ355 x φ31.75 38 Cemented Carbide Finish       100 / 120 H
120 H
50 Cemented Carbide Finish
Coarse Finishing       80 H
φ355 x φ38 38 Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing 46 G / H / I      
Finish 60 J      
φ355 x φ50 50 Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing 46 I      
Finish 60 J      
φ355 x φ76.2 38 Regular Steel Mild Steel Finish   60 K    
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Tempered Materials 60 H      
φ355 x φ127 38 Regular Steel Mild Steel Finish   60 K    
Coarse Finishing   46 K    
Mild Steel, Tempered Materials Coarse Finishing   46 J    
Finish   60 J    
Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Tempered Materials Coarse Finishing 46 G 46 H 46 H  
Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Finish 60 I      
Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing 46 H / I   46 I / J  
Finish 10 H / J   60 H / I  
50 Regular Steel Mild Steel Finish   60 J / K 80 K 46 J  
Coarse Finishing   46 J    
Regular Steel, Alloy Steel, Alloy Tool Steel,
Stainless Steel		 Mild Steel, Tempered Materials Coarse Finishing 46 I 60 J   46 H / J  
Finish     60 H / J  

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