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General Grindstones Selection Guide for Flat Surface Grinding

Features of General Grindstones

Grinding Stone
Grindstone Types Color Features
Grinding Stone SG Blueหินเจียร SG It is a cutting-edge ceramic grindstone enabling high performance grinding, which can be used on anything from standard steel to alloy steel.
Grinding Stone WA Redหินเจียร WA It is the most standard grindstone that can be used on standard steel to general tempered steel.
Grinding Stone 32A Grayหินเจียร 32A It is a grindstone that shines with processes that need corners raised and can be used with anything from standard steel to alloy steel.
Grinding Stone GC Greenหินเจียร GC It is a grindstone that shines when processing cemented carbides, non-ferrous metals, and non-metals.
Grinding Stone 85A Pinkหินเจียร 85A 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.
Grinding Stone Z300 Creamหินเจียร Z300 It is a grindstone that shines when grinding the difficult to cut SUS300 type materials.

The relationship betwen particle size and surface roughness of general Grindstones (for 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 ~ 200 Use for precision finishing for rough surface finishes of Ra 0.2 μm (Rz 0.8 μm) or less.

The relationship betwen particle size and the grinding conditions of general Grindstones (for reference)

Rough number # 46 Grinding Grade Detailed number # 220 Description
Grinding allowance Allowance is Large Grinding Grade Allowance is Small If the grinding allowance is large, please choose a coarser grain size.
Work Material Clinging Materials Grinding Grade Brittle material If the material is soft or sticky Should choose a stone number that is more rough
Soft material Grinding Grade Hard material
Grinding Surface Finish Coarseness Coarse Finishing Grinding Grade Precision Finishing If the required grinding surface finish is coarse, please choose a coarser particle size.
Grindstone Contact Area Area is Large Grinding Grade Area is Small If the surface area of the grinding stone is wide Should choose a stone number that is more rough

The relationship between binding degree and grinding conditions of Grindstones (for reference)

Soft grade H Grinding Grade Solid grade K Description
Materials used Brittle materials Grinding Grade Clinging materials If the work material is brittle, please choose a softer binding grindstone.
Hard materials Grinding Grade Soft materials If the work material is hard, please choose a softer binding grindstone.
Grinding allowance Allowance is small Grinding Grade Allowance is large If the grinding portion is large, please choose a harder binding grindstone.
Grindstone Contact Area Area is large Grinding Grade Area is small If the contact area is wide, please choose a softer binding grindstone.
Grindstone Periphery Speed High Periphery Speed Grinding Grade Low Periphery Speed If the periphery speed is high, please choose a softer binding grindstone.
Grindstone Feeding Speed Fast Feeding Grinding Grade Slow Feeding If the feeding speed is fast, please choose a softer binding grindstone.
Machine Vibration Vibration is Large Grinding Grade Vibration is Small If machine vibration is large, please choose a softer binding grindstone.

Selection Method of General Grindstones (Reference)

ความสัมพันธ์ระหว่างเกรดของหินเจียรกับเงื่อนไขในการเจียรของหินเจียรทั่วไป

Refer to the "Selection Table of General Grindstones for Grinding Flat Surfaces
(Please use it for reference only)

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
×
Hole Diameter
Thickness Steel Type and Use Heat Treatment Y/N Finishing Degree Blue
หินเจียร SG
Red
หินเจียร WA
Gray
หินเจียร 32A
Green
หินเจียร GC
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 J 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
     
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 / 80 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 Coarse Finishing       120 H
φ205 x φ31.75 6.4 Alloy Steel,
Alloy Tool Steel,
Stainless Steel
Mild Steel Finish 60 / 80 K 60 ~100K    
Mild Steel
Tempered Materials
Coarse Finishing   60 / 80 J    
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 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    
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
×
Hole Diameter
Thickness Steel Type and Use Heat Treatment Y/N Finishing Degree Blue
หินเจียร SG
Red
หินเจียร WA
Gray
หินเจียร 32A
Green
หินเจียร GC
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
φ225 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
φ225 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  

Recommendation Grindstone products for flat surface grinding

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