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                          Long Series Type B230T.
Used for diesinking, slot milling and profile milling. Bright finish. Flute type: 30 helix. Manufactured to BS 122 : Part 4 : 1980.
Metric Tolerances:
Diameter:  ~ up to 3.00. Tolerance: +0.013 -0.033;
Diameter: Over 3.00 ~ up to 6.00. Tolerance:+ 0.020 -0.038;
Diameter: Over 6.00 ~ up to 10.00. Tolerance: +0.025 -0.046;
Diameter: Over 10.00 ~ up to 18.00. Tolerance: +0.033 -0.058;
Diameter: Over 18.00 ~ up to 30.00. Tolerance: +0.041 -0.071;
Diameter: Over 30.00 ~ . Tolerance: + 0.051 -0.089.
                        
| Number of Flutes | 2 | 
| Flute Length | 31.5mm | 
| Plunge Type | Non-centre Cutting | 
| Overall Length | 108.0mm | 
| System of Measurement | Metric | 
| Standards Met | BS 122 | 
| Cutter Style | Ball Nose | 
| Shank Diameter | 16.0mm | 
| Shank Type | Threaded | 
| Product Type | Slot Drills | 
| Cutter Diameter | 15.0mm | 
| Material | HSS | 
| End Mill Type | Slot Drill | 
| Coolant Delivery | External | 
| Milling Cutter Type | Slot Drill | 
| Finish/Coating | Uncoated | 
| Cutting Direction | Right Hand | 
| Milling Application | Diesinking | Profiling | Slotting | 
| Series | Long | 
| Helix Angle | 30\u00b0 | 
| Flute Type | Helical | 
| Length Type | Long | 
| Material Grade | M2 | 
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