1/4X3/8 CO 2FL SE BN OSG
BN End Mill; 1/4″ Dia. × 5/8″ LOC × 3/8″ Shank Dia. × 2-7/16″ OAL ; 2 FL ; HSSCo ; Uncoated ; Series 521

| Cutting Diameter (DC) | 1/4″ | Corner Radius (RE) | 1/8″ |
| Connection Diameter Machine Side (DCONMS) | 3/8″ | Tool Type | Single-End |
| Depth of Cut Maximum (APMX) | 5/8″ | Length Group | Standard |
| Overall Length (OAL) | 2-7/16″ | End Shape | Ball Nose |
| Cutting Edge Material | HSSCo | Coolant Supply Property (CSP) | External |
| Coating | Uncoated | Style | Center Cutting |
| Flute Count (NOF) | 2 | Decimal Equivalent | 0.25″ |
| Shank Type | Round | Measurement Type | Inch |
| Usable Length (LU) | 5/8″ | Series/List # | 521 |
Product Features
| Remarks | •M-42 Cobalt 2-Flute, Ball End
•Single End Mills 
• Center Cutting
•M–42 8% Cobalt Steel for the tougher cutting assignments on high-strength, high-temperature steels and exotic materials or extended production runs. | Country of Origin | Japan |
Shipping Info
Package Length
2.50000
Package Width
.65000
Package Height
.60000
Package Weight
0.07
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