OSG Ball End Mill: Cobalt, 2 Flute, 5/16" Mill Dia, 3/4" LOC, 3-5/16" OAL (MPN 5260400)
SKU 3G-OTH-277984
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Frequently Asked Questions
What is the OSG 5260400 ball end mill used for?
The OSG 5260400 is a reduced-neck cobalt ball end mill used for contouring, 3D profiling, and die/mold machining. Its ball nose design creates smooth curved surfaces in hardened steels and exotic alloys. Common in aerospace, automotive, and tool-and-die shops requiring precision radii and fine finishes.
What are the specifications of the OSG 5260400 ball end mill?
The OSG 5260400 is a 2-flute, cobalt ball end mill with a 5/16" mill diameter, 3/4" length of cut, and 3-5/16" overall length. It features a reduced-neck design for deep cavity machining. The manufacturer part number is 5260400. OSG is the OEM brand.
Where to buy the OSG 5260400 ball end mill worldwide?
3G Electric supplies the OSG 5260400 ball end mill worldwide. As a global industrial distributor since 1990, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time. We source and deliver this OSG cobalt end mill to any country.
How to select the correct OSG ball end mill for your application?
Select based on material hardness, required finish, and depth of cut. For hardened steels, use cobalt or carbide grades. Match flute count to material: 2-flute for softer materials, 4-flute for harder. The reduced neck on the 5260400 allows deeper reach without deflection. Consult OSG's speed/feed recommendations for optimal tool life.
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3G Electric supplies OSG reduced-neck cobalt ball end mills. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.













