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OSG Roughing End Mill: Cobalt, 3 Flute, Fine Pitch, 5/16" Mill Dia, 3/4" LOC - General Purpose Cobalt Roughing End Mills
OSGGeneral Purpose Cobalt Roughing End Mills

OSG Roughing End Mill: Cobalt, 3 Flute, Fine Pitch, 5/16" Mill Dia, 3/4" LOC

The OSG Roughing End Mill is a general-purpose cobalt roughing end mill with a 5/16" mill diameter, 3/4" length of cut, and 2-1/2" overall length. It features a fine pitch and 3 flutes (MPN 4509400). 3G Electric…

SKU 3G-OTH-269168

Brand
OSG
Item
Roughing End Mill: Cobalt, 3 Flute, Fine Pitch, 5/16" Mill Dia, 3/4" LOC
Category
General Purpose Cobalt Roughing End Mills
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Local availability & support

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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

OSG
Manufacturer Part Number
4509400
Type
Fine Pitch
Mill Dia
5/16"
OAL
2-1/2"
Flute
3
LOC
3/4"

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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Roughing End Mill is a general-purpose cobalt roughing end mill with a 5/16" mill diameter, 3/4" length of cut, and 2-1/2" overall length. It features a fine pitch and 3 flutes (MPN 4509400). 3G Electric interprets demand and delivers this genuine industrial cutting tool across 14 departments — with specialist depth in machining — ensuring you get the right answer, not just a catalog.

Frequently Asked Questions

What is OSG 4509400 roughing end mill used for?

The OSG 4509400 is a general-purpose cobalt roughing end mill used for aggressive material removal in machining operations. Its fine-pitch design and 3-flute geometry make it suitable for roughing ferrous metals, stainless steels, and high-temperature alloys in industrial manufacturing.

What are the specifications of OSG 4509400 roughing end mill?

The OSG 4509400 roughing end mill has a 5/16" mill diameter, 3/4" length of cut (LOC), 2-1/2" overall length (OAL), 3 flutes, and fine-pitch tooth configuration. It is made from cobalt high-speed steel for heat resistance and durability in roughing applications.

Where to buy OSG 4509400 roughing end mill worldwide?

3G Electric supplies the OSG 4509400 roughing end mill worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on this cobalt end mill.

How to select the right roughing end mill for steel?

For roughing steel, choose a cobalt or carbide end mill with fine pitch for chip evacuation and heat resistance. Match flute count to material hardness—3 flutes balance chip clearance and rigidity. Ensure shank diameter fits your collet and length of cut exceeds your depth of cut.

Used in

Common applications for OSG
Automotive engine block production — OSG micro drill bits for oil gallery and coolant passage drilling in cast iron
Medical device manufacturing — OSG micro drill bits for drilling bone screw pilot holes in stainless steel implants
Aerospace component machining — OSG micro drill bits for fastener holes in titanium alloy structural parts
Mold and die making — OSG micro drill bits for cooling channel drilling in hardened tool steel (HRC 45-50)
Electronics enclosure fabrication — OSG micro drill bits for precision holes in aluminum alloy housings (with appropriate coating selection)
General engineering job shops — OSG micro drill bits for small-diameter hole drilling in mild steel and alloy steel parts

OSG Products

3G Electric supplies OSG general purpose cobalt roughing end mills. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Cobalt roughing end mill with TiAlN coating, fine pitch, and 4 flutes. Mill diameter 5/16", length of cut 1-3/8". Designed for aggressive material removal in roughing passes on ferrous metals, stainless steels, and high-temperature alloys
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