Unique-Bargains
Unique-Bargains 5/16" HSS End Mill 4 Flute 7.9mm 65mm
Four-flute HSS end mill with 7.9 mm cutting diameter, 22 mm cutting depth and 65 mm overall length for milling steps, recesses and vertical surfaces
- 4-flute design produces smoother finishes on milled steps and recesses
- HSS construction resists wear when cutting vertical plane surfaces
- 9 mm cutting diameter matches shank for rigid, vibration-free operation
- 22 mm cutting depth handles deeper pockets in a single pass
- 27 g lightweight tool reduces spindle load on milling machines
End Mill for Milling Machines
The Unique-Bargains HSS end mill is a 4-flute cutting tool with a 7.9 mm diameter and 65 mm total length. It is designed for machinists and workshops that use milling machines or machine tools for general milling operations.
Straight Shank and Helical Groove
The straight shank matches the 7.9 mm cutting diameter, allowing direct fit into compatible tool holders without an adapter. The helical groove geometry improves chip evacuation when milling steps, recesses and vertical plane surfaces.
Limits of HSS Tooling
High-speed steel construction provides toughness for interrupted cuts but wears faster than carbide at high speeds. The 22 mm cutting depth restricts the tool to shallow features unless multiple passes are taken.
Not for High-Volume Production
Buyers who need extended tool life in abrasive materials or who require deeper single-pass cuts should evaluate carbide alternatives that are not included in this listing.
Highlights
- 4-flute design produces smoother finishes on milled steps and recesses
- HSS construction resists wear when cutting vertical plane surfaces
- 9 mm cutting diameter matches shank for rigid, vibration-free operation
- 22 mm cutting depth handles deeper pockets in a single pass
- 27 g lightweight tool reduces spindle load on milling machines
Specifications
| Brand | Unique Bargains |
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Questions about this item
When should I replace the 4-flute HSS end mill?
Replace it when the helical grooves show visible wear, chipping on the 7.9 mm cutting edges, or when surface finish on steps and recesses degrades noticeably.
What limits continuous milling with the 22 mm cutting depth?
Heat buildup in the HSS flutes during deep slots forces reduced feed rates or pauses to prevent loss of hardness on the 5/16 inch diameter.
How hot does the 65 mm shank get during all-day steel milling?
The 27 g HSS body conducts heat rapidly into the collet; the shank becomes too hot to touch within minutes without flood coolant.
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