Cleveland
Cleveland C38964 2-Flute HSS Keyway Tolerance Square Single End Mill
High-speed steel end mill with TiCN coating for keyway milling in steel and ferrous alloys
- TypeMilling
- 2-flute design clears chips efficiently in keyways
- HSS construction resists wear during extended cutting sessions
- TiCN coating reduces friction and extends tool life
- Center-cutting geometry allows plunge cuts without pre-drilling
- Keyway tolerance ensures precise slot dimensions every time
Cleveland 2-Flute HSS Keyway End Mill
The Cleveland C38964 is a high-speed steel square end mill built for keyway tolerance milling. Its two-flute center-cutting design suits machinists and maintenance teams cutting precise slots in ferrous materials.
TiCN coating and inch shank implications
A TiCN coating increases surface hardness and reduces friction during prolonged cuts. The inch-based shank fits standard tool holders directly, so setup time stays short on manual or CNC knee mills without adapter sleeves.
Practical limits of HSS tooling
High-speed steel wears faster than carbide on abrasive alloys or high-speed production runs. The two-flute geometry limits chip evacuation in deep pockets, so aggressive feed rates in sticky materials can lead to clogging or premature edge breakdown.
Highlights
- 2-flute design clears chips efficiently in keyways
- HSS construction resists wear during extended cutting sessions
- TiCN coating reduces friction and extends tool life
- Center-cutting geometry allows plunge cuts without pre-drilling
- Keyway tolerance ensures precise slot dimensions every time
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Milling |
Questions about this item
What shank diameter does the 3/8 in milling diameter end mill use for tool-holder fit?
The 3/8 in milling diameter typically pairs with a 3/8 in shank, so it fits standard 3/8 in collets or end-mill holders without a reducing sleeve.
What physical clearance does the 9/16 in length of cut require inside the workpiece?
The 9/16 in length of cut needs at least 9/16 in of open depth in the slot or pocket, plus extra clearance for chip evacuation and tool overhang.
How is the TiCN-coated HSS end mill installed in a milling machine, and what step is often missed?
Secure the 3/8 in shank in a matched collet or end-mill holder, torque to the holder spec, then verify the 9/16 in flute length clears the fixture — operators often skip the clearance check.
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