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Silver 12 mm HSS end mill, four flutes, Weldon flat shank

Cleveland

Cleveland C75100 4-Flute HSS Center Cutting Square Single End Mill 12 mm

SKU CH-SNZC-6X0QG

12 mm high-speed steel square end mill with four flutes, 31.75 mm cut length and 12.7 mm Weldon shank for general milling

  • Product typeMilling
  • 4-flute design improves chip evacuation for smoother milling
  • High-speed steel construction resists wear during extended cutting sessions
  • Centre-cutting geometry allows plunge cuts without pre-drilling
  • 12 mm diameter with 31.75 mm cut length suits medium-depth slots
  • Weldon flat on 12.7 mm shank prevents tool slippage in holders

12 mm HSS Center-Cutting End Mill

This 12 mm square end mill is made from high-speed steel and features four flutes with center-cutting geometry. The uncoated tool uses a Weldon flat on a 12.7 mm shank for secure holding in standard toolholders. It suits general-purpose milling in ferrous and non-ferrous materials where coated tools are not required.

Practical limits of HSS and uncoated finish

High-speed steel offers good toughness but lower hot hardness than carbide, so cutting speeds must stay moderate to avoid rapid wear. The uncoated surface provides no thermal barrier, limiting performance in high-heat alloys or extended dry cuts. Coolant or air blast is recommended to manage temperature and evacuate chips from the 31.75 mm length of cut.

Replaces worn or undersized HSS end mills

This tool directly substitutes a dull or damaged 12 mm HSS end mill with the same shank and flute count. The jump is worthwhile when the previous cutter loses edge retention or when a center-cutting capability is needed for plunge entry. It does not address needs for higher metal-removal rates that demand carbide substrates or advanced coatings.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $22.99
Cheaper than about 58% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeMilling

Questions about this item

Should I choose the 12 mm or 12.7 mm diameter for my milling work?

The cutting diameter is 12 mm; the 12.7 mm figure is the Weldon shank size that fits the holder.

What does the 31.75 mm length of cut mean when the tool is in the spindle?

You can plunge or profile up to 31.75 mm deep in a single pass without the shank contacting the workpiece.

How does the Weldon flat on the 12.7 mm shank affect tool holding?

The flat allows a set-screw holder to clamp securely, preventing pull-out during heavy cuts.

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