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Cylindrical cobalt roughing end mill, uncoated silver finish, four flutes, Weldon flat shank

Cleveland

Cleveland C30833 Roughing End Mill, Cobalt, 0.625 in, 4 FL

SKU CH-5690-DEBX3

A 5/8-inch cobalt roughing end mill with a 1.625-inch cut length and four flutes for heavy material removal

  • TypeMilling
  • Cobalt construction resists wear during heavy cuts
  • Four-flute design clears chips efficiently in roughing passes
  • 625 in diameter suits medium-sized milling tasks
  • 625 in length of cut enables deep material removal
  • Weldon flat shank prevents tool slippage in holder

Cleveland C30833 Cobalt Roughing End Mill

This Cleveland C30833 roughing end mill is built for machinists removing heavy stock in steel or stainless alloys. The 0.625 inch diameter and four-flute cobalt construction handle aggressive feed rates without premature wear. It suits CNC milling and manual operations where rapid material removal matters more than finish quality.

Uncoated cobalt thermals and cutting behaviour

The uncoated cobalt substrate manages heat through material mass rather than surface treatment. Chip evacuation across four flutes reduces re-cutting friction during deep slotting at 1.625 inch length of cut. Power draw on the spindle stays predictable because the roughing profile breaks chips into manageable segments.

Weldon flat shank and workshop implications

A 5/8 inch Weldon flat shank locks securely into standard end-mill holders without collets or set-screw marring. The 3 3/4 inch overall length fits most tool changers and manual tool posts without overhang issues. Buyers needing coolant-through capability or a necked design for deep cavities must select a different tool.

Highlights

  • Cobalt construction resists wear during heavy cuts
  • Four-flute design clears chips efficiently in roughing passes
  • 625 in diameter suits medium-sized milling tasks
  • 625 in length of cut enables deep material removal
  • Weldon flat shank prevents tool slippage in holder

Specifications

BrandCLEVELAND
TypeMilling

Questions about this item

How do I install the 0.625 in roughing end mill and which step is often missed?

Insert the 5/8 in shank with its Weldon flat fully into the holder and tighten the set screw directly on the flat; the step often missed is aligning the flat perfectly before locking it.

What maintenance or replacement will the cobalt roughing end mill need later?

The uncoated cobalt flutes will dull with use; plan to resharpen or replace the cutter when edge wear reduces chip clearance or surface finish degrades.

What limit appears first during sustained cutting with this 1.625 in length of cut tool?

Heat buildup in the uncoated cobalt flutes typically limits sustained cuts before deflection becomes critical at the 3 3/4 in overall length.

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