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Rectangular HSS M2 tool bit, silver metal finish, 851 model

Cleveland

Cleveland C44637 HSS M2 Rectangular Tool Bit 851 3/8 x 3/4 in x 4 in

SKU CH-00YJ-Z0DD6

High-speed steel rectangular tool bit for lathe work, 3/8 in wide by 3/4 in high by 4 in long, right- and left-hand non-beveled blank

  • High-speed steel holds a sharp edge longer
  • Rectangular blank suits right- or left-hand turning
  • 3/8 in width fits compact tool holders
  • 3/4 in height adds rigidity for heavy cuts
  • 4 in overall length gives ample reach

Cleveland HSS M2 Rectangular Tool Bit 851

This Cleveland tool bit is a high-speed steel blank designed for lathe turning operations. The M2 grade steel provides the hardness and wear resistance needed for general-purpose machining of ferrous and non-ferrous materials. It is intended for machinists and toolmakers who grind their own cutting geometries.

Replaces worn or damaged lathe tool blanks

The jump is worth it when an existing blank has worn down past its usable grinding allowance or when a specific M2 grade is required for the workpiece material. It serves as direct replacement stock for standard tool holders accepting rectangular sections. Buyers needing pre-ground cutting edges or carbide-tipped tooling will not find that here.

Limited by rectangular blank dimensions

The 3/8 by 3/4 inch cross-section and 4 inch overall length define the maximum tool geometry that can be ground from this blank. High-speed steel requires proper grinding technique to avoid overheating and loss of temper. It is not suited for high-volume production runs where carbide inserts offer longer tool life.

How it compares

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

Price $36.99
Pricier than about 59% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND

Questions about this item

What are the exact dimensions of the Cleveland C44637 tool bit?

The tool bit measures 3/8 inch wide by 3/4 inch high and 4 inches long with a rectangular, non-beveled profile.

How do I secure this rectangular HSS blank in my lathe tool holder?

Clamp the flat faces firmly in a standard tool post or quick-change holder; the common mistake is tightening on the narrow edges, which lets the bit shift under load.

When the tip dulls, can I resharpen this M2 high-speed steel bit myself?

Yes, grind the end to your required geometry on a bench grinder or belt sander, keeping the tool cool to preserve the M2 temper.

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