Cleveland
Cleveland HSS M2 Rectangular Tool Bit 851 3/8x1/2x4 in
High-speed steel rectangular tool bit for lathe work, 3/8 by 1/2 inch cross-section and four inches long, right- or left-hand non-beveled blank
- High-speed steel construction retains edge during heavy cutting
- Rectangular 3/8 × 1/2 in profile fits standard tool holders
- Four-inch overall length provides extended reach on lathe
- Symmetrical right-and-left-hand design allows versatile grinding
- Model 851 identifies the exact blank for reordering
Rectangular HSS Tool Bit 851
This Cleveland high-speed steel blank is ground to a 3/8 by 1/2 inch rectangular cross-section and measures 4 inches overall. It serves machinists and maintenance technicians who grind custom lathe tools for turning, facing or threading operations. The non-beveled geometry allows the user to shape any relief or rake angle required by the workpiece material. It is not suited for applications that demand pre-ground cutting geometry or indexable inserts.
Capacity and headroom for custom grinding
The 4-inch length provides enough shank engagement for standard tool holders while leaving ample material for repeated regrinds over the tool’s service life. High-speed steel M2 composition retains hardness at elevated cutting temperatures encountered in mild steel, cast iron and non-ferrous alloys. The blank will not satisfy users who need carbide wear resistance for high-volume production or exotic alloys that exceed HSS temperature limits.
No accessories alter the blank
The item ships as a single unground rectangular bar without coatings, handles, holders or grinding jigs. All cutting geometry must be produced by the end user on a bench grinder or tool-room grinder. There is no bundled software, documentation or sharpening guide that changes the preparation workflow. Buyers who want ready-to-cut tooling must look elsewhere.
Highlights
- High-speed steel construction retains edge during heavy cutting
- Rectangular 3/8 × 1/2 in profile fits standard tool holders
- Four-inch overall length provides extended reach on lathe
- Symmetrical right-and-left-hand design allows versatile grinding
- Model 851 identifies the exact blank for reordering
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
Will the 3/8 by 1/2 inch shank of tool bit 851 fit the tool post on my older lathe?
The bit is a rectangular blank measuring 3/8 inch wide by 1/2 inch high, so it will fit any tool post that accepts those cross-section dimensions.
How can I confirm the high-speed steel blank is ready for cutting after I grind it?
After grinding the cutting geometry, a sharp edge that produces clean chips without chatter in a test cut shows the M2 high-speed steel is performing correctly.
Does the package include a pre-ground cutter or just the 4 inch rectangular blank?
Only the 4 inch long rectangular HSS M2 blank is supplied; no pre-ground tool, holder or grinding wheel is included.
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