Products for bench top machinists | LittleMachineShop.com

Insert, TPMW-1.81.51 HSS

Insert, TPMW-1.81.51 HSS - Main image
$9.21 $13.95 In stock

TPMW-1.81.51 insert made from T-15 high speed steel, combine the advantages of high-speed steel cutting tools with the convenience of indexable tooling.

Insert is a 60° triangle with a 11° relief. The center hole is a 40°-60° single countersink, and there is no chip breaker.

It has an inscribed circle (IC) of 0.21875" (7/32"), a thickness of 0.094" (3/32"), and a corner (nose) radius of 0.0156" (1/64").

The insert is designated TPMW1.81.51 (ANSI) or TPMW090202 HSS (ISO). 

This high-quality insert is made in America by the Arthur R Warner company.

Inserts are sold individually—no need to buy a pack of 10 inserts.

*NOTE: Make sure you get the correct inserts and retaining screws for your indexable turning tools. Our chart of indexable inserts shows which inserts and which screw to use with each of our indexable tools.

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Customer Reviews (4.8 / 5 · 5 reviews)

Jason ★★★★★

The 11-degree relief on these triangular inserts makes a visible difference in chip flow during light finishing passes. I've swapped out a few different carbide grades to test, but the T-15 steel here holds an edge noticeably longer in my small lathe.

Sebastian K. ★★★★★

T-15 steel means these inserts take a real beating—I've run them at higher feeds than I'd try with carbide and they just keep cutting. The 60° triangle geometry seats firmly in the holder with that 11° relief doing its job on cleanup passes.

Zoe ★★★★★

The 60° triangle with an 11° relief sits really solidly in the holder, so it doesn't chatter on light cuts. I grabbed a pack for a quick job and the T-15 steel held its edge longer than I expected before I flipped to a fresh corner.