Products for bench top machinists | LittleMachineShop.com

Insert, CCMW-21.51 HSS

Insert, CCMW-21.51 HSS - Main image
$8.94 $12.95 In stock

CCMW-21.51 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 80° diamond with a 7° relief. The center hole is a 40°-60° single countersink, and there is no chip breaker.

It has an inscribed circle (IC) of 0.25" (1/4"), a thickness of 0.094" (3/32"), and a corner (nose) radius of 0.0156" (1/64").

The insert is designated CCMW21.51 (ANSI) or CCMW060204 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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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Ava E. ★★★★★

Used this CCMW-21.51 insert today for a finishing pass on mild steel and the 7° relief cleared chips beautifully. The T-15 steel holds an edge noticeably longer than my usual M2 bits, even in interrupted cuts.

Lily L. ★★★★★

Tried this in my lathe for some light profiling and the T-15 steel really holds an edge longer than the standard carbide I’ve been using. The 7° relief cuts clean without much chatter, and the 80° diamond geometry makes indexing quick. Pleasantly surprised how well it performs for the price.

Violet ★★★★★

The 80° diamond shape sits nicely in the holder, and the 7° relief cuts cleanly on brass without chattering. I've pushed it through some tough steel and the T-15 edge still holds up surprisingly well.