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BlackLine Tools Carbide Negative Rake Inserts/Cutters

$24.00

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Product Base price with no add-on options

Tool Size

MINI

MIDI

MAXI

Cutter Type

Negative Rake S (Square) - Roughing

Negative Rake R (Round) - Shaping

Negative Rake W (Rounded Triangle) - Roughing Shaping & Finishing

Full Set of One of Each Negative Rake

Product Price with any add-on options selected

$24.00

MINI, MIDI, MAXI Carbide Negative Rake Inserts / Cutters

These inserts are designed with a 7-degree bevel angle and a 20-degree chamfer, allowing for shearing actions that result in smoother finishes, especially on challenging materials. They are available in Square, Round, and W configurations. Each insert is precision-ground and polished, ensuring high performance and extended tool life.

- W Inserts: Feature three large radius edges and three corner point cutting edges, ideal for roughing, shaping, and finishing tasks.

- S Inserts: Offer four straight edges and four corners, available with either rounded or 90-degree corners, providing flexibility for various cutting scenarios.

- R Inserts: Provide a continuous 360-degree cutting edge, optimal for shaping and smoothing operations.

Note: The W, Round, and Square inserts can be used in a shearing mode by positioning the insert at a 45-degree angle.

INSERTS / CUTTERS	MINI - mm	MIDI - mm	MAXI - mm
ROUND OD	10	16	19
SQUARE OD	9.525	12.7	16
W OD	9.525	12.7	16

INSERTS / CUTTERS	SIZE	THICKNESS	BEVEL ANGLE	NEG. RAKE
MINI	M3	3.2	7 degree	7deg / 20 chamfer
MIDI	M4	3.2	7 degree	7deg / 20 chamfer
MAXI	M5	3.2	7 degree	7deg / 20 chamfer

Transform your blanks into showstoppers with these pro-level insights. Our upgraded V2 blanks boast finer shredded plastic for ultra-smooth turning and minimal chip-out— a game-changer over V1. Dial in sharp carbide or HSS tools, crank speeds to 2,000–3,000 RPM, and take feather-light cuts (0.005–0.015 inches) to dodge melting or gummy buildup. Wet-sand from 220 to 2,000 grit, zap pin-holes with thin CA glue, and crown it with Magic Juice polish for that mirror-finish glow. Dive deeper with our guides:

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2-5 business days standard; Full Blocks take 2-3 weeks. Free Ground Shipping on $200+ orders—otherwise calculated at checkout. Unopened returns? 30 days, no sweat.

30-day unused products can be returned for full purchase price of the item. (Does not include shipping).

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BlackLine Tools Carbide Negative Rake Inserts/Cutters

$24.00

Why Customers Trust Us

Verified Provenance You Can Trust

Every eligible blank comes with a professionally designed Certificate of Authenticity, setting the industry standard for documentation and collectible value.

Craft-Ready, Maker-Approved Quality

From stabilization to cutting and finishing, each blank is meticulously prepared to deliver consistent results on the lathe and in the workshop.

Tools, Supplies & Materials—All in One Place

We offer a full ecosystem of products: HDPE molds, casting supplies, mica powders, finishing solutions, and premium turning tools—everything artisans need, from blank to final polish.

A Brand Built by Makers, for Makers

With decades of woodworking and turning expertise, we know what artisans expect—and we deliver materials and tools that elevate every project.