What Gorilla Mill does

Gorilla Mill, legally operating as Carbide Grinding Co., Inc., is a private, family-owned manufacturer of carbide cutting tools and end mills founded in 1974 in Waukesha, Wisconsin. The company designs and produces a broad portfolio of end mills, knuckle roughers, rougher/finishers, chip breakers, high-feed endmills, threadmills, die/mold 3D surfacing end mills, chamfer mills, Picatinny form cutters, and drills, organized under 16+ brand families (Silverback, Neanderthal, Phenom, Sasquatch, Kong, Baboon, Howler, Yeti, Gorilla Drill, Die/Mold Chimps, etc.) and segmented by performance tier and material type. Its technical differentiation rests on proprietary coatings — MF (ultra-thin ta-C carbon-based, >65 GPa hardness, rated to 600°C), WTF, GMS², and ZrN — combined with specialized geometries and flute counts up to 9.

The business runs an exclusively distributor-mediated go-to-market model with 300+ distributors worldwide; end users cannot purchase directly, and the company supplements this channel with a custom Build-a-Tool configurator, online speeds-and-feeds calculators, the Gorilla Mill Machinist Pro AF mobile application, same-day shipping on most orders, and a re-sharpening/reconditioning/recoating service stream. Marketing targets industrial CNC machinists in aerospace and defense, non-ferrous machining, and general industrial applications through an irreverent, American-made brand identity anchored by the registered 'Weapons of Mass Production' trademark (2005). Customers include Boeing Corporation — whose 2015 Industry Challenge II test the Gorilla Mill Phenom won so decisively that Phase 3 was canceled — alongside unnamed 'various national companies.'

Under third-generation family ownership following Nathan Cranker's November 2025 transition, the company is executing a Plant Two expansion on a 5-acre Waukesha site in parallel with ongoing coating-technology development, reflecting a bootstrapped, capital-efficient growth posture from a $1.25M (2003) to over $20M annual revenue base with 51-100 employees.

Name

Gorilla Mill

Legal name

Carbide Grinding Co., Inc.

Website

https://gorillamill.com

Company type

Private

Founded year

1974

Operating status

Operating

Headcount range

51–100 employees

Short description

Gorilla Mill (Carbide Grinding Co., Inc.) is a private, family-owned Waukesha, Wisconsin manufacturer of carbide end mills and cutting tools sold exclusively through 300+ distributors worldwide, serving CNC machinists in aerospace, defense, firearms, and industrial manufacturing with proprietary coating technologies.

Ownership category

akta.pro rank

Product category

Industrial Cutting Tools

NAICS

Cutting Tool and Machine Tool Accessory Manufacturing (333515)

SIC

Machine Tools, Metal Cutting Types (3541), Metalworkg Machinery & Equipment (3540)

akta.pro primary industry

Metal Cutting Tools, Tooling & Workholding (Cutters, Inserts, Chucks, Fixtures) (IMAHADAB)

Keywords

• Carbide cutting tools
• End mill manufacturing
• CNC machining tools
• Cutting tool coatings
• Custom tool building

Headquarters

HQ city

Waukesha

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Personnel, Supply Chain, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Cutting Tools Sales: Sale of carbide end mills and cutting tools through distributor network. Products available in various configurations (coatings, flute counts, sizes) with prices ranging from approximately $30 to $800+ depending on specifications.
2. Reconditioning Services: Re-sharpening, regrinding, reconditioning and recoating services for existing tools to extend tool life.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Gorilla Mill manufactures carbide cutting tools (end mills, drills, knuckle roughers, threadmills, chamfer mills, high-feed and 3D surfacing end mills) and sells them exclusively through a global network of 300+ industrial distributors. The company also offers proprietary coatings (MF, WTF, GMS², ZrN) applied in-house, custom tool building (Build a Tool), and Reconditioning Services that re-sharpen, regrind, and recoat existing tools. A free Gorilla Mill Machinist Pro AF mobile app supports machinists with speeds-and-feeds calculations.

Product overview

Gorilla Mill is a manufacturer of carbide cutting tools and end mills headquartered in Waukesha, Wisconsin, founded in 1974. The company offers a comprehensive portfolio of cutting tool product lines under various brand families (Silverback, Neanderthal, Phenom, Sasquatch, Kong, Baboon, Howler, Yeti, Gorilla Mill, Gorilla Drill, Arsenal, Knuckledraggers, Lemur, Missing Link, Primates, Die/Mold Chimps), available in multiple coatings (GMS², WTF, MF, ZrN) and configurations (square end, ballnose, radius end). Products are categorized by performance level (Super Bitchin' Performance, High Performance, Standard Performance) and material type (Aluminum & Non-ferrous, Ferrous). The company also provides the Gorilla Mill Machinist Pro AF mobile application for speeds and feeds calculations, custom tool building services, and reconditioning/re-sharpening services. Products are sold through over 300 distributors worldwide.

Differentiator

Problem solved

Functional benefit

Brands

• Gorilla Drill: Cutting tool brand for drill products under the Gorilla Mill family.
• Arsenal
• Baboon
• Die/Mold Chimps
• Howler
• Knuckledraggers
• Kong
• Lemur
• Missing Link
• Neanderthal
• Phenom
• Primates
• Sasquatch
• Silverback
• Yeti

Products and services

• Silverback End Mills Three-flute (and two-flute) end mill line in square-end, ballnose, and radius-end configurations, offered in MF coating, ZrN coating, and uncoated options. Engineered to repel aluminum at high velocity with high material removal rate, available in standard and Chimpbreaker and Knuckle Dragger variants.
• Phenom End Mills High-performance end mill line designed for difficult-to-machine aerospace materials. The Gorilla Mill Phenom outperformed all competitors at Boeing's Industry Challenge II in cutting 6AL4V titanium at the University of Sheffield AMRC in 2015, leading Boeing to cancel Phase 3 of the high-velocity test. Also available in a Phenom Chimpbreaker chip-breaking variant.
• 9 Flute Neanderthal End Mills High-efficiency finishing and dynamic milling end mill line with 9 flutes, available with WTF coating for high hardness, copper color, and improved tool life in difficult-to-machine materials. Fully resharpenable; example price points include the GMHT12RLH9030WTF at $197.32 and GMHT12F9WTF at $149.61.
• Kong End Mills High-performance cutting tool line in the Super Bitchin' Performance category for demanding machining applications, also available in a Kong Chimpbreaker chip-breaking variant for enhanced chip control.
• Sasquatch End Mills Cutting tool line positioned in the Super Bitchin' Performance category for demanding machining applications.
• Baboon End Mills Cutting tool line in the Super Bitchin' Performance category, also offered in a Baboon Chimpbreaker chip-breaking variant for improved chip management.
• Howler End Mills Cutting tool line in the Super Bitchin' Performance category for high-speed machining applications.
• Yeti End Mills High-performance cutting tool line in the Super Bitchin' Performance category.
• Gorilla Mill End Mills (Core Brand) The company's primary brand identity for carbide cutting tools. The portfolio covers carbide end mills, knuckle roughers, rougher/finishers, chip breakers, high feed endmills, threadmills, die/mold 3D surfacing end mills, chamfer mills, Picatinny form cutters, and drills.
• Gorilla Drill Drilling product line for CNC machining applications, manufactured and sharpened at the North American plant in Wisconsin and sold through Gorilla Mill's distributor network.
• Arsenal End Mills Cutting tool product line for industrial machining applications within the Gorilla Mill family.
• Knuckledraggers Knuckle Roughers Knuckle rougher product line engineered for heavy material removal in tough machining applications.
• Lemur End Mills Cutting tool product line within the Gorilla Mill brand portfolio.
• Missing Link End Mills Cutting tool product line for specialized machining applications.
• Die/Mold Chimps End Mills Cutting tool line designed specifically for die and mold machining applications.
• Primates End Mills Product line category that encompasses the primate-themed cutting tool brands in Gorilla Mill's catalog.
• Gorilla Mill Machinist Pro AF Mobile App Mobile speeds-and-feeds calculation app for machinists, available on iOS App Store and Google Play, with calculators for end mills, drills, 3D surfacing, threadmills, and high-feed endmills.
• Build a Tool (Custom Tool Building) Custom tool configuration service allowing customers to specify non-standard diameters, lengths, and geometries; all tools built are fully resharpenable.
• Reconditioning Services Re-sharpening, regrinding, reconditioning, and recoating services for Gorilla Mill products to extend tool life beyond initial use.
• Gorilla Mill Speeds and Feeds Calculators (Web) Online RPM, IPM, SFM, and chip-thinning calculators integrated with the Gorilla Mill Machinist Pro AF app for computing cutting parameters across various machining operations.

Quantifiable outcome

• 85% win rate in competitive testing against national brands
• +2 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Boeing CorporationcoreStrategic or Co-development Partner · 1 January 2015Gorilla Mill was invited by Boeing Corporation to participate in The Industry Challenge II at the AMRC testing facility at the University of Sheffield, England. The company outperformed all major competitors (including multi-billion dollar cutting tool companies with 50-100 years of history) in cutting 6AL4V titanium. The Gorilla Mill Phenom performed so well that Boeing canceled Phase 3 of the high velocity test.

Scale indicators7 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Seco Tools: Swedish-based metal cutting specialist (part of Sandvik Machining Solutions historically, now part of specialized tooling group). Directly competes with Gorilla Mill in carbide end mills and milling solutions for aerospace and general machining.
• Kennametal: Major US-listed manufacturer of metalworking tools and wear-resistant solutions. Overlaps directly with Gorilla Mill in carbide end mills, drills, and milling cutters for aerospace, defense, and general industrial machining.
• Sandvik Coromant: Global leader in metal cutting tools and a division of Sandvik AB. Directly competes with Gorilla Mill in carbide end mills, drills, and inserts, but operates at vastly greater scale with full tooling systems, CAM software, and global service support.
• Mitsubishi Materials U.S.A. Subsidiary of Mitsubishi Materials Corporation producing carbide cutting tools including end mills, drills, and inserts. Competes with Gorilla Mill in aerospace and high-performance milling of difficult materials, with deeper R&D and global reach.
• Walter Tools (Walter USA): German-based precision tooling manufacturer (part of United Machining Solutions) with strong US presence in carbide milling cutters, drills, and taps. Competes with Gorilla Mill in high-performance end milling for aerospace and automotive.
• Iscar Metals: Israeli-headquartered metal cutting tools manufacturer (part of IMC Group) offering end mills, drills, and turning tools. Comparable to Gorilla Mill in carbide milling product portfolio and aerospace/defense customer base.

Direct peers

• Harvey Tool: US-based specialty manufacturer of carbide end mills, drills, and tool sets targeting precision machining applications. Closely comparable to Gorilla Mill as a privately held, US-based specialty carbide tool maker serving aerospace, mold-making, and industrial CNC customers with extensive product catalogs.
• Guhring: Family-owned German manufacturer of rotary cutting tools including end mills, drills, and taps with a large US operation. Highly comparable to Gorilla Mill as a family-owned, privately held precision cutting tool specialist with proprietary coatings and strong distributor networks.
• OSG USA: US subsidiary of OSG Corporation, a leading Japanese manufacturer of taps, end mills, drills, and threading tools. Closely comparable to Gorilla Mill in product mix (carbide end mills and drills) and target customers (CNC machinists in aerospace and industrial).

Emerging players

• Maritool: Smaller US-based specialty manufacturer of precision carbide end mills focused on the mold-making and die/mold machining segment. Comparable to Gorilla Mill's Die/Mold Chimps line as a niche precision end mill maker for specialized machining applications.

Market position

Strengths5 records

Weaknesses1 record

Competitive moat3 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/GorillaMill

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Gorilla Mill