MST

What MST does

MST Corporation is a Japanese manufacturer of precision tool holder systems for CNC machining centers and turning mills, founded in 1937 as MIZOGUCHI IRON WORKS in Fukuoka and now headquartered in Ikoma, Nara. The company's core technology is its proprietary special steel and shrink-fit holder system, which achieves low-temperature shrink fitting at 300°C with a thermal expansion coefficient 1.6x greater than competing materials, enabling super-slim 1.5mm holder tip wall thickness and submicron runout accuracy (down to 0.5μm with the BLACK UNO product). The product portfolio spans over 4,000 SLIMLINE shrink-fit holder variations, modular angle heads, milling chucks, collet holders (DETa-1 reducing collet types by 90%), the SMART GRIP 5-axis work-holding system, HSK-T tooling for multi-tasking machines, and a maintenance product line (CHECKMATE test bars, STAR DUST cleaning tools, CLEAN BOX washers).

The company operates a hybrid sales model combining regional direct-sales teams in Japan (Eastern, Central, Western, and Nagano), four international J-COMPO distribution warehouses (Chicago, Nuremberg, Hong Kong, Thailand), a wholly-owned Thai manufacturing subsidiary, and a heavy event-driven presence at major global trade shows (JIMTOF, IMTS, EMO, CIMT, DMC, AMB). Revenue is generated through hardware sales of tooling systems and peripheral equipment; pricing is not publicly disclosed and quotes are routed through sales representatives. Named main customers include OSG Corporation, MAKINO MILLING MACHINE, YAMAZEN CORPORATION (a trading distributor), and G-NET CORPORATION, with the product line serving precision machining, die/mold, and aerospace/automotive component manufacturers globally.

The company is privately held and appears to be family-owned, led by President Haruki Mizoguchi (appointed 1983). It has grown organically through reinvestment rather than external funding—no venture capital, private equity, or public market listing is referenced in the available materials. Operating status is active as of 2026, with three new products launched in February 2025 (SLIMLINE Mono Curve Long Type, CLEAN BOX Baby, Heat Robo Automatic Shrink-Fit System) signaling continued R&D investment in automation and mold-machining applications.

Name

MST

Legal name

MST Corporation

Website

https://mst-corp.co.jp

Company type

Private

Founded year

1937

Operating status

Operating

Headcount range

251–500 employees

Short description

MST Corporation is a Japanese manufacturer (founded 1937, ~282 employees, Ikoma, Nara) of precision shrink-fit tool holders, angle heads, and work-holding systems for CNC machining centers, serving machine tool builders, die/mold shops, and aerospace/automotive manufacturers globally through direct sales, warehouses in four continents, and a Thai manufacturing subsidiary.

Ownership category

akta.pro rank

Product category

Machine Tool Tooling Systems

NAICS

Cutting Tool and Machine Tool Accessory Manufacturing (333515), Special Die and Tool, Die Set, Jig, and Fixture Manufacturing (333514), Metalworking Machinery Manufacturing (33351)

SIC

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

akta.pro primary industry

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

akta.pro secondary industry

CNC Machine Tools (Turning, Milling, Machining Centers) (IMAHADAA)

Keywords

• Precision tool holders
• Shrink-fit holders
• CNC machining tooling
• Angle heads
• Workholding systems

Headquarters

HQ city

Ikoma

HQ country

Japan

HQ region

Asia

Offices10 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Tooling Systems: Manufactures and sells precision tool holders including shrink-fit holders, angle heads, collet holders, arbors, and work holding systems for machining centers and turning mills
2. Peripheral Equipment: Sells maintenance tools, measurement tools, and wire EDM fixtures. Includes shrink-fit heaters, cleaning machines, and test bars.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

MST Corporation manufactures and sells precision tooling systems for CNC machining centers and turning mills, including shrink-fit holders (SLIMLINE family), angle heads, collet holders, rigid-type arbors, work-holding systems, and peripheral maintenance/measurement equipment. The company also produces shrink-fit heaters, cooling systems, cleaning/inspection tools, and wire EDM fixtures that complement its core tool-holder lineup. Offerings target industrial manufacturers across automotive, aerospace, die & mold, and general machining sectors.

Product overview

MST Corporation is a Japanese tooling systems manufacturer founded in 1937, offering a comprehensive portfolio of precision tool holders, work-holding systems, and machining accessories. The product lineup centers on SLIMLINE shrink-fit holders (including MONO 3°, MONO CURVE, UNO, Z, and HYPER VERSION variants) as the core technology, complemented by ANGLE HEAD products (HALF, HALF mini, and standard ANGLE HEAD), MC TOOL offerings (FMH Rigid-Type Arbor, RED SCREW ARBOR, DETa-1 Collet Holder, COLLET HOLDER, Hi-ART Milling Chuck), SMART GRIP workpiece clamping systems, and HSK-T tooling systems for multi-tasking machines. Supporting products include MILL BORE helical boring holders, HEATROBO induction shrink-fit heaters, Shrink-fit Holder Chillers, precision measurement tools (CHECKMATE test bars, Goo Checker), maintenance equipment (STAR DUST cleaning tools, CLEAN BOX washers, MAINTENANCE VIDEO tutorials, 6S DESK workstations), and wire EDM fixtures (MIDDLE VISE, WIRE CUT UNIT). The company also provides CAD data downloads and video operation manuals as technical support resources. With over 4,000 holder variations and 35+ years of custom angle head manufacturing experience, MST serves global manufacturing customers across automotive, aerospace, and general machining sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• SLIMLINE Shrink-Fit Holders Shrink-fit holder system manufactured from MST's proprietary special steel for CNC machining centers, enabling low-temperature shrink fitting at 300°C with a super-slim 1.5mm holder tip wall thickness; available in 4,000+ variations (regular, slim, heavy-duty) for manufacturers seeking high rigidity and precision.
• SLIMLINE 2 PIECE Type Modular two-piece shrink-fit holder that allows free combination of master holders and collets for flexible configuration across CNC machining applications.
• SLIMLINE MONO 3° Shrink-fit holder with a 3-degree tapered slim nose offering over 3,000 holder types to access close walls and avoid interference in deep-cavity machining.
• SLIMLINE MONO CURVE Shrink-fit holder with slim nose and reinforced neck providing high accessibility and rigidity for 5-axis machining and small-diameter end milling of large molds.
• SLIMLINE UNO / BLACK UNO Submicron shrink-fit holder achieving runout accuracy of 1μm or less (UNO) and 0.5μm or less (BLACK UNO), designed for micro-machining and precision finishing.
• SLIMLINE Z Anti-Slippage Holder Shrink-fit holder using Z shank tool design with four safety configurations to eliminate tool pulling out due to chattering or abrupt cutting force increases during heavy-duty machining.
• MILL BORE Helical Boring Holder Tool holder combining a SLIMLINE shrink-fit holder with a carbide arbor for exchangeable indexable cutters, replacing conventional boring heads with superior surface roughness, roundness, and cylindricity for helical boring.
• STRAIGHT ARBOR Arbor extension that accurately extends short overall cutters, allowing replacement of long expensive cutters with short inexpensive ones and offering 111 variations for adjustable projection length.
• HEATROBO Shrink-Fit Heater Induction-based shrink-fit heater enabling easy shrink-fitting of SLIMLINE holders, with multiple models (DENJI 5000S, DENJI 2500, DENJI 1200S, Baby 3000S) and one coil covering 3–16mm diameter holders on 200–240V single-phase power.
• Shrink-fit Holder Chiller Shrink-fitting work efficiency kit that shortens shrink-fitting time by separating heating and cooling operations; available in A, B (compact), and C (for hot-air heater) types and requires no power supply.
• ANGLE HEAD HALF Modular angle head optimized for drilling and tapping with a compact design that covers 80% of angle head operations at half the price, delivery time, and weight of conventional products, using commercially available gears and bearings for easy repair.
• ANGLE HEAD HALF mini Extra-compact angle head version using half the parts (22 pcs.) of conventional heads, offering lightweight, affordable, quick-delivery performance for small machining centers and hard-to-reach places.
• ANGLE HEAD (Modular/Solid/Flange/Universal) Modular, solid, flange, and universal angle heads for O.D. and I.D. machining with custom-made options backed by 35+ years of experience at MST.
• FMH Rigid-Type Arbor Face mill arbor integrating a large solid carbide core into a thick body by shrink-fitting, achieving less deflection and higher efficiency during long-gauge machining at effective lengths from 60mm to 360mm.
• RED SCREW ARBOR Carbide-integrated screw arbor with high rigidity and low deflection, compatible with indexable end mills from multiple manufacturers and achieving steady chatter-free deep standing-wall machining.
• DETa-1 Collet Holder Pull collet design achieving both large collapsibility and precise chucking, slim and compact without a nut at the tip; reduces collet types required by 90% vs prior products with a pre-balanced DTE version available.
• COLLET HOLDER (CTA/CTH) Tapered collet holder combining high-speed efficient machining capabilities with a 6° ideal taper angle for run-out accuracy, gripping force, and rigidity; a pre-balanced CTH version is available.
• Hi-ART Milling Chuck High-precision milling chuck engineered for machining center applications requiring reliable cutter gripping.
• SMART GRIP Work-Holding System Workpiece clamping system for 5-axis machining centers featuring compact, quick-changing, high-rigidity dovetail clamping, HSK-A interface, and hydraulic design compatible with robotic automated work-piece changing.
• HSK-T Tooling Systems Tooling systems specifically designed for multi-tasking machines and turning mills using the HSK-T interface standard.
• CHECKMATE Test Bar Test bar for machine spindle maintenance and run-out accuracy checking; hollow body design 20% lighter than conventional, with CMA (dynamic accuracy) and CMB (Z-axis deflection) variants.
• STAR DUST Spindle Cleaning Wiper Spindle taper hole cleaning tool that achieves high-precision machining by removing contamination from machine spindle tapered holes, with easily replaceable cleaning wiper parts.
• CLEAN BOX / CLEAN BOX Baby Tool Holder Washing Machine Tool and tool holder washing machine line, including CLEAN BOX Baby which operates with air (no power supply) to wash away chips and dirt immediately after machining and prevent scratches, rust, and accuracy issues.
• MIDDLE VISE Wire EDM Work-Holding Fixture Work-holding fixture designed for wire EDM machining applications.
• WIRE CUT UNIT Wire EDM fixture and tool component for wire EDM machining operations.
• HYPER VERSION Shrink-Fit Holders SLIMLINE shrink-fit holder sub-brand offered in Short type for high-speed spindle machining centers (double machining efficiency) and Heavy type for high-torque spindles (1.4x gripping force), preventing cutter slippage or pull-out.
• Heat Robo Automatic Shrink-Fit System Automated shrink-fit system for SLIMLINE shrink-fit holders featuring electromagnetic induction heating, supporting tool diameters φ3–8 and HSK-E25/E32/E40/F63 holders.
• 3S Balloon Slimline Cap Slimline cap that cleans the internal bore and prevents dirt introduction via a rotating 3S balloon wiper effect; supplied as standard accessory for BLACK UNO holders.
• Goo Checker Measurement Tool Measurement tool designed for quality control applications in manufacturing environments.
• ENDMILL HOUSE Storage System End mill storage and organization system for improving workshop efficiency.
• 6S DESK Workstation Workstation for tool setup and maintenance supporting the 6S methodology for workplace organization and efficiency.

Quantifiable outcome

• Double the machining efficiency compared to conventional holders (FMH Rigid Type)
• +4 more outcomes

Named customers4 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Five partnerships are on record, tiered core and minor.

• OSG CorporationcoreStrategic or Co-development PartnerPartnership and main customer relationship. OSG is a major cutting tool manufacturer, and MST supplies tool holders compatible with OSG products. Multiple OSG tool recommendations appear in MST product catalogs (e.g., FMH, HYPER VERSION).
• KATO Mfg. Co., Ltd.minorStrategic or Co-development PartnerListed as a partnership relationship in company profile. Nature of partnership not detailed.
• KYUSHU KOGU CO., LTD.minorStrategic or Co-development PartnerListed as a partnership relationship in company profile. Nature of partnership not detailed.
• MIZOGUCHI TECHNICAL LABORATORYcoreTechnology or IntegrationAffiliated company for technical development and know-how sharing, likely supporting MST's proprietary technology development.
• MST Corporation Thai LTD.coreOthersWholly-owned subsidiary in Thailand for local manufacturing and distribution, established in 2015.

Scale indicators6 records

Recent moves16 records

Expansion highlights6 records

Broad incumbents

• Kennametal Inc. US-listed global tooling and wear-resistant materials supplier. Sells tool holders, collets, milling chucks and cutting tools across automotive, aerospace and general engineering — directly overlapping MST's customer segments with a much wider portfolio.
• Sandvik Coromant: World-leading tooling manufacturer within Sandvik AB. Offers a broad tool holder portfolio alongside indexable cutting tools and inserts. Comparable as an incumbent competitor across MST's full product range, with a global direct and distributor sales model.
• Gühring KG: German-based global manufacturer of rotary cutting tools and tool holding systems. Broad portfolio with significant tool holder offering makes it a broad-incumbent peer to MST across automotive and general engineering machining markets.

Direct peers

• OSG Corporation: Japanese manufacturer of taps, end mills, drills and tool holders; listed MST partner and main customer. Overlap with MST in tool holders and accessories, and the OSG-MST cross-recommendation in catalogs makes them complementary peers.
• Schunk GmbH & Co. KG: German specialist in tool holding (shrink-fit, collet, hydraulic), workholding and gripping systems. Directly comparable in precision clamping and automation-ready tool holding (parallel to MST SMART GRIP and HSK-T lines).
• Haimer GmbH: German-based specialist in shrink-fit tool holders, balancing machines, and 3D sensors. Closest direct competitor to MST in shrink-fit / thermal-expansion-based tool holding, serving the same CNC machining centers with comparable technology and channel (trade shows, distributors in Japan and worldwide).
• Parlec Inc. US-based manufacturer of tool holders (CAT, HSK, BT, shrink-fit) and presetters. Comparable mid-sized specialty tooling peer competing in the same shrink-fit/collet-holder categories as MST, especially in North America.
• Tungaloy Corporation: Japanese cutting tool and tool holder manufacturer, comparable to MST as a domestic Japanese specialty tooling competitor with global distribution; supplies holders, indexable inserts and drilling products.
• BIG KAIZER: Taiwanese specialist in large-diameter shrink-fit holders and HSK arbors. Competes head-to-head with MST SLIMLINE and FMH-style products in heavy-duty/long-reach shrink-fit applications, especially across Asia.

Emerging players

• OTT-JAKOB GmbH: German manufacturer of precision tool holders (shrink-fit and hydraulic), clamping devices, and powerdrawbar systems. Direct overlap with MST's high-precision shrink-fit holders; smaller global footprint but strong European presence.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/msttooling
• YouTubeyoutube.com/MSTTOOLING
• Facebookfacebook.com/MstTooling
• LinkedInlinkedin.com/company/mst-corporation-japan
• Instagraminstagram.com/mst_tooling

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries2 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 MST