What GMT does

GMT (Guindy Machine Tools Limited) is a Chennai-headquartered, family-controlled Indian manufacturer founded in 1959 that designs and produces precision workholding solutions, metrology products, and machine tools for the metalworking industry. Its core product lines include manual and power-operated lathe chucks, hydraulic/pneumatic actuating cylinders, electro-mechanical actuators, specialised chucks (auto-indexing, ball lock, eccentric compensating, quick-change, finger, expanding mandrel, friction welding, collet), flat lapping machines, belt grinders, and a full range of granite and cast-iron metrology references including surface plates, master squares, angle plates, and custom precision granite structures. Underlying technology is mechanical and materials-science driven: wedge/bar and ball-lock actuation mechanisms, eccentric compensating wedges, nickel-chrome steel case hardening, precision grinding of working surfaces, and use of Deccan plateau granite selected for metrology stability, with capability to manufacture workholding up to 1.5 metres in diameter and granite structures up to 12 metres in length.

The company monetises primarily through direct, quote-based hardware sales to industrial customers, supplemented by reconditioning, calibration, contract inspection, and customer-education services. It serves more than 10,000 customers across automobile and auto components (the primary vertical), white goods and appliances, defence, nuclear, and aerospace, as well as general light and heavy engineering, and exports internationally. Distribution is direct from Chennai HQ with an additional operations/support site at Hosur, and GMT is the exclusive India representative for Berg Spanntechnik (Germany). The company is privately held with no external funding, no public listing, no disclosed revenue, and active management by the founder's family under Managing Director B. Venugopal.

Name

GMT

Legal name

Guindy Machine Tools Limited

Website

https://gmt.co.in

Company type

Private

Founded year

1959

Operating status

Operating

Headcount range

251–500 employees

Short description

GMT (Guindy Machine Tools) is a Chennai-based, family-owned Indian manufacturer founded in 1959 that produces precision workholding chucks, actuating cylinders, lapping machines, and granite metrology products, serving over 10,000 industrial customers across automotive, defence, aerospace, and general engineering sectors.

Ownership category

akta.pro rank

Product category

Industrial Machine Tools and Workholding Equipment

NAICS

Metalworking Machinery Manufacturing (33351)

SIC

Metalworkg Machinery & Equipment (3540)

akta.pro primary industry

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

Keywords

• Precision workholding solutions
• CNC lathe chucks
• Metrology surface plates
• Industrial machine tools
• Workholding actuators

Headquarters

HQ city

Chennai

HQ country

India

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Workholding Products: GMT generates primary revenue from manufacturing and selling workholding equipment including lathe chucks, power chucks, manual chucks, and special custom chucks. Products range from standard configurations to highly customized solutions for specific machining applications.
2. Metrology Products: Sale of granite surface plates, cast-iron surface plates, angle plates, master squares, and custom metrology equipment for dimensional inspection applications.
3. Machine Tools: Manufacturing and sale of machine tools including flat lapping machines, planetary lapping machines, and belt grinders.
4. Professional Services: Reconditioning of chucks, cylinders, and metrology products; calibration services; customer education programs on maintenance; contract inspection services.
5. Custom Solutions: Design and manufacture of custom workholding solutions and special precision granite structures as per customer requirements for unique applications.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

GMT designs, manufactures, and sells precision workholding equipment (lathe chucks, power chucks, indexing chucks, expanding mandrels), metrology products (granite surface plates, cast iron surface plates, master squares), machine tools (flat lapping machines, belt grinders), and actuating systems (hydraulic/pneumatic cylinders and electro-mechanical actuators). The company also offers custom workholding solutions, reconditioning services, calibration, contract inspection, and customer education programs for Indian metalworking manufacturers.

Product overview

GMT (Guindy Machine Tools) is an Indian manufacturer of precision machine tools, workholding equipment, and metrology products founded in 1959. The company offers a comprehensive portfolio of industrial products organized into four main categories: (1) Workholding Solutions including Manual Chucks, Power Chucks/CNC Lathe Chucks, 3/4 Jaw Chucks, and specialized chucks such as Auto/Hand Indexing Chucks, Universal Ball Lock Chucks, Eccentric Compensating Chucks, Quick Change Jaw Chucks, Grip Down Chucks, Finger Chucks, Expanding Mandrels, Friction Welding Chucks, and Collet Chucks; (2) Machine Tools including Flat Lapping Machines and Belt Grinders; (3) Metrology Products including Granite Surface Plates, Cast Iron Surface Plates, Angle Plates, Master Squares, Cubes, Straight Edges, Bed Plates, and Bench Centres; and (4) Actuating Systems including Hydraulic/Pneumatic Rotating Cylinders and Electro-Mechanical Actuators. GMT also provides custom workholding solutions for specific applications like valve bodies, steering knuckles, gears, and bonnets. The company is India's only supplier of high-quality cam-operated manual chucks and manufactures equipment up to 1.5 metres in diameter.

Differentiator

Problem solved

Functional benefit

Products and services

• Manual Chucks Sturdy manual chucks with worm and worm wheel mechanism providing high mechanical advantage and gripping power. GMT is the only Indian supplier of high-quality cam-operated manual chucks for lathes, capable of withstanding high cutting forces and can be made up to 1.5 metres in diameter. Targeted at manufacturers using lathes without power clamping.
• Power Chucks (CNC Lathe Chucks) Power-operated high-speed chucks for CNC lathes with compact construction offering less weight and low inertia, positively influencing dynamic effects on CNC machine spindles. Available in various models including PHNC and centrifugal compensation versions for CNC turning applications.
• 3 Jaw Hydraulic Chucks Three-jaw hydraulic chucks for power-operated clamping in CNC turning applications requiring hydraulic actuation and self-centering capability.
• 4 Jaw Chucks Four-jaw chucks for workholding applications requiring independent jaw adjustment, allowing clamping of square, rectangular, or irregularly shaped workpieces on lathes.
• Pneumatic Front End Chuck Power-operated pneumatic chuck designed to utilize spindle bore for bar/pipe workpieces. Features built-in actuating cylinder, stationary air distribution system, and twin non-return valves for clamping force retention. Available in sizes from 160mm to 1000mm diameter with standard or extended jaw stroke.
• Auto Indexing Chuck Power-operated indexing chuck for machining components with intersecting axes in a single setup. Multiple turning operations possible in one chucking operation. Index positions available: 4x90, 3x120, 2x180 degrees. Indexing accuracy: +/- 2 minutes. Suitable for machining automobile parts like universal joints, spiders and valve bodies.
• Hand Indexing Chuck Manual indexing chuck for components with intersecting axes. Index positions: 4x90, 3x120, 2x180 degrees. Roughing accuracy: approx. 0.1mm at 100mm; Finishing: 0.03-0.05mm at 100mm. Ideal for machining bonnets, universal joints, fittings, pump bodies, valve bodies.
• Universal Ball Lock Chuck (UBLC) Power-operated ball lock chuck with distinctive advantages over wedge and lever type chucks. Provides both radial clamping forces and axial force to pull component against butting face. Available in self-centering and eccentric compensating versions. Features positive pull back action and sealing to prevent chip entry.
• Eccentric Compensating Chuck Designed for machining forgings and black bars between centres. Features spring-loaded centre to ensure component rests against chuck face. Radially floating wedge accommodates irregularities in roundness. Can also be used as self-centring type with special cover.
• Eccentric Compensating Retractable Jaw Chuck Variant of eccentric compensating chuck with retractable jaws for components mounted between two centres. Radially floating wedge design accommodates irregularities in component roundness. Features forged steel body, hardened and ground slideways, nickel-chrome steel floating wedge and base jaws case hardened.
• Quick Change Jaw Chuck (PHQC) Power-operated quick change jaw chuck for rapid jaw changing on CNC lathes. Eccentric locking pin design enables quick reset, reversal or replacement of gripping jaws using hexagonal key. Wedge bars counteract centrifugal force effects.
• Grip Down Chucks (Pull Down Chucks) Ideal for second operations finishing. Features radial and pull-back function ensuring high gripping force, closer concentricity, closer parallelism, high accuracy repeatability, and heavy duty pin design.
• Finger Chuck Axial gripping chuck for unusually shaped components where only axial gripping force can be applied. Hydraulic cylinder actuates fingers. Features workpiece locator ensuring exact location. Used for aluminium wheels, second operations, pump housings, aerospace components.
• Expanding Mandrel Power-operated flange type expanding mandrels for thin-walled components and internal clamping problems. Provides quick and secure clamping, concentricity, positive location against backstops, controlled datums, and no pressure marks in clamped bore.
• Friction Welding Chuck Special chuck designed and manufactured for friction stir welding machines. For use in applications including automotive axles, bimetallic applications, turbochargers, automotive gears, and drive shafts.
• Collet Chuck Collet chucks available in 26mm, 36mm, 42mm and 60mm sizes. Interchangeable with GMT power chucks. For smaller parts and bar feeding applications. Provides better grip with uniform 360-degree support. Gripping capacities from 10mm to 63mm diameter.
• Actuating Cylinders Wide range of cylinders from conventional pneumatic cylinders to highly sophisticated extra large 350mm diameter hydraulic cylinders for actuating power chucks on CNC lathes and special purpose machines.
• Electro-Mechanical Actuators (EMA) Actuators for rotating work spindles where pneumatic or hydraulic rotating cylinders cannot be used. Models include EMA-Model-U, EMA-Model-UF, Stationary EMA-Model-ST, Stationary EMA-Model-VA, and EMA for Tailstock Application-Model-P.
• Flat Lapping Machines Precision lapping machines for achieving flatness, parallelism, size and surface finishes to demanding tolerances. Capable of achieving flatness rating of one millionth of an inch and surface finishes to 0.6Ra. Used by manufacturers requiring ultra-precision surface finishing.
• Belt Grinders Belt grinding machines for metalworking applications requiring surface finishing and material removal on metal components.
• Granite Surface Plates Precision granite surface plates for dimensional metrology, inspection and layout work. Made from stable igneous rocks (diabase, gabbro). Available in sizes up to 12m length. Complies with Indian Standard IS7327:2003, Federal Specification GGG-P-463C, and DIN 876.
• Cast Iron Surface Plates Cast iron surface plates for metrology applications requiring stable reference surfaces for inspection and measurement operations.
• Granite Master Squares Triangular and rectangular master squares for precision metrology applications requiring high-accuracy angular reference standards.
• Granite Cube Precision granite cubes for metrology applications requiring stable three-dimensional reference geometries.
• Cast Iron Angle Plates Cast iron angle plates for metrology and inspection applications requiring accurate angular reference surfaces.
• Cast Iron Straight Edge Precision straight edges for metrology applications requiring linear reference standards.
• Cast Iron Bed Plates Bed plates for metrology and inspection applications requiring large stable reference surfaces.
• Bench Centre Granite and cast iron bench centres for precision measurement between centres in metrology applications.
• Precision Rotary and Indexing Tables Rotary and indexing tables for precision positioning in machining operations requiring angular positioning of workpieces.
• Reconditioning Services for Chucks and Cylinders Reconditioning services for GMT-made chucks, cylinders, and electro-mechanical actuators, along with reconditioning of metrology products, CMMs, and lapping machines. Includes pre-sales workholding solutions, recommendations and design of special precision granite structures.
• Calibration and Contract Inspection Services Rework and calibration services for all metrology products including other brands, calibration of coordinate measuring machines, contract inspection services, and training on coordinate measuring machines. Provided through the Hosur metrology division and Chennai headquarters.
• Berg Spanntechnik (Germany) Product Distribution GMT serves as the exclusive India representative for Berg Spanntechnik (Germany), distributing German workholding technology in the Indian market alongside its own product portfolio. Extends GMT's offerings to include internationally-sourced premium workholding solutions.
• Granite Special Structures Custom-built granite structures for machines like 3D printers, CT scanners, and optical lens finishing machines requiring vibration damping and temperature stability. Designed and manufactured as per customer requirements for unique applications.

Quantifiable outcome

• Delivered largest single-piece granite surface plate: 12,000mm x 1,500mm x 500mm with 50 micron flatness and T-Slot straightness of 10 microns per metre
• +2 more outcomes

Named customers9 records

Segments4 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• Berg Spanntechnik (Germany)coreChannel Partner/ Reseller/ DistributorGMT serves as the exclusive India representative for Berg Spanntechnik, Germany. This partnership allows GMT to distribute German workholding technology in the Indian market, complementing their own product portfolio of lathe chucks, cylinders, and metrology equipment. The partnership extends GMT's offerings to include internationally-sourced premium workholding solutions for Indian manufacturers.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Schunk GmbH & Co. KG: German world leader in toolholding, workholding, and gripping systems. Direct competitor to GMT across power chucks, stationary workholding, and customized special-purpose clamping solutions globally and in India.
• Lapmaster Wolters: Global precision surface finishing and flat-lapping machine manufacturer. Direct peer to GMT's lapping machine product line in the metalworking precision-finishing market.
• Röhm (RÖHM GmbH): German chuck and workholding specialist with global footprint. Competes directly with GMT on lathe chucks, power chucks, and clamping devices for industrial turning applications.
• Pratt Burnerd International: British-origin chuck manufacturer with a long heritage in power and manual chucks for lathes. Overlaps with GMT in standard and large-format workholding for industrial turning operations.
• Hainbuch (Hainbuch GmbH): German workholding specialist focused on clamping devices, mandrels and turning chucks. Comparable to GMT in customer segments (automotive, general engineering) and in offering custom workholding solutions.
• Bison-Bial (Bison-Werke): Polish-based chuck, machine vise and workholding manufacturer with broad global distribution. Direct competitor in standard and power chucks for lathes, comparable in price-positioning and customer type to GMT.
• Kitagawa (Kitagawa Corporation): Japanese global leader in power chucks, CNC lathe chucks, and workholding solutions. Directly competes with GMT in CNC power chuck and indexing chuck categories for the Indian automotive and engineering customer base.
• Forkardt (F極Kardt Holding): Hard- and soft-chuck specialist (now part of the Niko Group) serving turning and grinding applications. Direct peer to GMT in power chucks, indexers, and specialized workholding for precision machining.

Broad incumbents

• Mitutoyo Corporation: Global leader in precision metrology instruments including surface plates, CMMs, and gauges. Comparable to GMT's metrology division as a broader incumbent with overlap in granite surface plates and inspection equipment.
• HMT Machine Tools (Hindustan Machine Tools): Long-standing Indian state-owned machine tool manufacturer offering lathes, grinding machines and accessories. A broad incumbent within the same Indian metalworking ecosystem as GMT, with partial overlap in workholding accessories.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/gmt.co.in

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 GMT