Madras Engineering Industries Private Limited Motor Vehicle Manufacturing New No.14 (Old No.17), Sathyanarayana Avenue, Chennai, Tamil Nadu.

Madras Engineering Industries Pvt Ltd. | June 7, 2023, 6:58 p.m.

Madras Engineering Industries Private Limited  Motor Vehicle Manufacturing New No.14 (Old No.17),  Sathyanarayana Avenue,  Chennai, Tamil Nadu.

Madras Engineering Industries Private Limited

Motor Vehicle Manufacturing

MEI is the largest manufacturer of Slack Adjusters, Clutch Boosters in India and the second largest Globally

Registered Office

Regd. Office: New No.14 (Old No.17),

Sathyanarayana Avenue,

Chennai, Tamil Nadu.

PIN-600 028, India.

Tel: +91 44 4742 3050

Head Office

C6, 1st Cross Street, South Phase,

Ambattur Industrial Estate,

Chennai, Tamil Nadu,

PIN – 600 058, India.

Tel:  +91 44 4742 3050,


Telephone : +91 44 4398 3200,

Email :


Telephone : +91 44 4398 3245,

Email :


Pioneered the indigenous design, development & manufacturing of Automatic Slack Adjusters - designs protected by multiple global patents.In-house R&D facility with world class testing capabilities – accredited by Department of Scientific & Industrial Research, Govt. of India.#1 choice for all Commercial Vehicle OEMS in India.2nd largest Slack Adjuster manufacturer in the world – trusted by global OEMs.State-of-the-art Ductile Iron Foundry supplying safety critical castings globally.Widest Dealer and Authorized Service Network across India ensuring Reach & Availability of Genuine MEI Parts.

(MEI) Madras Engineering Industries Private Limited is the largest manufacturer of Slack Adjusters in India & the 2nd largest globally.

With a market standing of over five decades had pioneered the indigenous development of Self Setting Automatic Slack Adjusters for Global and Indian Markets. MEI’s Automatic Slack Adjusters are exported to Europe, North America, South Africa, Brazil, Korea, Mexico, and Russia.

MEI is the preferred development partner for SASA by all OEMs in India. MEI enjoys over 80% fitment share with TML, AL, VECV, Bharat Benz, MTBL, and other OEMs in all their air brake fitted models. This apart, MEI is the 100% source for Trailer axle manufacturers like YORK, JOST, ADR, etc. MEI provides the widest product range covering Straight arm, Offset type & Crank type to suit every axle requirement.

MEI has its own State-of-the-art Research and Development facility at Maraimalai Nagar, Chennai accredited by Government of India. MEI’s SASA is an in-house developed product and has 5 global patents. MEI has also developed Clutch Boosters thru home-grown expertise for all Light & M&HCV applications and is the principal source to TML. MEIs Clutch Boosters have significant recognition with both OEM and AM customers.

Globally, MEI is the Second largest manufacturer of Automatic Slack Adjusters.

MEI has diversified into developing Air Disc Brakes for Passenger vehicles and has been exporting ADB assemblies to Europe. MEI ADB assemblies are retrofitted in various buses in India. All ADB assemblies exported have type approved by KBA.

MEI has set up a state-of-the-art Foundry for the manufacture of SG Iron castings. This foundry is equipped with DISA automatic high pressure flask-less vertically parted green sand molding machines, Complete dust, and fume extraction systems.

All Plants of MEI have IATF / TS 16949, ISO 14001 certifications. All ASAs exported has type approval by Link Laboratories USA and TUV Germany.


Establish MEI as a leading global player in Commercial Vehicle braking system components with a significant presence in National and International OEM and replacement market


Gain a leading market share globally by achieving global standard's in Product Technology, Process Technology & Quality.


The CVD is responsible for manufacturing of Slack Adjusters, Clutch Boosters and Air Disc Brakes to both domestic and international markets.  Strategic Sourcing, Supply Chain Management, Operations, Quality, HR and Manufacturing excellence are the main functions of CVD.

The key Strategic intents of this division include

Strategic sourcing and SCM optimisation.

Manufacturing excellence thru Lean Production system, digitally enabled no-fault forward works stations, flexible manufacturing.

Quality excellence thru SQA, IATF

CVD has 3 manufacturing locations (5 plants) in and around Chennai. Considering MEI product range being safety critical, the manufacturing template involves inhouse manufacture of all critical internal parts. The plant at Ambattur, the first manufacturing location for MEI,  is primarily engaged in manufacture of all internal parts for the Slack Adjusters and is equipped with the precision gear cutting machines, broaching machines, thread rollers, etc.

Maraimalai nagar plant is dedicated for manufacturing and assembly of slack adjusters and clutch boosters for domestic market. With modern manufacturing facilities and quality focused assembly lines, this plant delivers over 400 varieties of Slack Adjusters and over 13 varieties of Clutch boosters to the domestic market.

Mahindra city plants focus on exports. While the mainstay product of Slack Adjusters are exported for both OEM fitment and for after market to various countries, the newly crated Air Disc Brake plant has commenced export of ADB assemblies to UK After Market

Each of the plants have independent organisation structure with matrix support structure for strategic sourcing, supply chain and quality.

Market leader in India

Application in all CV models manufactured in India

Product to suit Rigid axle, Drive axle, Tag axle, Pusher axle, Air Suspension & Trailer axles.



Slack Adjusters

→ Automatic Slack Adjusters

→ Manual Slack Adjusters

→ Self Setting Automatic Slack Adjusters

Clutch Boosters

Air Disc Brake


Air Hose Assembly


Drain Valve

Low Pressure Switch

Stop Light Switch

Foundry Division

MEI invested in Foundry division @ Pillaipakkam in 2012 to enable faster response o customer schedules & to build flexibility to meet customer product requirement. This Foundry specialises in SG Iron Castings (Ductile/Spheroidal) focus on safety critical parts on both commercial vehicle and passenger vehicle applications. Over the period MEI has developed many external customers and has been recognised as a high quality casting supplier. MEI also exports regularly ready-to-fit machined castings to the US and European markets. Mei focus on growing external customer business.

What We Do

All grades of SGI castings

Design to suit every customer requirments.

Complete product solution inc, machining, surface treatment, heat treatment, etc.

Lead time synchronized to customer time line.

Customer Segments

Currently we cater to HCV, MCV including exports. Our main focus is on passenger car segment and also on Non auto & general Engineering.

Commercial Vehicle

Passenger Vehicle

Non-auto & general Engineering

Our Process

Design Development


Core Making




Dedicated 33kV –Incoming Power Line

In house captive power plants of 500 kVA & 140 kVA, to meet out any emergency situations

Solar Powered Street Lights

Corporate Social Responsibility

Adopted near by Primary School for revamping and development.

Environment Care

100% adherence to PCB

Online monitoring of pollution norms

12% of energy spent on Pollution Control Equipment’s

25% of Landscape to maintain greenery

100% rain harvesting system


MEI has State-of-the-art R&D centre at Maraimalai Nagar facility. Our in house R&D centre is audited and certified by India’s Department of Scientific and Industrial Research (DSIR). MEI R&D employs over 35 skilled engineers in designing, developing and validating products for both domestic and international markets. The R&D team continuously works on strengthening our technology to keep abreast of the changes, upgrade & develop new products to meet increasing global demands. We continuously engage in collaborative work with Premier educational Institutes for synchronizing with technology for developing world-class products for our customers.

During 2007 when the mandate for Automatic slack adjusters was implemented in India, MEI pioneered the self-adjusting slack adjusters and offered the best-suited product to Indian OEMs. This home grown design developed by MEI enjoys 5 global patents apart from the quality accreditation from all OEMs as the most reliable product. MEI offers wide range of slack adjusters with various lever lengths, straight or offset arm, low or high torque type versions, and supplies over 800 SKUs globally.

In 2011 MEI developed hydraulically triggered, Air assisted Clutch boosters with in-house R&D efforts. This product holds the customer’s trust for its quality levels and higher reliability and helped in import substitution. MEI patented clutch booster comes in the complete range which covers 70 mm, 76 mm, 90 mm and 102 mm diameter versions to suit any vehicle application.

In 2014 our R&D engineers developed Air Disc Brake Calipers suitable for most of the European vehicle applications. We offer wide range of ADB based on wheel rim sizes and different rotor diameters and multiple variants based on chamber mounting angle and wear sensor type. Today MEI is a recognized brand in Europe for Air Disc Brakes for its quality & reliability and we are working towards the development of ADB for the Indian OEMs.

The R&D Centre is accompanied by a full-fledged testing laboratory. Our lab is equipped with test rigs, fatigue rigs and LINK dynamometer to carry out the complete product testing as per SAE, ECE R13 / R90, JIS and other global standards. Our testing engineers carry out the performance and endurance testing of Slack Adjusters, Clutch boosters & ADB in-house.

Keywords: Commercial Vehicle Madras Engineering Industries Private Limited Passenger Vehicle Non-auto & general Engineering

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