Shanthi Gears is fundamentally a precision-engineering house that makes the hidden components keeping India’s heavy industry turning - gears and gearboxes. Founded in 1969 as a textile-machinery supplier and now a subsidiary of Tube Investments of India within the Murugappa Group, it has spent over five decades moving from standard parts to highly customised, import-substituting solutions for everything from steel mills and cement plants to railways and aerospace. The recurring approach is to embed itself so deeply in a customer’s machinery - through original design, on-site servicing, and the refurbishment of any gearbox regardless of brand - that it becomes irreplaceable, a one-stop shop rather than a commodity supplier.
Business segments
Two engines that feed each other - a custom-gear manufacturing business that wins on engineering depth, and a service-and-aftermarket business that locks in customers for life.
1. Gears and Gear Motors: the custom-engineering core
The company designs and builds bespoke gearboxes for heavy industry, often replacing imports with first-time Indian solutions - it competes on engineering skill, not price.
- Customised, not off-the-shelf - the company predominantly offers tailored solutions for specific industrial applications, a model it describes as unique in the gearbox industry, which builds lasting relationships and reduces vulnerability to market swings.
- Import substitution is the growth play - it has developed indigenous gearboxes for steel, cement, mining, and construction that were previously imported, and makes gears for defence and railway safety systems like the Kavach automatic train-protection system, conserving foreign currency and creating a captive market.
- Extreme engineering as a moat - the company has built gears from 25 mm to 3,200 mm in outer diameter and tested gearboxes at speeds exceeding one lakh RPM, capabilities that few domestic competitors can match.
- First-mover in high-spec niches - it developed and supplied traction gears and pinions for high-speed rail applications, and was the first Indian gear manufacturer to earn AS-9100D aerospace certification and IRIS railway certification, opening doors to safety-critical sectors where qualification itself is a barrier.
- Total solutions, not just parts - by integrating motors and couplings into turnkey gear assemblies, the company reduces the buyer’s vendor count and offers single-point responsibility, making it harder for customers to switch to component suppliers.
2. Gear Drives and Services: the lifetime lock-in
Under the “Shanthi Rebuild” brand, the company repairs and refurbishes any make of gearbox - Indian or global - turning every broken machine in the country into a recurring revenue opportunity.
- Brand-agnostic servicing - a full-fledged team spread across India provides end-to-end refurbishment of any gearbox, develops spares through faster processing to cut equipment downtime, and deploys on-site manpower for assembly and commissioning, so the company earns from competitors’ installed bases too.
- Servicing as a relationship flywheel - the company views repairing gears of any make as a platform to build customer relationships and grow its own engineering knowledge, which in turn feeds back into better original designs.
- Value engineering for existing systems - through Value Addition and Value Engineering (VAVE) services, it enhances the efficiency of gear systems already in operation, creating an upgrade revenue stream beyond simple repair.
- Renewable-energy aftermarket - it services and replaces windmill gearboxes and gear components, giving it a foothold in the renewable-energy supply chain without having to design the original turbine.
- Foundry feeds both sides - the in-house foundry division at Kannampalayam, Coimbatore, supports manufacturing and service operations, and the company continuously develops alternate materials and processes to drive cost reduction and value addition across both segments.
Manufacturing and quality backbone
Three plants, a captive foundry, and a suite of certifications that act as a licence to supply the most demanding customers - aerospace, railways, and defence.
- Certifications unlock regulated markets - it holds ISO9001, ISO14001, ISO45001, IRIS (railways), AS9100D (aerospace), NADCAP for heat-treating and non-destructive testing, and the Pressure Equipment Directive certification, each one a prerequisite for supplying its target industries.
- Precision investment, not mass production - capital investments are directed wherever technological upgradation is required, and the company has invested in precision equipment to stay ahead of process benchmarks, reflecting a quality-over-volume philosophy.
- Integrated operations with vendor depth - an ERP system with in-built controls monitors the entire chain, and a vendor base has been developed around its manufacturing locations, creating a local supply ecosystem that reduces lead times.
Group structure and partners
Shanthi Gears is a publicly listed subsidiary controlled by Tube Investments of India, with no subsidiaries of its own - a clean, debt-free structure inside a multi-billion-dollar conglomerate.
- Parent and promoter - Tube Investments of India Limited holds 70.46% of the shares, and the company sits within the Murugappa Group, giving it access to group-wide relationships and credibility without operational entanglement.
- No downstream complexity - the company has no subsidiaries, associates, or joint ventures, so all operations flow through a single corporate entity.
- Banking and credit strength - its bankers are HDFC Bank, IDBI Bank, and Kotak Mahindra Bank, and it holds an ICRA long-term rating of [ICRA]AA (Stable) with a short-term rating of [ICRA]A1+, reflecting strong creditworthiness.