In the pre-Independence era, steam locomotives were assembled and partly manufactured at Ajmer in the B.B. & C.I. Railway workshop and at Kanchanpara in the workshops of Bengal-Assam Railway. Later on, three units started producing locomotives. They are:
- Chittaranjan Locomotive Works, Chittaranjan
- The Diesel Locomotive Works at Varanasi and
- Tata Engineering and Locomotive Co., Jamshedpur
The other units are BHEL at Bhopal for manufacturing electric locomotives and Diesel component works (DCW) at Patiala (for manufacturing and repairs of components of diesel locomotives).
- The Integral Coach Factory at Peramburr near Chennai
- Bharat Movers Limited at Bengaluru and
- Rail Coach Factory at Kapurthala in Punjab
Performance of rolling stock manufacturing units
Indian railways are now manufacturing 4500 HP, STATE OF THE ART, AC-DC, microprocessor control, fuel efficient diesel locomotives at Diesel Locomotive Works (DLW), Varanasi and 6000 HP, three phase electric locomotives at Chittaranjan Locomotive Works (CLW), Chittaranjan. In 2009-10, DLW manufactured 258 locomotives which is its best ever performance. DLW also rolled out 110 HHP EMD type locomotives which is again a record. CLW manufactured 220 electric locomotives which includes 60 HHP locomotives.
Indian Railways are manufacturing LHB design high-speed light weigh coaches at Rail Coach Factory (RCF), Kapurthala. During 2009-2010, RCF achieved a record production of 1568 coaches. RCF rolled out first prototype air conditioned Double Decker coach in March 2010. RCF also produced 9 stainless steel rakes and 2 fully air-conditioned LHB rakes for running on Duronto trains. Integral Coach Factory (ICF), Chennai produced 1433 coaches including firrst High S peed Self-Propelled Accident Relief train and four rakes of DMUs with toilet facility.
Rail Wheel Factory (RWF), Bengaluru manufactured 187460 wheels, 65302 axles and 55940 wheel sets during 2009- Diesel loco Modernization Works (DMW), Patiala rebuilt
locomotives during 2009-10 against the earlier record rebuilding of 108 locomotives achieved in 2008-09.