Narrow-gauge locomotives of India
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 NDM1a No. 500 at the head of a train departing to Matheran at Neral station. | |||||||||||||||||||
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The NDM and ZDM series locomotives are narrow gauge locomotives of Indian Railways. Narrow gauge locomotives are becoming very rare. Most of the routes are converted into broad gauge or either it is closed. Few routes are still there. But within those routes heritage routes will be there, other than that rest of the routes will be converted to broad gauge because Indian Railways has taken the initiative of Unigauge of the whole network.
Locomtives:
* NDM-1: This is a articulated locomotive with two prime movers. But in case of uphill travel it uses its both engines and in case of downhill it uses one engine on Neral-Matheran line. It was originally intended to be used in Kalka-Shimla route. When Kalka-Shimla route was regauged ZDM-3 was obtained for that route.
* NDM-5: This locomotives are used on Central Railways Gwalior narrow gauge route. This locomotives are based on another narrow gauge locomotive called ZDM-5. It has been equipped with dual brake system.
* NDM-6: This locomotive was originally intended for Matheran Light Railway but due to some reason it was then allocated to Darjeeling Himalayan Railway. Only 6 of these locomotives have been made and all are in service on Darjeeling Himalayan Railway.
* ZDM-1: This locomotive was built by Arn. Jung. These were called the class DZ on NR (Kalka-Shimla Railway).It is identical to NDM-1 class with 2'6" gauge. Only four of these locos were regauged to 2'0" gauge and converted to NDM-1 units. When the ZDM-3 locos were available in (1972-1982). The fifth loco NR #704, was at Pragati Maidan in New Delhi. Where it was used to haul a short train of aluminium-bodied coaches on a 1.5km figure-8 track at a exhibition centre. Loco numbers doesn't written on the body of the loco.
* ZDM-2: This is a narrow gauge locomotive with 2ft 6in wide gauge.These loco were mainly used in Nainpur-Gondia section narrow gauge route.Now all the locomotives are retired/withdrawn from service.
* ZDM-3: This is a narrow gauge locomotive with 2ft 6in wide gauge of Indian Railways.This locomotives can be found on the routes of Kalka-Shimla route and Kangra Valley route.
* ZDM-4: This locomotives were built by CLW and they are the modified version of ZDM-3 class with an extra axle to reduce axle load (1-B-B-1 bogies). But this extra axle cause wheel slip.This locomotives can be found on routes like Kangra Valley,Nagpur narrow gauge route and raipur narrow gauge route.
ZDM-4A:This is a variant of the ZDM-4 loco. This loco was used in Barsi Light Railway. These 1-B-B-1 locos have a 700hp power-pack. In 1996 one of this was sent to Nepal Jayanagar Janakpur railway line.
* ZDM-5: This locomotive was one of the powerful narrow gauge locomotive of the world .This locomotives can be found on routes like Paratapnagar narrow gauge and Dhaulpur narrow gauge routes. Four locos of this class was sent to work on Jayanagar Janakpur railway in Nepal in 1994.
Specifications:
| Name | Year | Manufacturer | Engine | Transmission | Wheels | Power(HP) | Speed(KM) | Weight(tonnes) | Starting TE (kg force) | Quantity | Serial No. |
|---|---|---|---|---|---|---|---|---|---|---|---|
| NDM-1 | 1955 | Arn. Jung | MWM TRHS 518S, 145/128hp | Twin Voith hydraulic | B+B | 2x145 | 33/16 | 29 | 8790 | 7 | 500-506(500, 504-506 ex-ZDM-1) |
| NDM-5 | 1987-89 | CLW | KCL KTA-1150L, 450hp | Voith hydraulic | B-B | 450 | 50 | 22 | 11 | 801-811 | |
| NDM-6 | 1997 | (SAN) Engg. and Loco Co. | Kirloskar-Cummins NTA 855L | Voith hydraulic | B | 335 | 30 | 17.2 | 6 | 600-605 | |
| ZDM-1 | 1955 | Arn. Jung | MWM TRHS 518S, 145/128hp | Twin Voith hydraulic | B+B | 2x145 | 33 | 29 | 8790 | 5 | 543-547 |
| ZDM-2 | 1964-65 | Maschi-nenbau Kiel | Maybach V8 MD435 | Voith hydraulic | B-B | 700 (650 net) | 50 | 32 | 10560 | 25 | 123-147 |
| ZDM-3 | 1970-82 | CLW | Mak/CLW 6M 282 A(K) | Suri hydromechanical transmission | B-B | 700 | 50 down / 32 up | 35 | 10500 | 40 | 148-167/178-187/168-177 (ex-ZDM-4) |
| ZDM-4/4A | 1975-77/1982-90 | CLW | Mak/CLW 6M 282 A(K) | Voith hydraulic | 1-B-B-1 | 700 | 50 | 39 | 7800 | 10/39 | 4: 168-177(later rebuilt as ZDM-3)/4A: 198-236 |
| ZDM-5 | 1989+ | CLW | KCL KTA-1150L | Voith hydraulic | B-B | 450 | 50 | 23 | 41+ | 501+ |
NDM and ZDM series locomotives
| Name | Produced | In Service |
|---|---|---|
| NDM-1 | 17 | 12 |
| NDM-5 | 14 | 13 |
| NDM-6 | 06 | 06 |
| ZDM-3 | 70 | 23 |
| ZDM-4 | 39 | 24 |
| ZDM-5 | 41 | 28 |
| Total locomotives in service as of June 2020[4] | 106 | |
See also
- Indian Railways
- Indian Locomotives
- Indian locomotive class WDM-2
- Indian locomotive class WAP-4
- Indian locomotive class WAP-5
- Indian locomotive class WAP-7
- Indian locomotive class WAG-9
References
Bibliography
- Hughes, Hugh (1996). Indian Locomotives: Part 4 – 1941–1990. Harrow, Middlesex: The Continental Railway Circle. ISBN 0-9521655-1-1. OCLC 35135033.
- Indian narrow gauge diesel loco information
External links
| Steam (2 ft 6 in (762 mm)) |
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| Steam (2 ft (610 mm)) |
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| Diesel (2 ft (610 mm)) | |||||||
| Battery (2 ft (610 mm)) | |||||||