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This is a list of [[narrow-gauge]] [[locomotives]] that have been or are being operated by [[Indian Railways]]. All railways except the heritage ones are closed or under conversion/are converted to the nation-wide standard {{RailGauge|5ft6in|lk=on}} gauge, under [[Project Unigauge]]. So narrow-gauge locomotives are operating only on the heritage routes as of 2021.

== General<ref>{{cite web |title=Diesel Locomotive Classes – Meter Gauge & Narrow Gauge |url=https://www.irfca.org/faq/faq-loco-diesel-mg.html#zdm-1 |publisher=IRFCA |access-date=13 August 2021 |archive-url=https://web.archive.org/web/20210711135723/https://www.irfca.org/faq/faq-loco-diesel-mg.html |archive-date=11 July 2021 |url-status=live}}</ref> ==

* '''ZDM-1''': This locomotive was built by Arn. Jung. These were called the class DZ on NR (Kalka-Shimla Railway). This was a narrow-gauge locomotive with 2ft 6in (762 mm) wide gauge. It was identical to NDM-1 class with 2'0" 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 used 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 were not written on the body of the loco.
*

* '''ZDM-2''': This was a narrow-gauge locomotive with 2ft 6in (762 mm) wide gauge. These loco were mainly used in Nainpur-Gondia section narrow-gauge route. All the locomotives are retired/withdrawn from service.

* '''ZDM-3''': This is a narrow-gauge locomotive with 2ft 6in (762 mm) 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 were the modified version of ZDM-3 class with an extra axle to reduce axle load (1-B-B-1 bogies). But this extra axle caused wheel slip. This locomotives can be found on routes like Kangra Valley and were found earlier on the Nagpur narrow-gauge routes and Raipur narrow-gauge routes. This iss a narrow-gauge locomotive with 2ft 6in (762 mm) wide gauge.
*'''ZDM-4A''': This was a variant of the ZDM-4 loco. This loco was used in Barsi Light Railway. These 1-B-B-1 locos had a 700hp power-pack. In 1996 one of this was sent to Nepal Jayanagar-Janakpur railway line. This was a narrow-gauge locomotive with 2ft 6in (762 mm) wide gauge.

* '''ZDM-5''': This locomotive was one of the powerful narrow-gauge locomotives of the world. This locomotives were operated on routes like Pratapnagar narrow-gauge and Dhaulpur narrow-gauge routes. Four locos of this class were sent to work on Jayanagar-Janakpur railway in Nepal in 1994. All the locomotives are retired/withdrawn from service. This was a narrow-gauge locomotive with 2ft 6in (762 mm) wide gauge.

* '''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. This is a narrow-gauge locomotive with 2ft 0in (610 mm) wide gauge. When Kalka-Shimla route was regauged ZDM-3 was obtained for that route.

* '''NDM-5''': This locomotives were used on Central Railways Gwalior narrow-gauge route. This locomotives were based on another narrow-gauge locomotive called ZDM-5. It had been equipped with dual brake system. All the locomotives are retired/withdrawn from service. This was a narrow-gauge locomotive with 2ft 0in (610 mm) wide gauge.

* '''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. This is a narrow-gauge locomotive with 2ft 0in (610 mm) wide gauge.

* '''NBM-1''': This locomotives were used on Central Railways Gwalior narrow-gauge route. This were the battery electric locomotives which are similar to [[Indian locomotive class YAM-1|YAM-1]] locomotives. Only three units were built in 1987. All the locomotives are retired/withdrawn from service. This was a narrow-gauge locomotive with 2ft 0in (610 mm) wide gauge.

== Specifications ==
{| class="wikitable"

|-
!Name !! Year !! Manufacturer !! Engine !! Transmission !! Wheels !! Power(HP) !! Speed(KM) !! Weight(tonnes) !! Starting TE (kg force) !! Quantity !! Serial No.

|-
| 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, 2009-2020<ref>{{cite web |title=Parel workshop-made first ZDM3 loco to run in Kangra Valley |url=https://mumbaimirror.indiatimes.com/mumbai/other/parel-workshop-made-first-zdm3-loco-to-run-in-kangra-valley/articleshow/76850364.cms |website=Mumbai Mirror |access-date=13 August 2021 |archive-url=https://web.archive.org/web/20200727030157/https://mumbaimirror.indiatimes.com/mumbai/other/parel-workshop-made-first-zdm3-loco-to-run-in-kangra-valley/articleshow/76850364.cms |archive-date=27 July 2020 |date=8 July 2020 |url-status=live}}</ref><ref>{{cite web |title=Indian Railways Locomotive Roster Kalka (KLK) ZDM-3 701 |url=https://www.irfca.org/apps/locos/show/10094 |publisher=IRFCA |access-date=13 August 2021 |archive-url=https://web.archive.org/web/20200727030159/https://www.irfca.org/apps/locos/show/10094 |archive-date=27 July 2020 |url-status=dead}}</ref>|| CLW, Parel || 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-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
|-
|NBM-1
|1987
|BHEL
|
|Battery electric
|Bo-Bo
|80
|
|
|
|3
|21951+
|}

== Units produced and in service ==
{| class="wikitable"
|-
! Name !! Produced !! In Service
|-
| ZDM-3 || 70 || 23
|-
| ZDM-4 || 39 || 24
|-
| ZDM-5 || 41 || 28
|-
| NDM-1 || 17 || 12
|-
| NDM-5 || 14 || 13
|-
| NDM-6 || 06 || 06
|-
| colspan="2" |'''Total locomotives in service as of July 2020'''<ref>{{cite web |title=Indian Railways Locomotive Roster List Named Loco List |url=https://www.irfca.org/apps/locos/list?list_type=named |publisher=IRFCA |archive-url=https://web.archive.org/web/20210122024352/https://www.irfca.org/apps/locos/list?list_type=named |archive-date=22 January 2021 |url-status=dead}}</ref> || 106
|}

==See also==
*[[Locomotives of India]]

==References==
{{Reflist}}

===Bibliography===
{{Refbegin}}
*{{Hughes-IndianLocos4}}
{{Refend}}

{{Narrow gauge locomotives of India|state=collapsed}}

[[Category:Locomotives of India|Narrow]]
[[Category:Arnold Jung locomotives]]
[[Category:B-B locomotives]]
[[Category:Narrow-gauge railways in India|locomotives]]

Narrow-gauge locomotives of India - Revision history

imported>GhostInTheMachine: Changing short description from "Wikimedia list article" to none (Shortdesc helper)