Petersburg Tram Mechanical Factory (PTMF) (Russian: Петербу́ргский трамва́йно-механи́ческий заво́д, ПТМЗ) was one of the leading manufacturers of tramcars in Russia and the CIS-countries located in Saint Petersburg. As the only tram manufacturing plant in Russia for several decades (until 1981), it was the sole supplier of rolling stock for the tram system in St. Petersburg.

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Founded in 1929 as a tram repair plant, it was rebuilt in 1933 into a tram manufacturing enterprise for the city of Leningrad (now Saint Petersburg). At that time, it produced LM and LP trams. During the ceremony for the first tram produced and leaving the plant, S. Kirov was present. By the spring of 1934 the plant was moved to Chugunnaya Street.

• By the beginning of the German-Soviet War the plant was temporarily rebuilt for producing warfare and engine repair.
• Since 1944 the plant produced trams.
• In 1966 the first 6-axle articulated tram in USSR was produced on the plant, designated as LVS-66.
• Since 1986 a serial production of LVS-86 had been started.
• In 1970-80 the plant was renamed to Leningrad plant of City Transport Repair.
• In 1993 the enterprise was privatized and incorporated and renamed St Petersburg Tram Mechanical Plant.
• Since 2003 the plants entered "Dedal" group and since 2005 came under the management of "Дедал-Вагоны" (the managing company of "vagonmash" and "St Petersburg Tram Mechanical Plant").
• As of September 2006 the plant produces LM-99 tramcars of various modifications, supplied to Saint Petersburg, Moscow, and other cities in Russia.
• In June 2006 the plant built the experimental sample LVS-2005 tramcar, which became a prototype of the new line of low-floor trams.
• In September 2007 the plant got an export contract with Odesa Electric Transport in Ukraine for supplying 11 4-axle tramcars LM-99 ЭМН.
• In 2008 the experimental usage of LM-2008 started.
• By April 2008 the plant won the open competition for supplying trams for the state needs of St Petersburg.
  • 16 6 axle "Pioneer" model 71-152,
  • 29 4 axle 71-134А "Solo".
• By the summer of 2008 the plant won the competition to supply three-section trams with a capacity of 350 people for a second turn of Volgograd Speed Tramскоростного. The first of such trams was released in 2008, with the second in May 2009.
• By the summer of 2008 St Petersburg officials stated that in 2009 they may lose the right to supply trams for St Petersburg, yet this did not happen.
• By the summer of 2009 nine four-axle LM-2008 tramcars were supplied in Saint Petersburg, and one single-ended 8-axle train in Kyiv. By the autumn of 2008 was supplied to Moscow and LVS-2005 to Barnaul. In Winter - LM-2008 to Moscow, St Petersburg, and Donetsk.
• In May 2013 went bankrupt and is currently defunct.^[1][2]

• LM-33 at Staro-Nikolsky bridge in Saint Petersburg
• LM47
• Tram LM-49 in Nizhny Novgorod electric transport museum
• LM57 in Nizhny Novgorod electric transport museum
• LM-68 in the 1st depot tramparka Leonov. Saint Petersburg
• Tram LM-68M in Saint Petersburg, Russia
• Tram LVS86 at Moskovskiye Vorota square in Saint Petersburg
• Tram LVS-93 at Vasileostrovsky depot in St. Petersburg
• Tram LVS-97 on Stachek avenue in Saint Petersburg
• Tram LM-99 on Kronverkskiy avenue in Saint Petersburg
• Tram LM-99AVN in Saint Petersburg
• LVS2005
• The 71-153 model tramcar on Belinskiy Street, Nizhny Novgorod, Russia.
• LVS-2009 in Volgograd.