T-34 variants

Main article: T-34

T-34 variants
T-34 family portrait, 1941 (BT-8, A-20, T-34 Models 1940 and 1941)
Type	Medium tank
Place of origin	Soviet Union
Service history
In service	1940– 1970s (USSR)
Production history
Produced	1940–1956 (USSR)
Number built	about 84,070

T-34 tank

T-34 variants SU-85 SU-100 SU-122 T-43 Type 63

The T-34 medium tank is one of the most-produced and longest-lived tanks of all time.

Identification of T-34 variants can be complicated. Turret castings, superficial details, and equipment differed between factories; new features were added in the middle of production runs, or retrofitted to older tanks; damaged tanks were rebuilt, sometimes with the addition of newer-model equipment and even new turrets.^[1] Some tanks had appliqué armor made of scrap steel of varying thickness welded on to the hull and turret; these tanks are called s ekranami ("with screens"), although this was never an official designation for any T-34 variant.

T-34 model 1941 s ekranami, manufactured at STZ, with appliqué armour welded to the hull.

Model naming

German intelligence in World War II referred to the two main production models as T-34/76 and T-34/85, with minor models receiving letter designations such as T-34/76A—this nomenclature has been widely used in the west, especially in popular literature. Since at least the 1980s, many academic sources (notably AFV expert Steven Zaloga) have used Soviet-style nomenclature: T-34 and T-34-85, with minor models distinguished by year: T-34 Model 1940. (This page has adopted that convention.)

Since the break-up of the Soviet Union, newly declassified sources have demonstrated that all T-34s with the original turret and F-34 gun (conventionally known as Models 1941 and 1942) were officially called "Model 1941", and hexagonal-turret T-34 (Model 1943) was officially called "Model 1942".

Because many different factories manufactured T-34s, with components built by subcontractors, the listing below merely gives a broad overview and does not capture every possible variant. Also, not every factory implemented all model changes at the same time. For example, factory No. 112 continued building narrow-turret 76 mm armed models long after all other plants had switched to hexagonal-turreted tanks.

List of models and variants

The original T-34 Model 1940 can be recognized by the low-slung barrel of the L-11 gun, below a bulge in the mantlet housing its recoil mechanism. This particular vehicle is a pre-production A-34 prototype, recognizable by the small driver's hatch and single-piece front hull.

Soviet Union

Tanks

The model 1942 had an all-new hexagonal turret with bulbous trunnion housing.

A commander's cupola was added during the model 1942 production run to improve all-round vision. This variant was known as T-34 Model 1943.

T-34-85 with D5T gun, manufactured at Factory 112.

The T-34-85 had a larger three-man turret, with a long 85 mm gun.

T-34
- Model 1940 (German designation: T-34/76A) - This was a production model built in 1940, armed with a L-11 76.2 mm tank gun; it had a welded or cast two-man turret. Due to a shortage of new V-2 diesel engines, the initial production run from the Gorky factory was equipped with the BT tank's MT-17 gasoline-powered engine and an inferior transmission and clutch (Zheltov 2001:40–42).
- Model 1941 (T-34/76B) - This production model was built in 1941, with a heavier armor, a cast or welded two-man turret, and the superior F-34 tank gun.
- Model 1942 (T-34/76C) - This was a production model built in 1942, with increased armor protection and many simplified components. It had new 'waffle' tracks, new wheel patterns, a new driver's hatch and a round transmission access cover. Some had the headlight moved to the left side of the hull. Most were equipped with cast two-man turrets although a few welded ones remained.
- Model 1943 (T-34/76D, E, and F) - This production model was built from May 1942 to 1944, with a cast or pressed hexagonal turret. It was nicknamed "Mickey Mouse" by the Germans because of its appearance with the twin round turret roof hatches open. Official Soviet military designation was Model 1942. Turrets manufactured in different factories had minor variations, sometimes called "hard-edge", "soft-edge", and "laminate" turrets, but in military service these details did not warrant different designations.
  - Earlier production is sometimes called Model 1942/43, and was designated T-34/76D by German intelligence.
  - Later production variants had a new commander's cupola. This variant was referred to as T-34/76E by the Germans.
  - Turrets produced at Uralmash in Sverdlovsk (Yekaterinburg) had a distinctive rounded appearance because they were made in a special forge. Tanks produced with these turrets there and at Chelyabinsk were called T-34/76F by the Germans.^[2]
- T-34/57 - A very small number of T-34s were fitted with the ZiS-4 L/73 high-velocity 57 mm gun in 1941 and 1943 to be used as tank destroyers. This gun had better penetration than the 76.2 mm F-34 (140 mm of steel at 500 m, as opposed to 90 mm), but the small HE projectile was inadequate for use against unarmored targets.
- OT-34 - This was a T-34 flame-thrower tank fitted with an internally mounted flamethrower replacing the hull machine-gun. Usually it was a modified Model 1941 with the ATO-41 flamethrower or Model 1942 with ATO-42.
T-34M - This unit was a prototype (A-43) with improved armor, hexagonal three-man turret, torsion bar suspension, sprung road wheels, and increased fuel and ammunition storage. Five hulls were built, but development was abandoned when the war broke out.
T-34-85
- Model 1943 - This production model was built from February to March 1944 at Zavod 112, with the 85 mm D-5T gun and a new larger cast three-man turret, a commander's cupola and two dome-shaped ventilators clustered together on top of the turret.
- Model 1944 - This was a production model built from March 1944 to the end of 1944, with the simpler 85 mm ZiS-S-53 gun. The radio was moved from the hull into the turret and the commander's cupola was moved rearward. There was an improved layout and a new gunner's sight.
- Model 1945 - This was a production model built in 1944-45, with an electrically powered turret traverse motor, an enlarged commander's cupola with a one-piece hatch, squared front fenders, and the TDP (tankovoy dimoviy pribor) smoke system with electrically detonated MDSh canisters.
- Model 1946 - This was a production model built in 1946, with the improved V-2-34M engine, new wheels and other minor details.
- Model 1960 - A refurbishing program introduced a new V-2-3411 engine and an improved air cleaner, a cooling and lubrication system, a battery generator, new BDSh smoke canisters, an infrared headlight, a driver's sight and a 10-RT radio set instead of the old 9-R.
- Model 1969 (also called T-34-85M) - This was a refurbishing program introducing the new R-123 radio set, 'starfish' road wheels similar to those on the T-54/55 tank, night driving equipment, drivetrain improvements, repositioned or removed smoke canisters to make a space for additional 200-litre external fuel tanks and a ditching beam at the rear. An external fuel pump was added to ease refueling.
- OT-34-85 (sometimes called TO-34) - This was a T-34-85 flamethrower tank, with the ATO-42 in place of the bow machine gun.

Tank destroyers

SU-85 was a T-34-based tank destroyer armed with an 85 mm D-5T gun.
SU-100 was a T-34-based tank destroyer armed with a 100 mm D-10S gun.

Self-propelled howitzers

SU-122 - This unit was a T-34 based self-propelled howitzer armed with a 122 mm M-30S howitzer.

Support vehicles

SPK-5 crane tank in Batey ha-Osef Museum, Tel Aviv, Israel, 2005

PT-34 - This was a mine roller tank, mostly built on the T-34 Model 1942 or T-34-85 chassis.
T-34-T (T after T-34- stands for tyagach ["tractor"]) - During World War II, some old, battle damaged T-34 medium tanks were rebuilt as armored recovery vehicles (ARVs) with their turret removed; sometimes the turret ring was plated over or a superstructure was added in place of the turret. They were used solely for towing operations. It is also known under designation TT34.
SPK-5 (1955) - This was a turretless T-34 fitted with a crane with a capacity of 10 tons on a rotatable mount fitted in the turret ring.
- SPK-5/10M - An SPK-5 was fitted with electro-hydraulic controls for the crane.
T-34-TO (1958) (TO after the T-34- stands for technicheskoye obsuzhivaniye ["technical maintenance"]) - This variant was a technical maintenance vehicle fitted with an extensive array of tools and a work platform over the engine deck.

Bulgaria

Fixed fortifications

T-34-85 turrets were built into a bunker to create a fixed piece.

Cuba

Self-propelled howitzers

T-34-85 were converted into a self-propelled howitzer armed with a 122 mm D-30 howitzer in a cut-away turret.

T-34-85CZ.