45mm SM-21-ZIF
Introduction
45mm SM-21-ZIF
Frontal view of 45mm SM-21-ZIF naval anti-aircraft gun mount.
Source: Unknown author -
© Copyright lies with original owner
Origin
Soviet Union
Type
Naval gun
Entered service
1954
Status
Obsolete
Development
1946 - 1949 (SM-7 / ZIF-21 autocannon)
1949 - 1950 (SM-21-ZIF gun mount)
1949 - 1950 (SM-21-ZIF gun mount)
Developer
Soviet Union
-
TSkB-7
Production
1951 - 1957
Producer
Soviet Union
-
No.7 Arsenal factory, St Petersburg
Number produced
17 SM-21-ZIF gun mounts
(possibly more given number of ships it was used on)
(possibly more given number of ships it was used on)
Designations
45mm СМ-21-ЗИФ (Cyrillic)
45-мм автоматическая установка 1954г.
Russian for "45mm automatic gun mount model 1954"
45-мм автоматическая установка 1954г.
Russian for "45mm automatic gun mount model 1954"
Notable users
Soviet Union
Details
Facts
SM-21-ZIF
General
Origin
Soviet Union
Type
Naval anti-aircraft gun
Ordnance
Type
45mm ZIF-21 L/78 autocannon
Rate of fire
135 - 160 rpm cyclic
Range
11.1 km maximum horizontal
9.1 km practical horizontal
5 km altitude
Gun length
4.02 m
Barrel length
3.5 m
Muzzle velocity
1.080 m/s
Barrel life
1.300 - 1.400 rounds
Mount
Feed mechanism
Automatic loading
Ammunition
Single feed tray for 16 rounds
Fed by 4 round clips
Traverse
360°, powered or manual
Traverse rate
40°/s powered, 12°/s manual
Elevation
-10° to +85°, powered or manual
Elevation rate
25°/s powered, 12°/s manual
Operation
Crew
5 crew per mount for ammunition handling and local fire control
Fire control
Local control: AMZ-45-1AM sight
Dimensions
Weight
3.6 t
Deck penetration
No
Protection
Armor type
Steel
Armor thickness
10 mm front
8 mm sides
Related articles
45mm SM-20-ZIF
The SM-21-ZIF uses the same barrel and ammunition as the much larger quad 45mm SM-20-ZIF gun mount. Its larger counterpart also had external control via radar, whereas the single barre SM-21-ZIF is local control only.