A low-angle weapon intended for surface action, this gun armed all of the German destroyers built before the start of World War II and a few war-built ones. There was also a twin mount planned for the never-built Type XI U-boats (U-Kreuzer).
At least eight of these guns were exported to Greece for arming the destroyers of the Vasilevs Georgios class.
Early guns were bored-out versions of the 10.5 cm/55 (4.1") SK C/28. The production guns were constructed of a loose barrel, jacket and breech end piece with a vertical sliding breech block.
Some of these guns were still in service as of 2003 in coastal defense units in Norway.
All German 12.7 cm guns had an actual bore diameter of 12.8 cm (5.04 in).
|Designation||12.7 cm/45 (5") SK C/34|
|Ship Class Used On 1||
|Date Of Design||1930|
|Date In Service||1934 3|
|Gun Weight||8,036 lbs. (3,645 kg) 4|
|Gun Length oa||226.8 in (5.760 m)|
|Bore length||213.8 in (5.430 m)|
|Rifling Length||178.6 in (4.536 m)|
|Grooves||(40) 0.059 in deep x 0.236 in (1.5 mm x 6.0 mm)|
|Lands||0.157 in (4.0 mm)|
|Twist||Increasing RH 1 in 35 to 1 in 30|
|Chamber Volume||744 in3 (12.19 dm3)|
|Rate Of Fire||15 - 18 rounds per minute 5|
- ^This weapon was also planned for the Type 1938B Destroyers and the Type 1940 (T61) torpedo boats.
- ^Guns designed for the Type XI U-Boats weighed 10,196 lbs. (4,625 kg) due to their increased breech end weights.
- ^Converted 10.5 cm (4.1") SKC/28 guns weighed 7,848 lbs. (3,560 kg).
- ^This weapon was designed for a ROF of 18 - 20 rounds per minute, but the above figure was typical for well-trained crews. As these were open mounts, bad weather or Arctic conditions could greatly reduce the ROF.
|Weight of Complete Round||N/A|
|Projectile Types and Weights 1||HE, base fuze: 61.7 lbs. (28.0 kg)
HE, nose fuze: 61.7 lbs. (28.0 kg)
ILLUM: 60.4 lbs. (27.4 kg)
|Bursting Charge||HE, base fuze: about 3.0 lbs. (1.4 kg) Fp02 (TNT)
HE, nose fuze: about 4.5 lbs. (2.0 kg) Fp02 (TNT)
|Projectile Length||22.2 in (56.5 cm)|
|Propellant Charge||19.2 lbs. (8.7 kg) RPC/38 (6.4/2.6)
Cartridge: 35.3 lbs. (16 kg)
|Muzzle Velocity||HE: 2,723 fps (830 mps)
ILLUM: 2,133 fps (650 mps)
|Working Pressure||18.7 tons/in2 (2,950 kg/cm2)|
|Approximate Barrel Life||1,950 rounds|
|Ammunition stowage per gun||Z1, Z17 and Z35 classes: 120 rounds 2
Leopard and Luchs: 100 rounds
T61: 150 rounds
Type XI U-boats: 270 rounds
Grille and Bremse: N/A
Vasilevs Georgios: 192 rounds
Both nose and base fuzed HE were 8.6crh.
- ^Nammo Raufoss produced an anti-ship projectile (ASP M88) starting in 1989. This projectile has the same interior and external ballistics as the earlier German rounds. The projectile weighs 61.7 lbs. (28.0 kg) and has a bursting charge of 7.0 lbs. (3.2 kg).
- ^Outfits for destroyers were nose and base fuzed HE with and without tracer and 80 illumination rounds per ship.
|Weight||LC/34: 22,487 lbs. (10,220 kg)
LC/38: 93,035 lbs. (42,200 kg)
|Elevation||LC/34: -10 / +30 degrees
LC/38: -10 / +40 degrees
|Elevation Rate||Hand operated, only|
|Train Rate||Hand operated, only|
- "Naval Weapons of World War Two" by John Campbell
- "Jane's Ammunition Handbook: Ninth Edition 2000-2001" edited by Terry J. Gander and Charles Q. Cutshaw
- "German Warships 1815-1945" by Erich Gröner
- "The German Navy in World War II" by Robert Jackson
- "Die Geschichte der deutschen Schiffsartillerie" by Paul Schmalenbach
- "German Naval Guns: 1939 - 1945" by Miroslaw Skwiot
- "German Warships of World War II" by J.C. Taylor
- "German Destroyers of World War Two (2nd Edition)" and "Destroyers of World War Two: An International Encyclopedia" both by M.J. Whitley