Overview
57mm Gun Motor Carriage, T48
Place of Origin
United States of America
Number Built
962 (281 later converted to M3A1 Halftracks )
In Service December 1942 - 1945
Russian Designation
SU-57
Main Gun
57mm M1 on T5 mount (99 rounds)
Traverse 22.5° left & right (55° overall), manual
Elevation -5° to +15° manual
Armour Layout
6.4 - 15.9mm
Crew 5 (Commander, Gunner, Driver, Co-Driver, Loader)
Engine Characteristics
L6, 147hp@3000rpm
Transmission/Gearbox Spicer 3461 constant mesh
Gears 4 forward, 1 reverse
Fuel Capacity 227L Gasoline/petrol
Operational Range Onroad: 280km
Maximum Fording Depth 0.81m
Minimum Turning Diameter 18m
Suspension
Front: semi-elliptic longitudinal leaf spring
Rear: vertical volute spring suspension (VVSS)
Maximum Grade
31° from horizontal
Roadwheels Front: ventilated disc
Rear: 4 wheels on 1 bogie
Roadwheel Materials
Steel
Return Rollers 1 on 1 bogie
Drive Sprocket 18-tooth, front drive
Idler Sprocket Adjustable, rear
Shock Absorbers Front wheels
Track Type Central guide, band type
Track Ground Contact 1.187m
Steering System
Cam and lever, front wheels only
The 57mm Gun Motor Carriage, T48 is an American self-propelled gun halftrack developed in the 1940s. 962 specimens were produced and were originally planned for Britain to receive through lend-lease, with the intention of having them fight in the African front. By the time the T48s arrived in British hands, the campaign was over, and Britain had better vehicles suited to the role that the T48 was to fit. The British transferred 650 T48s to the Soviet Union under the Soviet Aid Program (under the name SU-57 ), 30 were kept and the rest returned to the US. All returned T48 GMCs except one were converted back into M3 halftracks.
Tracked Vehicles
Light Tanks
Tankettes
CTL (1 • 1TB1 • 2 • 3 • 3A • 3M • 3TBD • 4TAC • 4TAY • 6 )
Standard Light Tanks
CTMS-1TB1 • M1 (E2 • A1 • A1E1 ) • Light Tank, M2 (A1 • A2 • A3 • A4 ) • M3 ((early) • (late) • A1 • A3 • M5 (M5A1 ) • M22 • M24 • T1 (E1 • E2 • E3 • E4 • E5 • E6 ) • T2E1 • T2E2 • T3 • T5 (E1 • E2 ) • T7 (E1 • E2 • E3 • E4 • E5 ) • T9 (E1 ) • T13 (E1 ) • T16 • T21 • T24 (E1 ) • T37 • MTLS-1G14
Amphibious Light Tanks
LVT(A)-1 • LVT(A)-1/M24 Turret • LVT(A)-4 (early) • LVT(A)-4 (late) • LVT(A)-5
Flamethrower Light Tanks
Light Tank, M3 Satan • T65
Medium Tanks
Standard Medium Tanks
Christie M1919 • Christie M1921 • Christie M1928 • Christie M1931 • A M1921 • M1 • M2 • M2A1 • M3 Lee (A1 • A2 • A3 • A4 • A5 ) • M4 Sherman Series (M4 (early) • M4 (mid) • M4 (late) • M4 Hybrid • M4(105) • M4(105) HVSS • M4A1 • M4A1E9 • M4A1(76)W • M4A1(76)W HVSS • M4A2 • M4A2E4 • M4A2(76)W • M4A2(76)W HVSS • M4A3 • M4A3E2 • M4A3(76)W • M4A3(76)W HVSS • M4A3(105) • M4A3(105) HVSS • M4A4 • M4A5 • M4A6 ) • M7 • T2 • T3 (E1 • E2 ) • T4 (E1 • E2 ) • T5 • T6 • T15 • T20 (E3 ) • T22 (E1 ) • T23 (E3 • HVSS ) • T25 (E1 ) • T26 (E1 • E2 • E3 • E4 • E5 ) • M26 "Pershing" • M27 • M45 • MTL-1G14
Flamethrower Medium Tanks
M4A3E8 POA-CWS-H5 • M4A3R3 • M4A3R5
Heavy Tanks
Standard Heavy Tanks
T1 (E1 • E2 • E3 ) • M3 • M6 (A1 • A2 • A2E1-1 ) • T14 • T28 • T29 • T30 • T32 • T34
Gun Carriages
SPAA
T19 • M19 • M19A1 • T52 • T53 (E1 ) • T65 • T77 (E1 ) • T77E1 • T85 (E1 )
SPG
37mm T42 • 37mm T56 • 47mm M2A1 • 57mm T48 • 57mm T49 • 57mm T56 • 75mm M3 • 75mm T67 • 76.2mm M5 • 76.2mm M9 • 76.2mm M10 (A1 ) • 76.2mm M18 • 76.2mm T70 • 76.2mm T35 • 90mm M36 (B1 • B2 ) • 90mm T53 • 105mm M37 • 105mm T95 • 114.3mm T16 • 155mm M12 • 155mm M40 • 203.2mm T93
SPH
75mm Christie • 75mm Holt • 75mm T1 • 75mm T3 • 75mm M8 • 75mm T18 • 75mm T41 • 75mm T47 • 105mm M7 • 105mm M37 • 105mm T76 • 105mm T82 • 105mm T88 • 155mm Christie • 155mm M41 • 155mm T64 (E1 ) • 203.2mm M43 • 240mm T92
SPM
81mm T27 • 107mm T1 • 107mm T2 • 107mm T29 • 107mm T38 • 107mm T81
SPRA
M17 • T34 • T39 • T72 • T73 • T76 • T99 • T105 • Sd.Kfz. 251 with T34 Calliope
Utility
Cargo Carrier
T22 (E1 ) • T23
Tractor
Allis Chalmers HD10W • Caterpillar D7 • Ford T16 • Heavy Tractor, M1 • High Speed Tractor, M4 • High Speed Tractor, M5 • High Speed Tractor, M29 • International Harvester TD-18 • Light Snow Tractor, T15 • Light Snow Tractor, T24 • Light Tractor, T18 • LVT-1 • LVT-2 • LVT(A)-2 • LVT-3 • LVT-4
Prime Mover
M33 • M35
Reconnaissance
T8 (E1
Recovery & Engineering
M31 (B2 • B3 ) • T6 (E1 )
Utility
M39 • T41 (E1 )
Half-Tracked Vehicles
Transport
M2 (A1 • A2 • E6 ) • M3 (A1 • A2 • E2 ) • M5 (A1 • A2 ) • M9 (M9A1 ) T7 • T14 • T16 • T29 • T31
Trucks
T15 • T16 • T17 • T18 • T19
Amphibious Transport
T32
Gun Motor Carriages (GMC)
M3, 75mm (A1 ) • M34, 40mm T12, 75mm • T48, 57mm • T54, 40mm (E1 ) • T59, 40mm (E1 ) • T60, 40mm (E1 ) • T68, 40mm
Howitzer Motor Carriages (HMC)
T19, 105mm • T30, 75mm • T34, 105mm • T38, 105mm
Multiple Gun Motor Carriages (MGMC)
M2 Halftrack (B-6) • M13 • M14 • M15 (A1 ) • M16 (A1 ) • M17 T1 (E1 • E2 • E3 • E4 ) • T10 (E1 ) • T28 (E1 ) • T58
Mortar Motor Carriages (MMC)
81mm M4 (A1 ) • T19 • M21 • T21 (E1 )
Utility
Patton's Command Vehicle • Radio Carrier, T17 • T18 Instrument Carrier
Wheeled Vehicles
Combat Vehicles
Armoured Cars
M1 • T4 • M8 • T17 Series • T17E1 • T18 • T18E1 • T18E2 • T19 • T21 • T22 • T27 • T28 • T29 • M38 • T43
Scout Cars
M3 • M3A1 • T6 • T7 • T8 • T9 • T10 • T11 • T11E1 • T11E2
Gun Motor Carriages (GMC)
37mm M6 GMC • 75mm T66 • 76.2mm T55 (E1 )
Multiple Gun Motor Carriage (MGMC)
T17E2 • T69
Howitzer Motor Carriage (HMC)
75mm T17E3 CS
Utility
Transport & Towing
Armored Utility Car, M20 • Autocar U-8144T • Bantan BRC40 • Brockway 666 • Brockway B666 • Chevrolet 3116 • Chevrolet G-7107 • Chevrolet NK G-7113 • Dodge VC-1 • Dodge VC-2 • Dodge VC-3 • Dodge VC-4 • Dodge VC-5 • Dodge VC-6 • Dodge VF-401 • Dodge VF-402 • Dodge VF-403 • Dodge VF-404 • Dodge VF-405 • Dodge VF-406 • Dodge VF-407 • Dodge WC-1 • Dodge WC-3 • Dodge WC-4 • Dodge WC-5 • Dodge WC-6 • Dodge WC-7 • Dodge WC-8 • Dodge WC-9 • Dodge WC-10 • Dodge WC-11 • Dodge WC-12 • Dodge WC-13 • Dodge WC-14 • Dodge WC-15 • Dodge WC-16 • Dodge WC-17 • Dodge WC-18 • Dodge WC-19 • Dodge WC-20 • Dodge WC-21 • Dodge WC-22 • Dodge WC-23 • Dodge WC-24 • Dodge WC-25 • Dodge WC-26 • Dodge WC-27 • Dodge WC-36 • Dodge WC-37 • Dodge WC-38 • Dodge WC-40 • Dodge WC-41 • Dodge WC-42 • Dodge WC-43 • Dodge WC-47 • Dodge WC-48 • Dodge WC-49 • Dodge WC-50 • Dodge WF-31 • Ford 21A • Ford G8T • Ford 2G8T • Ford GP • Ford GPA • Ford Pigmy • FWD SU-COE • GMC ACKWX-353 • GMC AFWX-354 • GMC ACX-504 • GMC CCKW-352 • GMC CCKW-353 • International KR-11 • International M-5-6-318 • M25 Prime Mover • M26 Prime Mover • Mack NR15 • Reo 28XS • Studebaker US6x4 U6 • Studebaker US6x4 U8 • Studebaker US6x6 U1 • Studebaker US6x6 U2 • Studebaker US6x6 U3 • Studebaker US6x6 U4 • Studebaker US6x6 U5 • Studebaker US6x6 U7 • Studebaker US6x6 U9 • Studebaker US6x6 U10 • Studebaker US6x6 U11 • Studebaker US6x6 U12 • Studebaker US6x6 U13 • Trackless Tank, T13 • Willys MA • Willys MB (early) • Willys MB (late) • Willys MB Ambulance • White 666
Amphibious Transport & Towing
GMC DUKW-353
Bridgelaying
Brockway B666 Daybrook M-II-A Bridge Erector
Cranes & Construction
Brockway C666 Quick-Way Revolving Crane
Motorcycles
BSA M20 • Harley Davidson 42WLA • Harley Davidson 43WLC • Harley Davidson EL (ELA • ELC ) • Harley Davidson MT350 (E ) • Harley Davidson MT500 • Harley Davidson UL (ULA ) • Harley Davidson XA • Indian 741 • Indian 841 • Norton WD16H • Triumph Model H
Trailers
M15 Trailer
Tracked Vehicles
Light Tanks
Tankettes
PPG • T-17 • T-21 • T-23 • T-27
Standard Light Tanks
GAZ-70 • LTG • LTP • LTTB • NI • Obj. 211 • Obj. 217 • T-18 (M ) • T-26 (1931 • 1932 • 1933 • 1937 • 1938 • 1939 • -1 • -4 ) • T-30 • T-45 • T-50 • T-53 • T-60 (1 • 2 • ZiS-19 ) • T-70 (M ) • T-80 • T-118T • T-126 • T-127
Amphibious Light Tanks
K-90 • PT-1 (A ) • T-5Pch • T-36 • T-37 1933 • T-37 1934 • T-38 • T-39 • T-40 • T-41 • T-43 (-1 • -2 ) • TM
Flamethrower & Chemical Light Tanks
KhBT-7 • OT-7 • OT-26 • OT-130 • OT-131 • OT-132 • OT-133 • OT-133E • OT-134
Remote Controlled Light Tanks
TTBT-7 • TT-26 • TU-26
Utility Light Tanks
BT-DT • SBT
Cavalry/Fast Tanks
A-8 • A-20 • BDT-1 • BT-1 • BT-2 • BT-2IS • BT-3 • BT-4 • BT-5 (A • IS • PKh ) • BT-5IS • BT-6 • BT-7 • BT-7M • BT-20 • D-38 • MT-25 • T-46
Lend-Lease Lights
Tetrarch • M3A1 Stuart • M24 Chaffee
Command Light Tanks
BT-TU • KBT-7 • T-26PT (early) • T-26PT (late)
Medium Tanks
Standard Medium Tanks
A-20 • A-32 • A-34 • A-43 • KV-13 • T-22 • T-24 • T-28 (1932 • 1934 • 1938 • E 1938 • 1940 • M • 85 • 95 ) • T-29 • T-34 Series • T-34 M1940 • T-34 M1941 • T-34E M1941 • T-34 M1941/1942 • T-34 M1942 • T-34 M1942/1943 • T-34 M1943 • T-34 M1943/1944 • T-34M • T-34M M1942 • T-34-57 M1941 • T-34-57 M1943 • T-34-57 M1944 • T-34-85 M1943 (early) • T-34-85 M1943 (late) • T-34-85 Model 1944 • T-43 • T-44 • T-112
Lend-Lease Mediums
Matilda II • Matilda IV • M4A2 "Sherman" • M4A2(76)W "Sherman"
Flamethrowing Medium Tanks
OT-28 • OT-34 M1941 • OT-34 M1942 • OT-34-85
Heavy Tanks
Standard Heavy Tanks
A-7 • IS-1 • IS-100 • IS-2 • IS-3 • IS-4 • IS-6 • IS-7 • KV-1 (1939 • 1940 • E 1940 • 1941 • 1942 • S 1942 ) • KV-3 • KV-4 • KV-5 • KV-7 • KV-9 • KV-10 • KV-11 • KV-85 • KV-100 • KV-122 • KV-220 • KV-221 • KV-222 • SMK • T-32 • T-35-1 • T-35-2 • T-35A • T-35B • T-39 • T-100 • T-150 • U-14
Flamethrowing Heavy Tanks
KV-8 • KV-8S • KV-8M • KV-12
Self-Propelled Guns
SPAA
GAZ-72 • SU-8 • SU-11 • SU-17 • SU-72 • T-60-Z • T-70-Z • T-90 • ZSU-37 • ZUT-37
SPATG
GAZ-71 • ISU-122 (-1 • -2 • -3 • S ) • KhTZ-16 • OSU-76 • SU-26 • SU-31 • SU-71 • SU-76 • SU-76i • SU-85 • SU-85B • SU-85i • SU-85M • SU-100 • SU-100U • SU-101 • SU-102 • SU-122P • SU-122-44 • ZiS-30
SPG
BT-5A • BT-5AT • BT-7A • ISU-130 • ISU-152 (-1 • -2 ) • KV-2 (107 ) • KV-14 • OSU-76 • SU-1 • SU-3 • SU-6 • SU-7 • SU-10 • SU-14-2 • SU-18 • SU-45 • SU-122 (-3 • M ) • SU-130 • SU-152 • T-26-4
SPH
AT-1 • S-51 • SU-2 • SU-5 (-1 • -2 • -3 ) • SU-14
SPRA
BM-8-24 • KV-10 • RBT-5
Miscellaneous
Bridge-related
IT-26 • IT-28 • ST-26
Transport & Towing
ATP • HTZ Komunar • Komitern • Stalinets 2 • S-60 • S-65 • STZ-5 Stalingradec • T-20 Komsomolets • T-26T • T-26T2 • Voroschilovets • YA-12
Half-Tracked Vehicles
Combat
Armoured Cars
BA-30 • BA-64Z
SPAA
M15A1 CGMC • ZiS-42 • ZSU-17
SPATG
GAZ-TK • SU-57 • ZiS-41
Utility
Transport
Autocar 2½-ton Halftrack • B-3 • GAZ-60 • M2 Halftrack • M5 Halftrack • NATI-3 • ZiS-22 • ZiS-33 • ZiS-35Sh • ZiS-42 • ZiS-42M
Wheeled Vehicles
Combat
Armoured Cars
BA-I • BA-3 • BA-5 • BA-6 (M ) • BA-9 • BA-10 (M ) • BA-11 (D ) • BA-20 • BA-21 • BA-27 (M ) • BA-64 • BA-NATI • BAD • BAD-2 • D-8 • D-12 • D-13 • FA-2 • FAI (M ) • GAZ-TK • PB-4 • PB-7 • LB-23 • LB-62
Railroad Armoured Cars
BA-6 ZhD • BA-10 ZhD (M ) • BA-20 ZhD • BA-64 ZhD • BAD-2 ZhD • FAI ZhD
SPAA
94-KM SPAAG • Chevrolet G7107 SPAAG • GAZ-AAA SPAAG
SPATG
KSP-76 • SD-57 (N ) • ZiS-31
SPH
SU-1-12 • SU-12
SPG
SU-4
SPRA
BM-13-16
Utility
APC
BA-64E
Medical
BA-22
Motorcycles
BSA-M20
Transport
GAZ-63
Trailers
KP-42 • KP-43
Land Vehicles of the United States of America 
Soviet Land Vehicles 
