Date of first acceptance January 1943 Total acceptances 12
Manufacturer · Fisher Tank Arsenal · Baldwin Locomotive Works
Crew 6 men:· Commander in turret · Gunner in turret ·
Loader in turret · Driver in hull left front · Assistant driver in hull right front ·
Bow machine gunner in hull right front
M6A1: Dimensions
Combat weight 126,300lbs 57,300kg Height 127" 323cm
Length without gun 297" 754cm Gun overhang forward 35" 89cm
Width 122.5" 311.2cm Tread 93" 240cm
Ground clearance 21" 53cm Turret ring diameter 69" 175cm
M6A1: Armament
Type Mount Ammunition Traverse Elevation
3" Gun M7 In turret 75 rounds 360°(manual or electrical) +30° to -10
37mm Gun M6 Coaxial to 3" gun 202 rounds 360°(manual or electrical) +30° to -10
.50cal M2HB MG AA mount 5700 rounds Manual Manual
Two .50cal M2HB MGs Right bow Manual Manual
Stabilizer
Elevation only
M6A1: Armor
Assembly
Welding
Maximum 4" 10cm Minimum 1" 2.5cm
Hull Rolled homogeneous steel
Turret Cast homogeneous steel
M6A1: Automotive
Engine Wright G-200; 9 cylinder, 4 cycle, radial gasoline
Horsepower Gross: 900@2300rpm Fuel capacity 477gal 1810L
Transmission Torqmatic
M6A1: Suspension
Type Road wheels
Horizontal volute spring 4 double bogies/track;4 wheels/double bogie
Drive sprockets Idlers
Rear drive Adjustable at front of track;auxiliary track tension wheel behind idler
M6A1: Track
T31
Dual outside guide, double pin, steel
Width 25.75" 65.41cm Pitch 6" 15cm Shoes/track 99 Ground contact length 188" 478cm
M6A1: Performance
Max level road speed 22mph 35kph Max trench 132" 335cm
Max vertical obstacle 36" 91cm Max fording depth 48" 120cm
Cruising range ~100mi, roads ~160km, roads
The M6A1 was identical to the M6 except for the M6A1's welded versus cast hull.
Although never standardized, twenty heavy tanks T1E1 were built and were unofficially called "M6A2." This variant had a cast hull like the heavy tank M6, but was built with an electric transmission that was later tested in the medium tank T23.