Wall saw and interchangeable assemblies for wall saws

An interchangeable concrete cutting chainsaw cutting assembly adapted for installation upon a drive assembly in exchange for a removed, different type cutting head assembly, said chainsaw cutting assembly comprising:

• a housing having fasteners that releasably attach said housing to a drive assembly in an installed configuration;
• a ratio transmission comprising a plurality of interconnected rotatable members, each rotatable member having a mounting shaft positioned at a fixed location on said housing by a bearing assembly;
• said plurality of rotatable members comprising a round, disk-shaped driven member and a round, disk-shaped cutting chain drive member, said driven member having a circumference at least twice as long as a circumference of the cutting chain drive member;
• said driven member having a receiver that interconnects with a driveshaft of the drive assembly in the installed configuration whereby said driven member is rotated by the drive assembly;
• a chain bar attached to said housing;
• a drive sprocket and nose sprocket, at least one of which is rotatably mounted on said chain bar and a cutting chain suspended on said drive sprocket and nose sprocket for circulation about said chain bar;
• and
• said cutting chain drive member operatively interconnected with said drive sprocket whereby rotation of said cutting chain drive member rotates said drive sprocket.