A machine for excavating rock, the machine comprising: a frame; a cutting device (22, 422, 822, 1222) including a shaft (126, 926, 1326) and a cutting disc (102, 902, 1302) having a cutting edge, the cutting disc (102, 902, 1302) supported for free rotation relative to the shaft (126, 926, 1326) about a cutting device axis; and a boom supporting the cutting device (22, 422, 822, 1222), the boom including a first end, a second end, and a boom axis substantially parallel to the cutting device axis, the boom further including a first portion (70, 470) and a second portion (74, 474), the first portion (70, 470) coupled to the frame for rotation about a first pivot axis between a raised position and a lowered position, the second portion (74, 474) coupled to the cutting device, the second portion (74, 474) pivotable about a second pivot axis between a raised position and a lowered position, wherein the shaft (126, 926, 1326) includes a first portion and a second portion connected to an end of the first portion, the first portion rotatable about a shaft axis, the second portion extending along a second axis that is oblique with respect to the shaft axis, the cutting disc (102, 902, 1302) supported on the second portion for rotation about the cutting device axis, wherein the cutting device (22, 422, 822, 1222) further includes an exciter shaft (154, 1354) and an eccentric mass (158, 1358) supported on the shaft (126, 926, 1326), the exciter shaft (154, 1354) positioned adjacent the first portion of the shaft (126, 926, 1326) and rotating about an exciter axis, rotation of the exciter shaft (154, 1354) and eccentric mass (158, 1358) inducing an oscillation of the shaft (126, 926, 1326) and the cutting disc (102, 902, 1302). a frame; a cutting device (22, 422, 822, 1222) including a shaft (126, 926, 1326) and a cutting disc (102, 902, 1302) having a cutting edge, the cutting disc (102, 902, 1302) supported for free rotation relative to the shaft (126, 926, 1326) about a cutting device axis; and a boom supporting the cutting device (22, 422, 822, 1222), the boom including a first end, a second end, and a boom axis substantially parallel to the cutting device axis, the boom further including a first portion (70, 470) and a second portion (74, 474), the first portion (70, 470) coupled to the frame for rotation about a first pivot axis between a raised position and a lowered position, the second portion (74, 474) coupled to the cutting device, the second portion (74, 474) pivotable about a second pivot axis between a raised position and a lowered position, wherein the shaft (126, 926, 1326) includes a first portion and a second portion connected to an end of the first portion, the first portion rotatable about a shaft axis, the second portion extending along a second axis that is oblique with respect to the shaft axis, the cutting disc (102, 902, 1302) supported on the second portion for rotation about the cutting device axis, wherein the cutting device (22, 422, 822, 1222) further includes an exciter shaft (154, 1354) and an eccentric mass (158, 1358) supported on the shaft (126, 926, 1326), the exciter shaft (154, 1354) positioned adjacent the first portion of the shaft (126, 926, 1326) and rotating about an exciter axis, rotation of the exciter shaft (154, 1354) and eccentric mass (158, 1358) inducing an oscillation of the shaft (126, 926, 1326) and the cutting disc (102, 902, 1302).