Arbor assembly

An arbor assembly (10) for mounting a cutting tool (14) to a spindle (12), comprising:

• a spindle adapter (16) having an upper surface (32), a lower surface (38), a planar sidewall (46) disposed between said upper and lower surfaces (32,38), and a stepped wall portion (50) defining a first opening (52) adjacent said planar sidewall (46), a second opening (54) adjacent said lower surface (38), and a centrally disposed cavity (56) extending inwardly of said sidewall (46) and said lower surface (38);
• a cutting tool adapter (18) having an upper surface (60), a lower surface (62), a pair of planar sidewalls (72,74) disposed between the upper and lower surfaces (60,62), and a stepped wall portion (76) extending outwardly of said pair of sidewalls (72,74) and of said lower surface (62), and being of a construction sufficient for alignably mating with the cavity (56) defined by the stepped wall portion (50) of the spindle adapter (16);
• means (80) for mounting the spindle adapter (16) to the spindle (12);
• means (84) for mounting said cutting tool adapter (18) to said spindle (16) and maintaining the planar sidewall (46) of the spindle adapter (16) in an abutting relationship with the pair of planar sidewalls (72,74) of the cutting tool adapter (18), and
• means (29) for mounting the cutting tool (14) to said arbor assembly (10).