Offset mounting adapter for concrete surface processing tool

A mounting adapter, as claimed in 1, wherein said first element comprises an elongate handle and said second element comprises a planar plate, wider than said handle, and extending generally perpendicularly from said handle between one end of said handle and a point intermediate the ends of said handle, said planar plate comprising means for positioning the rotational axis of rotating surface processing tools or the longitudinal axis of non-rotatable surface processing tools circumferentially offset behind said trailing side of said spider arm.

A method for mounting a surface processing tool having a rotational or longitudinal axis to at least one spider arm of a motor driven rotatable spider assembly of a surface processing apparatus, said spider arm having a top surface and a bottom surface, and a leading side and a trailing side as a function of the direction of rotation of said spider assembly, said method comprising:

• removably attaching a mounting adapter to said spider arm, said mounting adapter comprising a first element for attachment to said spider arm and a second element unitary with or connected to said first element and positioned circumferentially offset behind said first element;
• and
• attaching said surface processing tool to means on said second element for positioning the rotational axis of rotating surface processing tools or the longitudinal axis of non-rotatable surface processing tools circumferentially offset behind said trailing side of said spider arm.