Scroll compressor with complex fillets between eccentric pin and shaft shoulder

A scroll compressor comprising:

• a first scroll member having a base and a generally spiral wrap extending from said base;
• a second scroll member having a base and a generally spiral wrap extending from said base, said wraps of said first and second scroll members interfitting to define compression chambers;
• a shaft driven to rotate by an electric motor, said shaft extending upwardly to cause said second scroll member to orbit relative to said first scroll member, said shaft having an eccentric pin extending upwardly into a slider block, said slider block received within a boss extending rearwardly from said base of said second scroll member, and said eccentric pin having a curved portion over a portion of an outer circumference of said eccentric pin and a generally flat portion over another portion of said circumference of said eccentric pin, with said curved portion and said generally flat portion extending upwardly from an end shoulder of said shaft, with fillets defined between said generally flat portion and said end shoulder, and said curved portion and said end shoulder, with at least one of said fillets having a complex shape with more than one radius of curvature.