My son has built a very nice maple china hutch over the last two years of high school woodshop for my wife. It is about 70" wide and 84" tall. But he is having a problem attaching the Lamborghini-of-woodworking Euro Hinges to the solid 3/4" maple sides. He keeps breaking the screws.

What size screws should he use? Type?
What size pilot hole should be drilled? Is there a guide to pilot hole size vs. type of wood, similar to metal tapping guides?

Any other ideas would be helpfull. His teacher has no clue.

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Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport