cylindric spiral gear

hi,

  I have successfully created two cylindric spiral gears by toolbox. But I can't  add correct mates to the two cylindric spiral gears. I tried to add mates  in a way which I did with the spur gears. But it didn't work and the assembly always exsited interferes.I am stuck in the problem for a long time.

Hopefully this is an easy problem for all of the experts - thanks in advance for your help;

Huang

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