Root radius at 75° tang. rel. to m_n

Symbol	-
Unit	-
Attribute-ID	dnv2003 root radius at 75 tang rel to m_n
Numeric ID	914
Value Type	PMDouble

This must only be specified for thin gear rings with s_r/m_n < 3.5.

The fillet radius at 75° tangent relative to m_n is preset to the tip edge radius of the tool $σ$ _a0*.