Patent ID: 8882564

Claim:
Gear grinding machine with a stationary machine bed ( 1 ), with a first linear-motion unit ( 15 ) movable relative to the machine bed ( 1 ) along a first linear-motion axis (Z 1 ) and carrying a first swivel-motion unit ( 17 ), the latter being arranged on the first linear-motion unit ( 15 ) so as to be able to swivel about a first swivel-motion axis (A 1 ) that is orthogonal to said first linear-motion axis (Z 1 ), and further with a tool spindle ( 18 ) arranged on the first swivel-motion unit ( 17 ) so as to be able to be driven in rotary motion about a tool spindle axis (B 1 ) that is orthogonal to said first swivel-motion axis (A 1 ), characterized in that on the first linear-motion unit ( 15 ), a second linear-motion unit ( 19 ) is arranged which is movable along a second linear-motion axis (Z 2 ), and that on said second linear-motion unit ( 19 ), a dressing spindle ( 21 ) is arranged with the capability to be driven in rotary motion about a dressing spindle axis (S 2 ) that is orthogonal to said second linear-motion axis (Z 2 ), wherein the second linear-motion unit ( 19 ) is arranged on the first linear-motion unit ( 15 ) but not on the first swivel-motion unit ( 17 ).