why is my angular velocity slowing down?

I have a gameObject that I am giving an angular Velocity. The angularDrag is set to 0. The friction is set to 0.

Why is the gameObject slowing down. Why won’t the angular Velocity increment. It seems to remain the same speed each time.

gameObject.rigidbody.angularVelocity.y+=50;
gameObject.rigidbody.collider.material.staticFriction=0;
gameObject.rigidbody.collider.material.dynamicFriction=0;
gameObject.collider.material.frictionCombine=PhysicMaterialCombine.Minimum;

The Physics Manager sets a default limit for angular velocity (Max Angular Velocity) which by default is set to 7 (don’t know the unit - maybe radians/second). You can increase this limit per rigidbody setting rigidbody.maxAngularVelocity, but according to the docs high velocities may produce numerical instability (and 50 seems way too high when compared to the default limit, 7!).