  We construct a rotationally invariant Ricci flow through surgery starting at
any closed rotationally invariant Riemannian manifold. We demonstrate that a
sequence of such Ricci flows with surgery converges to a Ricci flow spacetime
in the sense of [32]. Results of Bamler-Kleiner [8] and Haslhofer [29] then
guarantee the uniqueness and stability of these spacetimes given initial data.
We simplify aspects of this proof in our setting, and show that for
rotationally invariant Ricci flows, the closeness of spacetimes can be measured
by equivariant comparison maps. Finally we show that the blowup rate of the
curvature near a singular time for these Ricci flows is bounded by the inverse
of remaining time squared.
