Apparatuses, systems, and methods for crimping prosthetic implants onto a delivery apparatus are disclosed. In some examples, a support body for a prosthetic heart valve can comprise a first portion comprising an alignment device configured to couple with a crimping device, and a second portion comprising a support surface that tapers from a wider end disposed adjacent the first portion to a narrower end, where the support surface is configured to receive the prosthetic heart valve thereon and hold one or more leaflets of the prosthetic heart valve in an open position. The support body can further comprise a central channel extending through the first portion and the second portion, the central channel configured to receive a delivery apparatus for the prosthetic heart valve therethrough.