In a numerus study, it has been seen that more than 55% of parts might be declined during final assembly of polymer composite application because of delamination induced damages. Laminate quality, thrust force and drilling conditions are key factors associated with delamination. It has been seen that thrust force assumes an essential factor in the acceptance of the component and no delamination takes place below critical thrust force (CTF). Therefore, to obtain delamination free drilling, CTF can be exploited as a lucrative tool. In this paper, numerical prediction of different CTF models for drilling have been reviewed in depth for circular and elliptical delamination damage. Along with that loading conditions of drilling tool like concentrated loading (PL), distributed loading (UDL) and uniformly varying loading (UVL) have been considered in this state-of-art review paper. This paper highlights the importance of delamination shape and loading pattern for prediction of the CTF during drilling operation. This common review on numerical prediction of CTF is not only up to the date comprehensive summary from available literature but it also directs new aspiring researchers to iterate a new feasible mathematical forecast close to the actual CTF for delamination free composite materials.