Currently, various milling strategies are widely used, most of which share a small radial depth of cut, where the cutter tooth removes thin layers of material. This leads to an increased influence of cutter tool runout on the cutting process characteristics, particularly on the torque during milling. Changes in the forces acting on the cutter can result in product defects or tool breakage. The purpose of this article is to consider the effect of cutter tooth runout on the cutting forces’ torque during milling with a small radial depth. The influence of uneven spacing between cutter teeth, the angles of inclination of helical chip flutes, the number of cutter teeth, and the radial depth on the milling torque under given radial runout of the cutter teeth is considered. It was found that radial runout of the cutter teeth causes an increase in the maximum milling torque and a redistribution of the milling torque between the teeth by up to 20%. It is shown that the number of cutter teeth and the radial depth of cut affect the magnitude of the maximum torque more as the radial runout of the cutter teeth increases. It was established that increasing the number of teeth and the radial depth of cut reduces the effect of runout on the maximum torque during milling. The use of cutters with uneven angular tooth pitch and different helical flute angles increases the influence of runout on the maximum torque during milling.