Cartlon got out to a 17-0 lead after five ends, before Aramoho narrowed the gap to 23-11 and then dominated the latter ends, although they could only get one point on the last end when trailing 25-23.
In the other semifinal, Bell's team defeated the Wanganui BC four of skip Cary Pinker, Warwick Pinker, Doug Baty and Lindsay Bourne by 25-19.
Wanganui went out to a 13-3 advantage, but Taradale came back to lead 17-13 after the 13th end and could not be headed after that.
Earlier on Friday, four Whanganui teams made it through to post section play.
The Kevin Coombe-skipped Aramoho team were narrowly beaten by a West End team 25-22 in the morning, while the Pinker team had a bye to the second round.
Bellis's four beat the Paritutu four on their home green 24-13 and the Wanganui BC team of skip Ray Park, Ron Hutchison, Bernard Anderson and Ian Porteous won their first round matchup with an Alton four 29-9.
Moving onto the afternoon and Park was eliminated by the Hillcrest team 22-21 at West End, while Pinker's team beat the Paraparaumu Beach four 26-17 and over at Paritutu the Belliss four won 27-26 over Ian Monaghan's Palmerston North team.
On Saturday morning in the Last 16, Pinker's team beat the Gary Lilley-skipped West End locals 25-17, while Belliss took on the four from Australia, skipped by Gary McKay, winning 25-9.
Both Whanganui fours kept their momentum going in the quarterfinals that afternoon when Pinker ended Taranaki's hopes of a local winner by beating Garry Murfitt's sole remaining West End team 21-18, while Belliss's four thrashed the Ray Hudson-skipped Central Levin 28-9.
The TSB Bank Taranaki women's open fours starts today.