"I am feeling great and facing no problem while bowling," said 23-year-old, who last played in IPL in 2012 after missing the tour of Australia in December 2011 due to stress reaction in the back.
Reiterating that he would not compromise with his speed, Aaron said he was bowling at his natural pace.
Asked whether Jharkhand would adopt any strategy against a strong Delhi side, Aaron said the home team would play to its strength.
"I do not think that the presence of star cricketers in Delhi team would make any difference as we too have players who represented the country or played in IPL," he said.
Aaron made his Test debut against the West Indies in November 2011 in Mumbai.