(Adds fourth-quarter details, I/B/E/S estimates)
Nov 8 (Reuters) - Factory automation systems maker Rockwell Automation Inc, which last month rejected bigger rival Emerson Electric Co's $27.6 billion takeover bid, posted a lower-than-expected quarterly profit, partly hurt by higher investment spending.
Rockwell on Wednesday also forecast its fiscal 2018 adjusted profit to be $7.35 per share at the mid-point, below Wall Street estimates of $7.38 per share, according to Thomson Reuters I/B/E/S.
The company's net income rose 10.5 percent to $204.6 million, or $1.57 per share, in the fourth quarter ended Sept. 30.
On an adjusted basis, the Milwaukee, Wisconsin-based company earned $1.69 per share. Analysts on average had expected a profit of $1.73 per share.
Revenue rose 8 percent to $1.67 billion. (Reporting by Sanjana Shivdas in Bengaluru; Editing by Maju Samuel)