Need Excel Formula to find the max number of characters of 1 word in a cell

Job ID: 34775601

Budget: $14 – $30 NZD

I have a small project. I need a formula in excel to find the max number of characters of 1 word or phrase in a cell

For example this below is in 1 cell

"Centrifugal Automatic Clutch 10/11/12/13/14/18Tooth"

Therefore the max character length should return 22 because the longest word/phrase in the cell is "10/11/12/13/14/18Tooth" which has 22 characters.