due to the pilot coming with the cutter, don't know if available as a spare part, the pilot length of it is unknown along with i didn't want to pull it apart and have to set it up again from scratch i could only get a rough measurement for the front portion. i only attempted to measure the pilot itself and not the whole 3in1 cutter. maybe forster might be of more help than what i've attached. hope it helps for whatever you're doing.