I have ordered a timer and roller for my car (1921 Touring). The car didn't have a timer on it when I bought it. My car is supposed to be delivered this Saturday and I hope the timer will be here by then, so I can attempt to start the car right away. My question for the future is... How can we know which timers use the factory Ford roller? I see quite a few different brands of timers for sale.
Takes some footwork on that one.
The Ford timer case in many years has the script on the timer rod connector. Then you know it is Ford made, and uses the Ford roller timer.
Many timers can be divided into 3 types, roller rotor, brush rotor, and flap rotor.
As for roller rotors, some aftermarket timer cases MAY be able to use the Ford roller, but many have their own rollers, as each has individual contact locations, and dimensions too.
Some after market rollers were adv. to fit the Ford timer, so there may be some old time timers that would interchange.
Today, best to stick to the reproduction new parts or rotors that come with each of the new timers.
For fun reading, this link is a running list of many aftermarket Model T timers. Hundreds of styles and types of timers were offered in T days.
Thank you for the link. That was exactly what I wanted to read. Very interesting.
Tommy: And the Ford rollers had the Ford TM stamp. jb