This motor has a 9.25" diameter. It is a series wound DC motor with a double ended shaft. The TransWarP 9 ™ motor has been designed to ease the conversion process for people who want dual motor and/or direct drive applications. It has many unique features that set it apart from any other EV motor currently manufactured.
This motor has a "shorty" tail shaft housing from a Chevrolet Turbo 400 transmission fitted to the drive end-bell (may be ordered with or without housing!) This is because the drive end shaft is not the typical 1.125" single-keyed type, but rather a hefty 1.370", 32-tooth involute spline that is identical to the tail shaft spline of a Turbo 400 transmission. In other words, this motor was designed to replace a transmission and couple directly to a drive shaft! We have added double wide bearings on the drive end, added grease fittings (as you now have a slip-yoke assembly...).
We use the industry standard 1350 universal, so you can easily adapt it to any manufacturers drive shaft! The motor also has brush wear indicators and a temperature snap switch. It has the same high efficiency fan and massive commutator and brushes as the WarP 9 motor. We even made the commutator end shaft the same diameter as the drive end of a typical WarP 9 - just in case you wanted to connect 2, 9" motors together!