Rotor Gear Clearancing
As a part of standard "rotor clearancing" it is also optional to remove extra material from the surface of the gear itself. Mazda factory rotors all have a measurable difference between total rotor height and gear height. Although the gear appears to be level with the surface of the rotor, it actually protrudes .003 - .005 in. above the rotor height. Whenever REC clearances a rotor for racing application we remove an equal amount of material from the gear as we do the rotor. In some high rpm applications where it is chosen to leave the rotor with it's factory thickness, the rotor face is left uncut, but we opt to remove material from the gear. This is referred to as gear clearancing.
This procedure provides more clearance between the rotor gear and the end housing riding surface. We have seen several cases in high rpm conditions where the rotor gear slams into the side housing and trashes the riding surface and gear in itself. Our clearancing process will help eliminate this contact in high RPM conditions.
List price: $80.00 per rotor gear
Our price: $55.00 per rotor gear