This picture shows a new rotor on the right (06-1885, undrilled) and a new lightened rotor on the left
(06-1885/LR, drilled for the right side).
There are two drilling patterns; 06-1885/LL - Left side pattern and 06-1885/LR - Right side pattern.
The normal rotor drilling pattern is the right rotor and is used on the front of all pre-MK3 Commandos and the rear of the MK3 Commando.
The left rotor is only used on the front of the MK3 Commando. The left drilling pattern is the mirror image of the right
drilling pattern so the hole pattern spirals in the same direction as the right.
The lightened rotor is approximately 1/2 pound lighter than the undrilled rotor.
You can have your disc blanchard ground and lightened by sending it to us. This picture shows a used rotor on the right and a used ground and lightened rotor ready for new paint on the left (06-1885/CGL, drilled for the right side).
Used rotors are first bead blasted to remove the rust and loose paint, then surface ground and then drilled.
The blanchard grinding consists of first truing up the mounting surface of the rotor where it bolts to the hub, then both sides are
parallel ground to the mounting surface to a tolerance of .0005".
Our part number for this service is 06-1885/CG (blanchard ground only) and 06-1885/CGL (ground and lightened).
Please Note: You must tell us if you want it drilled for the right or left side.
The stock rotor is approximately .260" thick and we can grind rotors that are at least .245" thick.
Rotors under this .245" thickness will yield a rotor too thin to work properly.
This picture shows a new lightened rotor (06-1885/LR) mounted on the front wheel of a Commando.
The current prices are:
Please note: We will not paint your rotor unless you specifically request for it to be painted. We do not charge to paint your rotor.
We bead blast the rotors that we blanchard grind to remove any rust, grime and loose paint so your rotor should be almost ready to paint.
Before painting, you should clean the rotor with contact cleaner to remove any residue left over from the grinding, bead blasting and
drilling operations. If your rotor is not drilled for lightening, you can tape off the surface that would be under the brake pad and
paint the rotor. If your rotor has been lightened, paint the complete rotor to get paint inside the holes that we drilled to lighten
the rotor. The brake rotors are made from cast iron, which is an extremely efficient stopping material, but cast iron will start to
rust if you just show it a picture of water.
If you have painted your rotor or received a brake rotor from us that has been painted on the surface where the brake pads rub
against the rotor (the friction surface), that paint needs to be removed for maximum braking efficiency.
Andover Norton paints new rotors and we sometimes will paint rotors that have been blanchard ground and lightened,
if requested by the customer or are in inventory for a period of time. The reason for painting the friction surface of the rotor
is to keep the rotor from rusting before that rotor is put into service.
The best way to remove this paint is to mount an old set of brake pads in your caliper and VERY CAREFULLY ride your bike,
applying the brakes to burn off the paint. Once the paint has been removed, replace the old pads with new pads and you should be good to go.
This page was written and designed by F. H. Eaton
& Associates if you have any questions or comments please
contact us at info@fheaton.com