Hi
I'm Max with Park Tool and today we're going to be going through the
DT-5 Disc Brake Mount Facing Set.
First we're going to do a general explanation of the tool, then we're going to
run through the various configurations
and finally we'll show the DT-5 in action. let's get to it!
the Park Tool DT-5 Disc Brake Mount Facing Set is a precision tool system
engineered for machining frame and fork disc brake mounts. the DT-5 will precisely
face both post mount and IS mount systems
and uniquely works on hard reach chain-stay post mount systems. the DT-5 ensures the
mounting surfaces are square to the rotor face and even in height,
and allows for peak brake performance. When the brake isn't aligned with the rotor
and there's no adjustment you can make that will result in good pad alignment,
it's time to face with the DT-5.
the DT -5 has a modular design allowing for many configurations of the tool
so kick back and enjoy the music as we walk through eight different configurations.
Now that we've got the right configuration,
we'll walk through how to use the DT-5 with a post mount and IS mount.
in this setup we need to face the post mount on a front fork with a
15 millimeter thru axle.
With the stop collar low and out of the way, loosen the cutting arm pivot bolt.
Extend the linkage arm of the slider
and cutting arm assembly so they're in a relatively straight line and then
tighten the cutting arm pivot bolt.
slide body left or right on the axle so that the cutting arm wings are
over the post mounts. Rotate the body so the wings simultaneously contact post mount surfaces.
Tighten the pinch bolt to lock the body on the axle.
Loosen the cutting arm pivot bolt and lift the cutting arm and slider.
Rotate as needed to insert the cutter pilot into the hole in the lower post mount.
Lock the cutter arm by tightening the pivot bolt.
Use an appropriate cutting fluid such as Park Tool CF-2 Cutting Fluid.
Turn the knob clockwise while applying hand pressure to face the surface.
For speed you may use a ratcheting wrench with an 8mm hex bit
or a Park Tool PH-8 hex wrench to turn the handle.
Cut only the minimum necessary for a flat mounting surface.
Check your progress often. Any uncut material
our paint showing is lower than the cut made by the DT-5.
the caliper brake body needs only enough machined surface
so it will secure flat to the cut.
With the cutter contacting the face of the lower post mount,
move the stop collar until it contacts the slider and tighten the collar pinch bolt.
this sets the depth of the cut and prevents further facing.
Loosen the cutting arm pivot bolt and lift the cutting arm and slider
on the shaft. Pivot and rotate the assembly to insert the cutter pilot into the hole
on the upper post mount. Re-tighten the arm pivot bolt.
Here you will find one of two scenarios:
first the cutter may be in contact with the upper post mount surface
and there is a gap between stop collar and the slider. This indicates the second
post mount has a higher depth of cut relative to the first post mount
already faced. In these cases, turn the cutter and face this second mount
until the slider contacts the stop collar.
Both post mounts are now faced and are the same height.
In scenario B, after you face the first post mount and set your stop collar height,
the stop collar contacts the slider before the cutter contacts this second mount.
In this case loosen and lower the stop collar. Turn the cutter to face this second post.
move the stop collar up to contact the slider
and use this depth of cut setting to repeat the facing of the first post mount.
In either situation the post mounts will end up being the same height
and the mounting services will be correctly aligned and square to the rotor disc face.
Remove the tool from the bike and clean up any chips or fluid.
When facing IS mount systems, assemble the DT-5 configuration required.
with IS mounts, you don't need to worry about setting the angle of the tool.
The cutting procedure is the same as the post mount.
The DT-5 is a precision tool and should be used and stored with care.
Components should be kept clean and the cutter should be wiped with an oily cloth
or rust inhibitor after use.
Store the DT-5 in its original packaging in a dry location.
The DT-5's cutter should be periodically replaced or sharpened by a qualified technician.
Park Tool offers a sharpening service that returns cutters to factory specifications.
The DT-5 is a must-have tool for dialing in your disc brakes.
It's a great addition to any bike shop. Thanks for watching!