parktool DT-5.2 User manual

5115 Hadley Ave. N., St. Paul, MN 55128 (USA) www.parktool.com
PARK TOOL CO.
DT-5.2 Disc Brake Mount Facing Set
The Park Tool DT-5.2 Disc Brake Mount Facing Set is a precision tool system
engineered and built to machine frame and fork disc brake mounts so they
are precisely aligned to the brake rotor.
• Faces any IS Mount, Post Mount or Flat Mount, including low clearance,
chainstay mounts
• Telescoping axle adapters allow use with any configuration of open or
thru axle dropouts and dropout widths
• Use of the DT-5.2 helps ensure proper disc brake setup and performance
INSTRUCTIONS:
Read instructions completely before using the DT-5.2 Disc Brake
Mount Facing Set. Contact the frame/ fork manufacturer for specific
recommendations, cautions, or warranty issues before facing disc brake
mounts. Video instructions for using the DT-5.2 can be found at www.
parktool.com.
Always wear safety glasses when using the DT-5.2.
NOTES:
The DT-5.2 is 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-5.2 in its original packaging or in
another safe location.
The DT-5.2 ’s cutter should be periodically replaced or sharpened by a
qualified technician. Park Tool offers a sharpening service that returns
cutters to factory specifications. For more information: www.parktool.com.
Facing Disc Brake IS Mounts
A. Determine axle type, axle size and dropout width of frame/fork. Assemble
DT-5.2 as shown. Using pinch bolt in axle collar (#29), adjust axle width to
match the width of the frame or fork.
B. Install axle of assembled DT-5.2 securely into frame or fork dropouts.
C. Loosen pivot bolt (#6) then slide, pivot and rotate arm (#10) as needed to
insert pilot of cutter into hole on lower mount. Tighten pivot bolt to lock
position.
D. Install knob (#9) on arm (#10). Turn knob clockwise while applying hand
pressure to face lower mount. Use appropriate cutting fluid (such as Park
Tool CF-2 Cutting Fluid) and cut only the minimum necessary for a flat
mounting surface. NOTE: For speed, a ratcheting wrench with an 8mm
hex bit or a Park Tool PH-8 Hex Wrench can be used to turn the knob.
E. With teeth of cutter contacting face of lower mount, move stop collar
(#3) until it contacts slider (#11). Tighten pinch bolt in stop collar to lock
position. This sets the height of the cutter and prevents further cutting.
F. Move arm (#10) and slider (#11) on axle to pull cutter from lower mount.
G. Slightly loosen pivot bolt (#6). Slide, pivot and rotate arm (#10) as needed
to insert pilot of cutter into hole on upper mount. Tighten pivot bolt to lock
position.
H. Note position of teeth on cutter.If teeth of cutter contact the upper
mount and there is a gap between the stop collar (#3) and the slider (#11),
complete step I and stop.If stop collar (#3) contacts slider (#11) before
teeth of cutter contact the upper mount, skip step I and go straight to
steps J through N.
I. Turn knob (#9) clockwise while applying hand pressure to face surface of
upper mount. Continue facing mount until stop collar (#3) contacts slider
(#11). The facing process is complete. Remove DT-5.2 from frame/fork.
J. Loosen pinch bolt in stop collar (#3).
K. Turn knob (#9) clockwise while applying hand pressure to face surface of
upper mount.
L. With teeth of cutter contacting face of upper mount, move stop collar (#3)
until it contacts slider (#11). Tighten pinch bolt in stop collar to
lock position.
M. Slightly loosen pivot bolt (#6). Slide, pivot and rotate arm (#10) as needed
to insert pilot of cutter into hole on lower mount. Tighten pivot bolt
to lock position.
N. Turn knob (#9) clockwise while applying hand pressure to face surface
of lower mount. Continue facing mount until collar contacts slider. The
facing process is complete. Remove DT-5.2 from frame/fork.
Facing Disc Brake Post Mounts and Post Mount Adaptors
(mounted to IS mounts)
A. Determine axle type, axle size and dropout width of frame/fork. Assemble
DT-5.2 as shown. Using pinch bolt in axle collar (#29), adjust axle width to
match the width of the frame or fork.
B. Install axle of assembled DT-5.2 securely into frame or fork dropouts.
C. Loosen pivot bolt (#6), pinch bolt in body (#1) and pinch bolt in stop collar
(#3) just enough to allow parts to slide, pivot and rotate.
D. Adjust arm (#8) so the two “wings” simultaneously contact the two
mounts. Tighten pivot bolt (#6) to lock position. Then tighten pinch bolt in
body (#1) to lock position.
E. Install knob (#9) on arm (#8).
F. Loosen pivot bolt (#6) and lift arm (#8) and slider (#11) on shaft (#2). Then
pivot and rotate as needed to insert 5mm pilot (#28) into hole on lower
mount. Tighten pivot bolt (#6) to lock position. Note: Two pilot bolts are
included with the DT-5.2—one with a 5mm pilot (#28) and one with a
4mm pilot (#26). When facing post mounts, the pilot bolt with the 5mm
pilot (#28) should be installed.
G. Turn knob clockwise while applying hand pressure to face mount. Use
appropriate cutting fluid (such as Park Tool CF-2 Cutting Fluid) and cut
only the minimum necessary for a flat mounting surface. NOTE: For
speed, a ratcheting wrench with an 8mm hex bit or a Park Tool PH-8 Hex
Wrench can be used to turn the knob.
H. With teeth of cutter contacting face of lower mount, move stop collar
(#3) until it contacts slider (#11). Tighten pinch bolt in stop collar to lock
position. This sets the height of the cutter and prevents further cutting.
I. Slightly loosen pivot bolt (#6). Lift arm (#8) and slider (#11) on shaft (#2)
then pivot and rotate as needed to insert pilot of cutter into hole on upper
mount. Tighten pivot bolt to lock position.
J. Note position of teeth on cutter.If teeth of cutter contact the upper
mount and there is a gap between the stop collar (#3) and the slider (#11),
complete step K and stop.If the stop collar (#3) contacts the slider (#11)
before teeth of the cutter contact the upper mount, skip step K and go
straight to steps L through P.
K. Turn knob (#9) clockwise while applying hand pressure to face surface of
upper mount. Continue facing mount until stop collar (#3) contacts slider
(#11). The facing process is complete. Remove DT-5.2 from frame/fork.
L. Loosen pinch bolt in stop collar (#3)
M. Turn knob (#9) clockwise while applying hand pressure to face surface of
upper mount.
N. With teeth of cutter contacting face of upper mount, move stop collar
(#3) until it contacts slider (#11). Tighten pinch bolt in stop collar to lock
position.
O. Slightly loosen pivot bolt (#6). Lift arm (#8) and slider (#11) on shaft (#2)
then pivot and rotate as needed to insert pilot of cutter into hole on lower
mount. Tighten pivot bolt to lock position.
P. Turn knob (#9) clockwise while applying hand pressure to face surface of
lower mount. Continue facing mount until stop collar (#3) contacts slider
(#11). The facing process is complete. Remove DT-5.2 from frame/fork.
DT-5.2 Instructions

5115 Hadley Ave. N., St. Paul, MN 55128 (USA) www.parktool.com
PARK TOOL CO.
Facing Disc Brake Flat Mounts
A. Determine axle type, axle size and dropout width of frame/fork. Assemble
DT-5.2 as shown. Using pinch bolt in axle collar (#29), adjust axle width to
match the width of the frame or fork.
B. Install axle of assembled DT-5.2 securely into frame or fork dropouts.
C. Loosen pivot bolt (#6), pinch bolt in body (#1) and pinch bolt in stop collar
(#3) just enough to allow parts to slide, pivot and rotate.
D. If facing flat mounts on frame: Place two unthreaded alignment studs
(#24) into the holes in the mounts. Adjust arm (#8) so the two “wings”
simultaneously contact the two alignment studs. Tighten pivot bolt (#6) to
lock position. Then tighten pinch bolt in body (#1) to lock position.
If facing flat mounts on fork: Install two threaded alignment studs (#27)
into the threaded holes in the mounts. Adjust arm (#8) so the two “wings”
simultaneously contact the two alignment studs. Tighten pivot bolt (#6) to
lock position. Then tighten pinch bolt in body (#1) to
lock position.
E. If facing flat mounts on frame: Install knob (#9) on arm (#8). Two pilot
bolts are included with DT-5.2. When facing flat mounts on the frame, the
pilot bolt with the 5mm pilot (#28) should be installed on the arm. If facing
flat mounts on fork: Install knob (#9) and on arm (#8). Two pilot bolts are
included with DT-5.2. When facing flat mounts on the fork, the pilot bolt
with the 4mm pilot (#26) should be installed on the arm.
F. Loosen pivot bolt (#6) and lift arm (#8) and slider (#11) on shaft (#2).
Remove the two alignment studs (#24 or #27) then pivot and rotate arm
and slider as needed to insert pilot of cutter into hole on lower mount.
Tighten pivot bolt (#6) to lock position.
G. Turn knob (# 9) clockwise while applying hand pressure to face mount.
Use appropriate cutting fluid (such as Park Tool CF-2 Cutting Fluid) and
cut only the minimum necessary for a flat mounting surface. NOTE: For
speed, a ratcheting wrench with an 8mm hex bit or a Park Tool PH-8 Hex
Wrench can be used to turn the knob.
H. With teeth of cutter contacting face of lower mount, move stop collar
(#3) until it contacts slider (#11). Tighten pinch bolt in stop collar to lock
position. This sets the height of the cutter and prevents further cutting.
I. Slightly loosen pivot bolt (#6). Lift arm (#8) and slider (#11) on shaft (#2)
then pivot and rotate as needed to insert pilot of cutter into hole on upper
mount. Tighten pivot bolt to lock position.
J. Note position of teeth on cutter.If teeth of cutter contact the upper
mount and there is a gap between the stop collar (#3) and the slider (#11),
complete step K and stop.If the stop collar (#3) contacts the slider (#11)
before teeth of the cutter contact the upper mount, skip step K and go
straight to steps L through P.
K. Turn knob (#9) clockwise while applying hand pressure to face surface of
upper mount. Continue facing mount until stop collar (#3) contacts slider
(#11). The facing process is complete. Remove DT-5 from frame/fork.
L. Loosen pinch bolt in stop collar (#3).
M. Turn knob (#9) clockwise while applying hand pressure to face surface of
upper mount.
N. With teeth of cutter contacting face of upper mount, move stop collar
(#3) until it contacts slider (#11). Tighten pinch bolt in stop collar to lock
position.
O. Slightly loosen pivot bolt (#6). Lift arm (#8) and slider (#11) on shaft (#2)
then pivot and rotate as needed to insert pilot of cutter into hole on lower
mount. Tighten pivot bolt to lock position.
P. Turn knob (#9) clockwise while applying hand pressure to face surface of
lower mount. Continue facing mount until stop collar (#3) contacts slider
(#11). The facing process is complete. Remove DT-5.2 from frame/fork.
DT-5.2 Instructions

Assembly For Facing Disc Brake IS Mounts
1- 9mm open
2- 10mm open
3- 15mm Front
5- 12mm Rear
6- 12mm Front
Use axle from fork
9mm Axle
Open Dropout
100-150mm Width
10mm Axle
Open Dropout
135-210mm Width
15mm Thru Axle
100-165mm Width
20mm Thru Axle
Any Width
12mm Thru Axle Rear
135-215mm Width
12mm Thru Axle Front
100-165mm Width
10
9
6
22
29
11
3
21
19 19
17 3
11 29
3
12
11 29
13
18
20 20
7
333 14
15
12
11
11
11
23 29
29
13

Assembly for Facing Disc Brake Post Mounts and Post
Mount Adapters (mounted to IS mounts)
9mm Axle Open Dropout-Post Mount
10mm Axle Open Dropout
15mm Axle Thru Axle
12mm Axle Thru Axle Front
12mm Axle Thru Axle Rear
Use axle
from fork
9mm Axle
Open Dropout
100-150mm Width
10mm Axle
Open Dropout
135-210mm Width
15mm Thru Axle
100-165mm Width
20mm Thru Axle
Any Width
12mm Thru Axle Rear
135-215mm Width
12mm Thru Axle Front
100-165mm Width
1
23
12
29
13
14 11
29
15
3
22
29 29
18
12 1
29
13
21 11
19
19
17
20
20
11
2
7
6
9
28
8

Assembly for Facing Disc Brake Flat Mounts
9mm Axle Open Dropout-Flat Mount
10mm Axle Open Dropout-Flat Mount
15mm Axle Thru Axle-Flat Mount
20mm Thru Axle Any Width - Flat Mount
12mm Axle Thru Axle Front - Flat Mount
12mm Axle Thru Axle Rear - Flat Mount
Use axle
from fork
or
or
9mm Axle
Open Dropout
100-150mm Width
10mm Axle
Open Dropout
135-210mm Width
20mm Thru Axle
Any Width
12mm Thru Axle Rear
135-215mm Width
12mm Thru Axle Front
100-165mm Width
15mm Thru Axle
100-165mm Width
1
23
12
29
13
14 1
1
29
18
12 1
29
13
22
29
1
21
19
20
24
26 28
9672
11
3
27
17
19
20
1
29
15
8

5115 Hadley Ave. N., St. Paul, MN 55128 (USA) www.parktool.com
PARK TOOL CO.
DT-5.2 Parts
© 2018 ParkTool Co.
PARKTOOL® and the color BLUE are registered trademarks of ParkTool Co.
08/18
1
2
6
11
12
29
13
14
17
21
22
23
24
25
27
26
28
30
31
18
19
20
16
15
9
3
8
4
5
7
10
Ref. # Part # Description Qty.
12160 Body 1
22161 Shaft 1
32162 Stop Collar 1
42163-4 Pinch Bolt (M6x18mm) 8
52164 Snap Ring 1
61888 Pivot Bolt (M8x 30mm) 1
71877-2 Washer 1
82165A Arm Assembly—Post Mount/Flat Mount 1
92174A Knob 1
10 2180A Arm Assembly— IS Mount 1
11 2182A Slider 1
12 2190 15mm Female Axle 1
13 2191 15mm Male Axle 1
14 2184 12mm Female Axle 1
15 2185 12mm Male Axle 1
16 1775-2 Retaining Ring 3
17 2186 10mm Female Axle 1
18 2187 10mm Male Axle 1
19 1773-4 Axle Washer 4
20 1771 Axle Bolt (M6 x 30) 4
Ref. # Part # Description Qty.
21 2188 9mm Female Axle 1
22 2189 9mm Male Axle 1
23 2194 12mm Front Adaptor 1
24 2192-2 Unthreaded Alignment Stud 2
25 2193-2 1.5mm O-Ring 2
26 2195 Pilot Bolt with 4mm Pilot 2
27 2196-2 Threaded Alignment Stud 2
28 2169 Pilot Bolt with 5mm Pilot 1
29 2162 Axle Collar 4
30 2179 IS Mount Cutter 1
31 2171 Post Mount Cutter 1
DT-5.2 PART NUMBERS