5020-M Owner's Manual
Kobelt Manufacturing Co. Ltd.
rev B
mnl5020-M.docx
10 of 27
3
I
NSTALLATION
3.1
P
REPARATION
The foundation plate to support the brake caliper must be designed to withstand the
maximum braking forces generated by the brake caliper. The foundation must also be flat to
ISO tolerance grade IT8 and square to the brake disc. See Appendix A for key installation
dimensions. The brake pedestal must be designed to allow the mounting bolts to be inserted
from underneath.
The rotating element should have bearings sufficient to carry the weight of the disc and also
resist the additional stress when the disc brake is applied.
The spigot that centers the brake disc must not be designed in such a way that it impedes the
thermal expansion of the disc.
Brake discs are shipped with a light rust inhibitor applied to the surfaces. Remove the rust
inhibitor using solvent and a cloth prior to installation.
Any guarding around the brakes must provide enough room to allow full extension of the
bake actuators plus full pad wear adjustment.
3.2
B
RAKE
D
ISCS
The brake disc must be installed onto the rotating element before installing the caliper. Brake
discs must meet the following requirements:
Table 1: Brake Disc Requirements
PARAMETER
VALUE
AXIAL RUN OUT
IT9 (TIR)
①
RADIAL RUN OUT
IT11 (TIR)
FLATNESS
.003 in [0.08 mm]
②
PILOT FIT
H9/f8
SURFACE FINISH
63 micro inches [1.6 micrometers] RMS
SURFACE HARDNESS
HB135 minimum
To achieve the run-out tolerance the mounting face on the rotating element must be
machined flat. Excessive run-out of the disc could cause premature wear of the linings, caliper
pins, lever journals as well as the actuators.
①
International tolerance class. Allowable run out is proportional disc O.D.
②
Per 2.5 in [64 mm] square area
