Safety Instructions
©
2021 KEB America, Inc.
17
2.8 Permissible Friction Work
When operating the brake adhere to the friction work values specified below, taking the
speed and frequency of operation into account. Exceeding these specifications may
result in thermal overload of the lining and a strong decrease in braking torque.
NOTICE
The WRmax table below is only valid for standard brakes with a
secondary friction surface of cast steel.
Rust-free secondary friction surfaces or speeds higher than
specified will reduce the permissible friction work. If rated torque
is reduced by optional adjustment screws, the permissible work
will increase.
Permissible Friction Work Values
Size Range
Speed
00 – 07
3000 rpm
08 – 11
1500 rpm
Figure 1 Friction Switching Frequency
Red line for brake without friction disk
