Page 204 - The Tribology Handbook

B8 Brakes

BRAKE SELECTION

Table 8.6 Brake selection for special performance requirements
;:a
Standard
Maximum operating Brake
Qpe of brake Stabiliu parts Setting up
temperatures factor
available
Positive servo Low Very high Very low Some Straightforward but
band brakes watch excessive
expansion in
narrow tracks

~~~ ~
Drum brakes with Low for external High Low Some Watch drum ovality
two leading shoes shoes, higher and run-out and
for internal drum stiffness
shoes

Drum brakes with Low for external Moderate Moderate Some Watch drum ovality
one leading and shoes, higher and run-out and
one trailing shoe for internal drum stiffness
shoes

Duo-servo brakes Low Very high Low Some Watch drum ovality
and run-out

Disc brakes High Low High Some Watch disc run-out
thick/thin
variation round
disc, disc stiffness,
disc coning.

68.5