Specifications

Publication GMC-SG001E-EN-P — June 2001
Motors 6-73
Integral Holding Brake
The following section contains a description of and specifications for a 1326AB servo motor integral
holding brake.
The disc-type brake is spring-set when power is removed. It is designed to hold a load at rest and provide
limited braking torque for emergency stopping. The brake is not intended to be used as a positioning
brake (brake backlash is 0.8 arc-minutes maximum) or meant to be continuously cycled to assist in
stopping a load.
Specifications
Note: To handle +1 Amp, an additional relay must be added.
To avoid personal injury or property damage, ensure the brake is not energized/
de-energized more than 90 times an hour when used as a parking brake. The parking
brake is only meant to hold a stationary load and not intended to stop motor
movement unless a power interruption occurs. For more information, refer to the table
below.
Brake
Option-
Holding Torque
N-m (lb-in.)
Current Draw
when Energized
(24V DC input)
Amps
Brake Response
Time
Pickup/Dropout
(ms)
Weight Added to
Motor Weight
kg (lb)
Inertia Added to Motor
Inertia
kg-cm-s
1
(lb-in.-s
2
)
Cold
Resistance
(ohms)
K4 8.1 (72) 0.88A 120/20 1.36 (3) 0.001 (0.001) 28
K5 13.6 (120) 1.2A 150/25 4.08 (9) 0.0031 (0.0027) 21
K7 45.1 (400) 1.2A 120/30 5.90 (13) 0.0053 (0.0046) 21
ATTENTION
!