A brake motor is provided with a braking mechanism comprising: a motor cover that is provided with an outer wall which is provided such that the inner diameter of an inner peripheral portion thereof increases with proximity to one side in the axial direction from the other side; a drum member that is provided with an outer peripheral portion which is located radially inward of the inner peripheral portion of the outer wall and which faces the inner peripheral portion; and a brake shoe that is mounted on the outer peripheral portion. The inner peripheral portion is provided with a blast-treated portion which is blast-treated upon impact by media which contains large amounts of sharp edges among media which contains large amounts of sharp edges and media which contains large amounts of non-sharp edges.

A brake motor is provided with a braking mechanism comprising: a motor cover that is provided with an outer wall which is provided such that the inner diameter of an inner peripheral portion thereof increases with proximity to one side in the axial direction from the other side; a drum member that is provided with an outer peripheral portion which is located radially inward of the inner peripheral portion of the outer wall and which faces the inner peripheral portion; and a brake shoe that is mounted on the outer peripheral portion. The inner peripheral portion is provided with a blast-treated portion which is blast-treated upon impact by media which contains large amounts of sharp edges among media which contains large amounts of sharp edges and media which contains large amounts of non-sharp edges.

A system for controlling descent of a lift includes a linear actuator driven by an electric motor to raise and lower the lift. The motor has a shaft that rotates about an axis. A holding brake applies a braking torque to the shaft when the motor is not driving the shaft. A variable torque control device includes a rotatable member rotatable about the axis and a stationary member radially outward of the rotatable member. A clutch includes a first member that rotates with, but moves axially relative to, the motor shaft and a second member axially spaced from the first member when the clutch is disengaged and coupled to the first member when the clutch is engaged. The second member supports the rotatable member of the torque control device. The system further includes means for engaging the clutch and releasing the holding brake.

A system for controlling descent of a lift includes a linear actuator driven by an electric motor to raise and lower the lift. The motor has a shaft that rotates about an axis. A holding brake applies a braking torque to the shaft when the motor is not driving the shaft. A variable torque control device includes a rotatable member rotatable about the axis and a stationary member radially outward of the rotatable member. A clutch includes a first member that rotates with, but moves axially relative to, the motor shaft and a second member axially spaced from the first member when the clutch is disengaged and coupled to the first member when the clutch is engaged. The second member supports the rotatable member of the torque control device. The system further includes means for engaging the clutch and releasing the holding brake.