Main products

Brake lining for Drum type brakes

• Uses non-asbestos lining for environmental protection
• Various sizes are available, and short delivery times are possible.
• Learn the essentials of lining replacement at the brake adjustment course (free/reservation required)!

Disk pad for Disk type brakes

• Since sintered alloy is used, there is no fading phenomenon and stable braking force is exhibited even at high temperatures.
• Various sizes are available, and short delivery times are possible.
• Learn the essentials of pad replacement at a brake adjustment course (free/reservation required)

OTHER PARTS AND PARTS

• Electromagnet for Magnetic Brakes Various sizes available
• Control Box for Magnetic Brakes
• Shoe adjustment bolt/shoe adjustment friction material/shoe adjustment ukegane
• bush
• Wear rig for air damper
• pushing machine

Since the DC electromagnetic brake is of the DC instantaneous strong-excitation type, it must be strongly excited when the electromagnet is pulled, and weakly excited thereafter. Refer to Fig. 20 and Table 9 when planning an operational circuit.

Types and Ratings of Drum Type Brakes

Application of Drum Type Brakes to motors

Features

1. A brake lining with a contact angle of 60° is adopted.

・Excellent initial braking torque characteristics and easy replacement

2. Automatic vertical gap adjustment of brake lining

・Simple maintenance and inspection

3. Can be manually opened

・This no-voltage actuation bake can be manually opened using a special auxiliary nut (bolt.)

4. Large electromagnetic brakes come with an air damper (which can be optionally mounted to other electromagnetic brakes. Please refer to the note column of each specification/external dimension table for the standard equipment scope.)

・Mounting the air damper helps ensure shockless and low-noise operation.

Specifications and external dimensions of the BDS5 Type DC electromagnetic brakes

Note 1: Inform us of the brake type and DC voltage shown in Table 9 when ordering a resistor box. (The one for DC 110 V is also available.)

Note 2. AC operation of the BDS5 type DC electromagnetic brake is permissible using a control box. Use the control box BRD-SC (Fig. 5 on P. 4) for BDS5-1720 to BDS5-3040, and use control box BRD-LC (Fig. 6 on P. 4) for BDS-3348L to BDS5-4058L.

Note 3. Brakes BDS5-3348L or larger come with an air damper, which is also optionally available for brakes BDS5-3040 or smaller. (The sub-symbol L is attached to the symbol of electromagnetic brakes with an air damper.)

Description of symbols

SR ：Series resistor to be added at the time of weak excitation
DR ：Discharging resistor for brake
M1 ：Electromagnetic contactor for excitation
M2 ：Electromagnetic contactor for SR short circuit
T ：Time-limit operation timer 0.5 or 1.0 sec.
MX1 ：Auxiliary relay
MX2 ：Auxiliary relay

External dimensions of the resistor box (mm)

Specifications of brakes for DC power supply

Note 4: BB’ is the dimension of the brake equipped with an air damper (option.)

Note 5: The brake drums (Fig. 19) for BDS5-1720 to 2125 are made of gray cast iron (FC250), and those for BDS5-2533 to 5276L are made of ductile cast iron (FCD400.)

Types and Ratings of Drum Type Brakes

Application of Drum Type Brakes to motors

The AL brake is a special MEW Lifter brake used to control speed (AL control) by connecting a MEW Lifter to the secondary side of a wound-rotor induction motor. When the AL brake is to be used, place a brake for stopping on the coupling side of the motor, and the AL brake on the anti-coupling side.

Specifications and external dimensions of BFS5-T type AL brakes

Note 1:  Shared use for 200 V and 400 V is possible by changing the connection of the MEW Lifter, but shared use for 50- and 60-Hz frequencies is not allowed.

Speed control of crane motors using MEW Lifter （AL-control : Adjustable lowering control）

With a MEW Lifter (electro-hydraulic lifter), the hydraulic pressure of the cylinder room changes by altering the rotation speed of the pilot motor at the top of the lifter, while the lifting force increases or decreases in proportion to the square of the rotation speed of the pilot motor. The AL-control system controls the speed of the wound-rotor motor using this property. Figure A demonstrates the mechanism and connection. By moving the controller from the stop position to the first lowering notch, the wound-rotor motor IM and electromagnetic brake MB are connected to the power supply, the switch SW for MEW Lifter is connected to the R side respectively and the MEW Lifter of the AL brake is excited by the secondary frequency (like the power supply frequency when stopped) via a transformer TR to adjust voltage, generate lifting power and open the brake, whereupon the motor starts rotating. Since the secondary frequency declines with increasing motorrotation speed, the lifting force of the MEW Lifter suddenly falls, as shown by curve A in Fig. B, and becomes 0 at the synchronous rotation speed. Meanwhile, the spring strength for braking the AL brake is shown by linear line B. As shown, there is a state at a certain motor-rotation speed where the lifting force of the MEW Lifter is in equilibrium with the spring strength, allowing the brake shoe to rotate while slightly in contact with the brake drum. If the motor-rotation speed increases slightly further from this state, the lifting force declines below the spring strength, allowing an increase in braking force and reducing the motorrotation speed. If the motor-rotation speed declines slightly, the braking power decreases to increase the rotation speed, and the motor continues stable operation accordingly. Specifically, assuming the synthetic torque of curves A and B to be C, the sum of the generated torque D of the motor and curve C when a resistor is inserted is shown by curve E (fedba.) When the load is 0, winding operation is performed at the speed of point d. At stable speed under a rated load, the lowering characteristics are improved as shown by point b, allowing stable low-speed lowering torque characteristics to be obtained

                                                       Fig. A Mechanism and connection

                                           Fig. B Operation characteristics of AL brake

Note 2: Use the brake drum for the AL brake as specified by Satuma (Fig. 14.) The brake drums for BFS5-1620T to 2231T are made of gray cast iron (FC250), and those for BFS5-2535T to 3145T are made of spherical graphite cast iron (FCD400.)

The MEW Lifter brake uses a MEW Lifter (trade name of an electro-hydraulic lifter) instead of the electromagnet used by an electromagnetic brake. The MEW Lifter characteristics mean a slower operation with less impact than electromagnetic brakes. To further decrease the operational speed, type BMS5- WT decreases the braking torque, and uses a MEW Lifter equipped with a lowering time-adjustment mechanism, which is ideal for traversing and traveling of cranes and stopping of conveyers.

Types and Ratings of Drum Type Brakes

Application of Drum Type Brakes to motors

Feature

1. A brake lining with a contact angle of 60° is adopted.

・Excellent initial braking torque characteristics and easy replacement

2. Automatic vertical gap adjustment of brake lining

・Simple maintenance and inspection

3. Can be manually opened

・This no-voltage actuation bake can be manually opened using a special auxiliary nut (bolt.)

4. Large electromagnetic brakes come with an air damper (which can be optionally mounted to other electromagnetic brakes. Please refer to the note column of each specification/external dimension table for the standard equipment scope.)

・Mounting the air damper helps ensure shockless and low-noise operation

Specifications and external dimensions of BMS5-T Type MEW Lifter brakes

Specifications and external dimensions of BMS5-WT Type MEW Lifter brakes

Note 1: See Table 1 (P.1 and 2) for major ratings.

Note 2: Shared use for 200 V and 400 V is possible by changing the connection of the MEW Lifter, but shared use for 50- and 60-Hz frequencies is not allowed.

Note 3: MLD-15HS (used for BMS5-1316T) is exclusive for each voltage and frequency.

Note 4: The moment of inertia and each braking workload of the brake drum for BMS5-5276 (W)T are for your reference.

Note 5: Contact us when using the brake for crane hoisting. Some brakes are not appropriate for this purpose.

                     Fig. 10 BMS5-3550（W）T〜5276（W）T

Note 6 : The brake drum (Fig. 11) is made of gray cast iron (FC250.)

The AC operated DC solenoid brake is actuated by supplying AC power to the DC instantaneous strong excitation circuit using a proprietary control box. This is a separate brake, which is released when the power is on and engaged when it is turned off.

Types and Ratings of Drum Type Brakes

Application of Drum Type Brakes to motors

Features

1. A brake lining with a contact angle of 60° is adopted.

・Excellent initial braking torque characteristics and easy replacement

2. Automatic vertical gap adjustment of brake lining

・Simple maintenance and inspection

3. Can be manually opened

・This no-voltage actuation bake can be manually opened using a special auxiliary nut (bolt.)

4. Large electromagnetic brakes come with an air damper (which can be optionally mounted to other electromagnetic brakes. Please refer to the note column of each specification/external dimension table for the standard equipment scope.)

・Mounting the air damper helps ensure shockless and low-noise operation.

※Brake coil connections

◎For circuits with 200 V-class input voltage: Parallel

◎For circuits with 400 V-class input voltage: Series

Specifications and external dimensions of BRS5 Type AC-operated DC electromagnetic brakes

Note 1: See Table 1 (P. 1 and 2) for major ratings

Note 2: The control box is to be separately installed and placed in the operation panel

Note 3: The control box BRD-SC (Fig. 5) cannot be used for both 200- and 400 V-class brakes. (Control boxes of voltages and frequencies other than those listed in Table 1 are special items.)

Note 4: The control box BRD-LC (Fig. 6) is exclusive for each voltage and frequency

Note 5: Brakes BRS5-3550L or larger come with an air damper, which is also optionally available for brakes BRS5-3145 or smaller. (Sub-symbol L is attached to the symbol of electromagnetic brakes with an air damper.)

Note 6: BB’ is the dimension of the brake equipped with an air damper (option.)

Note 7: The brake drum (Fig. 4) is made of gray cast iron (FC250.)

The AC-operated DC electromagnetic pad-type disk brakes is an off brake that delivers stable braking performance with excellent features, including easy maintenance and low noise. This high-performance brake was newly developed for applications such as braking for traversing and traveling of cranes, braking of carriages and roller conveyers, etc., and for maintenance purposes. It is becoming more popular than conventional drum-type brakes.

Features

• Simple structure, compact, and lightweight Since the mechanism generating braking force integrates magnets and a braking spring on the side face of the disk rotor, this ensures a simple, compact, and lightweight structure. The brake is thus extremely easy to install, maintain and handle.

• Stable braking force Compared to drum-type brakes, the disk brake has a large heat-dissipation area, ensuring a large braking workload. This allows stable braking performance from low to high rotation speeds.

• Small shock and low braking noise Since the stroke of the movable part of the magnet is small, shock generated when braking and opening is minimized, and the braking noise is also low.

• Shortened maintenance time Adopting a dry bushing decreases lubrication work.

Rating

Note. 1: Mountable to both sides, provided that the inclination from the horizontal shaft is up to ±45°.

Note. 2: 200- and 400 V-class brakes can be used by changing the terminal connections.

Specifications

Note. 3: The operating time is the value at the rated braking torque and specified stroke

Note 4: The disk rotor is made of gray cast iron (FC250.)

Note 5: Applicable by special processing, provided that the disk-rotor thickness ranges from 10 to 15 mm (PB3-12: 10 to 20 mm.)

Note.6 :　The disk rotor is made of gray cast iron (FC250.)

Note.7:　Applicable by special processing, provided that the disk-rotor thickness ranges from 10 to 15 mm (PL3-20: 10 to 20 mm.)

External dimensions and structure

External dimensions (mm)

Note.8: For axis diameters and key dimensions (tolerance) other than those listed above, items with unprocessed axial diameter (DE) are available. Please process them to the desired dimensions yourself.

Structural drawing of disk brake

This disk brake has a simple structure, with only one pin unit as the supporting point.

• Major parts include a brake base, arm A which integrates a DC electromagnet, and arm B.

• The electromagnetic coil is fastened by MEW Resin (epoxy resin), increasing the insulation performance.

• Since a bolt for opening the manual brake is provided, the brake can be opened easily.

• There are three adjustment parts: adjustment of the gap on both sides of the lining, magnet stroke adjustment, and braking torque (brake spring) adjustment. In particular, the braking torque is easily adjustable because the braking spring is installed outside.

Description of operation

• Braking operation When the current of the DC electromagnetic coil ④ is set to OFF, arms A ⑦ and B ⑫ move toward each other by the braking spring ⑮ with the connecting pin ㉓ used as a supporting point. Consequently the lining ㉕ fastened to arms A ⑦ and B ⑫ presses down the disk rotor ⑨ , thus generating braking force.

• Releasing operation When the current of the DC electromagnetic coil ④ is set to ON, the yoke and suction disk ③ of arm A ⑦ exceed the force of the braking spring ⑮ , and are attracted to each other. At this time, the rod ⑥ presses the tip of the stroke-adjustment bolt ⑭ , arms A ⑦ and B ⑫ detach, and the disk rotor ⑨ detaches from the lining ㉕ , discharging the braking force.

General expressions used for brake calculations

When ordering and making an inquiry Please inform us of the following:

１．Application: Crane type, classification (traversing, traveling), usage rate, Rating of operations (cycle/hour), moment of inertia of the load

2．Operation environment: Indoor/outdoor use, ambient temperature

3．Brake type and Diskrotor diameter

4．Motor rating: Output/load hour rate, voltage, frequency (availability of inverter control regenerative braking)

5．Braking torque

6．Operation power supply: voltage, frequency

7．Special accessory (as applicable) : disk rotor, etc.

8．Spare parts

The BRP2 type AC-operated DC electromagnetic brake is a compact disc-type electromagnetic brake that is compatible with braking of motors with regenerative braking control such as inverters

Features

• A low-noise air damper with a small shock is standard equipment.
• An automatic adjustment system is used to adjust the upper and lower gaps of the brake lining.
  Maintenance and inspection can be simplified.
• Lubrication-free bushings are used for the main pins.
  Oil-free use is possible in general indoor environments.
• Sintered alloy is used for the brake lining material. It
  exhibits stable braking force up to high temperatures without fading.
• The brake (lining) has a symmetrical structure and
  can be mounted on either side of the disc rotor.
  (However, install the terminal box on the opposite side.)

1.Rating

*Table 1

2.Specifications

*Table 2

Note 1: Keep the normal braking rotational speed at approximately 1/10 of the maximum emergency braking rotational speed.

3. External dimensions

*Table 3 : External brake dimensions (mm)

*Dimensions marked with an asterisk (*) are those obtained when the brake lining has been worn, decreasing to the thickness limit.

*Table 4 : External disk rotor dimensions (mm)

4. Selection

5. Installation site for the brake and disk rotor

Install a disk rotor on the direct-coupling side if the motor is of the bilateral-shaft type. (The disk rotor cannot be installed on the side of a self-cooling fan, in principle.

6. Face deflection of the disk rotor

Limit the face deflection of the disk rotor to 0.07 mm or less.

General expressions used for brake calculations

When ordering and making an inquiry Please inform us of the following:

１．Application: Crane type, classification (hoisting, traversing, and traveling), usage rate, Rating of operations (cycle/ hour), moment of inertia of the load
2．Operation environment: Indoor/outdoor use, ambient temperature
3．Brake type and Disk rotor diameter
4．Motor rating: Output/load hour rate, voltage, frequency (availability of inverter control regenerative braking)
5．Braking torque
6．Operation power supply: voltage, frequency
7．Spare parts