Ogura's New Medical & Robotics Brakes
07-25-2023
Ogura's new MCNB-Z series Spring Applied Brakes are changing the way robotics and medical equipment designers look at power-off holding brakes. These are used for both safety and precision motion control. For decades, permanent magnet type brakes were the only reliable solution. This is no longer the case, thanks to this new breakthrough design.
The product is spring applied type and truly zero backlash, which is unique. This means that loads can be held precisely when power is removed, improving the quality of the machinery and process. Traditional designs held zero backlash in the axial direction by fixing the hub to the friction disc, but this design also incorporates zero backlash in the rotational direction by removing play between the armature to the collar. This is important to note.
| Motor Frame |
Size 40 |
Size 60 |
Size 80 |
| Model |
MCNB-3Z |
MCNB-15Z |
MCNB-40Z |
| Brake OD |
35 mm |
52 mm |
68 mm |
| Voltage |
24 VDC |
24 VDC |
24 VDC |
| Static Torque (min) |
0.38 Nm |
1.52 Nm |
3.80 Nm |
| Allowable E-stops |
100 |
100 |
100 |
| Noise Level (max) |
60 dB |
60 dB |
60 dB |
The applications involved are often noise sensitive, so the innovative design enables quiet actuation at 60dB or less.
The special construction of the internal brake results in the lowest possible inertia of the hub and friction disc, which is very desirable in high cycling and high-speed applications. This is possible because the friction material is not bonded to the rotating disc, the material is bonded to the stationary components.
The product is compact with a super-thin profile and light weight. This provides benefits to robotic arm and motion control designers desiring smaller footprints, quicker system response times, lower system weight and cost.
Spring applied brake technology allows for lower power consumption as over excitation releases the brake quickly, and pulse width modulation after the brake is released allows for 50% or more power savings. Reduced power then results in lower heat, extended overall component and system life. This allows improved warranties, reduced maintenance, and superior performance. They also offer distinct advantages in wide temperature range applications.
Lastly, they are easier to install since they are one piece construction as opposed to two-piece permanent magnet type construction.
3 Standard sizes are available from 0.38 to 3.8 Nm static torque. All have length of 27.7mm or less, 32mm or less if you add the hub. Custom sizes can be considered.
Ogura has been producing clutches and brakes since 1938. Over that time, we have developed over 5,000 different models of clutches and brakes. Although Ogura primarily produces electromagnetic clutches and brakes, we also produce magnetic particle, mechanical, pneumatic, hydraulic and a variety of specialty products. Ogura is the world's largest manufacturer of electromagnetic clutches and brakes. Current manufacturing capacity is over 30 million units per year. To provide localized support, we have manufacturing plants spread throughout the world in Asia, The Americas, and Europe. All manufacturing facilities are ISO recognized and conform to the ISO 9001:2015, ISO 14001:2015, and IATF 16949:2016.??
If you would like us to build a special product for you or to modify one of our existing standard models, please contact us at 732-271-7361, and we will assist you in finding a product that will meet your needs. Or if you prefer, please visit our website at www.ogura-clutch.com for immediate information. Ogura Industrial Corp. Somerset, NJ.
