Characteristics The most popular flexible shaft coupling in Japan that is compliant with JIS B 1452-1991 “Flexible Flanged Shaft Couplings”. Simple structure comprised of a flange and coupling bolts. Easy-to-mount. Bushings can be replaced just by removing coupling bolts. This makes maintenance and service easy. While it absorbs misalignment such as eccentricity and argument, it […]

Few companies can attest to a history of more than 100 years but Japanese-based Nabeya Bi-tech Kaisha, or NBK, dates back centuries. The specialty manufacturer of mechanical components, including fasteners, began in the year 1560. “Originally, NBK was a manufacturer of cast-iron products, such as pots and pans, lanterns, and such,” shares Hikoki Goto, engineering…

The most popular flexible shaft coupling in Japan that is compliant with JIS B 1452-1991 “Flexible Flanged Shaft Couplings”. Simple structure comprised of a flange and coupling bolts. Easy-to-mount. Bushings can be replaced just by removing coupling bolts. This makes maintenance and service easy. While it absorbs misalignment such as eccentricity and argument, it prevents […]

Typically, those familiar with the industry will think of SUS304 or SUSXM7 types of stainless steel when considering material for screws. However, there are many other types of stainless steel with distinct properties depending on the application. This means certain concerns — such as corrosion from harsh environments — can be reduced or eliminated by…

The vibration-absorption capable disk type XGHW-C has a dynamic vibration absorber on the high rigidity disk. It enables vibration absorption and use of higher gain levels when compared to regular disk types, thereby also allowing a shorter stabilization time. The vibration absorption function reduces the amount of parameter adjustment work, and lowers the time required […]

Eccentric lock washers are washers that can be combined with commercially available hex nuts to prevent screw loosening. These washers, which are available from NBK, require no special tools for fastening. This means they are as easy to use as spring washers or flat washers. In terms of design, these components consist of a bearing…

NBK, a specialist manufacturer of mechanical components, offers Impact Screwdrivers and Stripped Screw Removal Bits. These tools are ideal for removing stripped screws or those with damaged recesses, which are unable to loosen with conventional tools. Damage may occur for several reasons, such as when recesses are crushed because of rust or corrosion from long-term…

NBK has launched a new video with tips on correctly using its clamping screws. The video describes usage methods for screws with ball-shaped tips for securely fixing workpieces. NBK is a developer and manufacturer of miniature couplings, special screws, and machine elements for advanced industries, including manufacturing equipment for semiconductors, robotics, machine tools, and medical…

NBK provides couplings that can be used in special environments such as clean room, vacuum, high temperature (80 ° C or higher) are available. ● Low particle The amount of attached particle is ultra low. This is directly available in a cleanroom. This does not bring contaminated matters into a cleanroom. ● Vacuum-supported A material […]

High-gain flexible coupling which surpasses XGT-CXGL-CXGS-C in performance. This is a single-piece construction with the two aluminum hubs molded with high-gain rubber. The optimal damping and rigidity design enables realization of even greater servomotor gain, leading to reduced stabilization time. Technical information⇒Productivity and stabilization time Suppressing speed unevenness control during stepping motor operation is effective.⇒Suppressing […]

 This video showcases NBK’s new XGHW-C flexible coupling. These flexible couplings feature vibration absorption function added to high rigidity couplings. Additionally, this coupling has a structure with both high rigidity and vibration absorption. The individual dynamic vibration absorbtion is separate from the inertial rotor and elastic body in order to achieve vibration absorption. NBK […]

In this video, NBK explains how to assemble the coupling and single-axis actuator. To complete the assembly, NBK lists the following items necessary: Gloves Parts cleaner Waste cloth Single-axis actuator Wrench Torque screwdriver or torque wrench Oil pen Scale Motor Coupling NBK www.nbk1560.com

In this video, we see a single-piece construction coupling with the two aluminum hubs molded and vibration-absorbing rubber. The “XG2” designing with damping and high rigidity helps the coupling meet servomotors’ demanding high gain and its precision positioning requirement. NBK www.nbk1560.com

This is a multi-functional part made of various materials with slits and the portion between the slits works as a spring. It is a simple structure made of various materials with slits and its functionality is demonstrated in a flexible coupling（ MST and MSX ). This protects arbitrary spring properties against compression, tension, shearing, and […]

Here we address considerations when specifying a servomotor coupling to satisfy servo requirements — ever-evolving specifications that become more demanding all the time. Tetsuya Niwa • Director of product planning and development Kei Yamada • Product Manager — Product planning and development Hiroki Goto • engineering specialist Paulo Castelo • Technical solutions supervisor Edited by […]

Coupling Tips

The MJC-BL is a jaw type flexible coupling. A tight tit enables transmission with zero backlash at low torque. The easy fit allows users to assemble and partition the hub and sleeve smoothly. The coupling’s flexibility allows eccentricity, angular misalignment and twisting vibration to be accepted. It has electrical insulation and a resistance value: Not […]

Coupling Tips

Clamping screws are machine elements which use screw thrust for workpiece fixing and positioning. Point contact by the full ball securely fixes the workpiece. Advantages of using Clamping Screws By replacing hex socket head cap screws and hex socket set screws with clamping bolts when clamping (fixing) workpieces, point contact with workpieces can be achieved. […]

Coupling Tips

        Characteristics Applicable motors MBB Servomotor ◎ Stepping Motor ◎ General-purpose Motor – ◎: Excellent ○: Very good Property MBB Zero Backlash ◎ Allowable Misalignment ○ ◎: Excellent ○: Very good This is a bellows type flexible coupling. The bellows allows eccentricity, angular misalignment, and end-play. The bellows is stainless steel. Application […]

Coupling Tips

For “Power Transmission” usage, NBK’s “MJ” jaw coupling are suitable. They can transmit high torque, accepting reasonable levels of misalignment. As it also has vibration absorption capability, jaw type is widely used in many applications. If you need to allow more misalignment, we recommend “MOR” Oldham-type coupling. NBK www.nbk1560.com

Coupling Tips

How to select couplings A simple and generally used method to select the most suitable coupling is the four step approach. That is, 1. Select the coupling type suitable to the intended usage 2. Select the material of the coupling in line with the environment of usage 3. Select the coupling size fitted to the […]

Coupling Tips

There are many ways to improve the productivity in the Servo System. For example, there is the possibility that you can shorten the production cycle time if you use a high performance servo motor and an actuator. There are also many different kinds of couplings. In this video, NBK explains the basic points on how […]

Coupling Tips

The story behind the XG Series In accordance with the evolution of servomotors, coupling needs have changed as well. Servomotor speed response frequency has improved drastically over the past few years, creating an environment prone to vibration: it is difficult to achieve maximizing servomotor performance with existing high-rigidity couplings (disk-type). The “High gain Rubber Coupling […]