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About Couplings

About Couplings

Coupling is a component used to connect a drive shaft and a driven part, for example, a motor shaft and a ball screw for the purpose of transmitting the torque.

What are Hex Socket Head Cap Screws (cap bolts)?

What are Hex Socket Head Cap Screws (cap bolts)?

Hex Socket Head Cap Screws (cap bolts) are bolts (screws) with hexagon-shaped holes in their heads. It lists product descriptions for hex socket head cap screws, recommended products, etc.

CE-marked components which prevent foreign matter contamination are required 【Safety / precautionary measures】

CE-marked components which prevent foreign matter contamination are required 【Safety / precautionary measures】

Introducing components with a captive mechanism.

Select the best screws for your needs

Select the best screws for your needs

This page helps to select a Product based on application needs. Vacuum, Low Outgas, Clean, Chemical Resistance, High Strength, Heat Resistance, etc

All you need to know about the roles and types of washers!

All you need to know about the roles and types of washers!

This page introduces washers. As well as a description of washers, the washer products handled by NBK are introduced.

How to Check the Screw Tightening Torque

How to Check the Screw Tightening Torque

This page explains how to check the tightening torque for coupling screws.

What are Captive Screws? Introduction of the NBK Captive Series

What are Captive Screws? Introduction of the NBK Captive Series

NBK has standardized products for fall prevention of parts in the knob, pull and e-nedzi.com (special screw) categories. Use NBK's Captive Series for food machinery, packaging machinery and chemical manufacturing equipment that require CE Marking compatibility and measures against contamination.

Property of Special Material Screws

Property of Special Material Screws

This page describes "Properties of Special Material Screws" such as ceramic, nickel, aluminum, molybdenum, Inconel, Hastelloy and phosphor bronze.

Small Diameter Screws: M0.6 (S0.6) to M2.6 Lineup

Small Diameter Screws: M0.6 (S0.6) to M2.6 Lineup

NBK offers a wide-ranging lineup of small-diameter screws in various shapes and materials.
Various head diameters and heights are available for the same screw diameters, contributing to saving space.

What are low profile screws? Find advantages, disadvantages, and usage examples explained here!

What are low profile screws? Find advantages, disadvantages, and usage examples explained here!

Here we introduce advantages, usage examples, lineups and the like regarding screws with lower head height than ordinary screws, referred to as "low profile screws" or "low profile cap screws" (low head, slim head).

What are clamp levers? Here we explain the characteristics and usage methods that help streamline screw tightening!

What are clamp levers? Here we explain the characteristics and usage methods that help streamline screw tightening!

Description of Machine elements for Designers Clamp Levers Edition page. We introduce here what clamp levers are, the advantages of their use, various usage examples, and their types and characteristics.

Jaw Type Couplings Lineup List

Jaw Type Couplings Lineup List

This is the lineup list of jaw-type couplings. Select the coupling required from the lineup list.

Miniature Screws/Precision Screws Lineup List

Miniature Screws/Precision Screws Lineup List

This is the lineup list of miniature screws and precision screws. Select the product required from the lineup list.

Collaboration Webinar: The Best Solutions for Shortening a Positioning Time by Using NBK's Couplings and SANYO DENKI's Servo Motors

Collaboration Webinar: The Best Solutions for Shortening a Positioning Time by Using NBK's Couplings and SANYO DENKI's Servo Motors

This webinar shows how one can shorten the tact time dramatically by using vibration absorption coupling and low inertia servo motor together.

Hexalobular Internal Driving Feature for Bolts and Screws

Hexalobular Internal Driving Feature for Bolts and Screws

This page describes JIS B 1015 "Hexalobular internal driving feature for bolts and screws".

The Optimized Coupling ”XG Family"（Teaser ver.）

The Optimized Coupling ”XG Family"（Teaser ver.）

The optimized "XG Family" enables solving engineering problems with high torque and high damping capability.