
Backlash-Free Disc Flexible Coupling (XHW · XHS · XHW-L)
Zero-backlash stainless-steel disc coupling with very high torsional stiffness for high-speed, high-precision servo and stepper positioning.
Nuts, Bolts and Knowledge
Nuts, Bolts and Knowledge supports machine builders with premium precision shaft couplings and special screws from NBK1560, made in Japan.
Zero backlashVacuum compatibleLow outgassingCleanroomHigh torqueNuts, Bolts and Knowledge
Precision shaft couplings and special screws from NBK1560, delivered with local engineering support by PM: quotations, technical support and customisation.
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For pumps, mixers and general drives: reliable torque transfer, misalignment compensation and vibration damping.
For servo and stepper axes: zero backlash, high torsional rigidity, low inertia and positioning accuracy.
Independent advice from PM engineers, with complete specifications and 2D/3D CAD on nbk1560.com.
Industries
Our couplings and special screws are matched to the demands of the sectors we serve, where reliability, cleanliness and precision allow no compromise.
Vacuum-ready, non-magnetic and cleanroom-compatible parts for wafer and metrology equipment.
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Hygienic, corrosion-resistant couplings and screws for continuous wash-down.
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Clean, precise, non-magnetic components for imaging and lab automation.
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Zero-backlash stainless-steel disc coupling with very high torsional stiffness for high-speed, high-precision servo and stepper positioning.

Compact cross-joint coupling with high torsional stiffness, minimal backlash and symmetric CW/CCW characteristics for servo and stepper drives.

Zero-backlash elastomer coupling that combines high torsional stiffness with superior vibration and shock damping, ideal for dynamic servo drives.

One-piece slit couplings for cleanroom, vacuum and heat-resistant use: zero backlash, low particle generation and excellent chemical and corrosion resistance.

One-piece spiral-beam slit couplings for precise speed and position control: zero backlash, high torsional stiffness, in aluminium or stainless steel.

Thin-walled metal bellows coupling for exceptional positioning accuracy: zero backlash and constant-velocity rotation with very low reaction forces on bearings.

Simple, cost-effective serration coupling for general-purpose motors: good vibration absorption, misalignment tolerance and electrical insulation.

Three-piece Oldham coupling that compensates large parallel misalignment with small reaction forces: stable, easy to assemble and electrically insulating.

Elastomer-jaw coupling that transmits high torque while absorbing vibration and misalignment: zero backlash with tight-fit sleeves and electrical insulation.

Heat-resistant, chemical-proof Oldham couplings with PEEK or VESPEL spacers for cleanroom and vacuum use: high misalignment tolerance and electrical insulation.
Why via PM?
PM combines the high-quality NBK Japan range with technical know-how and personal service.
Premium components, carefully selected for your application.
Practical, independent advice from experienced engineers.
Direct access to original drawings and product specifications.


NBK offers premium special screws for applications where standard fasteners fall short: compact assemblies, high loads and specialised environments such as vacuum and high temperature, as well as anti-theft, anti-loose and security screws. This range helps engineers optimise reliability, performance and space efficiency.

Vented (drilled) socket-head cap screws that release trapped air and gases during pump-down to prevent virtual leaks in vacuum and cleanroom systems.

Grade 2 and Grade 5 titanium socket-head cap and machine screws: lightweight, non-magnetic and chemically resistant for medical, aerospace and semiconductor use.

Low-permeability fasteners in titanium, SUS316L HiMo, tantalum, phosphor bronze and brass for MRI, cryogenic, semiconductor and precision magnetic instruments.

Fasteners for service far beyond 200 °C: SUS316L, molybdenum, ceramic, Vespel, Hastelloy and Inconel screws for furnaces, plasma and high-temperature process equipment.

Screws that protect the thread and head against aggressive chemicals: SUS316L HiMo, Inconel, Hastelloy C-276 and titanium for process, plating and semiconductor equipment.

High-strength fasteners in Grade 5 titanium, SUS316L, chrome-molybdenum steel, aluminium and RENY plastic that let designers downsize while keeping fastening strength.

Captive screws stay permanently attached to the component, preventing loss during operation and maintenance of covers, panels and access points.

Tamper-proof security bolts with a pin-in-Torx socket that cannot be fitted or removed with standard tools, for machines and equipment needing theft protection or safety.
As the authorised distributor and sales partner for NBK1560, we offer dedicated service and technical support for shaft couplings and special screws. We maintain a close relationship with the manufacturer to deliver the best purchasing and after-sales experience possible.
Do you have any questions about shaft couplings or special screws? Technical support comes direct from Dedemsvaart, the Netherlands.