Our high precision keyless shaft locking devices are engineered for reliable power transmission in demanding industrial applications. The locking assembly series includes multiple models (Z2, Z3, Z3B, Z4, Z5, Z9, Z12A, Z12B, Z15, Z17B, Z18, Z22) to meet various torque requirements from 145-930 Nm.

Manufactured from premium C45 steel or 304 stainless steel, these locking devices feature black-phosphate surface treatment for enhanced durability. The precisely machined components ensure tight tolerances (H6 precision) for vibration-free operation even at high speeds up to 4000 RPM.

The innovative keyless design provides several advantages over traditional keyed connections: eliminates keyway stress concentrations, enables precise shaft-hub positioning, and allows for easy installation/removal without special tools. The double structure design enhances torque transmission capacity while maintaining compact dimensions.
Available in bore sizes ranging from 24-165mm and thickness from 32-140mm, these locking assemblies are widely used in: wind power generation systems, heavy mining equipment, precision CNC machine tools, automotive manufacturing lines, and industrial pump/fan applications.

All products undergo strict quality control and are backed by 1-year warranty. We offer both standard configurations and customized solutions with OEM/ODM support. The locking devices are compatible with various international standards and can substitute for PRL, RCK, KTR, RFN, KLD, BK series components.

Keenly satisfied with the overall experience regarding this bulk order of KTR series locking assemblies. The logistics were handled exceptionally well; the shipment arrived ahead of the estimated schedule, which was a critical factor for our ongoing mining equipment maintenance schedule. All items were securely and professionally packaged, with clear labeling on each pallet, making inventory checks straightforward and efficient. The quality of the locking assemblies appears to be outstanding upon initial inspection. The machining is precise, the materials feel robust and are exactly as specified for heavy-duty industrial applications. There were no visible defects or inconsistencies across the entire bulk shipment, which speaks volumes about the manufacturer’s quality control standards. Regarding service, the communication from the supplier was proactive and clear from the quotation stage right through to post-delivery follow-up. They provided timely shipping updates and were responsive to all pre-sale inquiries. The documentation, including certificates and manuals, was complete and accompanied the shipment. This level of professional service, combined with reliable logistics and apparent high quality, makes this supplier a highly recommended partner for critical industrial components. The entire process was seamless and instilled great confidence for future procurement needs.
Bulk orders arrived promptly and were well-packaged, ensuring all items were secure and undamaged. Beyond expectations, the delivery was swift and handled with great care, which I truly appreciate. Building on that, the overall service was exceptional, with responsive support that addressed inquiries efficiently. Both the logistics and customer service were outstanding, making the entire process smooth and reliable. Better still, the products themselves appear to be of high quality, meeting our industrial standards perfectly. By choosing this supplier, we received consistent performance and dependable components for our mining equipment. Because of this positive experience, we are highly satisfied and plan to continue our partnership for future needs. Briefly put, everything from shipping to support was handled professionally, contributing to a seamless transaction. Beyond any doubt, this has been a commendable purchase that we would recommend to others in the industry.
The delivery was incredibly prompt and well-handled. Tracking information was provided and updated regularly, which made monitoring the shipment straightforward. The packaging was secure and professional, ensuring all components arrived in perfect condition without any damage. This attention to logistical detail is highly commendable and provided great peace of mind for a bulk order. Regarding the product quality, the locking assemblies appear to be manufactured to a very high standard. The materials feel robust and durable, exactly as one would expect for demanding mining applications. The finish and precision of the components are excellent, suggesting reliable performance and longevity in the field. From a service perspective, the entire process was seamless. Communication was clear, responsive, and helpful from the initial inquiry through to the final delivery confirmation. Any questions were addressed quickly and thoroughly. The overall experience was professional and efficient, making a potentially complex bulk procurement feel simple and reliable. I am very satisfied with this transaction and would confidently recommend this supplier based on this positive experience.
Fantastic experience from start to finish. The logistics were handled with impeccable precision. The shipment arrived ahead of the estimated schedule, which was a tremendous help for our project timeline. The packaging was robust and secure, ensuring every single locking assembly was perfectly protected during transit. There were absolutely no issues with customs or delivery documentation; everything was clear and professionally prepared. Regarding quality, the components are outstanding. They exhibit superior craftsmanship and durable construction, exactly as specified for heavy-duty mining applications. The materials feel premium, and the tolerances are precise, giving us full confidence in their performance and longevity under demanding conditions. The service provided was equally commendable. The support team was responsive, knowledgeable, and proactive in providing updates. Any preliminary inquiries were answered promptly and thoroughly, demonstrating a deep understanding of their product line and its industrial applications. The overall process was smooth, efficient, and entirely professional. This supplier has clearly mastered the integration of reliable logistics, uncompromising quality, and exceptional customer service. Highly recommended for any industrial procurement needs.
Q: The shipping process for this bulk order of KTR series locking assemblies was handled exceptionally well. I was initially concerned about the logistics given the size and weight of the shipment, but the supplier managed it flawlessly. The items arrived ahead of the estimated schedule, which was a pleasant surprise. All packages were securely packed with no signs of damage during transit. The tracking information provided was accurate and updated regularly, allowing for easy monitoring. Regarding the quality, the locking assemblies appear to be manufactured to high standards. They have a solid, robust construction that inspires confidence for use in demanding mining environments. The finish is clean, and the tolerances seem precise. From a service perspective, the communication throughout the ordering process was clear and professional. Any inquiries I had were answered promptly and thoroughly. The documentation, including packing lists and certificates, was complete and well-organized. Overall, this was a very satisfactory procurement experience from start to finish. The combination of reliable logistics, apparent high quality, and excellent customer service makes this supplier a strong candidate for future business. I would not hesitate to place another order for these industrial locking elements when the need arises.
The delivery was incredibly prompt, arriving well ahead of the estimated schedule. This was a huge relief for our project timeline. The packaging was robust and secure, ensuring all components arrived in perfect condition without any signs of damage during transit. Regarding the product quality, the locking assemblies appear to be manufactured to a very high standard. The materials feel substantial and the machining is precise, exactly as specified for demanding mining applications. Customer service was also commendable; the support team was responsive and provided clear communication throughout the ordering process. Overall, a very satisfactory experience dealing with this supplier for such critical industrial components. The efficiency from order placement to receipt was impressive.
Hats off to the logistics team for their exceptional handling of this bulk order. The delivery was remarkably prompt, arriving well ahead of schedule despite the large volume and specialized nature of the KTR series locking assemblies. Every pallet was securely packaged, with clear labeling that made inventory checks straightforward and efficient. The quality of the locking assemblies themselves is immediately apparent; each unit exhibits precise machining and a robust finish that instills confidence for their application in demanding mining environments. Customer service was equally impressive, providing clear communication throughout the ordering process and promptly addressing a minor documentation query. This seamless integration of reliable logistics, superior product quality, and attentive service made procuring these critical industrial locking elements a hassle-free and positive experience overall.
Hats off to the entire team for a truly seamless experience with this bulk order of KTR series locking assemblies. From the moment the order was placed, the logistics were handled with exceptional professionalism. The shipment arrived ahead of schedule, which is a remarkable feat for such a substantial industrial component delivery. Every single locking assembly was meticulously packaged, with no signs of damage or mishandling during transit. The quality of the components themselves is immediately apparent upon inspection; the machining is precise, the materials feel robust and durable, exactly as specified for demanding mining equipment applications. The service aspect was equally impressive. The communication was clear and proactive, with timely updates provided at every stage. Any preliminary queries were addressed promptly and with great expertise. This combination of reliable logistics, superior product quality, and outstanding customer service makes this supplier a highly recommended partner for critical industrial supply needs. The entire process instilled great confidence, and we look forward to future collaborations.
Vastly impressed with the overall experience regarding this bulk order of KTR series locking assemblies. The logistics were handled exceptionally well; the shipment arrived ahead of the estimated schedule, which was a crucial factor for our ongoing mining equipment maintenance schedule. All items were securely and intelligently packaged, preventing any transit damage. The quality of the locking assemblies appears to be outstanding, matching the technical specifications and expected industrial standards perfectly. They exhibit robust construction and precise machining. Customer service throughout the process was proactive and highly communicative, promptly addressing the preliminary logistics queries we had. The service team was knowledgeable and facilitated a smooth transaction from order placement to final delivery. This efficient coordination between logistics, product quality, and customer support made for a very reliable and satisfactory procurement process, ensuring we received the correct shaft locking devices and keyless couplings without any complications. The industrial locking elements were exactly as described, contributing to a seamless integration into our equipment. This positive experience reinforces confidence in future bulk supply needs for such critical components.