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Hebei Speed Torque Transmission Technology Co., Ltd. is proud to introduce our Cold-Cut Expansion Sleeve — a precision-engineered component designed to deliver a reliable fit across a wide range of machinery applications. Since 2017, we have been dedicated to manufacturing high-quality transmission parts, and our expansion sleeve is the result of extensive R&D, rigorous testing, and a deep understanding of industrial needs. This product offers a simple yet effective solution for securing shafts, hubs, and couplings without the need for heat or hydraulic tools, reducing installation time and maintenance costs. Whether you are in heavy machinery, automotive, or energy sectors, our Cold-Cut Expansion Sleeve ensures consistent performance and long service life.
Key Features & Technical Specifications
Cold-Cut Expansion Design — The sleeve expands radially when tightened, creating a firm interference fit without thermal stress or deformation. Ideal for applications where heat-sensitive components are involved.
High Torque Transmission Capacity — Capable of handling high torque loads up to 12,000 Nm (depending on size), ensuring reliable power transmission even under heavy-duty conditions.
Durable Material Construction — Manufactured from high-strength alloy steel or optional stainless steel, with heat treatment for enhanced hardness and wear resistance. Surface treatments like phosphating or black oxide are available for corrosion protection.
Precision Machining — Tolerances as tight as ISO 2768-m (or better upon request) guarantee a perfect concentric fit, reducing vibration and improving overall machine efficiency.
Versatile Compatibility — Suitable for various shaft diameters from 20 mm to 300 mm, and can be customized to match specific hub profiles and keyway configurations.
Easy Installation & Maintenance — No special tools required; simply tighten the clamping screws to achieve the desired expansion. The sleeve can be disassembled and reused multiple times without damage to the shaft or hub.
| Parameter | Value |
|---|---|
| Material | Alloy Steel 40Cr / 42CrMo (or Stainless Steel 304/316) |
| Hardness (HRC) | 40–50 (after heat treatment) |
| Max Torque Capacity | Up to 12,000 Nm (size-dependent) |
| Shaft Diameter Range | 20 – 300 mm (customizable) |
| Precision Tolerance | ISO 2768-m (finer available) |
| Surface Treatment | Phosphating / Black Oxide / Zinc Plating (optional) |
Advantages Over Traditional Fitting Methods
Compared to shrink-fit or hydraulic expansion sleeves, our Cold-Cut Expansion Sleeve offers several distinct benefits:
No Thermal Expansion Required — Eliminates the risk of material distortion or burn damage, especially for precision components.
Lower Installation Skill Requirement — Simple tightening process reduces labor training time and human error.
Reusable Design — The sleeve can be removed and re-installed multiple times, reducing replacement costs.
Reduced Downtime — Quick installation and removal mean faster maintenance cycles, improving overall equipment uptime.
Environmentally Friendly — No need for heating or cooling fluids, minimizing energy consumption and waste.
Trusted by Global Industries
At Hebei Speed Torque Transmission Technology Co., Ltd., we have built a reputation for quality and reliability. Our factory spans 3,000–5,000 square meters and employs over 100 skilled professionals, ensuring every product meets strict quality standards. With an annual export value of US$5–10 million, we serve clients across North America, South America, Europe, Asia, Africa, and Oceania. Our products are shipped from major ports in Shanghai, Tianjin, and Qingdao, ensuring timely delivery worldwide. We are proud to hold ISO9001:2015 certification, which guarantees consistent quality management throughout our manufacturing process. Choose our Cold-Cut Expansion Sleeve for a dependable, cost-effective solution that boosts your machinery performance and reduces operational costs. Contact us today for a quote or technical consultation.
Frequently Asked Questions (FAQ)
What is the working principle of a Cold-Cut Expansion Sleeve?
The sleeve has a tapered inner bore and matching clamping screws. When the screws are tightened, the sleeve expands radially, creating a tight interference fit between the shaft and hub without the need for heat or hydraulic pressure.Can this sleeve be used on existing shafts without modification?
Yes, in most cases. The sleeve is designed to fit standard shaft diameters and keyway configurations. For non-standard sizes, we offer customization options.What is the maximum torque this sleeve can transmit?
The torque capacity depends on the sleeve size and material. Our standard range handles up to 12,000 Nm, but larger custom designs can achieve even higher values. Please provide your application parameters for a precise recommendation.Is the sleeve reusable after disassembly?
Absolutely. The Cold-Cut design does not damage the shaft or hub during installation or removal, allowing multiple reuses under normal operating conditions.What materials are available for the sleeve?
Standard material is high-strength alloy steel (40Cr, 42CrMo). We also offer stainless steel (304, 316) for corrosive environments, and other materials upon request.Do you provide surface treatment options?
Yes. Common treatments include phosphating, black oxide, and zinc plating. These provide corrosion resistance and improve wear properties. We can also apply special coatings based on your requirements.How do I select the correct size for my application?
Please provide the shaft diameter, hub bore diameter, keyway dimensions (if any), and torque requirements. Our engineering team will recommend the appropriate sleeve model and size.What is the typical lead time for orders?
For standard sizes, lead time is 15–25 working days. Custom orders may require 30–45 days, depending on complexity. We can expedite urgent requests with prior arrangement.
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