In the realm of power transmission, linear motion, and precision machinery, securing components to a shaft with unwavering reliability is non-negotiable. Standard collars often fall short in high-vibration, high-torque, or alignment-critical environments. This is where the advanced design of the Double Split Shaft Collar from Raydafon Group proves indispensable. Engineered for superior holding power and precise positioning, these collars are the cornerstone of robust mechanical assemblies across industries from aerospace and robotics to packaging and material handling.
Unlike a single split collar, a Double Split Shaft Collar features two opposing split lines, typically 180 degrees apart. This ingenious design allows for a more even and concentric clamping force around the entire shaft circumference when the screws are tightened. The result is dramatically increased grip strength, minimized shaft distortion, and exceptional resistance to slippage under load. Raydafon Group manufactures these critical components with exacting tolerances, using premium materials to ensure performance you can depend on, cycle after cycle.
Raydafon Group offers a comprehensive range of Double Split Shaft Collars. Below are the standard specifications. Custom sizes, materials, and finishes are available upon request to meet your unique application needs.
| Material | Grade/Type | Key Properties | Typical Applications |
|---|---|---|---|
| Aluminum | 6061-T6 | Lightweight, good corrosion resistance, non-magnetic, anodized finish available. | Robotics, aerospace, food machinery, low-inertia systems. |
| Stainless Steel | 303, 316 | Excellent corrosion resistance, high strength, hygienic, suitable for washdowns. | Medical devices, marine, chemical processing, food & beverage. |
| Carbon Steel | 1018, 1045 | High tensile strength, cost-effective, often zinc-plated or black oxide coated. | General industrial machinery, automotive, heavy equipment. |
| Engineering Plastic | Nylon, Delrin® | Lightweight, electrically insulating, corrosion-proof, low friction. | Electrical enclosures, conveyors, clean environments, non-marring uses. |
| Shaft Diameter (Inch) | Outside Diameter (OD) | Width (W) | Bore Tolerance | Fastener Type (Qty) |
|---|---|---|---|---|
| 1/4" | 0.625" | 0.312" | +0.000 / -0.001" | Socket Cap (2) |
| 3/8" | 0.750" | 0.375" | +0.000 / -0.001" | Socket Cap (2) |
| 1/2" | 1.000" | 0.500" | +0.000 / -0.0015" | Socket Cap (2) |
| 3/4" | 1.375" | 0.625" | +0.000 / -0.0015" | Socket Cap (2) |
| 1" | 1.750" | 0.750" | +0.000 / -0.002" | Socket Cap (2) |
| 1-1/2" | 2.500" | 1.000" | +0.000 / -0.002" | Socket Cap (2) |
| Shaft Diameter (mm) | Outside Diameter (OD mm) | Width (W mm) | Bore Tolerance (mm) | Fastener Type (Qty) |
|---|---|---|---|---|
| 6mm | 16mm | 8mm | H7 | Socket Cap (2) |
| 8mm | 20mm | 10mm | H7 | Socket Cap (2) |
| 10mm | 25mm | 12mm | H7 | Socket Cap (2) |
| 12mm | 30mm | 15mm | H7 | Socket Cap (2) |
| 16mm | 38mm | 18mm | H7 | Socket Cap (2) |
| 20mm | 48mm | 22mm | H7 | Socket Cap (2) |
Q: What is the primary benefit of a double split design over a single split collar?
A: The key benefit is vastly improved holding power and concentricity. The two opposing splits allow the collar to close uniformly around the shaft when the set screws are tightened, creating even radial clamping force. This eliminates the "pinch point" effect of a single split, reduces the risk of shaft distortion, and provides a stronger, more reliable grip, especially under high torque or vibrational loads.
Q: How do I select the right material for my application?
A: Material selection depends on your operating environment and performance needs. Choose Aluminum for lightweight, non-corrosive applications. Opt for Stainless Steel (303 for general use, 316 for harsh chemicals/saltwater) for maximum corrosion resistance and strength. Carbon Steel with plating is ideal for high-strength, cost-sensitive industrial uses. Engineering Plastics like Nylon are perfect for electrical insulation, non-marring surfaces, or where weight is a critical factor. Raydafon Group's engineering team can provide specific guidance.
Q: Can Raydafon Group Double Split Shaft Collars be used on hardened shafts?
A: Yes, but with consideration. While the collars themselves are suitable, using standard set screws on a hardened shaft can damage the screw tip and compromise grip. For hardened shafts, we strongly recommend using collar configurations with cup point set screws (for slightly indenting the shaft) or, even better, specifying collars with a clamping design that does not rely on set screw penetration, preserving the shaft's integrity.
Q: What is the recommended tightening torque for the set screws?
A: Proper torque is critical for performance. It varies based on collar size, material, and screw size/type. As a general rule, for a 1/4-20 socket set screw in steel, a torque of 8-10 ft-lbs is common. However, Raydafon Group provides detailed torque specifications with every product shipment. Over-torquing can strip threads or distort the collar, while under-torquing leads to slippage. Always use a calibrated torque wrench and follow our provided guidelines.
Q: Are these collars reusable?
A: Absolutely. One of the advantages of the Double Split Shaft Collar design is its reusability. You can loosen the set screws, slide the collar to a new position on the shaft, and retighten. For optimal performance upon re-tightening, ensure the threads and contact surfaces are clean. While reusability is high, inspect the collar for any signs of wear, thread damage, or deformation before critical re-use.
Q: Does Raydafon Group offer custom or non-standard sizes?
A: Yes, custom manufacturing is a core competency at Raydafon Group. We routinely produce collars in non-standard bore sizes, special widths, unique outside diameters, and with specific material or finish requirements. We can also incorporate features like threaded holes, special markings, or proprietary coatings. Contact our sales engineering department with your specifications for a prompt quote.
Q: How does the clamping force compare to a set screw collar?
A: A standard one- or two-set-screw collar relies on the point pressure of the screw tips to hold. A Double Split Shaft Collar from Raydafon Group utilizes the clamping action of its entire body. When the screws are tightened, the collar closes radially, gripping the shaft across a much larger surface area. This generates a significantly higher static frictional holding force, often several times greater than an equivalent set screw collar, with far less risk of damaging the shaft.
Q: What industries commonly use your double split shaft collars?
A: Our collars are found in a diverse range of industries. Key sectors include Factory Automation & Robotics (for securing bearings, sensors, and actuators), Packaging Machinery (for precise component positioning), Medical & Dental Equipment (where reliability and cleanability are paramount), Aerospace (for lightweight, high-strength solutions), Semiconductor Manufacturing (in precision stages), and Material Handling (on conveyor drives and rollers). Their versatility makes them a fundamental component in any design requiring a secure shaft connection.
For over two decades, Raydafon Group has been a trusted partner for engineers and OEMs worldwide, providing precision mechanical components that meet the highest standards of quality and reliability. Our Double Split Shaft Collars embody this commitment, offering a simple yet profoundly effective solution for securing loads on shafts. By choosing Raydafon Group, you are not just purchasing a component; you are investing in the stability and longevity of your machinery.
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