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CNC Locating Pins Technical Specifications
| Mandrel Types | Solid Taper Mandrels, Expanding Mandrels, Threaded Mandrels, Metal Spinning Mandrels |
|---|---|
| Primary Equipment | Star CNC Swiss-type Lathes, 4-axis CNC Machining Centers, Cylindrical Grinders |
| Dimensional Tolerance | Taper & Working Diameters: ±0.002mm; General: ±0.005mm |
| Geometric Tolerances | Concentricity: 0.003mm; Cylindricity: 0.002mm; Straightness: 0.005mm/100mm |
| Common Materials | GCr15 (AISI 52100), 9CrSi, SKD11, SUS440C, 42CrMo |
| Heat Treatment | Through Hardening, Vacuum Quenching (HRC 58-62 on working surfaces) |
| Surface Roughness (Ra) | Ground Working Surfaces: Ra 0.05 - Ra 0.1; Turned Surfaces: Ra 0.8 |
| Machining Features | Precision Tapers, Center Lubrication Holes, Retaining Threads, Keyway Slots |
| Surface Treatments & Cleaning | Hard Chrome Plating, Nitriding, Titanium Nitride (TiN) Coating, Ultrasonic Cleaning |
| Inspection Equipment | Japanese/German CMM, Taper Gauges, Roundness Testers, Hardness Testers |
Ultra-CNC Locating Pins for High-Accuracy Workholding and Forming
At Xierge Precision Machinery Co., Ltd., we leverage over 30 years of operational experience since 1990 to manufacture premium CNC Locating Pins for the industrial machinery, automotive, and medical sectors. Mandrels are critical workholding and forming tools used to support, clamp, or shape workpieces during machining, metal spinning, or extrusion processes. These highly specialized components demand extreme dimensional accuracy, flawless concentricity between the taper and the body, and superior surface hardness. In high-speed rotary applications or precision grinding setups, even a microscopic deviation in cylindricity or a slight surface defect can lead to workpiece distortion, runout errors, and scrapped production batches.
To achieve these exacting standards, our state-of-the-art facility is equipped with Japanese imported Star CNC Swiss-type lathes, advanced 4-axis CNC machining centers, and high-precision cylindrical and surface grinders. The guide bushing technology on our Swiss lathes provides continuous, rigid support, completely eliminating deflection when machining long, slender mandrel geometries. This specialized equipment allows us to turn complex tapers, machine precision threads, and drill micro-center lubrication holes in a single continuous setup, ensuring absolute coaxiality.
Following our core principle of "Integrity Oriented, Quality Foremost," we strictly adopt premium raw materials, such as GCr15 bearing steel, 9CrSi, and SKD11 tool steel, to ensure maximum wear resistance and structural integrity. We apply strict quality inspection protocols utilizing a complete set of testing instruments imported directly from Japan and Germany, verifying taper accuracy, hardness, and runout. We keep innovating to maintain sound business development and warmly welcome domestic and overseas clients to visit our factory and explore custom OEM/ODM cooperation opportunities.
Core Advantages of Xierge CNC Locating Pins
- Ultra-Precise Taper and Concentricity: Through advanced CNC cylindrical grinding and Swiss-type single-setup machining, we achieve extreme coaxiality between the mandrel taper and mounting body, eliminating workpiece runout.
- Zero-Deflection Slender Machining: Our Japanese Star CNC Swiss-type lathes utilize continuous guide bushing support, enabling the machining of high aspect-ratio mandrels without bending, ensuring superior straightness.
- Extreme Wear and Galling Resistance: We strictly select GCr15 and SKD11 tool steels, applying precise vacuum heat treatment to achieve HRC 58-62, providing excellent surface durability for continuous metal forming.
- Mirror-Like Surface Finishes: Equipped with high-precision cylindrical grinders, we achieve mirror finishes (Ra 0.05) on working surfaces, preventing workpiece scratching and ensuring smooth material flow during spinning.
- Thermal Deformation Correction: For hardened mandrels, we meticulously manage heat treatment and utilize precision grinding post-treatment to correct any micro-warping, restoring exact taper geometry and cylindricity.
- Advanced Surface Coatings: We coordinate hard chrome plating or TiN (Titanium Nitride) coatings to create a highly durable, low-friction surface layer, extending tool life in high-stress extrusion applications.
- 3-Decade OEM/ODM Innovation: Since 1990, we have continuously innovated, collaborating closely with clients to optimize DFM (Design for Manufacturing) for custom expanding mandrel assemblies, scaling seamlessly from prototyping to mass production.
Payment Methods & Global Logistics Solutions
Secure International Payment Terms:
To facilitate smooth B2B international trade, we offer flexible and secure payment options. For mass production orders of CNC Locating Pins, we accept standard T/T (Telegraphic Transfer) with a 30% advance deposit and 70% balance before shipment. For large-scale industrial machinery or automotive supply contracts, we are fully capable of processing Irrevocable Letters of Credit (L/C) at sight. For initial prototyping, sample orders, or custom tooling fees, PayPal and Western Union are also available to expedite the process.
Global Logistics & Protective Packaging:
We provide comprehensive end-to-end shipping solutions under FOB, CIF, and DAP Incoterms. For urgent prototypes or small batches, we utilize expedited international couriers such as DHL, FedEx, and UPS. For bulk mass production, we offer highly competitive sea freight (LCL/FCL) and air cargo rates through our trusted global forwarder network. Recognizing that mandrels are long, slender precision components with delicate ground tapers and fine threads highly susceptible to bending, pitting, and oxidation, we utilize specialized packaging: each mandrel is individually coated in anti-rust oil and wrapped in VCI (Volatile Corrosion Inhibitor) paper. To prevent point contact and bending, parts are suspended in custom rigid cardboard tubes or closely spaced multi-layer EPE foam slots, packed in sturdy export-grade cartons or wooden cases to ensure zero deformation during international transit.
FAQ
Slender components naturally deflect under cutting pressure. We utilize Japanese Star CNC Swiss-type lathes equipped with guide bushings that provide continuous, close-fitting support to the bar stock. We machine the center holes, tapers, and mounting threads in a single continuous setup. Finally, we support the part between precision centers during cylindrical grinding to guarantee absolute coaxiality.
Hardening high-carbon tool steels like SKD11 naturally induces slight thermal warping. We account for this by leaving a specific grinding allowance (typically 0.2-0.3mm) on critical diameters before heat treatment. Post-quenching, we utilize precision CNC cylindrical grinders to systematically remove the deformed layer, restoring the exact taper geometry, cylindricity, and straightness tolerances.
Yes. Expanding mandrel sleeves require uniform flexibility. We utilize our 4-axis CNC machining centers to wire-cut or precision mill uniform axial slits through the hardened sleeve. This ensures the mandrel expands concentrically without introducing stress concentrations that could lead to fracture under clamping pressure.
Standard metrology tools cannot accurately assess precision tapers. We utilize imported Japanese and German Coordinate Measuring Machines (CMM) and optical comparators to trace the taper profile and calculate the exact angle. For functional verification, we use blue matching (Prussian blue) against master taper gauges to verify the contact area exceeds 85%.
For metal spinning applications requiring high surface pressure and friction, we highly recommend GCr15 or SKD11 tool steel, hardened to HRC 58-62. After precision grinding, we apply hard chrome plating. This creates an extremely smooth, low-friction, and wear-resistant surface that prevents galling when the workpiece metal flows over the mandrel.
Absolutely. Internal burrs can block coolant flow and damage workpieces. We use specialized gun drills with optimized pecking cycles directly on the CNC lathes. This is followed by precision back-chamfering tools and rigorous ultrasonic cleaning to guarantee a 100% clear internal path for cutting fluid or compressed air.
