Product Introduction – FH-70 Series V-groove for Fujikura FSM-70R/88R/90R Fusion Splicers
Overview
The FH-70 series V-groove is a precision replacement component designed specifically for Fujikura FSM-70R, FSM-88R, and FSM-90R fusion splicers. The V-groove (fiber alignment groove) is a critical part of the splicer’s core alignment system. It ensures accurate fiber positioning during the splicing process, directly affecting splicing loss and success rate. This series includes multiple specifications to accommodate various fiber coating diameters.
Model Description
The model number FH-70-250/12/900/6/8/4 represents a set or series of V-grooves with different groove sizes. The numbers indicate the fiber coating diameters (in µm or mm) that each V-groove supports:
| Suffix | Applicable Fiber Coating Diameter | Typical Use |
|---|---|---|
| 250 | 250µm | Standard single-mode/multimode fiber |
| 12 | 1.2mm (1200µm) | Tight buffer fiber or indoor cable |
| 900 | 900µm | Tight buffer fiber |
| 6 | 0.6mm (600µm) | Specialty fiber or thin coated fiber |
| 8 | 0.8mm (800µm) | Specialty fiber |
| 4 | 0.4mm (400µm) | Thin coated fiber |
Please select the appropriate V-groove according to your actual fiber diameter. All V-grooves are precision-machined to ensure optimal alignment with the splicer’s fixed V-groove system.
Key Features
1. High-Precision Manufacturing
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Precision-ground V-groove surface ensures accurate fiber cladding alignment (cladding-to-cladding).
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Extremely low surface roughness reduces fiber friction and prevents damage to the fiber coating.
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Manufactured to original equipment specifications for seamless compatibility with Fujikura splicers.
2. Optimized Splicing Performance
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Directly replaces the original V-groove component, restoring or improving splicing quality.
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Helps achieve typical splicing loss as low as 0.02dB for single-mode fiber and 0.01dB for multimode fiber.
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Maintains fast splicing cycles (approximately 7-9 seconds) when used with properly maintained splicers.
3. Durable and Wear-Resistant
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Made from high-hardness materials (e.g., precision ceramic or hardened metal alloy) to withstand repeated use.
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Resistant to dust and debris accumulation; easy to clean with standard fiber cleaning tools.
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Long service life, suitable for high-volume field and factory splicing operations.
4. Easy Replacement
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Designed for straightforward installation by trained technicians.
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Each V-groove is individually inspected for dimensional accuracy and surface quality before shipment.
Key Specifications
| Parameter | Specification |
|---|---|
| Compatible Splicers | Fujikura FSM-70R, FSM-88R, FSM-90R |
| Product Series | FH-70 |
| Available Sizes | 250µm, 400µm (0.4mm), 600µm (0.6mm), 800µm (0.8mm), 900µm, 1.2mm |
| Material | Precision ceramic / hardened alloy (depending on model) |
| Alignment Method | Cladding-to-cladding, fixed V-groove |
| Replacement Interval | As needed based on wear or damage (recommended inspection every 5,000 splices) |
Purchasing Recommendations
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Determine the coating diameter of your fiber before ordering.
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For standard telecom fibers (250µm), select FH-70-250.
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For 900µm tight buffer fibers, select FH-70-900.
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For 0.6mm, 0.8mm, 0.4mm, or 1.2mm specialty fibers, select the corresponding suffix model.
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If you need a complete set, the FH-70-250/12/900/6/8/4 kit includes all six sizes for maximum flexibility.
For technical support or bulk orders, please contact us.


















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