Fujikura CB-07 Replacement Blade for CT-08 Fiber Optic Cleaver – 48,000 Cleaves, Genuine AFL

Fujikura CB-07 Replacement Blade for CT-08 Fiber Optic Cleaver – 48,000-Cleave Life, Genuine AFL OEM Part

The Fujikura CB-07 is the genuine replacement blade for the Fujikura CT-08 (CT08) precision fiber optic cleaver. With a rated service life of 48,000 fiber cleaves, the CB-07 is the correct blade to restore your CT-08 cleaver’s cutting performance when the blade becomes dull — delivering the clean, low-angle end-faces required for low-loss fusion splices and fast connector terminations.

A worn cleaver blade is one of the most common — and most overlooked — causes of poor splice quality in the field. High cleave angles, lip defects, hackle marks, and fiber end-face chips all increase splice loss and connector insertion loss. Replacing the CB-07 blade at the recommended interval restores the CT-08’s cleave quality to factory specification, protecting the quality of every splice and termination that follows.

Key Specifications

Compatible Cleaver Models

If you are unsure whether the CB-07 is compatible with your specific cleaver model, please contact us before ordering. For the Fujikura CT-50 cleaver, the correct blade is the CB-08 — see our Fujikura CB-08 listing.

About the Fujikura CT-08 Cleaver

The Fujikura CT-08 is a high-precision fiber optic cleaver widely used in FTTH construction, telecom OSP splicing, and field termination. It is the standard cleaver bundled with many Fujikura fusion splicer kits, including the Fujikura 41S kit. The CT-08 uses a rotating blade system that presents a fresh cutting edge at each blade position — the CB-07 blade is the OEM replacement when all positions have been used and cleave quality begins to degrade.

Why Cleaver Blade Replacement Matters for Splice Quality

The cleaver blade is the most critical consumable in a fiber optic cleaver. It scores the fiber surface to initiate a controlled fracture, producing a flat, perpendicular end-face. As the blade dulls over thousands of cleaves, cleave quality degrades in several ways:

• Increasing cleave angle: A dull blade produces higher cleave angles (measured in degrees from perpendicular). IEC standards require cleave angles below 0.5° for singlemode fusion splicing — a worn blade frequently exceeds this threshold, causing high splice loss
• Lip and hackle defects: Dull blades produce lip defects (a raised ridge on the fiber end-face) and hackle marks (surface roughness), both of which increase splice loss and connector insertion loss
• Fiber end-face chips: A worn blade may chip the fiber end-face rather than producing a clean fracture, causing splice failures and wasted fiber
• Increased fiber breakage: A dull blade requires more scoring force, increasing the risk of fiber breakage during the cleave cycle

Replacing the CB-07 blade at or before the 48,000-cleave mark restores the CT-08’s cleave quality and eliminates blade-related splice loss and failures.

Signs Your Fujikura CT-08 Cleaver Needs a New Blade

• The cleaver’s blade position indicator has reached the end of its rotation range (the CT-08 rotates the blade to present a fresh cutting edge at each position)
• Cleave angles are increasing — the splicer’s cleave angle check shows angles above 0.5° consistently
• Splice loss is increasing on fiber types that previously spliced well, with no other obvious cause
• Lip or hackle defects are visible on fiber end-faces when inspected through the splicer’s camera or a fiber inspection microscope
• Fiber breakage during cleaving is occurring more frequently than expected

How to Replace the Blade on a Fujikura CT-08 Cleaver

1. Confirm blade replacement is needed — check the blade position indicator; if all positions are used, replacement is required
2. Open the cleaver and locate the blade holder assembly
3. Remove the worn CB-07 blade from the blade holder following the procedure in the CT-08 user manual
4. Install the new CB-07 blade in the blade holder, ensuring correct orientation and seating
5. Reset the blade position indicator to position 1 following the CT-08 user manual procedure
6. Perform test cleaves on scrap fiber to verify cleave quality before resuming production splicing or termination

Always follow the blade replacement procedure in your Fujikura CT-08 user manual. Incorrect blade installation can damage the cleaver or produce poor cleave quality.

CB-07 vs. CB-08: Which Fujikura Cleaver Blade Do You Need?

Always verify your cleaver model before ordering. The CT-08 and CT-50 are different cleaver models requiring different blades — the CB-07 and CB-08 are not interchangeable even though they share the same blade life rating.

Ideal Applications

• FTTH / FTTx fiber splicing maintenance — restoring CT-08 cleave quality during high-volume FTTH construction to maintain consistent low-loss splices
• Fast connector field termination — clean cleave quality is the most critical factor in achieving low insertion loss at fast connector terminations; the CT-08 is widely used for FTTH fast connector work
• Fujikura 41S splicer kit maintenance — the CT-08 is the standard cleaver in the Fujikura 41S kit; the CB-07 is the correct replacement blade for this configuration
• Telecom OSP fiber splicing — aerial, underground, and in-building fiber splicing with Fujikura CT-08 cleavers
• Preventive maintenance — scheduled blade replacement to maintain consistent cleave quality across field teams operating multiple CT-08 cleavers

Frequently Asked Questions

Q: What is the Fujikura CB-07?
A: The Fujikura CB-07 is the genuine replacement blade for the Fujikura CT-08 (CT08) precision fiber optic cleaver. It is rated for 48,000 fiber cleaves and is the correct blade to restore CT-08 cleave quality when the existing blade becomes dull.

Q: Which cleaver is the CB-07 compatible with?
A: The CB-07 is compatible with the Fujikura CT-08 / CT08 fiber optic cleaver. It is not compatible with the Fujikura CT-50, which uses the CB-08 blade.

Q: How many cleaves does the CB-07 blade last?
A: The CB-07 blade is rated for 48,000 fiber cleaves. The Fujikura CT-08 rotates the blade to present a fresh cutting edge at each position — replace the blade when all positions have been used or when cleave quality degrades before reaching 48,000 cleaves.

Q: How do I know when to replace the CB-07 blade?
A: Replace the blade when the CT-08’s blade position indicator has reached the end of its rotation range, when cleave angles consistently exceed 0.5°, when lip or hackle defects appear on fiber end-faces, or when fiber breakage during cleaving increases.

Q: What is the difference between the CB-07 and CB-08?
A: The CB-07 is for the Fujikura CT-08 cleaver. The CB-08 is for the Fujikura CT-50 cleaver. Both are rated for 48,000 cleaves but are not interchangeable — always verify your cleaver model before ordering.

Q: Is the CB-07 compatible with the Fujikura 41S splicer kit?
A: Yes. The Fujikura 41S fusion splicer kit includes the CT-08 cleaver as standard equipment. The CB-07 is the correct replacement blade for the CT-08 cleaver included in the 41S kit.

Q: Is the CB-07 a genuine Fujikura / AFL part?
A: Yes. The CB-07 is a genuine Fujikura / AFL OEM replacement blade, ensuring correct blade geometry and cutting performance for the CT-08 cleaver.

Q: Why does cleave quality affect splice loss?
A: Fusion splicing requires a flat, perpendicular fiber end-face (cleave angle below 0.5° for singlemode fiber). A poor cleave — caused by a worn blade — produces a tilted or defective end-face that cannot be fully corrected by the splicer’s arc, resulting in higher splice loss. Maintaining good cleave quality with a sharp CB-07 blade is the most cost-effective way to achieve consistently low splice loss.

Q: For support or bulk orders?
A: Contact us at info@splicermarket.com for B2B pricing, volume orders, or technical support.

Package Contents

• Fujikura CB-07 Replacement Blade ×1