Optical cable reels typically feature a central spindle hole ranging from 25 mm to larger diameters depending on the reel type, with additional mounting holes such as 8.4 mm or M8 for chassis attachment.

Central Spindle Hole

The spindle bore is the main hole through which the reel is mounted or rotated on an axle. For example:

• The Prysmian F26 polymer reel has a spindle bore diameter of 25 mm for fiber cord deployment .
• Larger reels, such as wooden or heavy-duty polymer reels, may have reinforced spindle holes with steel bushings, and the exact diameter depends on the reel series and size . This hole ensures the reel can rotate smoothly on a shaft or axle during cable deployment or retrieval.

Chassis and Mounting Holes

For reels designed with mounting to a fixed surface, such as the Princetel FCR-1000 series:

• Top chassis holes: 4 holes with 8.4 mm diameter for securing the reel to a solid surface .
• Bottom chassis holes: 4 M8 x 1.25 tapped holes for additional mounting options . These holes are typically located on the side plates or cross angles of the reel chassis and are used for bolting the reel securely in place.

Summary

• Spindle bore (central hole): 25 mm for small polymer reels (F26) and variable for larger reels, often reinforced with steel bushings .
• Chassis mounting holes: 8.4 mm diameter or M8 tapped holes for secure attachment .
• Drum and side plate dimensions: Drum diameters range from 154 mm upwards, with side plates from 300–450 mm depending on the reel model . These dimensions ensure compatibility with deployment systems, axles, and mounting surfaces, while protecting the fiber optic cable during handling and transport.