Binding Spines Office Products A4 51 mm (for 510 sheets), pack of 50, blue

Plastic binding spines by Office Products are designed for comb binding A4 documents with a 51 mm diameter, securing up to 510 sheets. This pack contains 50 blue spines intended for use with standard comb-binding machines. They provide a uniform, professional finish for reports, manuals and presentations while allowing pages to open flat for easy reading and photocopying.

Advantages

The 51 mm diameter spines offer high capacity for thick documents without compromising stability. Made of durable plastic, the spines resist deformation and maintain page alignment over time. Their standard comb design ensures compatibility with most comb-binding machines and simplifies document assembly and disassembly when pages need updating. The blue color provides clear visual identification and a consistent appearance for multiple bound documents.

Suitable for

• Binding thick reports, training manuals and handbooks
• Organising student theses, dissertations and academic projects
• Preparing presentations and business proposals
• Small print-shop or office binding tasks
• Producing manuals and user guides that require frequent page turning

Key specifications

• Format compatibility: A4
• Spine diameter: 51 mm (suitable for up to approximately 510 sheets, depending on paper weight)
• Material: durable plastic comb
• Color: blue
• Pack quantity: 50 spines
• Design: standard comb-binding profile for manual or electric comb binders

How to use

Prepare your document by aligning and punching the stack of A4 sheets according to your comb-binding machine's punching pattern. Fit a 51 mm plastic spine onto the machine's fingers, open the comb, insert the punched document onto the comb rings, and close the comb to secure the pages. Check that pages rotate freely around the spine and that the binding holds evenly along the punched edge.

Usage recommendations

For best results, verify the sheet capacity against the paper weight you use—heavier paper reduces the number of sheets the 51 mm spine can accommodate. Store spines flat in a dry environment to avoid warping. Use with compatible comb-binding machines and replace damaged spines to maintain a professional finish.