Nico MK1 Shootbolt Gearbox uPVC Window Espag Lock

Nico MK1 Shootbolt Gearbox uPVC Window Lock - 20mm or 22mm Backset Centre Lock

Genuine Nico branded replacement gearbox – engineered for exact dimensional compatibility with your existing window system.

Genuine Nico MK1 Shootbolt Gearbox provides the exact direct replacement for your existing centre gearbox mechanism, eliminating the expense of complete window replacement. This authentic Nico-branded component matches the original factory specifications precisely, ensuring seamless integration with your current shootbolt extensions, keeps and handle configuration.

When your window lock fails, accepting generic alternatives risks compatibility issues, poor performance and voided warranties. This genuine Nico replacement guarantees dimensional accuracy and material quality that matches your original equipment manufacturer specification. Manufactured in Britain to ISO 9001 quality standards with Nico's renowned Supercoat corrosion-resistant finish, you're replacing like-for-like with authentic components engineered for exact compatibility.

Key Benefits:

• Genuine Nico Brand Quality – Authentic Nico-manufactured component, not a generic aftermarket alternative. Genuine branding ensures compatibility with existing Nico systems, maintains warranty validity, and delivers the quality standards that made Nico a trusted British security brand.
• Exact Dimensional Replacement – Precision-engineered to match original gearbox specifications exactly, ensuring direct fitment with your existing shootbolt extensions, keeps and handle configuration. No modifications, adapters or compatibility compromises required.
• Cost-Effective Window Repair – Replace only the failed gearbox mechanism rather than expensive complete window replacement, saving hundreds of pounds whilst restoring full security and functionality to original factory performance.
• British Engineering Excellence – Made in Britain to ISO 9001 quality standards with rigorous testing including PAS 24:2016 security approval and Secured By Design police specification, ensuring reliable long-term performance that matches original equipment quality.
• Superior Corrosion Protection – Nico's exclusive Supercoat finish provides BS EN 1670 Grade 5 corrosion resistance (480 hours salt spray testing), delivering exceptional durability in UK coastal and urban environments matching original component longevity.
• Enhanced Security Performance – Steel shootbolts lock into robust profile-specific keeps at vulnerable window corners.
• Versatile Installation Options – Suitable for standard eurogroove fitting with compatibility for low handle height applications and French window designs, offering flexibility for various uPVC window configurations.
• Proven Durability Testing – Endurance tested to 3 times the British Standard requirement with successful BS EN 13126-4 certification for durability, strength and function, ensuring reliable daily operation matching original component lifespan.
• Smooth Operating Mechanism – Precision-engineered gearbox delivers smooth, reliable closing action that maintains consistent performance throughout its service life, backed by a comprehensive 10-year mechanical guarantee from the manufacturer.

Product Specifications:

• Brand: Nico
• Lock Type: Shootbolt Centre Gearbox
• Backset Options: 20mm or 22mm
• Overall Length: 212mm
• Gearbox Length: 54mm
• Gearbox Depth: 33mm (20mm backset), 35mm (22mm backset)
• Faceplate Width: 16mm
• Handle Fixing Centres: 43mm
• Material: High-grade metal construction with Supercoat corrosion-resistant finish
• Version: Mark 1 (Standard configuration)
• Fitting: Standard eurogroove installation
• Compatibility: Modern uPVC window systems with Nico locking mechanisms
• Guarantee: 10-year mechanical guarantee
• Manufacturing: Made in Britain to ISO 9001 quality system

Critical Measurement Note: Exact dimensional matching is essential for direct replacement compatibility. Measure your existing gearbox backset (distance from spindle centre to faceplate edge) and overall length precisely. This genuine Nico replacement is engineered for exact fitment – ordering incorrect dimensions will prevent proper installation and lock engagement. When in doubt, photograph your existing gearbox with measurements marked before removal.

Pro Tips:

Pro Tip: Before removing your existing gearbox, verify it's a genuine Nico component by checking for brand markings on the faceplate. Photograph the installation clearly and measure the exact backset (spindle centre to faceplate edge), overall length and gearbox depth with digital callipers if available. Record these exact dimensions – genuine Nico replacements are precision-engineered for direct dimensional matching, not universal fit approximations. This documentation ensures you order the correct specification and confirms authentic Nico-to-Nico replacement compatibility.

Package Contents:

• 1 × Nico MK1 Shootbolt Centre Gearbox (please choose 20mm or 22mm backset when ordering)

Frequently Asked Questions:

How do I know if this genuine Nico gearbox will fit my existing window system?
This authentic Nico MK1 is designed as a direct replacement for existing Nico gearbox mechanisms with matching dimensions. The critical measurements are backset (20mm or 22mm from spindle centre to faceplate edge), overall length (212mm), and handle fixing centres (43mm). If your current window uses genuine Nico components, this replacement will integrate seamlessly with existing shootbolt extensions and keeps. Measure your existing gearbox precisely before ordering – genuine Nico replacements are engineered for exact dimensional compatibility, not universal fit compromises. For non-Nico systems, verify all dimensions match exactly as generic mixing can cause compatibility issues.

Can I use this genuine Nico gearbox with my existing shootbolt extensions and keeps?
Yes, if your window currently uses genuine Nico components. This authentic Nico MK1 centre gearbox is engineered for direct compatibility with the complete Nico shootbolt system range, including all genuine Nico extension rods and profile-specific keeps. As a direct dimensional replacement, you typically replace only the failed centre gearbox whilst retaining existing extensions and keeps – provided they're undamaged genuine Nico components. Mixing genuine Nico gearboxes with generic aftermarket extensions or keeps is not recommended as dimensional variations can compromise security and performance. Verify that extension rods show no wear and keeps remain securely fixed; worn or damaged components should be replaced with genuine Nico parts simultaneously.

What's the difference between 20mm and 22mm backset, and which exact dimension do I need?
The backset dimension determines precise cam positioning and lock engagement with frame keeps – exact matching is critical for direct replacement compatibility. Using incorrect backset dimensions will prevent proper lock engagement, compromise security and potentially damage components. Measure from the centre of your existing gearbox spindle hole to the outer edge of the faceplate – this exact measurement is your required backset. The 20mm backset is more common in standard uPVC window profiles, whilst 22mm is used in specific frame designs. This genuine Nico replacement must match your existing dimension exactly – there is no "close enough" with precision security components. If uncertain, remove your existing gearbox and measure carefully before ordering.

Will this genuine Nico replacement be as secure as my original window lock?
Yes – as an authentic Nico-manufactured component, this gearbox matches or exceeds your original equipment security standards exactly. Genuine Nico MK1 components have been successfully tested as critical components within PAS 24:2016 security standards and carry Secured By Design approval as a Police Preferred Specification. The steel shootbolt system with mushroom cams provides enhanced resistance against forced entry at vulnerable window corners. Crucially, using genuine Nico replacements maintains system integrity – generic alternatives cannot guarantee the dimensional precision, material quality and testing pedigree that authentic Nico components deliver. When properly installed with genuine Nico keeps and extensions, this gearbox provides professional-grade security matching new window specifications.

How long will this gearbox last, and what maintenance does it require?
The Nico MK1 has been endurance tested to 3 times the British Standard requirement and comes with a 10-year mechanical guarantee, indicating exceptional durability expectations. The Supercoat corrosion-resistant finish provides Grade 5 protection (480 hours salt spray testing), ensuring long-term performance in harsh UK weather conditions. Minimal maintenance is required – an annual application of PTFE spray lubricant to moving parts and occasional cleaning of the eurogroove channel will maintain smooth operation. Avoid petroleum-based lubricants which can attract dirt and degrade seals.

Why Choose Genuine Nico MK1 Shootbolt Gearbox?

When your uPVC window lock fails, the temptation to save money with generic alternatives is understandable – but false economy. Genuine Nico components guarantee exact dimensional compatibility with your existing system, eliminating the compatibility risks, performance compromises and voided warranties that aftermarket parts introduce. This authentic Nico MK1 provides direct replacement with matching dimensions, ensuring seamless integration with your current extensions, keeps and handle configuration without modifications or adapters.

You're not settling for "close enough" – you're restoring your window to original factory specification with precision-engineered components that carry the Nico name. Manufactured in Britain to demanding ISO 9001 standards and rigorously tested to exceed British Standards for security (PAS 24:2016), durability and corrosion resistance, genuine Nico quality represents intelligent home maintenance. The comprehensive 10-year manufacturer's guarantee and Secured By Design approval deliver confidence that generic alternatives cannot match. Take pride in maintaining your home to the highest standards with authentic Nico components engineered for exact compatibility and lasting performance.