Lockwood C4 570E Extendable Base Cylinder – Cam & Keying Options

Extendable Base Oval Cylinder – U Cam Configuration

This extendable base oval cylinder is designed to provide maximum flexibility where custom cylinder lengths are required. Ideal for both residential and commercial applications, it allows precise adjustment to suit varying door thicknesses while maintaining reliable performance. Fitted with a U Cam, it is compatible with standard mortice locks and integrates seamlessly into new installations or retrofit projects.

Flexible Design with Advanced Keying Capability

The extendable base design enables installers to adjust the cylinder length on site, reducing the need for multiple fixed-size cylinders. Supplied primarily Keyed Differently (5KD), this cylinder also supports master keying and construction keying, making it suitable for projects requiring structured access control.

Compatible with Lockwood Generation 6 barrels, it supports modern keying systems while retaining proven mechanical reliability.

Key Features and Compatibility

• Cylinder Type: Extendable Base Oval Cylinder

• Base Design: Extendable for adjustable cylinder length

• Cam Options:

  • U Cam – compatible with standard mortice locks

  • V Cam – available on selected variants

• Keying Options:

  • 5KD – Keyed Differently

  • 5KA – Keyed Alike

  • 5PK – Construction keying

• Keying System:

  • Supports master keying systems

  • Accepts Lockwood Generation 6 barrels

• Applications:

  • Residential doors

  • Commercial and architectural doors

• Finish Options (variant dependent):

  • Satin Chrome

  • Chrome Plate

  • Polished Brass

  • Satin Brass

  • Black, Antique, and architectural finishes