Measuring Cylinder Lengths on Period Timber Doors with Heavy Mouldings
Engineering Overview: Installation guide for measuring solid timber doors with raised decorative panels and beaded mouldings to prevent thumbturn binding.
Technical & Engineering Specifications
| Prevents | Thumbturn knob scraping against timber mouldings |
|---|---|
| Door Type | Period Solid Timber Doors with Raised Mouldings |
| Measurement Rule | Measure to highest outer peak of decorative trim |
| Recommended Hardware | Extended-Shank Thumbturn Euro Profile Cylinders |
Decorative Moulding Clearance
Solid timber entrance doors often feature raised decorative panel mouldings that project 10 mm to 20 mm beyond the door leaf face.
Correct Measurement Datum
- Measure to Finished Trim: Measure from the central M5 screw axis to the highest point of the decorative moulding, not just the flat door leaf.
- Avoid Recessed Binding: Failing to include moulding depth causes thumbturn knobs to collide with the wood moulding during rotation.
Frequently Asked Engineering & Selection Questions
Q1: What is the key installation rule for this cylinder?
Installation guide for measuring solid timber doors with raised decorative panels and beaded mouldings to prevent thumbturn binding.