Features:

• The Dormakaba 40mm spindle inserts are a range of interchangeable spindles is available to provide greater floor clearance if required (e.g. doors with thresholds, carpeted floors etc)
• Suits BTS
• Finished in zinc

Calculating the necessary length of spindle extension

Extension = X – Floor clearance (normally 8 mm)

Collar height Z of the extended spindle inserts = Spindle extension length + 3 mm

(collar height of the standard spindle insert)