Fuhr Genuine Multipoint Gearbox – Automatic Locking

This is the automatic locking gearbox from the Fuhr range. Please note that these gearboxes cannot be interchanged with regular Fuhr gearboxes. 

Fuhr 833 multipoint gearboxes are available in a large range of backsets including 35mm, 40mm, 45mm, 55mm, and 65mm, some of which may be available by special order. These gearboxes feature a deadbolt which throws 20mm. The gearbox measures 220mm x width + 18mm. The latch and deadbolt are both 31mm high and there is 61mm between the bottom of the latch and the top of the deadbolt. Gearboxes are fixed to faceplates with 3 screws.

Fuhr locks feature a ball bearing and spring pre-fitted. There is a tiny notch on the sliding internal strip that the ball bearing engages (under spring tension) and they give a more positive locking feel when handle operated. If you try a lock without this spring and ball bearing fitted, you’ll notice the difference. Some replacement gearboxes on the market are sold without the ball bearing and spring, but all of Duffells’ replacement Fuhr gearboxes come with these pre-fitted for a direct swap.

From the outside: the door can be opened using the cylinder key or access control. The door is locked on closing and can be deadlocked using the cylinder key.