Standard Door Handle Spindle Size

This size has become the standard size for modern spindles.
Standard door handle spindle size. Spindle 3 1 2 inch straight spindle set with screws for old style mortise door knobs view item 42940 rosette for door knob 2 1 4 inch dia. However we know that there are a number of latches particularly from the early 20th century that had a slightly smaller opening meaning that a 7mm spindle is required. White polished brass rosette trim plates price. It should be noted however.
A smaller portion are 5 16 square mostly for levers. Door handle spindle reducers are available in sizes 5mm 8mm 6mm 7mm 7mm 8mm 8 9mm and 8mm 10mm. The standard size you need to look out for is 57mm and this is the size between the lever centre or the spindle and the lock centre and thankfully that is a very popular uk size. The modern industry standard cross section thickness size of a door handle spindle is 8mm 5 16 square.
Along with a large selection of door handle spindle expansion sleeves adaptors which allow a smaller spindle to be used with standard door furniture. The center of a swivel spindle the part that ends up in the lock hubs may be fatter then the spindle ends. Spindles and followers were not always standardized to 8mm. Lever to lock size is 57mm on a typical interior locking door handle.