In this video I am disassembling a SEIKO 4502 movement. This is a follow on to part 1 which is here - • [TECH] SEIKO "KING SEI...
As a clarification on the way the gear train works, as I muddled it up in the video, the barrel drives the center wheel, which drives the intermediate wheel, which drives the large driving wheel which drives the fourth wheel, which drives the escape wheel which drives the sweep second wheel.
Because of this unorthodox gear train, the second hand has a noticeable stutter from time to time, as it only needs a small amount of backlash in the gears to generate stutter.
The very long sweep second hand accentuates this quite a bit. There is no tension spring of any sort to smooth this out and just seems to be part of the movement.
#seiko #vintage #watches #horology #japanese #king seiko #KS #45ks #hibeat #36000
Негізгі бет Ғылым және технология [TECH] SEIKO "KING SEIKO" 4502-7001 "45KS" Teardown PART 2 - MOVEMENT
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