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M567
#WIP FUZES
Region
United States
Category
Ammunition, Missiles and precision weapons
Armament US 81 mm HE bombs, M374 series and WP bombs, M375 series used in US 81 mm mortars, M1, M29A1 and M252 . Development By US ordnance authorities for service bombs. Description The M567 is identical to the M935, except for the addition of a 2-12UNS to 1.5-UNF adaptor booster for use in 81 mm mortar bombs with 2 in threads. It is the addition of this booster that gives the M567 its additional length and weight in comparison to the M935. Safety is via a pull pin and arming pin that lock the arming slider. The
arming pin is retained by the M53 pyrotechnic delay and the pull pin. Before firing, the fuze is set by rotating a slotted shaft in the ogive and removing the pull pin. On firing, setback moves a plunger pin rearward against its spring, freeing a ball detent that releases the fuze firing pin. The firing pin is spring loaded and moves forward after acceleration, partially releasing the slider. Acceleration also moves a second plunger that releases a delay arming firing pin to the rear, functioning the M53 delay. When the delay train has buried from 2 to 6 seconds, it removes the arming pin from the slider that arms the super-quick or delay alignment. On impact, the fuze firing pin fires the M98 super-quick or M76 delay detonator that initiates the lead and booster.