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FUZE, POINT DETONATING: M8 |
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Filler and Weight | ||
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| NA, 0 | |||
| Body and Overall Weight | |||
| , 1.90 lb | |||
| Color | |||
| NA | |||
| Type of Round, DODIC | |||
| PD, 1390-N335 |
| Description: |
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| The aluminum body of the fuze contains a spring-loaded striker at the nose mounted within a movable circular retainer. The striker and integral firing pin are retained in the unarmed position by a shear wire (not shown in illustration) and a removable safety pin. Two safety balls are positioned by detents between the striker and the retainer. A slider containing the detonator and designed to position the detonator in line with the firing pin is mounted transversely in the fuze body and is secured by a setback pin. A hole or slot is present in the retainer of some fuzes for viewing position of the safety balls. A 14-inch long burster tube is threaded into the base of the fuze. |
| Use: |
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| Point Detonating Fuze M8 is a superquick action impact fuze used with 4.2-inch mortar gas and smoke cartridges. |
| Functioning: |
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| The safety pin is pulled from the fuze just prior to firing. Upon firing, as the cartridge moves up the barrel, the retainer, acted upon by setback, breaks the shear wire positioning a slot in the retainer wall to accept the safety balls. Centrifugal force moves the safety balls into this detent, and this movement assists the striker spring in forcing the striker forward about 1/4-inch to armed position. The firing pin on the lower end of the striker is withdrawn from a hole in the slider. At the same time, setback from firing withdraws the setback pin from the slider. Centrifugal force causes the slider to move outward until a shoulder contacts a stop on the fuze body, and another setback pin, also activated by centrifugal force, locks the slider in armed position. The detonator is now aligned with the firing pin, and detonation of the projectile will be superquick action at impact. |
| Munition Components: |
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| Data Source: |
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| TM 43-0001-28 |
| Munitions Tech Data Sheet: |
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