OP 1664 - U.S. Explosive Ordnance (Vol. 2); Part 6 - Bombs and Bomb Fuzes; Chapter 20 - Bomb Fuzes; Section 2 - Army-Designed Bomb Fuzes: M152, and M153 (Tail Mechanical Aerial Burst)

U.S. EXPLOSIVE ORDNANCE

PART 6 - BOMBS AND BOMB FUZES

Chapter 20 - BOMB FUZES

Section 2 - ARMY-DESIGNED BOMB FUZES

M152, and M153 (Tail Mechanical Aerial Burst)

Bombs	Incendiary Cluster Adapter M23
Functioning	5 to 92 seconds; or instantaneous if slider aligned
Armed condition	When safety collar and arming pin are both out, and deto-nator is aligned under firing pin
Fuzes used with	Nose Fuze AN-M145
Arming time	Approximately 260 vane revolutions
Vane span, inches	3
Body diameter, inches	1.93
Over-all lenght, inches	6.2
Material	Aluminum alloy body with zinc- or cadmium-plated steel striker

General: The Tail Mechanical Aerial Burst Fuze M152 is the same as the AN-M145, except that the M152 has reversed vanes to that it will arm properly as a tail fuze. In addition a change was made in the construction of the thrust bearing for the arming vane assembly, to ensure free rotation with the reversed thrust direction of a tail fuze as compared with a nose fuze. The M153 has the reversed vanes, but not the additional thrust bearing.

The vanes of the M152 and M153 are painted red to distinguish them from nose fuzes.

Remarks: The M152 will replace the M153. The M153 fuze was being manufactured to provide tail fuzes to meet requirements pending availability of the M152.