UTIU – M72 B1  FUZE  ( AU – 18 )
 
       
     
*UTIU – M72 B1  is  point – detonating, mechanical fuze of superquick, inertia and
delay action  adjustable by sleeve turning and cap removing.
*
       
        
A.  PURPOSE
*The fuze  is  intended  for  HE grenades , Cal. 85, 100, 122, 130, 152 and 155 mm.
 
         B.  TECHNICAL   DATA
*Safety ------------------------------------------------------------- as per  MIL – STD – 1316  B
*Arming type --------------------------------------------------------- inertia and pyrotechnical
*Minimum arming condition :
                   - acceleration ------------------------------------------------------------------ 3000 g
                   - rotation -------------------------------------------------------------------- 4000 rpm
*Drop safety ----------------------------------------------------------------------------------- 1,75 m
*Tightness ------------------------------------------------------------------------------- waterproof
*Fuze mass  ------------------------------------------------------------------------------------- 460 g
*Fuze lenght ------------------------------------------------------------------------ max 105,7 mm
*Fuze lenght entering the grenade -------------------------------------------- max 46,8 mm
*Fuze connecting thread --------------------------------------------------- SpW 36,14 x 2,54
*Maximum  fuze diameter ----------------------------------------------------------------- 40 mm
        
         C.  FUNCTIONAL  DATA
*Muzzle safety ---------------------------------------------------------------------------- min. 10 m
*Action  type ------------------------------ superquick, inertia and delay 0,020 to 0,050 s
*Temperature range of use -------------------------------------------------  - 30°C  to + 50°C
*High  safety during handling, transportation  and  storing.
*Environment  test ----------------------------------------------- as  per  MIL – STD – 331 A
*Usage  period is  minimum  5  years  under  prescribed keeping and storing
conditions.