A PNEUMATIC SINGLE-IMPULSE RAPPER FOR ELECTROSTATIC PRECIPITATORS COMPRISING A PISTON MADE FROM DRY-LUBRICATING MATERIAL WITHIN A UNITARY, FLANGE LESS, CYLINDRICAL HOUSING HAVING NO BOLTED CONNECTIONS, WITH THE PISTON BEING RETURNED TO ITS PRE-PULSE POSITION BY A SPRING HAVING REDUCED DIAMETER END COILS, SAID PISTON INCLUDING A SPHERICAL OR ALTERNATE STRIKING SURFACE FOR LOCALIZED IMPACT AGAINST THE END OF THE HOUSING, SAID HOUSING INCLUDING A NON-REMOVABLE CAP AND AN AIR INLET ADAPTED TO SECURE A STRENGTHENED AIR FITTING TO THE HOUSING. A BRAIDED WIRE PROVIDES ELECTRICAL GROUNDING OF THE RAPPER.