0 a pneumatic drill
1 a powerful tool, held in the hands and operated by air pressure, that is used for breaking hard surfaces such as rock and roads
As you know, jackhammers cause angioneurosis, a serious illness caused by vibrations affecting huge numbers of construction workers.
Their sound has been described as a jackhammer being ground in a compactor.
Jackhammer was once clocked at two hundred blows per minute in testing.
Additionally, some users of pneumatic jackhammers may use a pneumatic lubricator which is placed in series with the air hose powering the air hammer.
Use of heavy jackhammers (heaver than 14 kg class) tends to cause cracking of the concrete all around the slots.
Hand-held jackhammers are typically powered by compressed air, but some use electric motors.
The effectiveness of the jackhammer is dependent on how much force is applied to the tool.
The typical approach is to saw cut and jackhammer out the slots for the dowels.
