Groz Impact Wrenches are precision-engineered tools crafted to handle the toughest fastening and loosening tasks in high-demand environments. These tools are specifically built to deliver exceptionally high torque output—far beyond what a conventional manual wrench can achieve—making them the ideal choice for tackling stubborn, rusted, or over-tightened bolts with ease.
Powered by either compressed air (pneumatic) or advanced lithium-ion battery (cordless) systems, Groz Impact Wrenches combine raw power with ergonomic handling, ensuring that users get efficient results with minimal strain and effort. The internal impact mechanism (often twin hammer or pin clutch) delivers rapid bursts of rotational force (impacts per minute), which break the bolt loose without damaging the fastener or surrounding components.
| Specification | 3/8" Impact Wrench | 1/2" Impact Wrench | 3/4" Impact Wrench | 1" Impact Wrench D - Handle |
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| Construction | Aluminium | Aluminium | Aluminium | Aluminium |
| Mechanism | Jumbo Hammer | Twin Hammer | Improved Twin Hammer | Pin-less Clutch |
| Max Torque @155sec | 360 Nm | 1223 Nm | 2522 Nm | 2522 Nm |
| Free Speed | 10,000 RPM | 8,000 RPM | 6,700 RPM | 4,000 RPM |
| Exhaust | Rear Exhaust | Front Exhaust | Rear Exhaust | Side Exhaust |
| Air Inlet Size | 1/4" | 1/4" | 1/4" | 3/8" |
| Air Hose I.D. | 3/8" | 3/8" | 3/8" | 1/2" |
| Avg. Air Consumption | 71 LPM (2.5 CFM) | 113 LPM (4 CFM) | 198 LPM (7 CFM) | 238 LPM (8.4 CFM) |
| Max Nut Capacity | M11 | M16 | M24 | M38 |
| Net Weight | 1.35 KG | 2.56 KG | 4.75 KG | 12.06 KG |
| Overall Length | 5-1/2" (140mm) | 6.7" (171mm) | 9.2" (235mm) | 20.3" (515mm) |
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| Usage Intensity | Intensive | Intensive | Intensive | Intensive |
| Speed Control |
5 speed position control |
6 speed position control |
3 speed positive control, full power in reverse |
3 speed position control |