Pneumatic or electric? 1/2" or 3/4" drive? This guide matches impact wrench torque, drive size and type to your garage, fleet workshop or structural steel requirements across Assam and the Northeast.
An impact wrench drives nuts and bolts at high speed using repeated hammering impacts — far faster than a ratchet or torque wrench. They're essential in automobile workshops, tyre-fitting centres, vehicle assembly and structural steel construction across Northeast India. This guide explains what to look for.
| Pneumatic (Air-Powered) | Requires an air compressor (usually 150–200 L, 7–10 bar). Highest torque-to-weight ratio. Industry standard for busy garage bays. Fastest fastener cycle times. |
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| Corded Electric | Plugs into mains power. High continuous torque. Good for workshops with stable power supply in Guwahati and larger NE cities. |
| Cordless (Battery) | 18V or 20V Li-Ion. Good torque (250–600 Nm). Freedom of movement on-site — ideal for remote NE locations. Heavier with battery. |
| Hydraulic | For very high torque applications (structural bolts, flange bolts at refineries). Specialist equipment — call us for project requirements. |
| 3/8" (10 mm) Drive | Light-duty: motorcycle, small car wheel nuts, assembly work. 100–200 Nm range. |
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| 1/2" (12.7 mm) Drive | Most common. Passenger cars, light commercial vehicles, machinery maintenance. 300–700 Nm range. Suits most garages in Assam. |
| 3/4" (19 mm) Drive | Trucks, buses, heavy equipment, structural steel. 700–1500 Nm range. Tyre service centres and heavy fleet workshops. |
| 1" (25.4 mm) Drive | Mining, heavy industrial, offshore. 1500–3000 Nm. Specialist requirement. |
| Maximum Torque (Nm) | Check both 'maximum' and 'working' torque. Working torque is what the wrench reliably delivers in use — typically 60–70% of maximum. Size for your largest fastener. |
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| IPM / BPM | Impacts per minute. Higher IPM gives faster fastener cycling but more vibration. For continuous daily use, choose a model with anti-vibration features. |
| Free Speed (RPM) | Speed without load. Higher free speed finishes fasteners faster but may over-tighten on soft materials. Variable speed trigger helps. |
| Weight | Pneumatic are lightest (1.5–2.5 kg). Cordless with battery: 2.5–4 kg. Heavy wrenches cause fatigue in tyre bays — consider ergonomics. |
| Noise Level | Pneumatic impact wrenches are loud — 90–100 dB. Ear protection is required. Important for garages in residential areas of Guwahati. |
| Socket Compatibility | Impact-rated sockets only. Chrome-vanadium sockets crack under impact. Ensure you buy a matching impact socket set. |
The most common buyers of impact wrenches at our Guwahati counter:
Multi Trade Combines stocks pneumatic and electric impact wrenches at our AT Road, Guwahati counter. We also supply matching impact socket sets, air hoses, and inline oilers for pneumatic tools.
Browse our Power Tools catalogue and Garage Automation catalogue for related equipment. To order or enquire about a specific torque requirement, call or WhatsApp us — we ship to all Northeast Indian states from Guwahati.
Standard truck and bus wheel nuts in India require 300–500 Nm of torque for removal, and 400–600 Nm for heavy commercial vehicles. An impact wrench rated at 700–1000 Nm working torque provides a safe margin. Pneumatic half-inch or three-quarter-inch drive wrenches in this range are the standard choice at vehicle service centres across Assam.
Pneumatic (air-powered) wrenches give higher torque-to-weight ratios and faster fastener speeds, making them the standard for busy garage bays. They require a compressor — typically 150–200 litre 10-bar units. If you do not have a compressor, a brushless cordless electric impact wrench (18V or 20V) is a practical alternative for lighter work. We supply both types from our Guwahati counter.
Yes. Impact wrenches are used on structural steel connections — tightening high-strength bolts (HSFG bolts) on bridges and towers. For structural steel use, choose a three-quarter-inch or one-inch square drive unit with a calibrated torque output. This is separate from automotive use and requires the correct socket set. Call us to discuss the right spec for your project.