An impact wrench is an essential tool for automotive repair, maintenance, and construction projects that require large of torque. If you're in the market for a new air impact wrench, there are several key factors you'll want to take into account before making your purchase.

Torque Output

The most central specification to review is the torque output, torque is measured in foot-pounds (ft-lbs) and represents the force the wrench can exert to loosen or tighten bolts. Impact wrenches with higher torque capacities can handle larger fasteners like wheel lug nuts on trucks or equipment bolts. For DIY tasks around the home, a wrench with a maximum torque of 250-350 ft-lbs should suffice.  500-1000 ft-lbs handle more demanding jobs like changing brakes or loosening rusted bolts. 1000 ft-lbs and above are necessary for tackling heavy equipment repairs or industrial tasks.

Drive Size

Another key consideration is the drive size, which must match your sockets. Most impact wrenches accommodate standard 1/2-inch drive sockets. Larger 3/4-inch and 1-inch drives are used for high-torque wheel service applications. It's wise to assess what sizes you already have in your socket collection prior to choosing a drive size, purchasing sockets in a different drive size can added costs.

Weight and Length

Consider the weight and length of the wrench, especially if you plan to use it for extended periods. A heavier wrench can be tiring to operate, while a longer one might be difficult to maneuver in tight spaces, so opt for a balance that suits your needs and comfort.

Air Consumption

Since air impact wrenches operate by utilizing compressed air, it's helpful to understand the air consumption rates. Air consumption is measured in cubic feet per minute (CFM). Higher CFM correlates to faster tightening/loosening speeds. However, higher CFM also requires larger compressors to maintain adequate airflow. Examine your compressor's capabilities and your power supply to make sure an impact wrench's air hunger can be satisfied. Insufficient airflow will lead to diminished torque, unpredictable power, and delays.

Rotational Speed 

Rotational speed measures how fast the anvil spins. Speed is denoted in revolutions per minute (RPM) or blows per minute (BPM) which counts each hammer strike during theTightening and loosening durations are shorter with higher RPM/BPM models. However, super-high speeds can be difficult to control during precision work. Moderate speeds in the 7,000 to 8,000 RPM range offer better balance and control for general automotive applications.  

Comfort Features

Since impact wrenches vibrate intensely during operation, comfort enhancers like padded rubber grips and multi-position exhaust diffuse vibrations transmitted to your hands and arms. These ergonomic accommodations enable longer work periods without painful tingling or loss of feeling in your hands - an important consideration for full-time professional use.

Other Features

Variable Speed Trigger: This allows you to control the speed of the wrench, facilitating greater precision for delicate tasks.

Forward/Reverse Switch: This allows you to easily switch between tightening and loosening nuts and bolts.

Twin hammer mechanism: Offers smoother operation and lower noise levels.

Anti-Vibration Handle: This helps reduce fatigue and improve comfort during extended use.

Noise Level: Consider the noise level, especially if you'll be working in noise-sensitive environments, wrenches with lower decibel ratings are quieter and more comfortable to use.

A dependable AEROPRO A398 air impact wrench matched to appropriate tasks provides efficiency for years of automotive, construction and industrial projects ahead.

The A398 boasts a cylinder design (45mm), strong torque. The swing knob is used to reverse the direction, and the forward rotation is equipped with 3 gears. Handle exhaust design to reduce noise.

Optimized the appearance of the design, the appearance is treated with aluminum alloy spray treatment, the design tool's center of gravity makes the tool have no forward feeling, and the hand feel is the best in the same specification.

Model: A398

Square Drive: 1/2''

Capacity Bolt Size:5/8”(16mm)

Free Speed: 7800RPM

Working Torque: 810ft-lb(1100N.m)

Air Inlet (NTP): 1/4''

Air Hose(ID): 3/8''

Net Weight: 2.39kg

Avg.air Consumption: 6.5cfm

Sug.air Comp: 3HP

Overall Length: 192mm

Working Pressure: 90PSI

AEROPRO has quickly risen to become an unrivaled global producer of air-powered devices including air tools, air spray gun, air nailer, airless paint sprayer, and etc.

AEROPRO seeks independent sales agent to represent and market our industry-leading pneumatic tools. We support OEM, ODM, OBM customization, small order quantity is acceptable and samples are available.

Make any cooperation possible. Any services related to the product, inquire with us now! Sales@Aeroprotools.Com