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Northern Industrial Air Impact Wrench — 1in. Square Drive
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Northern Industrial Air Impact Wrench — 1in. Square Drive

Item# 157831

Only $289.99
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Manufacturer's Warranty: 12 months parts / 12 months labor

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Product Summary


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High-quality Northern Industrial Air Impact Wrench tackles the big jobs in the shop. Fixed left-hand support handle gives you additional control.

What's Included

  • (1) Impact wrench
  • (2) Sockets (38mm, 41mm)
  • (1) Hose barb
  • (1) Case

Features + Benefits

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  • Through-handle exhaust

Key Specs

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Item#157831
Ship Weight21.0 lbs
Drive (in.)1
Speed - No Load (RPM)4,600
Average Air Consumption (CFM)11
Max. Torque (ft.-lbs.)1,200
Hammer MechanismTwin
Variable SpeedYes
ReversibleYes
Inlet Size (in.)3/8
Min. Hose Size (in.)3/8
Case IncludedYes

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Extended Warranty

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Service Protection Plus

Manufacturer Warranty:
12 months parts / 12 months labor

Protect your purchase beyond the manufacturer's warranty
with Service Protection Plus!

DESCRIPTION (Click More Info for details) 1 Year Extension 2 Year Extension
Extended Warranty Replacement Plan
Only $34.99
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Only $54.99
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Extended Warranty + Accidental Damage Replacement Plan
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Drive (in.)
1/2 1/2 1 1 1
Speed - No Load (RPM) 8,000 9,000 3,200 4,600 5,000
Average Air Consumption (CFM) 4 4 8.7 11 10
CFM at Load
4.5 4.3 8.7 - 37
Operating PSI 90–120 90–120 90 - -
Working Torque (ft.-lb.) 200–900 200–950 2,300 - 100–900
Forward Torque (ft.-lbs.) - 200–950 2,300 - 900
Max. Torque (ft.-lbs.) 1,295 1,295 2,300 1,200 1,475
Nut Busting Torque (ft.-lbs.) - - 2,300 - -
Max. Reverse Torque (ft.-lbs.) - 1,295 2,300 - 1,475
Impacts Per Minute (IPM) 950 under load 1,400 400 - 830
Hammer Mechanism Twin clutch Twin Pinless Twin -
Variable Speed
No Yes Yes Yes Yes
Reversible Yes Yes Yes Yes Yes
Standard Bolt Capacity (in.) - 3/4 1.72 - 1 1/4
Inlet Size (in.) 1/4 1/4 1/2 3/8 1/2
Min. Hose Size (in.) 3/8 1/4 1/2 3/8 1/2
Noise Level (dB)
86 85 118 - 103.4
Tool Weight (lbs.) 4 1/2 4.5 37 - 27.8
Tool Length (in.) 8 1/4 7.5 24 - 20 1/8
Case Included No No Yes Yes -