M7 NC-4255QH 1/2-Inch Air Impact with EZ Grease
The M7 NC-4255QH combines a 1/2-inch pneumatic impact with an EZ Grease anvil lubrication feature. It is a maintenance distinction to consider alongside the separate forward and reverse torque specifications, rather than a reason to assume every fastener can be tightened to an exact value.
Specifications and included details
- 1/2-inch square drive and listed 1-inch bolt capacity.
- 200–800 ft-lb forward torque; 1,200 ft-lb maximum reverse torque.
- EZ Grease anvil feature; magnesium-alloy front housing and back head.
- 8,500 RPM free speed, 4.8 CFM average air consumption and 90 PSI specification.
Before ordering
Confirm approved lubricant and maintenance procedure in the model manual; lubricant inclusion is not established. Match impact-rated sockets to the 1/2-inch drive and compare the air setup with operating requirements. Verify specified final tightening torque independently.
Product questions and answers
What does EZ Grease change?
It provides a lubrication point in the anvil mechanism. Follow the manufacturer's specified lubricant and service procedure; the feature does not establish that grease or an applicator is included.
Is 1,200 ft-lb the forward torque rating?
No. It is the listed maximum reverse torque. The forward range is 200–800 ft-lb, and these performance figures are not calibrated fastening settings.
Does 1-inch bolt capacity mean it takes 1-inch drive sockets?
No. The square drive is 1/2 inch. Bolt capacity is a separate specification; choose the socket opening for the actual fastener.
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