Quick Answer
A corded electric impact wrench plugs into a wall outlet to deliver high torque for removing stubborn fasteners such as lug nuts and bolts. According to retailer listings, common specs include 7.5 A motors producing around 450 ft‑lbs of torque, with drive sizes from 1/2″ to 3/4″. Use the decision framework below to match a model to your work.
Main Explanation
A corded impact wrench draws power from a continuous electrical supply, so it never runs out of battery. The trade‑off is a cord that limits mobility. When choosing one, follow these steps:
- Determine the torque you need. For most automotive tasks (lug nuts, suspension bolts), 450 ft‑lbs is a common target. Heavier equipment may require higher torque.
- Pick the drive size. 1/2″ drive fits standard sockets and covers most passenger‑vehicle work. 3/4″ drive is for industrial applications such as large trucks.
- Compare amp ratings. Higher amperage generally means more torque. Entry‑level models run 7.5 A, while some budget options are 8.5 A. Professional units may have different ratings.
- Choose socket retention. Friction rings allow quick socket swaps but can drop sockets; detent pins are more secure.
- Check cord length and weight. A longer cord (6 ft or more) gives more reach without an extension.
- Set a budget. Prices range from under $75 to over $500.
- For a weekend mechanic, a 1/2″ corded model with ~450 ft‑lbs (such as the 7.5 A option in ) is sufficient for most car repairs.
- If you service heavy equipment, a 3/4″ drive from Milwaukee or Makita offers rugged construction and industrial socket retention.
- Corded wrenches give constant power but require a nearby outlet. Consider an extension cord rated for the tool’s amperage.
#### Example Models from Listings
| Model / Source | Drive Size | Amp Rating | Torque (approx) | Price (approx) |
|---|---|---|---|---|
| Heavy‑Duty 7.5 A | 1/2″ | 7.5 A | 450 ft‑lbs | Not specified |
| Harbor Freight 8.5 A | 1/2″ | 8.5 A | Not specified | $74.99 |
| Bauer (Harbor Freight) | 1/2″ | Not specified | Not specified | $94.99 (sale) |
| Milwaukee 9075‑20 | 3/4″ | Not specified | Not specified | $571.06 |
| Makita 6906 | 3/4″ | Not specified | Not specified | Not specified |
| Makita TW0350 | 1/2″ | 3.5 A | Not specified | $389.58 |
Note: Specs and prices are taken from retailer pages and forum discussions; no independent testing was performed.
