Chicago Pneumatic CP734H 1/2-Inch Drive Heavy-Duty Air Impact Wrench

by CP (Chicago Pneumatic)

Product Description

From the Manufacturer

The Dyna-Pact oil bath clutch on the top-selling CP734H 1/2-inch drive heavy-duty air impact wrench delivers smooth operation and extended durability. The CP734H is a perfect choice with power and economy for general repair, transmission work, exhaust systems and body shops. Working torque: 25-310 ft./lbs.; maximum torque: 425 ft./lbs.; blows per minute: 1020; free speed: 8400 RPM; average air consumption: 3.75 cfm; air inlet thread: 1/4-Inch NPTF; minimum hose size: 3/8-Inch; sound dBA: 93; length: 9.13-Inch, weight: 5.13 lbs.

Product Description

This Chicago Pneumatic 1/2in. heavy-duty air impact wrench with Dyna-Pact oil bath clutch to deliver smooth operation and extended durability. Delivers power and economy for general repair, transmission work, exhaust systems and body shops. Drive (in.): 1/2, Speed - No Load (RPM): 8,400, Average Air Consumption (CFM): 3.7, CFM at Load: 15, Working Torque (ft.-lb.): 25 - 310, Max. Torque (ft.-lbs.): 425, Max. Reverse Torque (ft.-lbs.): 425, Variable Speed: Yes, Reversible: Yes, Standard Bolt Capacity (in.): 9/16, Inlet Size (in.): 1/4, Min. Hose Size (in.): 3/8, Tool Weight (lbs.): 5.1, Tool Length (in.): 7 1/2

Product Details

• Product Dimensions: 9.1 x 8.9 x 3.3 inches ; 6 pounds
• Shipping Weight: 12.3 pounds (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B0002SRM38
• Item model number: CP734H
• Average Customer Review: 4.9 out of 5 stars  See all reviews (7 customer reviews)
• Amazon Best Sellers Rank: #29,660 in Home Improvement (See Top 100 in Home Improvement)
  • #61 in Automotive > Tools & Equipment > Impact Wrenches
  • #64 in Home Improvement > Power & Hand Tools > Power Tools > Impact Wrenches

Customer Reviews

Most Helpful Customer Reviews

22 of 22 people found the following review helpful:

5.0 out of 5 stars Family tradition ... my favorite impact wrench., December 12, 2007

By 

B. L. Ridenhour "Master of None" (Hernando, MS) - See all my reviews
(VINE VOICE)    (REAL NAME)   

This review is from: Chicago Pneumatic CP734H 1/2-Inch Drive Heavy-Duty Air Impact Wrench (Tools & Home Improvement)

[Helpful? Not? Please vote.] :: My father has had basically this same impact wrench since he was my age. They've changed the designation a little, but it's still the ol' CP734, and I KNOW I was using his 25 years ago (and it's still torquing). The thing I like about the CP is that it's light. Don't get me wrong, the Ingersoll-Rand Model 231 (also labeled as Matco and Snap-On, and probably a half dozen others) 1/2" impact is the industry standard, but you'll notice a REAL difference after about 4 tire rotations. The IR is heavy. It feels close to double (~8lbs vs. ~5lbs), and what it buys you is about 100ft-lbs of torque (this is not as advertised, but I'm telling you ... that's the way it is). However, unless you're working on heavy equipment, the CP is more than adequate to properly torque, if not wring off lug nuts.

You don't usually need the added torque of the IR, and you definitely don't need a tool that works you harder. The lighter weight makes work faster and easier, and the CP is also quieter by around half. I've had mine for over 10 years. I wouldn't have any of the $20-specials out there either. They look like tools, but they're really just toys. New guys in the shop would invariably chuck them ASAP once they had the $$ for a real wrench. The only "normal" automotive job I've seen the CP struggle with is the big CV joint nuts on Hondas ... most everything else in my experience was faster and easier. There are easy rebuild kits (that's how my Dad's is still in service after 30 years) that will make sure your CP734 is going strong indefinitely. I think he's put new vanes in his three times now ... The light weight, industrial grade quality and overall performance make this my choice, and believe me, when I worked as a mechanic, I had plenty of tools to choose from. This is the impact I kept. Remember to put a drop or two of light air tool oil in the air inlet each time you use it, and I know for a fact it can last you a lifetime.

7 of 7 people found the following review helpful:

5.0 out of 5 stars Just enough power, February 13, 2010

By 

JR (US of A) - See all my reviews

Amazon Verified Purchase

This review is from: Chicago Pneumatic CP734H 1/2-Inch Drive Heavy-Duty Air Impact Wrench (Tools & Home Improvement)

I like this wrench because its not too powerful so its a little easier on the hands, but it has enough power to do pretty much everything the $200-$300 wrenches can do. A lot of IR wrenches vibrate and are very clangy, while CP guns feel stable and the noise is muffled.

7 of 7 people found the following review helpful:

4.0 out of 5 stars Works great even with low CFM, June 26, 2009

By 

WillR2510 (New Hampshire, USA) - See all my reviews

This review is from: Chicago Pneumatic CP734H 1/2-Inch Drive Heavy-Duty Air Impact Wrench (Tools & Home Improvement)

I purchased this at the recommendation of a friend with the same model. I have a small IR compressor that spits out 5.3 CFM @ 40 psi and less at 90. Most of the wrenches needed more CFM but this one was on the low side. I am very happy to report that it gets the job done for me even with the low CFM. I am not using the gun @ NASCAR but for odd jobs around the house, it works fine. Could it work better with more CFM? Absolutely but if you use it in bursts, it works well. Construction is solid and it feels like a tool that will last for a long while.