Want to drill faster?
Want to drill better?
IMPACT WRENCH DRILL CHUCK
DESCRIPTION
Cowan Chuck is a drill chuck designed to fit the square
rotor of an impact wrench. Now, an impact wrench can be used as a tool to drill materials such as concrete, cement, brick,
stone, wood, etc. An impact wrench makes a great hammer drill. This impact wrench drill utilizes the downward rotary hammer
movement to drill more efficiently. The hammer action only starts when needed, providing a nice clean hole. The Cowan
Chuck, made of steel, is a durable impact wrench accessory for a 1/2 inch impact wrench. The pneumatic impact wrench and 1/2
inch drill chuck combination stays cool on the job. It's air-cooled. You won’t get this impact wrench accessory
at a better price, and you won’t find this impact wrench accessory anywhere other than from J R COWAN Mfg.
OFFER:
Try my Cowan Chuck for 30 days. If at the end of the 30 days, you don’t think my Cowan Chuck is worth the money you
paid for it, Send it back with your explanation. I will refund your purchase price.
John Cowan
Frequently
asked Questions
What is an impact wrench? I know that I have heard of it. Remember the last time you had your tires changed? The technician walked over to the wheel of your
car. In his hand he held a gun like tool with a long air hose attached. He then squatted down. You heard a whirring sound
as the lug nuts were removed. That gun like tool is an impact wrench. What
is the difference between drilling with a hammer drill vs. an impact wrench? The
hammer in a hammer drill is more of a vibrator than a hammer. An impact wrench has a real hammer in it. For an excellent understanding
and inside view of both a hammer drill and an impact wrench please see the illustrations, theory of operation, and inside
views at www.right-drill.com What kind of force does an impact wrench deliver? The force is hundreds to thousands of pounds depending on the manufacturer and model. It is like
having a small drill with a jack hammer in it.
Wouldn’t thousands of pounds of force break the drill bit?
No because the hammer travel is limited inside of the impact wrench. It is only allowed to travel a fraction of an inch.
Doesn’t all of that force hurt your wrist?
Not really. The hammer action/turning can actually stall but you won’t feel the rotary “kick back” that
you get with an electric drill or hammer drill. In a stall, the electric drill wants to rip its way out of your hand.
Does the impact wrench drill faster than a hammer drill?
Yes, about 3X faster.
Does the impact wrench drill a clean hole?
Yes. By not applying a lot of pressure, you can start a hole clean without the use of the hammer. also, you can lighten
up at the finish of the hole. The hammer will stop and the rotor will still turn. The result is a clean hole through and through.
What materials is the impact wrench drill suitable for?
Cement, Concrete, stucco, brick, stone, wood, metal etc.
What drill bits does the Cowan Chuck accept?
Any drill bit that will fit into a ½ inch drill chuck. Many larger bits have shanks that are cut down to fit into a ½ inch
chuck. Cowan chuck accepts SDS drill bits too.
Drill bits get hot, don’t they?
In between the strokes of the impact wrench, the drill bit is cooling. With the hammer drill, the bit constantly turns.
The operator applies a constant force. In between vibrations, friction continues. The bit is continually heating up. Sometimes
they get so hot they discolor. With the impact wrench friction is much less. The hammer pulverizes the surface under the drill.
The bit only has to remove it. Result is a much cooler, longer lasting bit.
Impact wrenches run cooler than electric drills, right?
The electric drill gets hot! Sometimes you have to wear gloves. That is no fun on a hot summer’s day. The pneumatic
impact wrench NEVER gets hot.
Is the expelled air from the impact wrench useful?
The air expelled from the pneumatic impact wrench can be used to keep the debris away from the drill hole.
What about weight?
The impact wrench is much lighter. Many are less than 6 pounds. Electric drills get very heavy as the power requirements
increase.
Do the hammer drill bits come loose when drilling?
Sometimes they do. The vibration of the hammer drill sometimes causes the drill bits to loosen up when drilling. That is
why they came out with the SDS locking system.
Does the drill bits in the Cowan Chuck come loose when drilling?
No. With the Cowan Chuck, you don’t even need to use the key. Hand tighten the drill into the chuck. When you start
drilling, the hammer action auto tightens the chuck on the drill bit. When you stop drilling, you will find that the drill
is so tight in the chuck, that you can hardly loosen it with the key. To loosen the drill bit is easy…Drill in reverse!
Automatically, the bit loosens in the chuck. No more drill bits coming loose as with the hammer drill.
How does the impact wrench drill compare with the pneumatic drill?
The pneumatic drill runs at a much slower RPM. It has no hammer. The impact wrench starts fast to give a clean hole start.
It slows down to the optimum speed for drilling when the hammer starts.
What about prices?
You can buy a ½ inch impact wrench for as little as $20 and a compressor for less than $160. Our Cowan Chuck sells for
$20. That’s a total investment of $200. An SDS drill will cost a lot more than that. Many people already own a compressor.
Then the cost is only $40.
How about a rotary hammer
The rotary hammer pounds with a turning action. The forces exerted on the bit are extreme. The bits wear out so quickly
that they had to make a special, more expensive bit, to accommodate the heat and pounding forces. As the bit wears, debris
can become lodged at the base of the bit causing the bit to jam in the hole. The bit must be disconnected from the rotary
hammer and a tool such as vice grips used to pry the bit loose from the hole. Below is a picture of such a worn burnt bit.
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| Worn SDS Rotary Hammer Bit |
What else?
If you had to make a ¾ inch hole in a concrete wall, would you rather lean against a 5 pound impact wrench drill or try
to steady a 40 pound SDS hammer drill?
Cowan Chuck with an impact wrench is a Do-it-yourselfer and contractor's "must have" tool.
Anything else?
Yes. If you have a minute, I would like to share with you a true story. I wanted to install a fence around a pool. It was
July, so I started early. I found that I needed to drill 17, ¾ inch holes, 5 inches deep to accommodate the fence posts. So,
out came my hammer drill. Three minutes later the drilling was going nowhere. It came to me that I would have to start with
a 3/8 inch drill, graduate to a ½ inch, and finally I could drill the ¾ inch hole. That was 51 holes!!
Two hours later, I had 4 holes completed. That meant, that if I did not take any breaks, it would take another 6 and ½
hours!! By now the sun was up. The temperature was rising fast. The perspiration was running off of my forehead. The drill
was so hot that it felt and smelled as if it was about to burn up. There had to be a better way. I took a break.
As I mulled over the problem it dawned on me that what I needed was a better hammer drill. It came to me that an impact
wrench might work much better. The problem was that there is a square end on an impact wrench and no way to attach a chuck
for drilling.
I came up with a makeshift drill chuck attachment. The next day I tried my new drill chuck with my impact wrench. I was
delightfully surprised at how much faster and cooler I could drill the rest of the holes. That was how the Cowan Chuck enriched
my day.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ TESTIMONIALS: John,
Tested the chuck on concrete, brick etc. Like a hot knife through butter. After
years of blisters and burnt bits I had the solution under my nose (I have had a compressor and impact wrench for many years). Regards, Ray Phoenix,
AZ `````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` You list several great “Cowan Chuck”
features, but there's one benefit missing that I find very important. In fact it's one of the main reasons I
almost always grab my impact instead of my hammer drill...
The impact drill transmits a lot less torque shock to
my hands, wrists and arms. A LOT LESS. Not only can I drill holes more efficiently, but there’s far less fatigue!
I'm sure that translates to fewer injuries, both acute and repetitive. Regards,
Fred O Los Feliz, CA ```````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` comment: This
is a very good idea for an
electrician's new way of using
tools. I HAVE BEEN LOOKING FOR THIS TOOL FOR 16 MONTHS! Albert, Los
Angeles, CA ```````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` Harbor Freight - Impact Wrench
Harbor freight - Air Compressor
Harbor Freight - Masonry Drill Bits. See pages 5 & 8.
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