NOCRY NIW-400NM User manual
1/2 Inch Detent Anvil Impact
Wrench Instruction Manual
We've tried to make this manual useful, simple, and understandable.
Please read it carefully, and keep it safe for future reference.
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WHAT'S INSIDE THIS MANUAL
THE ABC'S OF IMPACT WRENCH SAFETY 4
Work area safety 6
Personal safety 7
Battery safety 8
Fast charger safety 8
Safety symbol meanings 9
TECHNICAL SPECIFICATIONS 11
INCLUDED ACCESSORIES & THEIR PURPOSES 13
HOW TO USE YOUR IMPACT WRENCH 14
How to turn the impact wrench on or off 14
How to select and change the rotation direction 15
How to adjust the speed 16
How to change a socket 16
How to fasten a nut or bolt 17
THE ABC’S OF NOCRY BATTERIES 19
How to remove or insert a battery 19
When to charge the battery 20
MAINTENANCE 21
How to clean your impact wrench 21
TROUBLESHOOTING 22
Battery is not charging 22
Anvil is stuck 22
Trigger is stuck 23
Unresponsive wrench 23
Socket will not catch 23
Socket falls out of anvil 23
Wrench feels hot 24
IMPACT WRENCH LIABILITY 24
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THE ABC'S OF IMPACT WRENCH SAFETY
Read all safety warnings and instructions before
using your impact wrench.
They're pretty reasonable, and neglecting them may result in electric shock, fire,
and/or serious injury. There are other (and much better) ways to get your
adrenaline going.
Save this manual for future reference, review in between uses, and make sure
that anyone who's going to test your new impact wrench has read and fully
understood all the information in here as well.
In case this manual disappears into the black hole that all manuals seem to fall
into, you can get a digital version of it at https://nocry.com/pages/instructions,or
by letting us know at [email protected].
So, let's get to it, shall we?
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Only use your impact wrench for its intended use. Would you use a
screwdriver to hammer a nail? Exactly. A suitable tool will do a job a
thousand times better and safer than one that wasn't designed for the task
at hand.
Do not use your wrench as a drill for drilling holes. Yes, we know it kind of
looks like a drill, but power tools equipped with shut-off clutches are not
designed for drilling applications. It drives bolts, not drills holes.
Before doing any work on the impact wrench either, tool change,
maintenance, or during cleaning, transport and storage, remove the battery.
Only use original NoCry compatible 20V batteries and chargers. See page
13 for more details.
Always use black-carbonized-drop forged impact rated sockets with the
impact wrench for all tightening or loosening purposes. Normal chrome
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sockets can easily fracture and explode from the high forces this tool can
produce.
Regularly check the socket for wear, cracks, or damage before placing it
onto the anvil of your impact wrench.
Before fastening a lug nut or bolt, check the torque with a torque wrench
and tighten to the recommended torque rating as the proper fastening
torque may differ depending on the type or size of the nut or bolt.
Always use a torque limiting device when installing lug nuts on wheels.
Forgetting to do so could result in broken lugs.
Be careful when driving long screws or bolts as the tool can slide off the
fastener head and cause injury.
To keep your impact wrench well-maintained, regularly check if any parts
are misaligned, damaged or broken, or if there's anything else that might
affect its performance. If you notice anything odd, definitely take it for repair
BEFORE using it.
Work or repairs on any power tool should only be carried out by a
professional. It’s best to leave the really serious stuff to a qualified repair
technician who only uses original replacement parts.
Make sure that anyone using your impact wrench or servicing it is
acquainted with this manual. The exception to the rule are children and
infirm people - they shouldn't be using your impact wrench even if they
remember every word written here.
5
Work area safety
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Keep your working area tidy and well lit. Accidents are much more likely to
happen in dirty, unorganized, or poorly lit workspaces - accidents that are
easy to avoid with basic upkeep.
Your impact wrench isn’t waterproof or splash proof. Under no
circumstances should you use it in the rain, spray with water, or immerse in
liquid or risk the danger of explosion or electrocution.
Do not operate your power tools in dusty or explosive areas, such as in the
presence of flammable liquids or gases, for a very simple reason - power
tools may create sparks which could ignite dust or fumes. Kaboom.
Secure any movable workpiece(s) you're working on. A workpiece secured
with suitable clamps or in a vice is much more likely to be steady and stay in
place than one held by hand.
Keep children and bystanders away. Distractions can easily cause you to
lose control, so consider operating your power tools a solo venture. You'll
catch up with everyone later, when you've made progress with your project.
If you absolutely must have children in the working area, ensure that
they're always closely supervised by another, responsible
, adult, and do
not interfere with your work.
Familiarize yourself with your local general rules of occupational health
and safety. The sooner you do that, the sooner you can start using your
impact wrench.
Only use your impact wrench, accessories, tool bits, etc. in accordance
with these instructions. Use of the wrench for anything other than its
intended use could result in a hazardous situation, loss of limbs and or life
AND voids your warranty (see page 25 for warranty details). In short, we
really, really don’t want you to have an accident. Really.
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Personal safety
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Vibration caused by the impact wrench action may be harmful to your
hands and arms. We recommend you use thick, cushioned gloves and take
regular breaks.
Only put your finger on the trigger switch when you are ready to start
using the wrench. Learn to never carry power tools with your finger on the
power switch or trigger - it only invites accidents.
Don't touch wrench sockets, lug nuts, and bolts right after using them at
high speeds. They get hot. Let them cool down first, or use suitable work
gloves before handling.
Make sure you have a firm grip on your wrench, it's really powerful and
has very fast moving parts.
Always wait until the impact wrench has come to a complete stop before
placing it down, moving onto the next task, or inserting a wrench socket.
Hold your impact wrench by its insulated handle grip when using in
situations where the fastener may come into contact hidden wiring. Zap!
Make sure there is nothing stuck in the anvil and that the socket is
correctly attached, before using your impact wrench. It moves fast. And it
can ruin your day even faster, if you're not careful.
There is a dress code - stick to it. Do not wear loose clothing or jewelry, and
keep your hair, clothing and gloves away from any moving parts to avoid
them getting caught.
Common sense is the best protection, isn't it? Stay alert and take regular
breaks. Exercise common sense, and do not operate your impact wrench
when you're tired, under the influence of drugs, alcohol, or strong
medication.
7
Battery safety
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Only use original NoCry 20V batteries. Use of unoriginal batteries may lead
to explosions. And who needs that?
The battery has built-in temperature-dependent overload protection:
When the load is too high or when the temperature goes above 158°F, the
speed of the wrench will automatically be reduced until it cools to within its
normal temperature range.
There is no need to open the battery itself, so don’t bother. You risk the
danger of it short-circuiting, being electrocuted and it will also void your
warranty (see page 25) - really
not worth it.
Hazardous vapors may be emitted from the battery if it's damaged. If you
smell fumes or feel other than your usual self, stop working, ventilate the
area properly, and seek medical help. The vapors can irritate the respiratory
system and are dangerous.
When a battery pack is not in use, keep it away from other metal objects
such as paper clips, coins, keys, nails, screws etc. Shorting the battery
terminals may cause burns or a fire.
Under abusive conditions, liquid may leak from the battery; stay well clear.
Liquid from the battery may cause irritation or burns. If you should make
accidental contact, make sure to wash affected areas thoroughly with water.
If liquid contacts eyes, seek immediate medical attention.
Fast charger safety
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Your fast charger is designed to charge your batteries indoors only and
away from living areas. Ideally batteries should be charged on a bench in a
workshop or garage. If you do not have such a space, charge your batteries
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away from people in an area of infrequent use, just in case anything should
happen. Better safe than sorry.
Keep your fast charger away from any kind of liquid or moisture, as we
don’t need to tell you - electricity and water don’t mix.
If the battery pack is cracked or damaged in any way, do not insert it in the
charger. There is a danger of electric shock or electrocution.
When charging multiple batteries, always allow the charger to cool down
before charging another battery.
Do not abuse the cord of the fast charger. Never use it for carrying or
pulling anything or forcefully unplug it. Keep the cord away from heat, oil,
sharp edges or moving parts. Damaged or entangled cords increase the risk
of electric shock.
Do not use the charger if it has been subjected to a heavy knock, dropped
or otherwise damaged in any way. Take the charger to an authorized service
centre for a check or repair or contact us at [email protected], and we'll
sort it out ASAP.
NB! NoCry Work & Safety Gear and the manufacturing plant shall not be liable for
any changes made to the tool, nor for any damage resulting from such changes.
Safety symbol meanings
These symbols are on your impact wrench for a reason - to keep you aware and
safe. Please take them into account.
This impact wrench conforms with North American safety
standards.
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Read the instructions before starting to use this impact wrench.
Do not throw this impact wrench out with regular waste, but
dispose of it in the appropriate manner so it can be recycled. See
page 24 for how to responsibly dispose.
This impact wrench is intended for indoor use only.
Exercise overall caution when operating your impact wrench.
This impact wrench has a thermal fuse rating of 266°F. Fuse will
blow to protect your drill should this temperature be exceeded.
This impact wrench is Class II (double insulated).
Do not expose or immerse the battery to moisture, rain or water.
Do not burn or expose the battery to heat or open flames.
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Battery has a max operating temperature of 122°F. This operating
temperature should not be exceeded.
Battery contains lithium ion. Do not dispose of batteries with
household items. Return exhausted batteries to your local
collection or recycling point.
TECHNICAL SPECIFICATIONS
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Model
NoCry NIW-400NM 1/2 Impact Wrench
Voltage
120V, 60 Hz
Rated voltage
20V
Nut-busting torque
300ft lb
Fastening torque
260ft lb
Anvil diameter
1/2inch
Max RPM
0-2200 rpm
Impact rate
0-2700 IPM
Sound pressure level
LPA = 95 dB(A)
KPA = 3dB(A)
Sound vibration level*
ah, AG = 9.09 m/s2
K = 1.5 m/s2
Battery type
Lithium-Ion 20V 4000mAh D.C
Battery model
NBP-4.0Ah
Battery max temp
122 °F
Battery charging time
2 hours
Total weight (main body
and battery attached)
5.7lbs
*The actual vibration level when using the angle grinder can deviate from the
indicated value, depending on how the tool is used.
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INCLUDED ACCESSORIES & THEIR PURPOSES
These are the accessories you should find included in your cordless impact wrench
kit. If there's anything missing, let us know to [email protected], and we'll sort it
out ASAP.
1 Canvas bag
For storing your new impact wrench. Elastic hook &
loop straps securely hold and store your tool, battery
and fast charger protecting them against accidental
knocks while carrying.
1 Belt clip
Comes unattached. Can be screw-fixed on either
side of the tool - whichever is more comfortable for
you. Be sure to only hang your tool from a work belt.
To attach, simply screw in using a screwdriver. Easy.
1 Rechargeable 20V 4 Ah battery
Holds charge for up to 1 hour if run continuously at
full speed. Rechargeable from 0 to 100% in
approximately 2 hours, and lasts for up to 200
charging cycles. Can be used with other NoCry
cordless power tools. 4 LED light indicators show
how much remaining charge is in the battery. See
page 20 for more details.
1 Fast charger
Charging station for your NoCry batteries only. LED
lights show when battery is fully charged. Charges
2Ah worth of power per hour, meaning it take will 45
minutes to charge a 1.5 Ah battery, 1.5 hours for 3
Ah, and 2 hours for 4Ah batteries.
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HOW TO USE YOUR IMPACT WRENCH
How to turn the impact wrench on or off
Your impact wrench doesn't have an on/off switch as such.
So…
To turn the wrench on…
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Attach battery pack, choose the rotation direction (find a how-to on page
15), and lightly squeeze the variable speed trigger switch.
To turn the wrench off…
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Release the speed trigger switch, and move the rotation direction switch to
center position, or disconnect the battery pack.
The impact wrench will not run unless the rotation direction switch is pushed fully
to the left or right. Be sure to keep a firm grip of the wrench when releasing the
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trigger, as you might experience slight kick-back.
Pro tip: Apply a little bit of counterforce in the opposite direction of kick-back when
releasing the trigger.
How to select and change the rotation direction
To prevent gear damage, always let the impact wrench come to a complete stop
before changing the direction of rotation.
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To move the anvil in a forwards/clockwise direction, push the rotational
direction switch to the left of the center position (if holding the wrench in
your right hand with the anvil facing away from you, use your index finger
and push to the left).
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To move the anvil in a reverse/anticlockwise, push the rotational direction
switch through to the right of the center position (if holding the wrench in
your right hand with the anvil facing away from you, use your thumb finger
and push to the right).
Cordless power tools are always in operating condition, which is why it is
important to push the rotational direction switch to the center position when you
aren’t using the tool or or are carrying it.
NB! There are directional arrows either side of the rotational direction switch to
indicate forward/reverse.
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How to adjust the speed
Using your finger, apply light pressure on the variable speed trigger switch to turn
the anvil in the selected direction. Further increase finger pressure on the trigger to
increase speed. Hold the trigger down fully for maximum speed. Feel the power.
How to change a socket
Before doing anything with your impact wrench, remove the battery pack to be
sure that the wrench is switched off.
To change the socket on your impact wrench…
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Align the hole in the socket with the detent pin on the anvil, using a small
pointed object (small screwdriver, or allen key works great!), push the socket
onto the anvil.
The detent pin will snap into place in the hole to secure the socket.
Always check that the socket is securely connected to the anvil before use.
To remove the socket, insert the tip of a small screwdriver or other thin
object into the hole in the accessory and press in the detent pin. Pull the
socket or accessory off the anvil using a bit of strength.
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Before using a socket, check to make sure there are no cracks or any visible
damage. Remember to choose sockets that match the nut/bolt you are working
with.
NB! Only use black-carbonized drop-forged impact-rated sockets. Normal
chrome sockets can easily fracture and explode from the high forces this tool can
produce.
How to fasten a nut or bolt
To get the best out of your impact wrench, we have some general tips for you to
consider. We don’t mean to patronize, so if you are a seasoned wrench user, you
can skip this bit.
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Before doing anything, always check and verify the rated maximum torque
capacity of the nut/bolt you are going to be working with and if necessary,
use a torque limiting device.
Check the directional rotation switch for the correct setting (forward or
reverse) to turn the impact wrench ‘on'. See page 15 for how.
Hold the tool firmly in one hand and place the socket along the axis of the
nut or bolt.
Squeeze the trigger switch to fasten the bolt or nut to the proper torque.
Release your finger from the trigger switch, to turn the impact wrench off.
Job done.
After fastening, always check the torque with a torque wrench.Use a
torque stick to ensure that you torque the lug nut to the specified foot
pound amount.
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The torque required to loosen a lug nut averages 75% to 80% of the
fastening torque, depending on the condition of the contacting surfaces.
However, if rust or corrosion causes seizing, more torque may be required.
On lighter jobs, run each fastener down to a relatively light torque and use a
hand torque wrench for final fastening.
Now let's move on to some more advanced tips…
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To help prevent damaging the fasteners or workpieces, always try to avoid
over tightening. Pay particular attention when tightening smaller fasteners
as they require less impacting to reach optimum torque.
A good habit to get into before starting your job is to practice with various
fasteners, noting the length of time required to reach the desired torque.
Check the tightness with a torque wrench. If the fasteners are too tight,
reduce the impacting time. If they are not tight enough, increase the
impacting time.
When fastening lug nuts to wheels, always thread the lug nuts by hand
first before taking an impact wrench to them. This avoids cross threading.
Ensure you have one hand on the tire to stop it from spinning as you work.
Failure to use the correct size socket will cause a reduction in the
fastening torque. A worn socket (wear on the hex end or square end) will
cause a reduction in the fastening torque. As previously mentioned, always
check your sockets for wear and tear.
Although the torque coefficient and the class of bolt may be the same, the
proper fastening torque will differ according to the diameter of the bolt.
Although the diameters of bolts may be the same, the proper fastening
torque will differ according to the torque coefficient, the class of the bolt and
the bolt length.
The use of universal joint or torque sticks (available separately) will reduce
the fastening force of the impact wrench somewhat. Compensate by
fastening for a longer period of time.
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Keep in mind that the way in which you hold the wrench or the material to
be fastened will affect the amount of torque needed.
THE ABC’S OF NOCRY BATTERIES
Only original NoCry 20V lithium ion batteries can be used with your cordless
impact wrench, using other branded batteries are incompatible and can lead to
injuries and pose a fire hazard.
How to remove or insert a battery
Place the the wrench on a flat surface and check the direction switch is in the
centre position.
To remove a battery…
1.
Hold the wrench by the handle in
one hand, and press and hold the
unlock button with the other.
2.
Gently slide the body of the tool
away from the base of the battery.
There’s no need to exert any
unnecessary force as you can damage
the battery power contacts.
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