Cornwell Tools CAT-320AN User manual

CAT-320AN 1 Rev. 04/01/02
Operating Instructions • Warning Information • Parts Breakdown
CAT-320AN
Heavy Duty
Air Nibbler
Strokes Per Minute . . . . . . . . . . . . . . . . .2600
Air Inlet . . . . . . . . . . . . . . . . . . . . . . .1/4 NPT
Hose Size . . . . . . . . . . . . . . . . . . . . . . .3/8 I.D.
Air Pressure . . . . . . . . . . . . . . . . . . . . . .90 PSI
Air Consumption . . . . . . . . . . . . . . . . .4 CFM
Sound Level . . . . . . . . . . . . . . . . . . . .93 dBA
Length . . . . . . . . . . . . . . . . . . . . . . . .7-1/16"
Net Weight . . . . . . . . . . . . . . . . . . . . .2.2 Lbs.
SPECIFICATIONS
Some dust created by power sanding, sawing, grinding, drilling,
and other construction activities contains chemicals known to
cause cancer, birth defects or other reproductive harm. Some
examples of these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement
and other masonry products, and
• arsenic and chromium from
chemically-treated lumber.
Your risk from these exposures varies, depending on how often
you do this type of work. To reduce your exposure to these
chemicals: work in a well ventilated area, and work with
approved safety equipment, such as those dust masks that are
specially designed to filter out microscopic particles.
ALWAYS READ
INSTRUCTIONS
BEFORE USING
POWER TOOLS
ALWAYS WEAR
SAFETY GOGGLES
WEAR HEARING
PROTECTION
AVOID
PROLONGED
EXPOSURE TO
VIBRATION

CAT-320AN 2 Rev. 04/01/02
WARNING - FOLLOW THESE RULES FOR SAFE OPERATION!
This Instruction Manual Contains
Important Safety Information.
READ THIS INSTRUCTION
MANUAL CAREFULLY AND
UNDERSTAND ALL INFORMATION
BEFORE OPERATING THIS TOOL.
• Always operate, inspect and maintain this
tool in accordance with American National
Standards Institute Safety Code of
Portable Air Tools (ANSI B186.1)
and any other applicable safety
codes and regulations.
• For safety, top performance and
maximum durability of parts, operate
this tool at 90 psig 6.2 bar max air pressure with
3/8” diameter air supply hose.
• Always wear impact-resistant eye
and face protection when operating
or performing maintenance on this
tool. Always wear hearing protection
when using this tool.
• High sound levels can cause
permanent hearing loss. Use hearing
protection as recommended by your
employer or OSHA regulation.
• Keep the tool in efficient operating
condition.
• Operators and maintenance personnel must
be physically able to handle the bulk, weight and
power of this tool.
• Air under pressure can cause severe injury.
Never direct air at yourself or others. Always turn
off the air supply, drain hose of air pressure and
detach tool from air supply before
installing, removing or adjusting any
accessory on this tool, or before
performing any maintenance on
this tool. Failure to do so could
result in injury. Whip hoses can cause
serious injury. Always check for
damaged, frayed or loose hoses and
fittings, and replace immediately.
Do not use quick detach couplings
at tool. See instructions for correct
set-up.
• Air powered tools can vibrate in use. Vibration,
repetitive motions or uncomfortable positions
over extended periods of time may be harmful to
your hands and arms. Discontinue
use of tool if discomfort, tingling
feeling or pain occurs. Seek medical
advice before resuming use.
• Place the tool on the work before
starting the tool. Do not point or indulge in any
horseplay with this tool.
• Slipping, tripping and/or falling while operating
air tools can be a major cause of serious injury or
death. Be aware of excess hose left on
the walking or work surface.
• Keep body working stance
balanced and firm. Do not
overreach when operating the tool.
• Anticipate and be alert for sudden changes
in motion during start up and operation of any
power tool.
• Do not carry tool by the hose.
Protect the hose from sharp objects
and heat.
• Tool shaft may continue to
rotate briefly after throttle is
released. Avoid direct contact with accessories
during and after use. Gloves will reduce the risk
of cuts or burns.
• Keep away from rotating end of tool. Do not
wear jewelry or loose clothing. Secure
long hair. Scalping can occur if hair
is not kept away from tool and
accessories. Choking can occur if
neckwear is not kept away from tool
and accessories.
• Cutting with these tools will create sharp
edges. Wear gloves to protect hands.
• Avoid direct contact with accessory and work
surface during and after work.
• Cutting edges and saw blades can become hot
during use. Do not touch.
• Never force the tool to cut faster or through
heavier gauge material than rated capacity.
• Do not lubricate tools with flammable or
volatile liquids such as kerosene, diesel or jet fuel.
• Don’t force tool beyond its rated capacity.
• Do not remove any labels. Replace any
damaged labels.

CAT-320AN 3 Rev. 04/01/02
Nipple
AIR SUPPLY
Tools of this class operate on a wide range of air
pressures. It is recommended that air pressure of these
tools measure 90 PSI at the tool while running free.
Low pressure (under 90 psig; 6.2bar) reduces the speed
of all air tools. Low air pressure not only wastes time,
but also costs money. Higher pressure (over 90 psig;
6.2 bar) raises performance beyond the rated capacity
of the tool which will shorten the tool’s life because of
faster wear and could cause injury.
Always use clean, dry air. Dust, corrosive fumes and/or
water in the air line will cause damage to the tool.
Drain the air tank daily. Clean the air inlet filter screen
on at least a weekly schedule. The recommended
hookup procedure can be viewed in the above figure.
The air inlet used for connecting air supply, has
standard 1/4" NPT American Thread. Line pressure
should be increased to compensate for unusually long
air hoses (over 25 feet). Minimum hose diameter
should be 3/8" I.D. and fittings should have the same
inside dimensions and be tightly secured.
LUBRICATION
Lubricate the air motor daily with motor oil. If no air
line oiler is used, run a teaspoon of oil through the
tool. The oil can be squirted into the tool air inlet or
into the hose at the nearest connection to the air
supply, then run the tool. The amount of oil to be used
is 1 ounce. Overfilling will cause a reduction in the
power of the tool.
OPERATION
Punch Replacement:
Disconnect air supply from tool.
1. Remove set screw (#40) from cutting head.
2. Remove cutter die (#39).
3. Remove nibbler housing nut (#38) and cutter
nut (#37).
4. Replace punch.
5. Reverse above procedure, check screws for
tightness before operating tool.
Die Adjustment
Disconnect air supply from tool.
Loosen set screw (#40). Turn cutter die to desired
position. Tighten set screw.
Warning
• Cutting with this tool will create sharp edges.
Wear gloves to protect hands.
• Avoid direct contact with work surface during
and after work.
• Cutting edges can become hot during use.
Do not touch.
• Never force the tool to cut faster or through
heavier gauge material than rated capacity
WARRANTY
Cornwell warrants its air tools for a period of 1 year to the consumer. We will repair any air tool covered under this
warranty which proves to be defective in material or workmanship during the warranty period. In order to have your
tool repaired, return the tool to any Cornwell Authorized Warranty Center, freight prepaid. Please include a copy of your
proof of purchase and a brief description of the problem. The tool will be inspected and if any part or parts are found
to be defective in material or workmanship, they will be repaired free of charge and the repaired tool will be returned
to you freight prepaid.
This warranty gives you specific rights. You may also have other rights which vary from state to state.
The foregoing obligation is Cornwell’s sole liability under this or any implied warranty and under no circumstances shall
Cornwell be liable for any incidental or consequential damages.
Note: Some states do not allow the exclusion or limitation of incidental or consequential damages so the above
limitation or exclusion may not apply to you.

CAT-320AN 4 Rev. 04/01/02
PARTS BREAKDOWN - CAT-320AN
Ref. # Item # DESCRIPTION QTY
1 229B1C Motor Housing 1
*2 Throttle Valve 1
*3 Throttle Valve Seal 1
*4 Throttle Valve Spring Seat 1
*5 Throttle Valve Spring 1
6 229B6 Throttle Valve Plug 1
7 229B7 Throttle Valve Plug Seal 1
8 229B8 Inlet Bushing 1
9 229B9 Throttle Lever 1
10 229B10 Throttle Lever Pin 1
11 229B11 End Plate Cap 1
12 21114 Rear Rotor Bearing 1
13 229B13 Rear End Plate 1
14 229B14 Rotor 1
15 229B15 Vane 4
**16 Cylinder 1
**17 Cylinder Dowel 1
18 229B18 Front End Plate 1
19 21417 Front Rotor Bearing 1
20 229B20 Motor Clamp Washer 1
Ref. # Item# DESCRIPTION QTY
21 229B21 Gear Case 1
22 229B22 Gear Case Nut 1
23 229B25 Spindle Bearing 2
24 229B24 Spindle 1
25 71125 Spindle Planet gear 2
26 71126 Spindle Planet Gear Shaft 2
27 229B27 Eccentric Nut 1
28 229B28 Nibbler Housing 1
***29 Nibbler Crank 1
***30 Crankshaft 1
***31 Crankshaft Pin 1
***32 Crank Bearing 1
33 229B33B Nibbler Housing Cover 1
34 229B34 Housing Cover Screw 3
35 229B35 Crankshaft Bushing 1
36 229B36 Cutter 1
37 229B37 Cutter Locknut 1
38 229B38 Nibbler Housing Nut 1
39 229B39 Cutter Die 1
40 229B40 Cutter Die Set Screw 1
* Available ONLY as 229B2A assembly including ref. no. 2, 3, 4 & 5
** Available ONLY as 229B16A assembly including ref. no. 16 & 17
*** Available ONLY as 229B29A assembly including ref. no. 29, 30, 31 & 32