Central Pneumatic Professional 93900 Assembly And Operating Instructions Manual

Brand: Central Pneumatic Professional

Model: 93900

Category: Power tools

Type: Assembly And Operating Instructions Manual

2” SPOT WELD AIR DRILL2” SPOT WELD AIR DRILL

2” SPOT WELD AIR DRILL

ASSEMBLY AND OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http://www.harborfreight.com

manual or any artwork contained herein may be reproduced in any shape or form

without the express written consent of Harbor Freight Tools.

For technical questions and replacement parts, please call 1-800-444-3353

93900

Due to continuing improvements, actual product may

differ slightly from the product described herein.

SKU 93900 For technical questions, please call 1-800-444-3353. Page 2

Specifications

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Save this Manual

You will need the manual for the safety warnings and precautions, assembly instruc-

tions, operating and maintenance procedures, parts list and diagram. Keep your

invoice with this manual. Write the invoice number on the inside of the front cover.

Keep the manual and invoice in a safe and dry place for future reference.

Safety Warnings and Precautions

WARNING: When using tool, basic safety precautions should always be followed

to reduce the risk of personal injury and damage to equipment.

Read all instructions before using this tool!

1. Disconnect air before servicing. Do not attempt to disassemble, or service

tool with air hose attached.

2. Use only specified operating air pressure. Never operate tool above the

specified operating air pressure range.

3. Compressed air only. Use clean, dry regulated compressed air between 70

and 100 PSI. Never use oxygen, carbon dioxide, combustible gases, or any

other bottled gas as a power source for this tool.

4. Avoid possible kickback injury. Hold the tool with both hands during operation

so that your head and body are not injured by possible kickback of the tool.

5. Use care when transporting tool. Disconnect tool from air supply when moving

tool in the workplace. Carry tool only by the handle without drawing the trigger.

6. Keep work area clean. Cluttered areas invite injuries.

7. Observe work area conditions. Do not use machines or power tools in damp

or wet locations. Don’t expose to rain. Keep work area well lighted.

8. Keep children away. Children must never be allowed in the work area. Do not

let them handle machines, tools, or extension cords.

9. Store idle equipment. When not in use, tools must be stored in a dry location

to inhibit rust. Always lock up tools and keep out of reach of children.

SKU 93900 For technical questions, please call 1-800-444-3353. Page 3

10. Do not force tool. It will do the job better and more safely at the rate for which

it was intended. Do not use inappropriate attachments in an attempt to exceed

the tool capacity.

11. Use the right tool for the job. Do not attempt to force a small tool or attachment

to do the work of a larger industrial tool. There are certain applications for which

this tool was designed. Do not modify this tool and do not use this tool for a

purpose for which it was not intended.

12. Dress properly. Do not wear loose clothing or jewelry as they can be caught in

moving parts. Protective, electrically nonconductive clothes and nonskid footwear

are recommended when working. Wear restrictive hair covering to contain long

hair.

13. Use eye and ear protection. Always wear ANSI-approved impact safety goggles.

Wear a NIOSH-approved dust mask or respirator when working around metal,

wood, and chemical dusts and mists. Wear ear plugs.

14. Do not overreach. Keep proper footing and balance at all times. Do not reach

over or across running machines.

15. Maintain tools with care. Keep tools sharp and clean for better and safer

performance. Follow instructions for lubricating and changing accessories. Inspect

tool periodically and, if damaged, have them repaired by an authorized technician.

The handles must be kept clean, dry, and free from oil and grease at all times.

16. Remove adjusting keys and wrenches. Check that keys and adjusting

wrenches are removed from the tool before operating.

17. Stay alert. Watch what you are doing, use common sense. Do not operate any

tool when you are tired.

18. Replacement parts and accessories. When servicing, use only identical

replacement parts. Use of any other parts will void the warranty. Only use

accessories intended for use with this tool. Approved accessories are available

from Harbor Freight Tools.

19. Maintenance. For your safety, service and maintenance should be performed

regularly by a qualified technician.

20. Check for damaged parts. Before using any tool, any part that appears damaged

should be carefully checked to determine that it will operate properly and perform

its intended function. Check for alignment and binding of moving parts; any

broken parts or mounting fixtures; and any other condition that may affect proper

operation. Any part that is damaged should be properly repaired or replaced by

a qualified technician. Do not use the tool if any switch does not turn On and Off

properly.

21. Do not operate tool if under the influence of alcohol or drugs. Read warning

labels on prescriptions to determine if your judgment or reflexes are impaired

while taking drugs. If there is any doubt, do not operate the tool.

SKU 93900 For technical questions, please call 1-800-444-3353. Page 4

22. Some dust created by power/hand sanding, sawing, grinding, drilling, and other

construction activities, contain chemicals known [to the State of California] to

cause cancer, birth defects or other reproductive harm. Some examples of

these chemicals are:

A) Lead from lead-based paints,

B) Crystalline silica from bricks and cement or other masonry products,

C) 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. (California Health &

Safety Code § 25249.5,

et seq.

)

Warning: The warnings, cautions, and instructions discussed in this instruction

manual cannot cover all possible conditions and situations that may occur. It

must be understood by the operator that common sense and caution are factors

which cannot be built into this product, but must be supplied by the operator.

Unpacking

When unpacking, check to make sure that all the parts are included. Refer to the

Parts List and Parts Diagram at the end of this manual. If any parts are missing or

broken, please call Harbor Freight Tools at the number on the cover of this manual as

soon as possible.

Assembly

Air Inlet (56)

Air Connection

1. Attach an air hose (not supplied) to the Air

Inlet (56) fitting.

2. Optionally, for easy connection or removal,

attach an Air Quick-coupler (not supplied)

to the hose and Air Inlet (56) fitting.

3. Retighten all couplings and fittings. See photos on the next page.

Oiler and Filter Connection

Dirt, water, and the lack of pneumatic tool oil are major causes for tool wear. Install

an optional oiler-filter, as illustrated below for better performance.

1. Connect the air tool, air hoses, filter, and oiler to the Compressor Air Outlet as

illustrated below.

The filter and oiler (not supplied) are recommended but not mandatory for operation.

SKU 93900 For technical questions, please call 1-800-444-3353. Page 5

If the filter and oiler are not used, connect the air hose directly to the 1/4 inch,

18 NPT connector located at the Air Inlet (13) fitting. Also, a few drops of

pneumatic tool oil must be added through the air line before each use.

Note: Use pipe thread seal tape on all threaded connections.

Secure Drill Bit

Before each use, insert the Hex Wrench (57) into the Set Screw on the Supporter

(45) and tighten to the flat surface on the shank of the Drill Bit (46).

Operation

Controls and Adjustments

Arm (50)

Drill Bit (46)

Supporter (45)

Adjustment

Wheel (29)

Trigger (12)

Air Inlet (56)

Muffler (54)

Retaining Ring (48)

Lock Nut (47)

Drilling a Spot Weld

1. Push in on the Supporter (45) and verify that it lines up with the top of the Drill

Bit (46).

2. Measure the height of the spot weld to be drilled. Turn the Adjustment Wheel (29)

so that the distance between the top of the Supporter (45) and the top of the Drill

Bit (46) equals the height of the spot weld.

3. Connect the compressor air hose (minimum 3/8” I.D.) to the Air Inlet (56) on the

handle of the Housing (1).

4. Turn the compressor (not supplied) on and set the air compressor pressure

regulator to 90 PSI.

SKU 93900 For technical questions, please call 1-800-444-3353. Page 6

If any air is leaking, turn off the compressor, disconnect the air hose, and repair

the leak. Repeat steps 3 and 4.

5. Push in on the Supporter (45) and place the Drill Bit (46) over the spot weld to

be drilled and release the Supporter; then release Supporter (45).

The spot weld must be within two inches from the edge of the metal where the

spot weld is located. The two inch Arm (50) goes under the metal with the spot

weld.

6. Grip the Air Drill firmly with both hands and press down on the Trigger (12).

Press the Trigger to the first click to operate the drill at low speed so you can

position the bit in place. Press it all the way in to drill.

Caution: If the Air Drill will not turn, or if it stalls while drilling, do not raise the

outlet pressure of the air compressor. Do not continue with attempts to drill

until the problem is resolved.

7. Press down with steady, even pressure. Let the Drill Bit do the drilling. While

drilling, turn the adjustment wheel to draw the Arm (50) and Bit (46) together.

8. When the Supporter (45) will not allow the Drill Bit to continue further, the drilling

is complete.

If part of the spot weld remains, turn the Adjustment Wheel (29) to allow the Drill

Bit to drill deeper, and repeat steps 5 to 8.

9. When finished drilling, turn the compressor off and remove the hose connection

to the Air Drill.

10. Press and hold in the Trigger (12) to release any air remaining in the Air Drill.

Maintenance

1. After each use, wipe the Air Drill with a clean cloth to remove any dirt and

grease buildup.

2. To maintain tool life, always lubricate the air line by adding a few drops of

pneumatic tool oil to the air line before each use. Or, install the automatic

oiler-filter system as illustrated on page 5.

3. Before each use, drain water out of the air compressor tank and condensation

from the air lines. Refer to the Air Compressor Operator’s Manual.

Manual Tool Lubrication

1. Disconnect the Air Drill from the air supply and turn it so the Air Inlet fitting is

facing upward.

2. Hold the Trigger (12) in and place one teaspoon of pneumatic tool oil into the air

inlet (use SAE #10 weight oil if air tool oil is not available). Holding the Trigger

lever in helps circulate the oil in the air motor.

3. Connect the Air Drill to the air supply and cover the Muffler Cover (11) with a

towel. Run for a few seconds. Excess oil with be blown out the Muffler (54).

SKU 93900 For technical questions, please call 1-800-444-3353. Page 7

Replacing the Drill Bit

1. Disconnect the air line from the Air Drill.

2. Press and hold the Trigger (12) to release any remaining air.

3. Unscrew the Lock Nut (47) by turning it counterclockwise and slide it up and

over the Arm (50).

4. Grab the Arm (50) and turn it side to side while pulling it up and off the Housing

(1).

5. Using the Hex Wrench (57), loosen the Set Screw in the Supporter (45), then pull

out the Drill Bit (46).

6. Replace the Drill Bit and retighten the Set Screw on the flat surface of the Drill

Bit.

7. Replace the Arm (50).

8. Replace the Lock Nut (47) by turning it clockwise over the Housing (1). Securely

tighten Lock Nut.

Parts List

Item Description Qty Item Description Qty

1 Housing 1 31. Retaining Ring (S22) 1

1. A

Ball (∅ 6.35mm)

1 32. Ball Bearing (R8) 1

Pin (∅ 3x27.8)

1 33. Gear Cage 2

5. O-ring (3.9x2.25x2) 1 34. Gear 2

O-ring (∅ 3.5x1.5)

1 35.

Pin (∅ 3x17.8)

8. Valve Stem 1 36. Washer 1

9. O-ring (P14) 3 37. Ball Bearing (R6zz) 1

10. Valve Bushing 1 38. Internal Gear 1

11. Spring 1 39. Bit Holder 1

12. Trigger 1 40. Set Screw (M5x5) 1

13. Set Screw (M4x4) 1 41. Set Screw (M4x6) 1

14. Ball Bearing (696zz) 1 42. Housing, Supporting 1

15. Set Screw (M3x12) 1 43. Spring 1

16. Rear End Plate 1 44. Retainer 1

17.

O-ring (∅ 33.05x1.78)

1 45. Supporter 1

18. Rotor Blades 5 46.

Drill Bit (

∅

19. Rotor 1 47. Lock Nut 1

20. Cylinder 1 48. Retaining Ring 1

21.

Ball (∅ 5)

1 50. Arm, 2 inch 1

22. Ball Bearing (608zz) 1 51. Screw (M4x8) 1

23. Spring 1 52. O-ring (P18) 1

24. Clamp Nut 1 53. Muffler Nut 1

25. Gear Case 1 54. Muffler 1

26. Gear Housing 1 55. Muffler Retainer 1

27. Spring 2 56. Air Inlet 1

28.

Ball (∅ 4)

2 57. Hex Wrench 1

29. Adjustment Wheel 1 58. O-ring 2

30. Wave Washer (6200) 2

NOTE: Some parts are listed and shown for illustration purposes only and

are not available individually as replacement parts.

SKU 93900 For technical questions, please call 1-800-444-3353. Page 8

3491 Mission Oaks Blvd. • P.O. Box 6009 • Camarillo, CA 93011 • (800) 444-3353

LIMITED

2 YEAR WARRANTY

Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and

durability standards, and warrants to the original purchaser that this product is free from defects in

materials and workmanship for the period of two years from the date of purchase. This warranty

does not apply to damage due directly or indirectly to misuse, abuse, negligence or accidentals;

repairs or alterations outside our facilities; or to lack of maintenance. We shall in no event be liable

for death, injuries to persons or property, or for incidental, contingent, special or consequential

damages arising from the use of our product. Some states do not allow the exclusion or limitation

of incidental or consequential damages, so the above limitation of exclusion may not apply to you.

To take advantage of this warranty, the product or part must be returned to us with transportation

charges prepaid. Proof of purchase date and an explanation of the complaint must accompany the

merchandise. If our inspection verifies the defect, we will either repair or replace the product at our

election or we may elect to refund the purchase price if we cannot readily and quickly provide you

with a replacement. We will return repaired products at our expense, but if we determine there is no

defect, or that the defect resulted from causes not within the scope of our warranty, then you must

bear the cost of returning the product.

This warranty gives you specific legal rights and you may also have other rights which vary from

state to state.

Assembly Drawing

PLEASE READ THE FOLLOWING CAREFULLY

THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN

THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DIS-

TRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER

THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR

SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFAC-

TURER AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS RE-

PLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS

AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF

HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO,

OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.

Central Pneumatic Professional 93900 Assembly And Operating Instructions Manual

Brand: Central Pneumatic Professional

Model: 93900

Category: Power tools

Type: Assembly And Operating Instructions Manual

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Central Pneumatic Professional 93900 Assembly And Operating Instructions Manual

Central Pneumatic Professional 93900 Assembly And Operating Instructions Manual

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