4 IN. Angle Grinder Item 91222 Read this material before using this product. Failure to do so can result in serious injury. SAVE THIS MANUAL. When unpacking, make sure that the product is intact and undamaged. If any parts are missing or broken, please call 1-800-444-3353 as soon as possible. Visit our website at: http://www.harborfreight.com Email our technical support at: tech@harborfreight.com Copyright© 2004 by Harbor Freight Tools®. All rights reserved.
Save This Manual Keep this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference.
b. Use safety equipment. Always wear eye protection. Safety equipment such as dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries. c. Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents. d.
7. Do not use a damaged accessory. Before each use inspect the accessory such as abrasive wheels for chips and cracks, backing pad for cracks, tear or excess wear, wire brush for loose or cracked wires. If power tool or accessory is dropped, inspect for damage or install an undamaged accessory. After inspecting and installing an accessory, position yourself and bystanders away from the plane of the rotating accessory and run the power tool at maximum no-load speed for one minute.
25. The warnings, precautions, 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. Kickback and Related Warnings Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush or any other accessory.
1. Anyone using vibrating tools regularly or for an extended period should first be examined by a doctor and then have regular medical checkups to ensure medical problems are not being caused or worsened from use. Pregnant women or people who have impaired blood circulation to the hand, past hand injuries, nervous system disorders, diabetes, or Raynaud’s Disease should not use this tool.
2. Double insulated tools may be used in either of the 120 volt outlets shown in the preceding illustration. (See Outlets for 2-Prong Plug.) Symbology Double Insulated Extension Cords Canadian Standards Association 1. Grounded tools require a three wire extension cord. Double Insulated tools can use either a two or three wire extension cord. 2. As the distance from the supply outlet increases, you must use a heavier gauge extension cord.
Installing the Side Handle Specifications Electrical Input 120 V~ / 60 Hz / 4.5 A Motor No Load Speed 11,000 RPM 4″ (100 mm) Max. Diameter Accessory Size accepts either 5/8″ or 7/8″ Arbor Hole 5/8″ with 7/8″ Arbor Adapter Arbor Diameter Spindle Thread TO PREVENT SERIOUS INJURY: Do not operate this tool with one hand only or without the Side Handle properly installed. 6. The Side Handle may be installed in one of two positions, on either side of the Gear Housing. 7.
3. Using the WRENCH (28) (refer to Figure 2), loosen the WHEEL NUT (1) by turning it counterclockwise. 45° Hang Wheel from Pin Spindle (5) V E R T I C A L Tap Wheel Here Reversible Inner Flange (3) Wheel Nut (1) Grinding Wheel (2) Wrench (28) Figure 2 — Installing Wheels 4. The Reversible Inner Flange (3) can be set to provide support for either a 5/8″ or 7/8″ grinding wheel arbor.
Installing a Threaded Accessory TO PREVENT INJURY: Wear heavy‑duty work gloves when handling wire wheels and brushes. These accessories are sharp and can cause injury. 2. Slide the SLIDE SWITCH (19) forward to start the tool. Slide Switch (19) 1. The accessory MUST be: • rated to at least 11,000 RPM. • no larger than 4″ in diameter. • fitted with a threaded opening of 5/8″ x 11 TPI. • undamaged.
2. Replace the CARBON BRUSH with identical replacement parts from Harbor Freight Tools. Maintenance And Servicing Procedures not specifically explained in this manual must be performed only by a qualified technician. TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION: Turn the Power Switch of the tool off and unplug the tool from its electrical outlet before performing any inspection, maintenance, or cleaning procedures. TO PREVENT SERIOUS INJURY FROM TOOL FAILURE: Do not use damaged equipment.
Troubleshooting Problem Tool will not start. Possible Causes 1. Cord not connected. 2. No power at outlet. 3. Tool’s thermal reset breaker tripped (if equipped). 4. Internal damage or wear. (Carbon brushes or switch, for example.) Tool operates slowly. 1. Excess pressure applied to workpiece. 2. Power being reduced by long or small diameter extension cord. Performance decreases over time. Excessive noise or rattling. Overheating. Tool does not grind, sand or brush effectively.
Parts List and Assembly Diagram Part 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Description Qty. Wheel Nut Grinding Wheel Reversible Inner Flange Wheel Guard Spindle Packing Gland Ball Bearing Gear Needle Roller Bearing Gear Cover Spring Lock Pin Pinion Ball Bearing Armature 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Part 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Description Ball Bearing Stator Housing Slide Switch Slide Bar Brush Holder Carbon Brush Brush Cap Cord Cover Switch Switch Holder Wrench Side Handle Qty.
90 Day 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 90 days from the date of purchase.
3491 Mission Oaks Blvd.
