7-1/4” CIRCULAR SAW WORM GEAR DRIVE Model 90186 ASSEMBLY and Operating Instructions Visit our website at: http://www.harborfreight.com Read this material before using this product. Failure to do so can result in serious injury. Save this manual. Copyright© 2008 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools.
PRODUCT SPECIFICATIONS ITEM DESCRIPTION Electrical 110V / 60 Hz / 13 Amp / 4500 RPM Single Phase / Easy Access Carbon Brushes (Qty. 2) Saw Blade Capacity 7-1/4” Diameter Blade Arbor Hole Diamond Depth of Cut 2-1/4” Additional Features Two Handle Design / Spring Loaded Blade Guard / Safety Switch / 5/8” Arbor Adapter Overall Dimensions 18-1/2”L x 7-1/8”W (at its widest point) Shoe Plate Size 11-13/16”L x 5-3/16”W Weight 15.
. Keep bystanders, children, and visitors away while operating a power tool. Distractions can cause you to lose control. Protect others in the work area from debris such as chips and sparks. Provide barriers or shields as needed. ELECTRICAL SAFETY 4. Grounded tools must be plugged into an outlet properly installed and grounded in accordance with all codes and ordinances. Never remove the grounding prong or modify the plug in any way. Do not use any adapter plugs.
11. Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts. 12. Avoid accidental starting. Be sure the Power Switch is off before plugging in. Carrying power tools with your finger on the Power Switch, or plugging in power tools with the Power Switch on, invites accidents. 13. Remove adjusting keys or wrenches before turning the power tool on.
22. Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the tool’s operation. If damaged, have the tool serviced before using. Many accidents are caused by poorly maintained tools. 23. Use only accessories that are recommended by the manufacturer for your model. Accessories that may be suitable for one tool may become hazardous when used on another tool. SERVICE 24. Tool service must be performed only by qualified repair personnel.
7. When using the Circular Saw, always maintain a firm grip on the tool with both hands and keep hands and fingers away from the cutting area and Saw Blade. 8. Keep your body positioned to either side of the Saw Blade, but not in line with the Saw Blade. 9. Avoid “kickback” forces. Kickback is a sudden reaction to a pinched, bound, or misaligned Saw Blade causing an uncontrolled Circular Saw to lift up and out of the workpiece toward the operator.
18. Always turn off the Circular Saw and unplug it from its electrical outlet before changing accessories or performing any inspection, maintenance, or cleaning procedures. 19. The warnings and cautions discussed in this manual cannot cover all possible conditions and situations that may occur. It must be under stood by the operator that common sense and caution are factors which cannot be built into this product, but must be supplied the the operator. 20.
2. The grounding prong in the plug is connected through the green wire inside the cord to the grounding system in the tool. The green wire in the cord must be the only wire connected to the tool’s grounding system and must never be attached to an electrically “live” terminal. (See Figure A.) 3. Your tool must be plugged into an appropriate outlet, properly installed and grounded in accordance with all codes and ordinances.
EXTENSION CORDS 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. Using extension cords with inadequately sized wire causes a serious drop in voltage, resulting in loss of power and possible tool damage. (See Figure C, next page.) 3. The smaller the gauge number of the wire, the greater the capacity of the cord.
SYMBOLOGY Double Insulated Canadian Standards Association Underwriters Laboratories, Inc. V~ A Volts Alternating Current Amperes No Load Revolutions no xxxx/min. per Minute (RPM) UNPACKING When unpacking, check to make sure all the parts shown on the Parts List on page 17 and 18 are included. If any parts are missing or broken, please call Harbor Freight Tools at the number shown on the cover of this manual as soon as possible.
3. Once the new Saw Blade (part #3) is installed onto the Shaft (part #15) place the Outer Blade Press (part #2) back onto the Shaft and secure the Saw Blade in place by tightening (counterclockwise) the Bolt (part #1) into the Shaft. (See Figure C.) LOCK BUTTON FIGURE D 7-1/4” DIA.
OPERATING INSTRUCTIONS Note: Add gear oil before first use. Check gear oil level before every use. Recommended Oil Harbor Freight Tools SKU 66582. In case of unavailability, you can use the following: Shell Valvata J680®, Mobilgear SHC680®, Shell Tivela Oil s680®. WARNING Always make sure the Power Cord (part #65) of the Circular Saw is un plugged from its electrical outlet prior to assembly, adding any accessories, or making any adjustments to the tool.
The Power Switch: 1. To start the Circular Saw, depress the Safety Switch with your thumb, and then the Power Switch (part #67). To stop the tool, release pressure on the Power Switch. (See Figure I.) 2. WARNING! Prior to using the Circular Saw (each time), make sure the Switch Lock mechanism is working properly. Always release the Switch Lock mecha- nism before disconnecting the Saw from its electrical outlet.
4. Make sure the workpiece is supported at all times. Whenever possible, secure the workpiece in a vise or with clamps (not included). If necessary, use a roller stand (not included) with larger workpieces. 5. Plug the Power Cord (part #65) into the nearest 110 volt, grounded, electrical outlet. 6. Firmly grip the Handle (parts #60, #68) with one hand and the Auxiliary Handle (part #46) with the other hand.
3. TOOL LUBRICATION: Always check the oil level of the Circular Saw before each use. To check and add oil, make sure the Circular Saw is sitting on a flat, level surface. Remove the Oil Plug located at the front of the Circular Saw. The oil level should never be below the bottom threads of the Oil Plug Hole. When adding oil, fill with a 5 to 10 Weight Worm Drive Lubricant until the oil begins to run out of the Oil Plug Hole. Then, replace the Oil Plug.
5. TO CLEAN: The ventilation openings should be kept clean and free of dirt and debris. The most effective way to clean the ventilation openings is with com- pressed air. The outer body may be cleaned with a clean cloth and a mild deter- gent. Do not use solvents. Do not immerse the Circular Saw in liquid. PLEASE READ THE FOLLOWING CAREFULLY THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY.
PARTS LIST Part# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Description Bolt M8x20 Outer blade press Saw blade φ185 Inner blade press Check ring Lower guard Spring Screw M5x18 Taper washer Bearing cap Bearing 60203 Oil seal φ35xφ22x7 Bearing set Sheet oil seal Shaft Woodruff key Worm gear Lock piece Bearing 60102 Spring washer φ32 Upper guard Screw M4x14 Spring washer Oil seal cover Special oil seal Taper cap Screw M5x14 Stopper Screw M5x5
Part# 81 82 83 84 85 86 87 88 89 90 91 Description Special nut Check ring Foot Special bolt Moving guard lever Wrench Rip fence Screw M4x6 Pointer Screw M5x12 Angle adjustment scale Qty 2 2 1 1 1 1 1 2 1 1 1 LIMITED 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.
DIAGRAM SKU 90186 PAGE 19