DELTA 23-700 Universal Wet-Dry Grinder Owner’s Manual

Universal Wet/Dry Grinder
(Model 23-700) INSTRUCTION MANUAL

SAFETY RULES

Woodworking can be dangerous if safe and proper operating procedures are not followed. As with all machinery, there are certain hazards involved with the operation of the product. Using the machine with respect and caution will considerably lessen the possibility of personal injury. However, if normal safety precautions are overlooked or ignored, personal injury to the operator may result. Safety equipment such as guards, push sticks, hold-downs, featherboards, goggles, dust masks and hearing protection can reduce your potential for injury. But even the best guard won’t make up for poor judgment, carelessness or inattention. Always use common sense and exercise caution in the workshop. If a procedure feels dangerous, don’t try it. Figure out an alternative procedure that feels safer. REMEMBER: Your personal safety is your responsibility.
This machine was designed for certain applications only. Delta Machinery strongly recommends that this machine not be modified and/or used for any application other than that for which it was designed. If you have any questions relative to a particular application, DO NOT use the machine until you have first contacted Delta to determine if it can or should be performed on the product.
DELTA INTERNATIONAL MACHINERY CORP.
MANAGER OF TECHNICAL SERVICES 246 ALPHA DRIVE
PITTSBURGH, PENNSYLVANIA 15238
(IN CANADA: 644 IMPERIAL ROAD, GUELPH, ONTARIO N1H 6M7)

WARNING: FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY

1. FOR YOUR OWN SAFETY, READ INSTRUCTION MANUAL BEFORE OPERATING THE TOOL. Learn the tool’s application and limitations as well as the specific hazards peculiar to it.
2. KEEP GUARDS IN PLACE and in working order.
3. ALWAYS WEAR EYE PROTECTION.
4. GROUND ALL TOOLS. If tool is equipped with three- prong plug, it should be plugged into a three-hole electrical receptacle. If an adapter is used to accommodate a twoprong receptacle, the adapter lug must be attached to a known ground. Never remove the third prong.
5. REMOVE ADJUSTING KEYS AND WRENCHES.Form habit of checking to see that keys and adjusting wrenches are removed from tool before turning it “on.”
6. KEEP WORK AREA CLEAN. Cluttered areas and benches invite accidents.
7. DON’T USE IN DANGEROUS ENVIRONMENT. Don’t use power tools in damp or wet locations, or expose them to rain. Keep work area well-lighted.
8. KEEP CHILDREN AND VISITORS AWAY. All children and visitors should be kept a safe distance from work area.
9. MAKE WORKSHOP CHILDPROOF – with padlocks, master switches, or by removing starter keys.
10. DON’T FORCE TOOL. It will do the job better and be safer at the rate for which it was designed.
11. USE RIGHT TOOL. Don’t force tool or attachment to do a job for which it was not designed.
12. WEAR PROPER APPAREL. No loose clothing, gloves, neckties, rings, bracelets, or other jewelry to get caught in moving parts. Nonslip footwear is recommended. Wear protective hair covering to contain long hair.
13. ALWAYS USE SAFETY GLASSES. Wear safety glasses. Everyday eyeglasses only have impact resistant lenses; they are not safety glasses. Also use face or dust mask if cutting operation is dusty.
14. SECURE WORK. Use clamps or a vise to hold work when practical. It’s safer than using your hand and frees both hands to operate tool.
15. DON’T OVERREACH. Keep proper footing and balance at all times.
16. MAINTAIN TOOLS IN TOP CONDITION. Keep tools sharp and clean for best and safest performance. Follow instructions for lubricating and changing accessories.
17. DISCONNECT TOOLS before servicing and when changing accessories such as blades, bits, cutters, etc.
18. USE RECOMMENDED ACCESSORIES. The use of accessories and attachments not recommended by Delta may cause hazards or risk of injury to persons.
19. REDUCE THE RISK OF UNINTENTIONAL STARTING. Make sure switch is in “OFF” position before plugging in power cord.
20. NEVER STAND ON TOOL. Serious injury could occur if the tool is tipped or if the cutting tool is accidentally contacted.
21. CHECK DAMAGED PARTS. Before further use of the tool, a guard or other part that is damaged should be carefully checked to ensure that it will operate properly and perform its intended function – check for alignment of moving parts, binding of moving parts, breakage of parts, mounting, and any other conditions that may affect its operation. A guard or other part that is damaged should be properly repaired or replaced.
22. DIRECTION OF FEED. Feed work into a blade or cutter against the direction of rotation of the blade or cutter only.
23. NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF. Don’t leave tool until it comes to a complete stop.
24. DRUGS, ALCOHOL, MEDICATION. Do not operate tool while under the influence of drugs, alcohol or any medication.
25. MAKE SURE TOOL IS DISCONNECTED FROM POWER SUPPLY while motor is being mounted, connected or re- connected.
26. WARNING: The dust generated by certain woods and wood products can be injurious to your health. Always operate machinery in well ventilated areas and provide for proper dust removal. Use wood dust collection systems whenever possible.

ADDITIONAL SAFETY RULES FOR WET/DRY GRINDERS

1. IF YOU ARE NOT thoroughly familiar with the operation of the Wet/Dry Grinder, obtain advice from your supervisor, instructor or other qualified person.
2. MAKE SURE the wheel guards and eye shields are in place and are properly adjusted and tightened.
3. BE SURE blotter and wheel flanges are used to mount the grinding wheels onto the shaft of the grinder.
4. ADJUST distance between wheels and tool rests to maintain 1/8″ or less separation as the diameter of the wheels decrease with use. Securely tighten tool rests so they cannot shift position while in use.
5. INSPECT THE WHEELS before turning on the power. REPLACE cracked or chipped wheels immediately.
6. STAND to one side of the wheel when turning on the power.
7. DRESS the wheel on the face only. Dressing on the side of the wheel would cause it to become too thin for safe use.
8. WHEN GRINDING use the face of the wheel only.
9. DO NOT use a wheel that vibrates. Dress wheel, replace the wheel, or replace the bearings of the shaft if these are worn. Grinding creates heat; don’t touch ground portion of workpiece until you are sure workpiece has cooled.
10. HOLD work firmly against tool rests.
11. KEEP hands away from grinding wheels.
12. USE grinding wheel suitable for speed of grinder.
13. DISCONNECT machine from power source when making repairs or adjustments.
14. WARNING: The use of accessories or attachments not recommended by Delta may result in risk of injury.
15. ADDITIONAL information regarding the safe and proper operation of this product is available from the National Safety Council, 1121 Spring Lake Drive, Itasca, IL 60143-3201 in the Accident Prevention Manual for Industrial Operations and also in the Safety Data Sheets provided by the NSC. Please also refer to the American National Standards Institute ANSI 01.1 Safety Requirements for Woodworking Machinery and the U.S. Department of Labor OSHA 1910.213 Regulations.
16. SAVE THESE INSTRUCTIONS. Refer to them often and use them to instruct others.

ASSEMBLING AND ADJUSTING EYE SHIELD

1. Fasten the eye shield (A) Fig. 2, to mounting bracket (B) using the two screws (C) and nuts (D).
2. Assemble eye shield and mounting bracket assembly (E) Fig. 3, to side of grinding wheel guard (F) using lock knob screw and washer (G) Figs. 2 and 3.
3. The eye shield (A) Fig. 4, is fully adjustable so it can be put in any desired position by loosening lock knob (H) and moving the shield (A).

ASSEMBLING AND ADJUSTING THE TOOL RESTS

1. Assemble the tool rest (A) Fig. 5, to the wheel guard using the lock knob screw (B), nut and washer.
2. The tool rest (A) Fig. 6, is adjustable so it can be positioned as close to the grinding wheel as possible giving maximum support to the piece that is being ground, by loosening lock knob (B), moving tool rest (A) to the desired position and tightening lock knob (B). As the grinding wheel wears down to a smaller diameter, readjust the tool rest closer to the wheel. The tool rest (A) should be adjusted so it is set a little below the center of the wheel. This is the most practical and safest position for general work. Free hand grinding without the use of the tool rest should always be done on the lower quarter of the wheel.
3. The tool rest for the 10 grinding wheel can be assembled to the right hand side of the machine as shown in Fig. 7, or can be assembled to the left hand side of the machine as shown in Fig. 8. Assemble the tool rest (C) Figs. 7 and 8 to the machine as desired, using two 1 long hex head screws and flat washers (D), one of which is shown.
   NOTE: When assembling the tool rest on the left side of the machine, the grinding action will be on the upward swing. The tool rest (C) Figs. 7 and 8, is adjustable so it can be positioned close to the grinding wheel and at any angle to the wheel by loosening two locking handles (E), adjusting the tool rest (C), and tightening the two locking handles (E). The locking handles (E) are spring-loaded and can be repositioned by pulling outward on each handle and repositioning it on the serrated nut located underneath the handle.

ADJUSTING SPARK DEFLECTOR
As the five inch grinding wheel (H) Fig. 9, wears down due to extended use, the spark deflector (J) should be adjusted downward with it, so it is always set close to the grinding wheel for maximum operator safety. To adjust the spark deflector, loosen screw (K) Fig. 9, position the spark deflector (J) close to the surface of the grinding wheel, and retighten screw (K).

SLIDING ANGLE JIG
A sliding angle jig (A) Fig. 10, is supplied for use on the tool rest for the 10 grinding wheel to facilitate accurate grinding of compound angles up to 45°, right or left.

FASTENING WET/DRY GRINDER TO SUPPORTING SURFACE
The Wet/Dry Grinder should always be secured to a supporting surface using the four mounting holes, three of which are shown at (A) Fig. 11. 

CONNECTING WET/DRY GRINDER TO POWER SOURCE

A separate electrical circuit should be used for your tools. This circuit should not be less than #12 wire and should be protected with a 20 Amp time lag fuse. If an extension cord is used, use only 3-wire extension cords which have 3-prong grounding type plugs and 3-pole receptacles which accept the tool’s plug. For distances up to 100 feet, use #12 wire. For distances up to 150 feet, use #10 wire. Have a certified electrician replace or repair damaged or worn cord immediately. Before connecting the motor to the power line, make sure the switch is in the “OFF” position and be sure that the electric current is of the same characteristics as stamped on motor nameplate. All line connections should make good contact. Running on low voltage will injure the motor.

GROUNDING INSTRUCTIONS
CAUTION: This tool must be grounded while in use to protect the operator from electric shock. The motor is shipped wired for 120 Volt, Single Phase and is equipped with an approved 3-conductor cord and 3-prong grounding type plug to fit the proper grounding type receptacle, as shown in Fig. 12. The green conductor in the cord is the grounding wire.
CAUTION: Never connect the green wire to a live terminal.An adapter, shown in Fig. 13, is available for connecting 3-prong grounding type plugs to 2-prong receptacles.
THIS ADAPTER IS NOT APPLICABLE IN CANADA.
The green-colored rigid ear, lug, etc., extending from the adapter is the grounding means and must be connected to a permanent ground, such as to properly grounded outlet box, as shown in Fig. 13. CAUTION: IN ALL CASES, MAKE SURE THE RECEPTACLE IN QUESTION IS PROPERLY GROUNDED.
IF YOU ARE NOT SURE, HAVE A CERTIFIED ELECTRICIAN CHECK THE RECEPTACLE.

MOTOR AND SPEEDS
A 1/5 H.P. motor is supplied with the Wet/Dry Grinder. The 5 grinding wheel operates at 3450 RPM and replacement wheels should be rated for 3450 RPM or higher. The 10 grinding wheel operates at the slow speed of 70 RPM.

SWITCH
The switch (A) Fig. 14, is located under the grinder motor. When the switch is pushed to the “ON” position, both grinding wheels will turn. To stop the grinding wheels, push the switch to the “OFF” position. IMPORTANT: We suggest when the grinder is not in use, the switch be locked in the “OFF” position, using a padlock thru the two holes (B) in the switch plate.

WATER LEVEL
When using the 10 grinding wheel, there should always be enough water in the base (A) Fig. 15, of the grinder in order that one inch of the lower portion of the grinding wheel will be submerged in water. As water is absorbed into the grinding wheel, additional water must be added into the base.A drain screw (B) Fig. 16, is provided in the grinder base to remove the water.

GRINDING WHEELS

For best grinding results and to maintain good balance, always keep the wheels properly dressed. Do not force work against a cold wheel but use light pressure until the wheel becomes warm. It is earnestly recommended that only balanced wheels be used. The  use of balanced wheels adds years to the life of the bearings in any grinder, and by eliminating the most common source of vibration, more accurate work is accomplished.
Your dealer can order special wheels, given the size, thickness, arbor diameter and grade, from any reliable grinding wheel company, but be sure that they are balanced for perfect results and rated for the proper speed or higher.

DRESSING A GRINDING WHEEL
When dressing a grinding wheel, use a suitable silicon carbide stick type dresser, as shown in Fig. 17. Bring the dresser forward until it just touches the high point of the face of the wheel and dress the wheel by moving the dresser back and forth. Repeat this  operation until the face of the wheel is clean and the corners are square.

CHANGING GRINDING WHEELS
When changing the Catalog No. 23-702 5 grinding wheel, remove the eye shield, tool rest and side cover. Loosen and remove arbor nut (A) Fig. 18, by turning it counterclockwise when viewed from the wheel end of the motor.
To prevent shaft rotation, hold the grinding wheel by hand, as shown.
IMPORTANT: WHEN INSTALLING THE NEW WHEEL, DO NOT OVERTIGHTEN THE ARBOR NUT (A).

When changing the Catalog No. 23-701 10 grinding wheel, remove the four screws (A) Fig. 19.
Lift the complete motor assembly (A) Fig. 20, off the base casting (B). Remove bearing block (C) from end of shaft.
Hold grinding wheel and turn arbor nut (D) Fig. 21, counterclockwise, when viewed from wheel end of shaft, to loosen and remove nut (D).
IMPORTANT: WHEN INSTALLING THE NEW WHEEL, DO NOT OVERTIGHTEN THE ARBOR NUT (D).

LUBRICATION
Occasionally lubricate the arbor shaft with light machine oil, through the oiler (A) Fig. 22, provided. To lubricate the worm gears (A) and (B) Fig. 23, remove the nameplate (C) and apply grease to the two gears (A) and (B) as shown.

OPERATION

FIVE INCH DRY GRINDING WHEEL
The five inch diameter aluminum oxide grinding wheel operates at 3450 RPM and is used for many grinding operations, such as pointing screwdrivers as shown in Fig. 24. Scissors, putty knives, wood chisels and drill bits such as shown in Fig. 25, can also be sharpened easily on the five inch grinding wheel. Set the tool rest (A) Fig. 25, slightly below the center of the grinding wheel for general work and adjust it so it supports the tool at the proper grinding angle. Make certain all safety precautions are taken before applying power to the machine.

TEN INCH WET GRINDING WHEEL
The ten inch aluminum oxide grinding wheel operates at a slow speed of 70 RPM, which makes it suitable for honing cutting tools such as garden tools, chisels and sharpening axes, as shown in Fig. 26.
During operation, the water level in the reservoir (A)
Fig. 26, should be kept at a one inch depth. This will keep the wheel constantly wet while rotating and keep hardened tools cool without damaging their temper.
The large wheel also is used to remove burrs from tools requiring keen edges.The sliding angle jig is used to sharpen tools with compound cutting angles, as shown in Fig. 27.
Adjust the tool rest so it supports the tool at the exact grinding angle close to the grinding wheel, and observe all safety precautions before applying power to the machine.

Delta Building Trades and Home Shop Machinery
Two Year Limited Warranty

Delta will repair or replace, at its expense and at its option, any Delta machine, machine part, or machine accessory which in normal use has proven to be defective in workmanship or material, provided that the customer returns the product prepaid to a Delta factory service center or authorized service station with proof of purchase of the product within two years and provides Delta with reasonable opportunity to verify the alleged defect by inspection. Delta may require that electric motors be returned prepaid to a motor manufacturer’s authorized station for inspection and repair or replacement. Delta will not be responsible for any asserted defect which has resulted from normal wear, misuse, abuse or repair or alteration made or specifically authorized by anyone other than an authorized Delta service facility or representative. Under no circumstances will Delta be liable for incidental or consequential damages resulting from defective products. This warranty is Delta’s sole warranty and sets forth the customer’s exclusive remedy, with respect to defective products; all other warranties, express or implied, whether of merchantability, fitness for purpose, or otherwise, are expressly disclaimed by Delta.

Printed in U.S.A.
DATED 6-7-96
PART NO. 1340208
©Delta International Machinery Corp. 1996

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