Delta 31-750 User Manual

INSTRUCTION MANUAL

Bench Random Orbital Sander

(Model 31-750)

REVISED 3-29-99 PA RT NO. 1348132

'Delta International Machinery Corp. 1999

TABLE OF CONTENTS

SAFETY RULES FOR ALL TOOLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

ADDITIONAL SAFETY RULES FOR ALL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

UNPACKING A N D CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

ASSEMBLY INSTRUCTIONS

Assembling Abrasive Discs To Disc Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Adjusting Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Assembling Fence To Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Assembling Dust Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Assembling Accessory 50-780 S tand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Assembling Sander To Accessory Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

ACCESSORY 31-752 DISC HOLDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

FASTENING SANDER TO SUPPORTING SURFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

CONNECTING SANDER TO POWERSOURCE

Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Motor Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Grounding Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Extension Cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

OPERATING CONTROLS AND ADJUSTMENTS

Starting And Stopping Sander . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Locking Switch In The OFF Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Changing Abrasive Discs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Delt a will rep air or replace, at it s expense and at it s option, any Delt a 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 Delt a factory service center or authorized service st ation with proof of purchase of the product within two years and provides Delt a 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 st ation for inspection and repair or replacement. Delta will not be responsible for any asserted defect which has resulted from nor mal wear, misuse, abuse or repair or alteration made or specifically authorized by anyone other than an authorized Delta Service facility or representative. Under no circumst ances will Delt a be liable for incident a l or consequential damages resulting from defective product s. This warranty is Delt a 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 Delt a.

Delt a Building Trades and Home Shop Machinery

Two Y ear Limited Warranty

SAFETY RULES

W oodworking can be dangerous if safe and proper operating procedures are not followed. As with all machinery, there are cert ain hazards involved with the operation of the product. Using the machine with respect and caution will considerably lessen the possi bility 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 cert ain applications only . Delt a 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 p articular applica tion, DO N O T use the machine until you have first cont acted Delt a to determine if it can or should be performed on the product.

DE LTA INTERNATIONAL MACHINERY CORP. MANAGER OF TECHNICAL SE RVICES 246 ALPHA DRIVE PITTSBURGH, PENNSYLVANIA 15238

(IN CANADA: 644 IMPERIAL ROAD, GUELPH, ONTARIO N1H 6M7)

W ARNING: FAILURE TO FOLLOW THESE RULES

M AY RESULT IN SERIOUS PERSONAL INJURY

1. FOR YOUR O W N SAFETY, READ INSTRUCTION MANUAL BEFORE OPERATING TH E TO O L. Learn the tool s application and limit ations as well as the specific hazards peculiar to it.

2. KEEP GUARDS IN PLACE and in working order.

3. ALWAYSWEAREYE PROTECTION.

4. GROUNDALLTOOLS. If tool is equipped with threeprong plug, it should be plugged into a three-hole electrical recept acle. If an adapter is used to accommodate a twoprong recept acle, the adapter lug must be att ached to a known ground. Never remove the third prong.

5. REMOVE ADJUSTING KEYS A N D WRENCHES. Form habit of checking to see that keys and adjusting wrenches are removed from tool before turning it on.

6. KEEP WORKAREA CLEAN. Cluttered areas and benches invite accident s.

7. DON T USEIN DANGEROUSENVIRONMENT. Don t use power tools in damp or wet locations, or expose them to rain. Keep work area well-lighted.

8. KEEP CHILDREN A ND VISIT O R S A W AY . All children and visitors should be kept a safe dist ance from work area.

9. MAKEWORKSHOP CHILDPROOF with p adlocks, master switches, or by removing st arter keys.

10. DON T FORCE TO O L. It will do the job better and be safer at the rate for which it was designed.

11. U S E RIGHT TOO L. Don t force tool or att achment to do a job for which it was not designed.

12. WEARPROPER APPAREL. No loose clothing, gloves, neckties, rings, bracelet s, or other jewelry to get caught in moving parts. Nonslip footwear is recommended. W ear protective hair covering to cont ain long hair.

13. A LW AYS US E SAFETY GLASSES.W ear safety glasses. Everyday eyeglasses only have impact resist ant lenses; they are not safety glasses. Also use face or dust mask if cutting operation is dusty.

14. SECURE WORK. Use clamp s or a vise to hold work when practical. It s safer than using your hand and frees both hands to operate tool.

15. D O N T O V E R R E A C H . Keep proper footing and balance at all times.

16. MAINTAIN TOOLSIN 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, bit s, cutters, etc.

18. USERECOMMENDED ACCESSORIES. The use of accessories and att achments not recommended by Delt a may cause hazards or risk of injury to persons.

19. REDUCE THE RISK O F UNINTENTIONAL STAR TI NG . Make sure switch is in OFF position before plugging in power cord.

20. NEVER STAND O N TOOL. Serious injury could occur if the tool is tipped or if the cutting tool is accident ally cont acted.

21. CHECK DAMAGEDPARTS. Before further use of the tool, a guard or other p art that is damaged should be care fully checked to ensure that it will operate properly and perform it s intended function check for alignment of moving part s, binding of moving p art s, breakage of part s, mounting, and any other conditions that may af fect it s operation. A guard or other p art that is damaged should be properly rep aired or replaced.

22. DIRECTION O F FEED. Feed work into a blade or cutter against the direction of rot ation of the blade or cutter only.

23.

NEVER LEAVE TO O L RUNNING UNATTENDED. TURN

POWEROFF

. 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. MAKESURE TOOL IS DISCONNECTED FROM POWER SUPPLY

while motor is being mounted, connected or re-

connected.

26. W ARNING: The dust generated by cert ain woods and wood products can be injurious to your health. Always oper ate machinery in well ventilated areas and provide for proper dust removal. Use wood dust collection systems whenever possible.

ADDITIONAL SAFETY RULES

FOR RANDOM ORBITA L SANDERS

1. W ARNING: D O N OT operate your random orbit al sander until it is completely assembled and inst alled according to the instructions .

2.IF Y O U A R E N O T thoroughly familiar with the oper ation of the random orbit al sander , obt ain advice from your supervisor, instructor or other qualified person.

3. USE FACE O R DUST MASK. WARNING: The dust generated by cert ain woods and wood product s can be injurious to your health. A L W A Y S operate machinery in well-ventilated areas and provide for proper dust removal. U S E wood dust collection systems whenever possible . Sanding of Lead-based p aint is NOT RECOMMENDED.

4. KEEP fingers away from rot ating abrasive disc.

5. MA KE SURE abrasive disc is not damaged and is properly secured on the disc plate before operating.

6. NEVER perform layout, assembly or set-up work on the t able while the sander is operating.

7. MA KE SURE workpiece is clear of abrasive disc before turning unit on.

8. KEEP WORKAREA CLEAN. Cluttered areas can create slipping or tripping hazards.

9. DON TFORCE TOOL. It will do the job better and be safer at the rate for which it was designed.

10. NEVER use machine for wet sanding which can create hazard of electrical shock.

11. U S E correctly sized abrasive disc. Maint ain minimum table opening to keep fingers from being pinched or workpiece being pulled down.

12. D O N O T sand near flammable liquids, vapors, or gases.

13. A LW A Y S support workpiece on work table. U S E sander on a solid supporting surface where there is plenty of room for handling and supporting workpiece.

14. CLEAR all debris from t able b efor e san ding the workpiece.

15. D O N O T use this sander to sand pieces too small to be held safely and securely by hand.

16. ALWAYSWEARPROPER EYE PROTECTION.

17. T H E U S E of attachments and accessories not recommended by Delt a may result in the risk of injuries.

18. PROTECT YOUR EARS. W ear proper hearing pro tection.

19. AFTER turning of f power switch, disconnect tool from power source and wait for sander to stop before servicing.

20. D O N O T wear gloves, neckties, jewelry or loose clothing.

21. MAINTAIN minimum clearance between abrasive disc and fence.

22. AVOID KICKBACKS by sanding lef t of disc center , holding workpiece firmly, and using support fence when possible.

23. KEEP hands and fingers out of dust chute.

24. D O N O T expose to rain or use in damp locations.

25. DISCONNECT MACHINE FROM POWERSOURCE BEFORE MAKING REPAIRS O R ADJUSTMENTS.

26. ADDITIONAL INFORMATION regarding the safe and proper operation of this product is available from the National Safety Council, 1121 Spring Lake Drive, It asca, IL 60143-3201, in the Accident Prevention Manual for Industrial Operations and also in the Safety Dat a Sheet s provided by the NSC. Please also refer to the American National Standards Institute ANSI 01.1 Safety Requirem e nt s for W oodworking Machinery and the U.S. D e p artment of Labor OSHA 1910.213 Regulations.

27. SAVE THESE INSTRUCTIONS.Refer to them of ten and use them to instruct others.

UNPACKING A N D CLEANING

Your new random orbit al sander is shipped complete in one cont ainer . Carefully unp ack the sander and all loose items from the shipping cont ainer. Clean all loose p art s. Fig. 2, illustrates the sander and all loose p art s supplied with the machine. If you purchased the accessory Model 50-780 Stand, Fig. 3 illustrates the component s of the st and.

ASSEMBLY INSTRUCTIONS

W ARNING: F O R YOUR O W N SAFETY, DO NOT CONNECT THE SANDER TO A POWER SOURCE UNTIL T HE MACHINE IS COMPLETELY ASSEMBLED AND YOU H AVE READ AND UNDERSTO O D THE ENTIRE OWNERS MANUAL. NOTE: Place the machine on a firm supporting surface and proceed with the assembly instructions. If you purchased the accessory 50-780 Steel S tand, this manual also cont ains instructions for it s assembly.

+ 8 hidden pages