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Delta 31 - page 1
INSTRUCTION MANUAL 6" Belt and 12" Disc Abrasive Finishing Machine (Model 31-731) P ART NO. 420-01-651-0013 - 05-28-03 Copyright © 2003 Delta Machinery T o learn more about DEL T A MACHINER Y visit our website at: www .deltamachinery .com. For Parts, Service, W arranty or other Assistance, please call 1-800-223-7278 ( In Canada call 1-80 ...
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Delta 31 - page 2
2 Indicates an imminently hazardous situation which, if not avoided, will r esult in death or serious injury . Indicates a potentially hazardous situation which, if not avoided, could r esult in death or serious injury . Indicates a potentially hazardous situation which, if not avoided, may r esult in minor or moderate injury . Used without the saf ...
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Delta 31 - page 3
3 1. FOR YOUR OWN SAFETY , READ THE INSTRUC- TION MANUAL BEFORE OPERA TING THE MACHINE. Learning the machine’ s application, limitations, and specific hazards will gr eatly minimize the possibility of accidents and injury . 2. USE CERTIFIED SAFETY EQUIPMENT . Eye protection equipment should comply with ANSI Z87.1 standards, hearing equipment shou ...
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Delta 31 - page 4
4 F AILURE TO FOLLOW THESE RULES MA Y RESUL T IN SERIOUS PERSONAL INJUR Y . ADDITIONAL SAFETY RULES FOR ABRASIVE FINISHING MACHINES SA VE THESE INSTRUCTIONS. Refer to them often and use them to instruct others. 1. DO NOT OPERA TE THIS MACHINE until it is completely assembled and installed according to the instructions. A machine incorrectly assembl ...
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Delta 31 - page 5
5 A separate electrical circuit should be used for your machines. This cir cuit should not be less than #12 wire and should be protected with a 20 Amp time lag fuse. If an extension cor d is used, use only 3-wire extension cor ds which have 3- prong gr ounding type plugs and matching receptacle which will accept the machine’ s plug. Before connec ...
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Delta 31 - page 6
6 Use proper extension cor ds. Make sure your extension cor d is in good condition and is a 3-wire extension cord which has a 3-pr ong grounding type plug and matching r eceptacle which will accept the machine’ s plug. When using an extension cord, be sur e to use one heavy enough to carry the current of the machine. An undersized cord will cause ...
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Delta 31 - page 7
7 FOREWORD Delta Model 31-731 is a abrasive finishing machine. The Delta Model 31-731 includes two tilting tables, 4½" arbor pulley , V -belt, 80-grit aluminum oxide belt and 50-grit aluminum oxide disc. FUNCTIONAL DESCRIPTION UNP ACKING AND CLEANING YOUR MACHINE IS SHIPPED WITHOUT BEL T TENSION APPLIED TO THE SANDING BEL T . BEFORE OPERA TIN ...
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Delta 31 - page 8
8 ALIGNING PULLEYS, ASSEMBLING BEL T AND ADJUSTING BEL T TENSION DISCONNECT MACHINE FROM POWER SOURCE Using a straight edge (A) Fig. 6, make certain the motor pulley (B) is aligned with the arbor pulley . If necessary , the motor pulley (B) can be adjusted on the motor shaft by loosening set screw and moving the motor pulley (B) in or out as needed ...
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Delta 31 - page 9
9 OPERA TING CONTROLS AND ADJUSTMENTS ST AR TING AND STOPPING THE ABRASIVE FINISHING MACHINE T o start the machine, push “ON” button (A) Fig. 10. T o stop the machine, push “OFF” button (B). LOCKING SWITCH IN THE “OFF” POSITION IMPORT ANT : When the tool is not in use, the switch should be locked in the OFF position using a padlock (A) ...
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Delta 31 - page 10
10 3. Loosen tracking lock knob (D) Fig. 14, and while rotating the belt (F) by hand, as shown, tighten or loosen tracking knob (E) until the belt is running true on the pulleys. 4. Then jog the machine on and off to check further if the belt is tracking properly . If the belt is leading to one side or the other , very gently turn the tracking knob ...
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Delta 31 - page 11
11 ADJUSTING POSITION OF SANDING ARM DISCONNECT MACHINE FROM POWER SOURCE. The sanding arm can be positioned in the vertical or horizontal position, or at any desired angle in between as follows: 1. Loosen two bolts (A) Fig. 18, move the sanding arm to the desired position, and tighten the two bolts. THE SANDING ARM SHOULD NEVER BE REPOSITIONED WHI ...
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Delta 31 - page 12
12 ADJUSTING T ABLE SQUARE WITH SANDING DISC DISCONNECT MACHINE FROM POWER SOURCE. 1. Place an accurate square (C) Fig. 23, on the table with one end of the square against the disc. 2. Loosen the table locking knobs (A) Fig. 23, which are located on each end of the table and move the table until it is at 90 degrees to the disc. Then tighten the tab ...
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Delta 31 - page 13
13 ADJUSTING THE PLA TEN The platen (A) Fig. 24, is set at the factory 1/32 of an inch higher than the crown of the drums (B). This allows the belt, when properly tensioned, to lay flat on the platen and eliminate stretching and bulging which might occur if the platen is not at the right height. When using the machine with a loose belt for "st ...
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Delta 31 - page 14
14 NOTES ...
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Delta 31 - page 15
15 P AR TS, SERVICE OR WARRANTY ASSIST ANCE All Delta Machines and accessories are manufactur ed to high quality standards and ar e serviced by a network of Porter -Cable • Delta Factory Service Centers and Delta Authorized Service Stations. T o obtain additional information regar ding your Delta quality product or to obtain parts, service, warra ...
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Delta 31 - page 16
The following are trademarks of POR TER-CABLE · DEL T A (Las siguientes son marcas registradas de POR TER-CABLE S.A.): Auto-Set ® , BAMMER ® , B.O.S.S. ® , Builder’ s Saw ® , Contractor’ s Saw ® , Contractor’ s Saw II™, Delta ® , DEL T ACRAFT ® , DEL T AGRAM™, Delta Series 2000™, DURA TRONIC™, Emc²™, FLEX ® , Flying Chips? ...
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