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Current Tools
for bending 1/2" thru 2" RIGID - EMT - IMC
and 40 mil PVC coated RIGID Conduit
Operating, Maintenance, Safety
CURRENT TOOLS • P. O. BOX 17026 GREENVILLE, SC 29606
800.230.5421 or 864.721.4230 • FAX 864.721.4232
77 Series Electric Bender – 220 Volt
™
with Single Shoe Groups
and Parts Manual
Read and understand this material before
operating or servicing this Bender. Failure to
understand how to safely operate and service
this unit may result in serious injury or death.
This manual is free of charge. All personnel who operate this Bender
should have a copy of this manual and read and understand its
contents. To request a copy, call or write to the address below.
www.currenttools.com
06/17
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Related Manuals for Current Tools RotaBoom 77-22
Summary of Contents for Current Tools RotaBoom 77-22
- Page 1 To request a copy, call or write to the address below. CURRENT TOOLS • P. O. BOX 17026 GREENVILLE, SC 29606 800.230.5421 or 864.721.4230 • FAX 864.721.4232...
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Page 2: Table Of Contents
TABLE OF CONTENTS Safety Alerts ..................3 Important Safety Information ............4, 5 Specifications – 77 Series Electric Bender – 220 Volt ....6 Model Descriptions ................ 6 Features ..................6, 7 Shoe Groups ................... 8 Conduit Centerline Bending Radii ..........8 Grounding Instructions ..............9 Mounting Bending Shoes .............10 Mounting Roller Supports ............11 General Bending Instructions ..........12, 13... -
Page 3: Safety Alerts
SAFETY ALERTS Safety Alert Symbol THIS SAFETY SYMBOL is used to call your attention to instructions that concern your personal safety. It means: ATTENTION! BE AWARE! THIS IS AN IMPORTANT SAFETY INSTRUCTION! Read, understand, and follow these safety instructions. Failure to follow these safety instructions may result in injury or death. -
Page 4: Important Safety Information
RETAIN SAFETY INFORMATION This manual should be read and understood by all personnel who operate or service this bender. Failure to understand how to safely operate and service this unit could result in injury or death. This unit should only be operated and serviced by qualified personnel. -
Page 5: Important Safety Information
DANGER IMPORTANT SAFETY INFORMATION continued — WARNING ALWAYS use recommended accessories. Consult this manual for DANGER recommended accessories. The use of improper accessories may cause risk of injury. CAUTION DANGER WARNING ALWAYS keep hands and feet away from pinch points such as bending shoes, roller supports and conduit when bender is in use. -
Page 6: Specifications - 77 Series Electric Bender - 220 Volt
SPECIFICATIONS – 77 SERIES ELECTRIC BENDER SPECIFICATIONS - 77 SERIES ELECTRIC BENDER WITH SINGLE SHOE GROUPS 1/2" thru 2" RIGID conduit No modification to the 1/2" thru 2" EMT conduit 77-22 POWER UNIT is required to accommodate these shoes 1/2" thru 2" IMC conduit or roller supports. -
Page 7: Features
FEATURES continued — Special Features The 77 Series Electric Benders have a unique feature to remove the handles during a “Dog-Leg Bend." See Figure 7a below. REMOVE BOTH SCREWS AND NUTS ON EACH SIDE TO REMOVE HANDLE Figure 7a WARNING When replacing handle, be sure to replace screws and nuts and also to tighten securely before moving or transporting. -
Page 8: Shoe Groups
SINGLE SHOE GROUPS RIGID 700SE - for bending 1/2" thru 2" EMT ( Thinwall ) includes the following items. 700SR - for bending 1/2" thru 2" RIGID conduit, 1/2" thru 1 1/4" IMC conduit and 1/2" thru 2" schedule 40 pipe Catalog# Description includes the following items. -
Page 9: Grounding Instructions
GROUNDING INSTRUCTIONS WARNING ELECTRIC SHOCK HAZARD! Only connect the bender to a 15 AMP GFCI protected circuit. DO NOT modify the plug which is provided with the unit. Failure to follow these warnings can result in serious injury or death. NEMA 6-15 RECEPTACLE PLUG... -
Page 10: Mounting Bending Shoes
MOUNTING BENDING SHOE Choose the desired shoe (RIGID, IMC, EMT, or 40 mil PVC coated RIGID) and slide shoe onto the main drive sprocket shaft. See Figure 10a below. Note: Rigid and IMC conduit are bent on the same shoe. However, the roller supports are specific for Rigid or IMC. -
Page 11: Mounting Roller Supports
Model #77-22 Bender. In addition, most bending shoes and attachments for the Model #77-22 Bender will fit the Greenlee and 555 Classic bender. ® ® ® Contact Current Tools for specific applications and compatibility. * Greenlee ® ® and 555 Classic ® are registered trademarks of Greenlee/Textron. -
Page 12: General Bending Instructions
GENERAL BENDING INSTRUCTIONS Bending instructions for: 1/2" thru 2" RIGID conduit 1/2" thru 1 1/4" EMT conduit 1/2" thru 1 1/4" IMC conduit 1/2" thru 2" 40 mil PVC coated RIGID conduit 1/2" thru 2" schedule 40 pipe See pages 10 and 11 for mounting shoe and roller support. Be sure to match the appropriate shoe with its corresponding roller support. - Page 13 GENERAL BENDING INSTRUCTIONS continued — 3. After marking the pipe/conduit, place it into the bender. See Figure 12. The pipe/conduit should slide over the correct size roller support, through the shoe groove and into the hook. The bending mark should be at the front ( OUTSIDE ) edge of the hook.
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Page 14: Bending Instructions For " And 2" Emt & Imc Conduit
BENDING INSTRUCTIONS FOR 1 1/2" AND 2" EMT & IMC CONDUIT 1. See pages 10 and 11 for mounting shoe and roller support. Be sure to match the appropriate shoe with its corresponding roller support. NOTE: The frame color of the EMT roller support is silver (see Figure 14a). The frame color of the IMC roller support is yellow (see Figure 14b). - Page 15 BENDING INSTRUCTIONS FOR 1 1/2" AND 2" EMT & IMC CONDUIT continued — 3. Rotate the bending shoe to 10 degrees below the 0 (zero) degree setting. See Figure 12. 4. After marking the pipe/conduit, place it into the bender. The pipe/conduit should slide over the roller support and through the shoe groove and into the hook.
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Page 16: And 2" Emt & Imc Conduit
BENDING INSTRUCTIONS FOR 1 1/2" AND 2" EMT & IMC CONDUIT continued — 6. Keep foot pressure on the engaging pedal and push the “Bend/Unload” switch to the “Bend” position. Then press the “Jog” button. The conduit will pull the roller support against the stop. Foot pressure can then be removed from the engaging pedal. -
Page 17: Squeeze Adjustment Procedure For
SQUEEZE ADJUSTMENT PROCEDURE FOR 1 1/2" AND 2" EMT & IMC ROLLER SUPPORTS The 1 1/2" and 2" rollers on the single shoe EMT Roller Support and the 1 1/2" and 2" rollers on the single shoe IMC Roller Support on the 77 bender have a Squeeze Adjustment feature if wrinkling or side marking becomes a problem during the bending process. -
Page 18: Maintenance
MAINTENANCE WARNING ALWAYS disconnect power supply before removing any guards or covers and before servicing this bender. Failure to do so may result in serious injury or death. 1. The Gear Box is filled with oil at the factory and should not require periodic flushing. - Page 19 MAINTENANCE continued — 3. To inspect REAR #40 chain tension: • Check chain tension after an initial break-in period of 2 - 3 hours of use and tighten per the instructions below. See Figure 19. Thereafter, inspect monthly. • Remove the chain guard by taking out the 2 mounting screws. •...
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Page 20: Stub-Up Bending Information And Charts
STUB-UP BENDING INFORMATION AND CHARTS — continued To locate bending marks and springback of 15, 30, 45, 60, and 90 degree bends for a desired stub: 1. Check Chart A, B, C or C1 on Page 21 for deduct length. Note that minimum stub length is deduct length plus 2". - Page 21 STUB-UP BENDING INFORMATION AND CHARTS — continued Chart A – RIGID Conduit/Schedule 40 Pipe Conduit Deduct ————— Springback ————— Size Length 15° 30° 45° 60° 90° 1/2" 7-1/2 3/4" 1" 1 1/4" 13-5/8 1 1/2" 14-7/8 2" 16-1/8 Chart B – EMT Conduit Conduit Deduct —————...
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Page 22: Offset Bending Information And Charts
OFFSET BENDING INFORMATION AND CHARTS To locate bending marks for a desired offset: 1. Measure distance from end of conduit to start of bend and mark conduit. ( Mark 1 ) See Figure 22a and 22b. 2. Refer to chart E for measurement “X" (see page 23) and deduct this distance from Mark 1 and place Mark 2 on conduit. - Page 23 OFFSET BENDING INFORMATION AND CHARTS — continued To locate center-to-center distance of offset bending marks other than those listed in Chart D, use the following multipliers. Multiply the height of offset desired by 3.86 on 15 degree bends, 2 on 30 degree bends, and 1.4 on 45 degree bends.
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Page 24: Troubleshooting
TROUBLESHOOTING WARNING ALWAYS disconnect power supply before removing any guards or covers and before servicing this bender. Failure to do so may result in serious injury or death. Problem Cause Diagnosis Cure 1. Bender will not operate Power source Check for voltage If power is on, at power source go to ( #3 ) -
Page 25: Exploded Views
PARTS LIST refer to on page 27 EXPLODED VIEWS... -
Page 26: Exploded Views
EXPLODED VIEWS continued — 76(7),80 44 (7) ELECTRICAL PLATE MOUNTING HOLES-BENDER FRAME CIRCUIT BREAKER SWITCH REMOTE PENDANT... -
Page 27: Parts List
PARTS LIST — 77-22 SERIES ELECTRIC BENDER ITEM # PART # DESCRIPTION 1 ... 77-375..1 ....FRAME 2 . -
Page 28: Parts List
PARTS LIST continued — ITEM # PART # DESCRIPTION 41 ... 77-041..2 ... FITTING - 90° LIQUITITE 42 . -
Page 29: Electrical System Diagram
ELECTRICAL SYSTEM DIAGRAM... -
Page 30: Parts List - Bending Shoes & Roller Supports
PARTS LIST — SINGLE SHOES & ROLLER SUPPORTS 2-3000 & 2-4000 Bending Shoe & Roller Support — 1/2" to 2" RIGID Conduit AND Schedule 40 pipe 1/2" to 1 1/4" IMC conduit ITEM # PART # DESCRIPTION 1 ....2-1304 ....4 ............ DRIVE STUD 2 .... - Page 31 PARTS LIST — SINGLE SHOES & ROLLER SUPPORTS 2-3200 & 2-4300 Bending Shoe & Roller Support — 1/2" to 2" PVC Coated RIGID Conduit ITEM # PART # DESCRIPTION 1.......2-1304 ..... 4 ..........DRIVE STUD 2..... 2-2301-2 ....3 ......SCREW, SHOULDER SOCKET — 3/4 × 1 1/2" 3.......2-3203 .....
- Page 32 PARTS LIST — SINGLE SHOES & ROLLER SUPPORTS 2-3100 Bending Shoe 1/2" to 2" EMT Conduit ITEM # PART # DESCRIPTION 1 ....2-1304 ......4 ........DRIVE STUD 2 ....2-2301-2 ...... 3 ..SCREW, SHOULDER SOCKET — 3/4" × 1 1/2" 3 ....
- Page 33 PARTS LIST — SINGLE SHOES & ROLLER SUPPORTS 2-4200 Roller Support 1/2" to 2" EMT Conduit ITEM # PART # QTY. DESCRIPTION 1 ....2-1103 ....2 ........ ROLLER - 1.5" EMT 2 ....2-1108 ....1 ........SPACER TUBE 3 ....2-1109 ....4 ....... 3/4" RETAINER RING 4 ....2-1111 ....
- Page 34 PARTS LIST — SINGLE SHOES & ROLLER SUPPORTS 2-3000 Bending Shoe 1/2" to 2" IMC Conduit ITEM # PART # DESCRIPTION 1 ....2-1304 ......4 ........DRIVE STUD 2 ....2-2301-2 ...... 3 ..SCREW, SHOULDER SOCKET — 3/4" × 1 1/2" 3 ....
- Page 35 PARTS LIST — SINGLE SHOES & ROLLER SUPPORTS 2-4100 Roller Support — 1/2" to 2" IMC Conduit ITEM # PART # QTY. DESCRIPTION 1 ....2-1108 ......1 ........SPACER TUBE 2 ....2-1109 ......4 ........3/4" RETAINER RING 3 ....2-1111 ......1 ......187" DIA. X 1.25 LG ROLL PIN 4 ....2-1112 ......
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