Current Tools 753 User manual

Current Tools™Mechanical Bender
MODEL 753
For bending
½" to 1" Rigid/IMC conduit
½" to 1¼" EMT conduit
½" to 1" schedule 40 pipe
CURRENT TOOLS • P. O. BOX 17026 GREENVILLE, SC 29606
800.230.5421 or 864.721.4230 • FAX [phone]
www.currenttools.com
Operating, Maintenance, Safety
and Parts Manual
09/2016
This manual is free of charge. All personnel who operate or service this Mechanical Bender should have a
copy of this manual and read and understand its contents. To request a copy, call, write to the address below or
visit our website at www.currenttools.com. All information, specifications and product designs may change
due to design improvements or updates and are subject to change without notice. Current Tools does not
assume any liability for damages resulting from misuse or incorrect application of its products.
Read and understand this material before operating or servicing
this Mechanical Bender. Failure to understand how to safely
operate and service this unit may result in serious injury or death.

2
TABLE OF CONTENTS
Safety Alerts ....................................................................................3
Important Safety Information ........................................................4
Specifications...................................................................................5
Operating Instructions................................................................5, 6
Stup Up Bending Information........................................................7
Springback Charts...........................................................................8
Offset Bending Information and Charts..................................9, 10
Exploded Views and Parts List ....................................................11

Hazards or unsafe
p
ractices which, if not avoided, COULD result in serious
personal in
j
ur
y
or death
.
W
ARNIN
G
Hazards or unsafe
p
ractices which, if not avoided, COULD result in minor
personal in
j
ur
y
or propert
y
damage
.
CA
UTI
ON
Immediate hazards which, if not avoided, WILL result in serious
p
ersonal
in
j
ur
y
or death
.
DAN
G
E
R
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.
Safety Alert
Symbol
SAFETY ALERTS
3

Keep hands and feet away from pinch points such as bending shoe,
ratchet handle and conduit when operating the bender.
DO NOT leave the ratchet handle in the up position. The handle could
fall and cause serious injury.
DO NOT force tool. If bend cannot be completed with the supplied
ratchet handle, discontinue bend and determine cause before
continuing. DO NOT use a ratchet handle longer than 4'.
NEVER alter this equipment. Doing so will void the warranty and
could cause serious injury or death.
DO NOT stand on the bender. Serious injury could occur if bender is
tipped.
ALWAYS check for damaged or worn parts. Check for alignment of
moving parts, binding of moving parts, breakage of parts, mounting
and any other conditions that may affect its operation. Any part that is
damaged should be properly repaired or replaced.
ALWAYS keep conduit under control when unloading. Conduit not
under control could injure the operator or others in the area.
WEAR approved safety glasses when using the bender.
Bender MUST be used on a firm, flat surface.
DO NOT use on an inclined surface.
ALWAYS keep the path of the bending conduit clear of obstructions.
Keep firm hand pressure on the ratchet handle while bending. The
stored energy of bending conduit could cause the ratchet handle to
spring forward and strike operator or nearby personnel.
REMOVE the ratchet handle and conduit before moving or
transporting the bender.
ONLY use the bender for its intended purpose. Only use the bender to
bend the specified types and sizes of conduit or pipe.
Keep firm control of the bender T-handle when moving the bender to
avoid tipping over.
Bender is heavy and requires more than one person to lift.
RETAIN SAFETY INFORMATION
4
4
IMPORTANT SAFETY INFORMATION
This manual should be read and understood by all personnel who operate
or service this Mechanical Bender. Failure to understand how to safely
operate and service this unit could result in serious injury or death. This
unit should only be operated and serviced by qualified personnel.
WARNING
DANGER
CAUTION
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CAUTION

Model No. 753
Capacity 1⁄2" to 1" RIGID and IMC conduit
1⁄2" to 11⁄4" EMT conduit
1⁄2" to 1" schedule 40 pipe
Overall 461⁄2" × 241⁄2" × 38"
Dimensions
Weight 129 lbs.
5
OPERATING INSTRUCTIONS — MECHANICAL BENDER
1. Locate the Mechanical Bender on a firm, level surface.
2. Place the ratchet arm in the up position. This will release the ratchet pawl.
Rotate the bending shoe until the conduit hook for the size and type of
conduit you are bending is at approximately the 6 o'clock position. (See
Figure 5b).
NOTE: The bending shoe hooks are color coded. The blue hook is for Rigid/
IMC conduit and schedule 40 pipe. The silver hook is for EMT conduit.
3. Mark the conduit to desired length. Note that a minimum of 2" from the
end of the conduit to the front edge of the hook is required to eliminate
flattening the end of the conduit. See Figure 5b.
NOTE: Stub-up and offset information can be found on pages 7, 9 and 10
in this manual.
4. Place conduit into the bender. The conduit should slide over the roller
support, through the shoe groove and into the hook. The bending mark
should be at the front (outside) edge of the hook. See Figure 5b.
5. Cut a 4' length of 1" RIGID conduit and insert it into the ratchet arm as
shown in Figure 5a. This will serve as the ratchet handle.
SPECIFICATIONS – 753 MECHANICAL BENDER
Figure 5a
2"
MINIMUM
HOOK
BENDING
MARK
ROLLER
SUPPORT
Figure 5b
ROLLER
SUPPORT
RATCHET
HANDLE
BENDING HOOK
BEND DEGREE
INDICATOR
RATCHET
ARM

6
6. Adjust the bend degree indicator by hand (see Figure 5a) so that it is at the
zero (ø) position when the shoe hook first makes contact with the conduit.
7. Pull the ratchet handle down and return to the up position. Repeat until
you have completed the desired bend.
NOTE: Springback compensation is not calculated on the bend degree
indicator. Refer to the springback chart on page 8 to achieve your desired
degree of bend.
8. To remove the bent conduit, raise the ratchet handle to the up position and
remove the ratchet handle from the ratchet arm. While holding the bent
conduit, slowly rotate the bending shoe in the counter-clockwise direction
and remove the bent conduit.
NOTE: When not in use, the ratchet handle and ratchet arm MUST remain
in the down position.
OPERATING INSTRUCTIONS – CONTINUED
Remove the ratchet handle
before removing the bent conduit.
CAUTION

STUB
LENGTH
BENDING
MARK
DEDUCT
LENGTH
STUB
LENGTH
STUB
LENGTH
MARK
PLACE BENDING MARK IN LINE WITH
FRONT EDGE OF BENDING HOOK
7
STUB-UP BENDING INFORMATION
Figure 7a
Figure 7b
Figure 7c
To locate bending marks and springback of 15, 30, 45, 60, and 90 degree
bends for a desired stub:
1. Check Springback Chart A, B, or C for deduct length (See page 8).
Note that minimum stub length is deduct length plus 2".
2. Measure and mark desired stub length on conduit (stub length mark).
Subtract “Deduct Length" from this mark and make a second mark
(bending mark). (See Fig 7a and 7b). Place bending mark at front edge
of shoe hook. (See Figure 7c). Check Springback Chart A, B, or C for
springback of desired degree of bend (See page 8). Bender should be
advanced to this degree to obtain desired degree of bend.

8
SPRINGBACK CHARTS
Chart A – RIGID Conduit/Schedule 40 Pipe
Conduit
Size
Deduct
Length
————————— Springback —————————
15˚30˚45˚60˚90˚
1/2" 7 1⁄2"18 34 49 65 95
3/4" 9 1⁄4"17 33 48 62 92
1" 11" 18 33 50 65 95
Chart B – EMT Conduit
Conduit
Size
Deduct
Length
————————— Springback —————————
15˚30˚45˚60˚90˚
1/2" 7 1⁄2"19 34 49 65 96
3/4" 9" 19 34 50 65 97
1" 11" 19 34 50 65 97
1 1⁄4" 13 5⁄8"19 33 50 65 95
Chart C – IMC Conduit
Conduit
Size
Deduct
Length
————————— Springback —————————
15˚30˚45˚60˚90˚
1/2" 7 1⁄2"22 38 54 69 100
3/4" 9" 20 36 48 66 98
1" 11" 20 35 52 67 99
NOTE: Springback figures are approximate.
Minimum Stub Length = Deduct Length plus 2"

9
OFFSET BENDING INFORMATION AND CHARTS
Figure 9a
Figure 9b
Figure 9c
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 9b.
2. Refer to chart E (page 10) for measurement “X" and deduct this distance
from Mark 1 and place Mark 2 on conduit. See Figure 9b.
3. Refer to chart D (page 10) for center-to-center distance between marks.
Measure this distance from Mark 2 and place Mark 3 on conduit.
See Figure 9b.
4. Layout of bends is now complete. Next, place Mark 2 in line with front
edge of shoe hook, then check springback chart (page 8) and make first
bend. See Figure 9c.
5. Rotate conduit 180 degrees. Place Mark 3 in line with front edge of shoe
hook, then check springback chart (page 8) and complete second bend.
DEDUCT
LENGTH
MARK NO. 1 MARK NO. 3
CENTER TO CENTER
LENGTH
MARK NO. 2
END OF CONDUIT
TO START OF BEND
OFFSET
HEIGHT ANGLE
PLACE BENDING MARK IN LINE WITH
FRONT EDGE OF BENDING HOOK

10
OFFSET BENDING INFORMATION AND CHARTS
continued
TO LOCATE THE CENTER TO CENTER DISTANCE OF OFFSET
BENDING MARKS OTHER THAN THOSE LISTED IN CHART D, USE THE
FOLLOWING MULT IPLIERS: MULTIPLY THE HEIGHT OF THE OFFSET
DESIRED BY 3.86 ON 15° BENDS, 2 ON 30° BENDS, AND 1.4 ON 45° BENDS.
CONDUIT SIZE 1/2"
3/4" 1" 1-1/4"
"X"
2-1/2 3-1/16 3-1/16
4
CHART D
OFFSET
HEIGHT
2"
4"
6"
8"
10"
12"
14"
16"
18"
20"
22"
30° 45°15°
MAX
CONDUIT
SIZE
CENTER
TO
CENTER
MAX
CONDUIT
SIZE
CENTER
TO
CENTER
MAX
CONDUIT
SIZE
CENTER
TO
CENTER
3/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
1-1/4"
3/4"
1"
1/2"
1-1/4"
1"
7-3/4"
61-13/16"
15-7/16"
23-3/16"
30-7/8"
38-5/8"
46-3/8"
54-1/16"
69-9/16"
77-1/4"
85"
7-5/16"
11-15/16"
15-15/16"
19-15/16"
23-15/16"
27-15/16"
31-15/16"
35-15/16"
39-15/16"
43-15/16"
8-5/16"
11-1/16"
13-13/16"
16-5/8"
19-7/16"
22-1/4"
25-1/16"
27-15/16"
30-3/4"
FIGURES ARE APPROXIMATE
CHART E
END OF CONDUIT
TO START OF BEND
OFFSET
HEIGHT
ANGLE
ROTATE CHAIN
TENSIONER UPWARD
TO TIGHTEN CHAIN
CHAIN TENSIONER
HEX SCREW
1/4" MAX
LARGE
HOLES
SMALL HOLES
LARGE DRIVE STUD
LARGE DRIVE STUD
SMALL DRIVE STUD
SMALL DRIVE STUD
BENDING SHOE

11
EXPLODED VIEW
ITEM NO. PART NUMBER DESCRIPTION QTY.
1 77-007 2 1/2" RETAINER RING 1
2 77-070 SLEEVE BEARING 2
3 77-016 COTTER PIN – 3/16 × 1-1/4" LONG 2
4 77-017 WASHER – FLAT 3/4 (SAE) 2
5 280-2G NUT – HEX ZINC (1/2-13) 4
6 281-1F SCREW – HEX CAP GR5 ZINC (1/2"-13 × 1.5) 4
7 281-2C WASHER – LOCK 1/2" ZINC 4
8 333-7 NUT – HEX NYLON INSERT (1/2-13) 1
9 504-1 GRIP 2
10 509-13 8" WHEEL 2
11 750-18 NUT – LOCK, 7/8-9 1
12 750-22 1" RETAINER RING 1
13 750-349 DEGREE INDICATOR 1
14 750-394 1" WASHER 1
15 750-668 ROLLING STAND 1
16 750-9 SPRING 1
17 751-10 SET SCREW 1
18 751-419 SPACER 1
19 752-060 SHOE ASSEMBLY 1
20 752-068 RATCHET ARM ASSEMBLY 1
21 753-001 SCREW – HEX HEAD CAP GR5 ZINC (1/2-13 × 4.5) 1
22 753-002 CAP – PLASTIC 1
23 753-115 ROLLER SUPPORT WELDMENT 1
24 753-116 SHOE MOUNT WELDMENT 1
25 747-18 ROLL PIN – 3/16" × 1" 1