UNIVERSAL BENDER
MODEL G7153
INSTRUCTION MANUAL
COPYRIGHT © JANUARY, 1999 BY GRIZZLY INDUSTRIAL, INC.
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
GRIZZLY ID # 404001623. REVISED JANUARY, 2003. PRINTED IN CHINA
ONLINE MANUAL DISCLAIMER
THE INFORMATION IN THIS MANUAL REPRESENTS THE CONFIGURATION OF THE MACHINE AS IT IS CURRENTLY BEING SHIPPED. THE
MACHINE CONFIGURATION CAN CHANGE AS PRODUCT IMPROVEMENTS ARE INCORPORATED. IF YOU OWN AN EARLIER VERSION OF THE
MACHINE, THIS MANUAL MAY NOT EXACTLY DEPICT YOUR MACHINE . CONTACT CUSTOMER SERVICE IF YOU HAVE ANY QUESTIONS
ABOUT DIFFERENCES. PREVIOUS VERSIONS ARE NOT AVAILABLE ONLINE.
UNPACKING
CLEAN UP
The cast iron and other unpainted parts of the
Model G7153 may be coated with a waxy oil that
protects them from corrosion during shipment.
Remove the protective coating with mineral spir-
its and paper towels.
The Model G7153 Heavy-Duty Universal Bender
is shipped from the manufacturer in a carefully
packed carton. If you discover the tool is dam-
aged after you’ve signed for delivery, please call
Customer Service immediately for advice.
Save the containers and all packing materials for
possible inspection by the carrier or its agent.
Otherwise filing a freight claim can be difficult.
Do not use gasoline or other petroleum based
solvents because of their extremely low flash
points. Do not use chlorine-based solvents – if
you happen to splash some onto a painted
surface, you’ll ruin the finish.
When you are completely satisfied with the con-
dition of your shipment, you should inventory its
parts.
Refer to the attached parts list and make certain
you have all the parts and dies included with this
bending tool. If any components are missing,
contact Customer Service.
Follow the safety rules listed below when
working with solvents:
1.
Read and follow all directions and warn-
ings on the solvent label.
In the event that any non-proprietary parts are
missing (e.g. a nut or a washer), we would be
glad to replace them, or, for the sake of expedi-
ency, replacements can be obtained at your local
hardware store.
2.
3.
Work only in a well ventilated area.
Do not work near any type of open flame
(e.g., pilot lights, kerosene heaters, and
so on).
4. DO NOT
smoke while working with flam-
mable material.
5.
Paper towels from the cleaning process
are extremely combustible. Dispose of
waste towels so they do not create a fire
Serious personal injury may
hazard.
occur.
MOUNTING
The G7153 Universal Bender must be securely
mounted to a solid surface before using.
Operating the tool for certain operations will
require exerting considerable force on the han-
dle, thus it is essential that the tool be mounted to
a heavy or immovable work bench or other work
surface. Be certain there will be adequate clear-
ance for the entire range of motion of the handle
with no potential pinch points for the operator’s
hands.
-2-
G7153 Universal Bender
GENERAL INFORMATION
Grizzly Industrial, Inc. is proud to offer the Model
Most important, we stand behind our tools. We
have an excellent service department at your dis-
posal should the need arise. If you have any ser-
vice questions or parts requests, please call or
write to us at the location listed below.
G7153 Heavy-Duty Universal Bender. The
G7153 is part of Grizzly’s growing family of fine
metalworking machinery. When used according
to the guidelines stated in this manual, you can
expect years of trouble-free, enjoyable operation.
Grizzly Industrial, Inc.
1203 Lycoming Circle
Muncy, PA 17756
Phone:(717) 326-3806
Fax:(800) 438-5901
The Model G7153 is intended for home and
medium duty professional use. The G7153 fea-
tures cast iron construction for rigidity and
strength. This bender has a bending capacity of
281⁄2 tons per square inch which can be used to
shape iron, steel, wrought iron, brass, copper and
aluminum.
E-Mail: [email protected]
To comment on this manual write to:
Maximum Capacities
are:
for these various materials
Grizzly Industrial, Inc.
Technical Documentation
P.O. Box 2069
C
⁄
O
5
Steel & Iron
Wrought Iron
Brass & Copper
Aluminum
⁄
8" Round Stock
1
⁄
2" x 1⁄2" Square Stock
Bellingham, WA 98227
13⁄16" x 5⁄16" Strip Stock
15⁄32" Round Stock
13⁄32" x 13⁄32" Square Stock
13⁄16" x 1⁄4" Strip Stock
To operate this, or any other tool safely and
efficiently, it is essential to become as familiar
with it as possible. The time you invest before
you begin to use your Model G7153 will be
5
⁄
8" Round Stock
15⁄32" x 15⁄32" Square Stock
13⁄16" x 5⁄16" Strip Stock
DO NOT
time well spent.
operate this tool until
you are completely familiar with the contents
of this manual.
23⁄32" Round Stock
19⁄32" x 19⁄32" Square Stock
13⁄16" x 13⁄32" Strip Stock
We are also pleased to provide this manual with
the Model G7153. It was written to guide you
through assembly, review safety considerations,
and cover general operating procedures. It repre-
sents our latest effort to produce the best docu-
mentation possible. If you have any criticisms that
you feel we should address in our next printing,
please write to us at the Bellingham, WA address
at the end of this section.
G7153 Universal Bender
-3-
OPERATING PROCEDURES
7.
Set stock against the Round Die and close the
Vise so that it clamps the work securely
against the Die.
General
8.
Move the Bending Block in until it is up against
the work and its Face (16) is even with the
Vise Face (8). Secure the Bending Block by
tightening the two Bolts.
Your tool is capable of many different types of
bending operations. Materials which can be
shaped include steel, iron, brass, wrought iron
and aluminum.
9.
Move the Bending Block to the left with the
Handle (27) until you have achieved your
desired angle bend, remembering to account
for “spring-back”.
If you wish to do repeat bends at the same
arc, tighten the Stop at the point where you
finished making your bend and tighten it.
When you wish to do complete 360° rings,
make sure you clamp the very end of your
workpiece in-between the Vise and the Die.
Bend your stock all the of the way around, and
cut off the excess.
To determine how to properly set the tool up, you
first must determine what type of bending opera-
tion you wish to perform. Round shapes, angles
or spiral operations are each described in the
following sections. The numbers in parentheses
relate to the reference number on the exploded
parts view on page 8.
10.
11.
When performing the bending operations, be
aware of the “spring-back” characteristic of cer-
tain materials. This will require that you overbend
the material to a certain degree to end up with the
desired degree of bend. Different materials have
differing degrees of springback. Do a test bend to
determine how much “spring-back” you will need
to compensate for.
12.
To make springs, loosen the Stop (2), and lift
the stock to be formed slightly as you bend the
stock around the Die. When starting and fin-
ishing the spring, make a complete 360° ring
as described in Step #11.
Round Operations
1.
Make sure the Die Mounting Plate (4) is
Figure 1
attached to the Body. Refer to
for the
hole positions needed for Round Operations.
2.
3.
Make sure the Stop (2) is loose.
Move the Vise Assembly (5-9 & 15) to the rear
position on the arm of the Mounting Plate.
4.
Screw the Round Die Mounting Shaft (28) into
the Mounting Plate.
5
6
. Set the Round Die (29) onto the Mounting
Shaft.
. Move the Bending Block Assembly (16, 17,
22-24) back all of the way. You may have to
release the Bending Block Locking Plate (21)
by loosening the two Hex Key Bolts (20). Do
not secure the Locking Plate at this time.
Figure 1.
Die Mounting Plate Hole Location
(A) Insert Round Die Mounting Shaft here
(B) Insert Hex Key Bolts here
(C) Insert Angle Die Spring here
(D) Insert Angle Die Hex Bolt here
-4-
G7153 Universal Bender
Bolt (17). This will reveal the Bending Block
Wheel (22).
Angle Operations
For steps 3, 4, & 8, see Figure 2.
3.
Attach the Spring Forming Mounting Disc (32)
with two Hex Key Bolts (in position1).
Place the Spring Pin (25) of the Spring Forming
Die “A” (31) into the hole 3 and attach the long
Hex Key Bolt (26) in position 2.
1.
Make sure the Die Mounting Plate (4) is
Figure 1
attached to the Body. Refer to
for the
4.
hole positions needed for Angle Operations.
2.
3.
Make sure the Stop (2) is loose.
For steps 5 & 7, see Figure 3.
5.
Move the Vise Assembly (5-9 & 15) to the for-
ward position on the arm of the Mounting
Plate.
Insert the stock to be bent into the hole of Die
“A”.
6.
Move the Bending Block Assembly forward
until it contacts the stock and tighten it in posi-
tion.
Bend the stock until the portion being formed
is about at the Pin (marked with a “P” in the
figure).
Now put the Spring Pins (25) of Spring
Forming Die “B” (30) into holes 4 & 5.
Finish your bend by wrapping completely
around the Forming Dies.
4.
5.
Place the Angle Die’s (13) Spring Pin (19) into
the Mounting Plate’s small unthreaded hole.
Attach the Angle Die by screwing the Hex Key
Bolt (18) into the small threaded hole of the
Mounting Plate.
7.
6.
Move the Bending Block Asembly (16, 17, 22-
24) back all of the way. You may have to
release the Bending Block Locking Plate (21)
by loosening the two Hex Key bolts (20). Do
not secure the Locking Plate at this time.
8.
9.
7.
8.
9.
Set the stock against the Angle Die and close
the Vise so that it clamps the work securely
against the Die.
Move the Bending Block until it is up against
the work and its Face (16) is even with the
Vise Face (8).
Move the Bending Block to the left with the
Handle (27) until you have achieved the your
desired angle bend. Remember to account for
“spring-back”.
10.
11.
To make repeat bends at 90°, use the Angle
Gauge Assembly (10-12). Screw the Gauge
Shaft (10) into the Angle Die. Slide the Gauge
Stop (11) onto the Shaft to the desired posi-
tion (depending upon the length of your work).
This will “stop” the bend at the proper location.
Figure 2
Spring Form Mounting Disc
If you wish to do repeat bends at the same
angle (other than 90°), use the Stop (2).
Spiral Operations
1.
2.
Remove the Die Mounting Plate (4) by remov-
ing the two Hex Key Bolts (4). Loosen the
Stop (2).
Retract the Bending Block Assembly (16, 17
22-24) all of the way. Remove the Face Plate
(16) by unscrewing the associated Hex Key
Figure 3
Spring Forming Die
G7153 Universal Bender
-5-
G7153 Universal Bender Exploded Parts View
-6-
G7153 Universal Bender
REF
QTY
DESCRIPTION
1
2
3
4
5
6
7
8
1
1
1
1
1
1
1
1
2
1
1
1
1
2
1
1
1
1
1
2
1
BASE
STOP
BODY
DIE MOUNTING PLATE
VISE DRIVE SCREW
VISE HANDLE
VISE BASE
VISE FACE
HEX KEY BOLT
GAUGE STOP
GAUGE SHAFT
GAUGE LOCKING SCREW
ANGLE DIE
HEX KEY BOLT
SET SCREW
BENDING BLOCK FACE PLATE
HEX KEY BOLT
HEX KEY BOLT
SPRING PIN
HEX KEY BOLT
9
10
11
12
13
14
15
16
17
18
19
20
21
BENDING BLOCK LOCKING
PLATE
22
23
24
25
26
27
28
29
30
31
32
1
1
1
3
1
1
1
1
1
1
1
BENDING BLOCK WHEEL
BENDING BLOCK SHAFT
BENDING BLOCK
SPRING PIN
HEX KEY BOLT
HANDLE
ROUND DIE MOUNTING SHAFT
ROUND DIE
SPRING FORMING DIE “B”
SPRING FORMING DIE “A”
SPRING FORMING DIE
G7153 Universal Bender
-7-
CLOSURE
If you need parts or help in assembling your
We recommend you keep a copy of our current
catalog for complete information regarding
Grizzly's warranty and return policy. If you need
additional technical information relating to this
machine, or if you need general assistance or
replacement parts, please contact the Service
Department listed in Section 3: General
Information.
machine, or if you need operational information,
we encourage you to call our Service
Department. Our trained service technicians will
be glad to help you.
If you have comments dealing specifically with
this manual, please write to our Bellingham,
Washington location using the address in the
Introduction. The specifications, drawings, and
photographs illustrated in this manual represent
the Model G7153 as supplied when the manual
was prepared. However, due to Grizzly’s policy of
continuous improvement, changes may be made
at any time with no obligation on the part of
Grizzly. Whenever possible, though, we send
manual updates to all owners of a particular tool
or machine. Should you receive one, add the new
information to this manual and keep it for refer-
ence.
Additional information sources are necessary to
realize the full potential of this machine. Trade
journals, woodworking magazines, and your local
library are good places to start.
As with all tools, there is danger associated
with the Model G17153 Universal Bender. Use
the tool with respect and caution to lessen the
possibility of mechanical damage or operator
injury. If normal safety precautions are over-
looked or ignored, injury to the operator or oth-
Serious personal injury
ers in the area is likely.
may occur.
We have included some important safety
measures that are essential to this machine’s
operation. While most safety measures are
generally universal, Grizzly reminds you that
each workshop is different and safety rules
should be considered as they apply to your
specific situation.
The Model G7153 was specifically designed for
DO NOT MODIFY
metal bending operations.
AND/OR USE THIS BENDER FOR ANY OTHER
PURPOSE. Modifications or improper use of this
tool will void the warranty.
If you are confused
DO NOT
about any aspect of this machine,
use it
until you have answered all your questions.
-8-
G7153 Universal Bender
WARRANTY AND RETURNS
Grizzly Industrial, Inc. warrants every product it sells for a period of 1 year to the original purchaser from
the date of purchase. This warranty does not apply to defects due directly or indirectly to misuse, abuse,
negligence, accidents, repairs or alterations or lack of maintenance. This is Grizzly’s sole written warranty
and any and all warranties that may be implied by law, including any merchantability or fitness, for any par-
ticular purpose, are hereby limited to the duration of this written warranty. We do not warrant or represent
that the merchandise complies with the provisions of any law or acts unless the manufacturer so warrants.
In no event shall Grizzly’s liability under this warranty exceed the purchase price paid for the product and
any legal actions brought against Grizzly shall be tried in the State of Washington, County of Whatcom.
We shall in no event be liable for death, injuries to persons or property or for incidental, contingent, spe-
cial, or consequential damages arising from the use of our products.
To take advantage of this warranty, contact us by mail or phone and give us all the details. We will then
issue you a “Return Number,’’ which must be clearly posted on the outside as well as the inside of the car-
ton. We will not accept any item back without this number. Proof of purchase must accompany the mer-
chandise.
The manufacturers reserve the right to change specifications at any time because they constantly strive to
achieve better quality equipment. We make every effort to ensure that our products meet high quality and
durability standards and we hope you never need to use this warranty.
Please feel free to write or call us if you have any questions about the machine or the manual.
Thank you again for your business and continued support. We hope to serve you again soon.
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