nosstec 4126 User manual
Bending Roll Machine 4126
Operating instructiOns
4126 English, rev 4 3
Table of conTenTs
Main components ............................................................4
Operation .....................................................................5
Safety..........................................................................7
Service and maintenance .................................................. 12
Machine plates and stickers ............................................... 13
Dismantling the bending roll machine.................................... 14
Contact information................................................. See back
Note: We reserve the right to alter specifications without prior notice.
For copyright reasons all reproduction and copying of the texts, tables and illustrations within this manual is
prohibited without written permission from Nosstec AB.
Operating instructiOns 4126
42012-12- 06
Hand wheel for
lower roll
Top roll
Lower roll
Bending roll
Hand wheel for
bending roll
Cone bending
setting
Pull-out sleeve
for top roll
Handle
Main coMponenTs
Front side
Back side
Disclaimer: The machine pictured on this page is not necessarily representative of the actual product
as delivered. Differences in sizes, options and/or accessories may or may not be pictured here.
4126 English, rev 4 5
operaTion
Prebending
In order to avoid a flat part at the beginning of the workpiece, it should be prebent first. As the rolls are
asymmetrically mounted the prebending is carried out as per the drawing.
Fig. 1 The workpiece is introduced from the back of the machine and clamped between the upper
and lower rolls. By raising the bending roll the workpiece is bent to the required diameter.
Fig. 2 The prebent workpiece is introduced from the front and clamped between the upper and lower
rolls.
Fig. 3 The bending is carried out in one operation.
Bending
At the maximum operating length and the maximum sheet thickness tubes down to about 1,5 times the
diameter of the upper roll can be formed and for thinner sheets down to about 1,2 times the diameter of
the roll.
When bending steel sheet or stainless steel the maximum thickness capacity of the machine will be
reduced to about ⁄ compared to mild carbon steel sheet.
Adjustment of rolls
Introduce the workpiece between the upper and lower rolls and fasten it by raising the lower roll by
means of the handwheel on the left hand side of the machine.
In order to get the required bending diameter, the bending roll should by adjusted by means of the
handwheel of the right hand side of the machine.
Operating instructiOns 4126
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operaTion
Removal of workpiece
The finished workpiece is removed from the machine as follows:
• Pull out the sleeve of the upper roll on the right hand side.
• Swing out the released roll.
• Remove the workpiece.
• Swing back the upper roll to its initial position and push back the
sleeve.
Cone bending
In order to facilitate cone bending, the bending roll can be set diagonally
as follows:
• Loosen the internal hexagon screw on the left hand side of the
bending roll.
• Adjust the cam so that the required diagonal setting is obtained.
• Tighten the screw.
To reset, see “Parallel adjustment of rolls”.
Parallel adjustment of rolls
The parallelism of the lower- and bending rolls in relation to the upper roll is set by pressing the roll in
question towards the upper roll. Loosen the internal hexagon screw and turn the handle as much as pos-
sible. Set the released cam for the horizontal position and tighten the internal hexagon screw.
4126 English, rev 4 7
safeTy
General
This machine is designed with a view to eliminating personal injuries provided that the instructions in
this manual are being followed.
Only authorized and trained staff is allowed to use the machine. Read the whole instruction manual and
make sure that you understand the contents before the machine is taken into use. It is important that
you read the safety instructions below.
Safety instructions in connection with the installation
In order to prevent tensions in the machine it should be bolted to a solid workbench or onto
optional stand bolted safely to the floor.
Lifting instructions
This machine must be lifted by truck as long as it is
packed in a crate or a wooden case. When lifting it
from the packing to the permanent working site an
approved lifting device type travelling crane must be
used. Instructions for lifting be means of travelling
crane:
1. Check that the top roll is in the locked position.
2. Put a lifting sling around the rolls as per figure.
3. Lift carefully at the same time as you check that the
rolls are pressed together.
Regarding weights, see machine plate on the machine.
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safeTy
Application
Never use the machine for material which is outside the capacity range of the machine. Check
the machine plate for more information.
Before the machine is operated the following steps must be taken:
Check that all safety devices function and that they are not damaged. Also check that moveable parts are
not exposed to obstacles e.g. owing to incorrectly mounted guards or parts. Broken parts or safety com-
ponents must be changed by authorized staff. Contact Nosstec in case spare parts are needed. The ma-
chine has a 24 month applicable warranty from date of delivery. The warranty is only applicable as long
as original spare parts are used.
Check that the environment around the machine is suitable
• Do not expose the machine to rain.
• Do not use the machine in wet or damp premises.
• Check that the lighting of the premises is satisfactory.
• The floor must be clean, dry and free from oil and grease spots.
• Never use easily inflammable material close to the machine.
• Dirty working sites increase the risk of accidents.
Avoid unstable working positions
Check that the operator always has a secure and stable working position.
Do not keep tools on the machine
Remove all tools from the machine before it is operated.
All repairs must be carried out by authorized staff
The machine has been made according to valid safety rules. All repairs must be carried out by
trained and qualified staff. Only original spares must be used.
Note: If the repairs also involve dismantling of the machine, this must be carried out
according to the enclosed dismantling instruction. This instruction must not be kept
together with the machine.
4126 English, rev 4 9
safeTy
Danger zone
In connection with production work check that no part
of the body comes too close to the infeed side of the
clamping rolls of the machine (see figure).
Note: The infeed side may vary owing to the direction
of rotation of the rolls.
Keep the instruction manual of the machine in a safe place.
The instruction manual contains important information that besides the safety information also give im-
portant information regarding operation, service, maintenance etc.
Modification of the machine
All conversion, modification or change of this machine is strictly forbidden with the exception of
• Original spare parts
• Optional equipment supplied by the manufacturer.
Falling workpieces
Be careful when working with heavy workpieces so
that they do not fall down by mistake when the grip
loosens between the upper and lower rolls (see figu-
re). If necessary use a support table, travelling crane
or some other lifting device.
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safeTy
Pinching risk of the workpiece
Note that there is a pinching risk between the ends
of the workpiece, see figure.
Gearing protection
All machine transmissions are completely covered by fixed protections.
Note! The machine must not be run if one of these protections has been removed.
Service and maintenance
Before service and maintenance are carried out on the machine you must have had instructions from
your foreman. You must also read and understand this instruction manual. If the machine must be dis-
mantled, completely or partly, contact your foreman.
Protective clothing
Important! Never use gloves when bending, as this consider-
ably increases the risk of getting pinched between the rolls.
For other handling of the workpieces use gloves. The operator
must not carry belts, rings or necklaces.
Working shoes with steel inserts must be used.
Loose hanging clothes must not be used.
If the operator has long hair, this must not hang loose.
Deburring of the workpiece
Burrs and sharp edges must be removed from the workpiece before bending.
Pinching risk
4126 English, rev 4 11
safeTy
Safety in general
The chapters describing the safety devices are based on the assumption that the machine is used in the
manner described in this instruction manual, that the operator has got the necessary information regard-
ing the safety of the machine as well as the special risks involved with this type of machine.
If the machine is not used in the proper way, the manufacturer cannot be held responsible for personal
injuries or material damages, which may be the result. Also check the following:
• Take all necessary safety precautions when loading, setting, changing spare parts, cleaning, repairing
and servicing so that the exposed person cannot start the machine.
• Do not disconnect the safety devices of the machine.
• Do not remove any part of the machine belonging to the safety devices.
• Always check that all safety devices have been remounted after repair work etc.
Operating instructiOns 4126
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service and MainTenance
Installation
The machine must be placed on firm ground e.g. cemented floor or similar. The ground must be level in
order to avoid tensions in the machine when fixing it to the floor.
Maintenance
The 4126 machine is lifetime lubricated and must not be relubricated under normal circumstances.
4126 English, rev 4 13
Type
Capacity
Weight Kg
Machine no.
Machine plaTes and sTickers
Aluminium plate, blue anodized text.
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disManTling The bending roll Machine
Dismantling
If necessary, disassemble the machine very carefully and note how the parts were mounted. Please note
that only original spare parts from Nosstec are recommended for a fault free function.
www.nosstec.se
Nosstec AB • Kristineholmsvägen 12, 441 39 Alingsås, SWEDEN
Tel: +46 (0)512 298 85 • Fax: +46 (0)512 298 89 • E-mail: info@nosstec.se
For copyright reasons all reproduction and copying of the texts, tables and illustrations
within this manual is prohibited without written permission from Nosstec AB.
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