ALFRA TML 250 User manual

ALFRA TML 250
BEDIENUNGSANLEITUNG | OPERATION MANUAL
MODE D‘EMPLOI | MANUAL DE INSTRUCCIONES | GEBRUIKSAANWIJZING | BRUKSANVISNING
de LASTHEBEMAGNET
LIFTING MAGNET
eN
AIMANT DE LEVAGE
FR
IMÁN DE ELEVACIÓN DE CARGAS
eS
HEFMAGNEET
NL
LØFTEMAGNET
NO
ALFRA TML 250 #41250
AIMANT DE LEVAGE
IMÁN DE ELEVACIÓN DE CARGAS
HEFMAGNEET
LØFTEMAGNET
ALFRA TML 250
#41250
US Patent Nr. 8350663B1

11
Always...
•activate the lifting magnet completely
•activate the lifting magnet on metallic,
ferromagnetic materials
•use the whole magnetic surface for lifting
•lift on plane surfaces
•check the magnetic holding force by lifting the
load slightly by about 10 cm
•clean the magnetic surface and keep it clear of
dirt, chips, welding spatter
•set the lifting magnet down gently to prevent
damage to the magnetic surface
•check the magnetic surface and the entire
lifting magnet for damage
•use suitable lifting gear
•follow the instructions in the operating manual
•instruct new users in the safe use of lifting
magnets and read and understand the
operating manual
•respect local and country-specific guidelines
•keep and use in a dry environment
!
SAFETY INSTRUCTIONS
Danger can occur when transporting loads by lifting devices due to improper use and/or poor maintenance,
which may cause severe accidents and serious injury or even death. Please read and follow the operation
and safety information contained in this operating manual very carefully. If you have any questions, contact
the manufacturer.
Never...
•lift round or arched objects
•lift more than the specified maximum load
•transport loads above people’s heads
•lift several workpieces at once
•switch the lifting magnet o until the load has
been set down carefully
•set the load swinging or stop it abruptly
•lift loads which do not have the recommended
sizes
•lift loads with cavities, cut-out openings or
drilled holes
•lift uneven loads
•turn loads from horizontal to vertical
•turn the load hook under load
•modify the lifting magnet or remove signs
•use the lifting magnet when damaged or
when parts are missing
•strain the underside of the magnet through
heavy impact or blows
•stand under the lifted load
•lift loads when there is someone in the
hazard area
•leave the lifted load unattended
•use the lifting magnet without having been
properly instructed
•use the lifting magnet to support, lift or
transport persons
•operate the lifting magnet at temperatures
above 60°C (140°F)
•bring into contact with corrosive substances
!
People using pacemakers or other medical devices should not use this lifting magnet
until they have consulted with their physician.
ALFRA Compact®
Handstanze Gerade |
Straight PunchDriver |
Poinçonneuse droite |
Punzonadorarecta ALFRACompactCombi®
Handstanze90°|
PunchDriver90°|
Poinçonneuse90°|
Punzonadora90°
eN

12
PROPER USE
The permanent lifting magnet TML 250 has been designed for lifting ferromagnetic, metallic loads and may
only be used within the context of its technical data and purpose. Proper use also includes adherence to the
start-up, operating, environment and maintenance conditions specified by the manufacturer. Any use going
beyond this is considered improper, and the manufacturer will not be liable for any damage resulting from
such use.
DEVICE DESCRIPTION
The TML (Thin Material Lifter) magnet is a permanently magnetic lifting magnet with manual actuation for the
lifting, transporting and lowering of ferromagnetic materials. The magnetic field generated by the permanent
magnet in the lower magnetic plate (C) area can be activated by pressing the lever (F) down. Due to the special
design, a very compact magnetic field is generated which develops excellent adhesive force on thin materials
(less than 10 mm) in particular. The safety tab (E) has to be pressed with the heel of the hand to deactivate the
magnet; the lever can then be moved upwards. There is an eyelet located on the top of the lifting magnet for
attachment to a crane. The load-bearing capacity of the lifting magnet is 1/3 of the maximum pull-o strength of
the magnet and thus complies with the standard safety factor 3:1 (safe working load).
A) Load hook
B) Basic body
C) Magneticsurface
D)Center ofthemagnet
E) Safetytab
F) Lever foractivation/deactivation

13
MARKINGS ON THE LIFTING MAGNET
There are additional detailed descriptions for handling and conditions of use on both sides of the lifting
magnet. This labelling must not be modified, damaged or removed, as otherwise the manufacturer is
released from liability for any personal injuries, property damage or accidents resulting from this fact.
New labels must be ordered from the manufacturer if necessary.
TECHNICAL DATA
Prod.-No. 41250
Designation TML 250 Lifting magnet
Breakaway force >750 kg on 10 mm S235 >1650lbs on0, 4" AISI CRS 1020
Colled Rolled Steel
Max. load-bearing capacity:
(on flat material
with safety factor 3:1) 250 kg on 10 mm S235 550 lbs on0, 4" AISI CRS 1020
Colled Rolled Steel
Max. load-bearing capacity:
(at 6° inclination acc. to
EN 13155with safety factor 3:1) 230 kg on 10 mm S235 515 lbs on0,4" AISI CRS 1020
Colled Rolled Steel
Dead weight of the magnet 3.5 kg 7.7 lbs
Storage temperature -30°C to +60°C -22°F to +140°F
Operating temperature -10°C to +60°C +14°F to +140°F

14
STARTUP
You have received a completely assembled lifting magnet and detailed operating manual. Please check the
condition of the goods upon receipt for any damage incurred during transport, and make sure the delivery
is complete. If you have any problems, please contactthe authorized reseller or manufacturerimmediately.
1. The lever is facing upwards. The lifting magnet is deactivated.
2. Follow the safety instructions and clean the workpiece and the lower magnetic plate of the
lifting magnet if necessary.
3. Position the lifting magnet at the center of gravity of the load. The lifting magnet is pre-tensioned slightly
in order to avoid inadvertent slipping and dropping of the magnet (e.g. when used in a vertical or other
forced position).
4. Align the lifting magnet ideally according to the desired application.
5. Press the lever down as far as it will go into the ON position. Check that the safety tab has clicked
into place correctly.
6. Move the load hook to the required position and lift the load by about 10 mm to check its deformation
and the magnetic holding force.
7. Now move your load slowly and evenly, and avoid vibrations or impact.
8. After the load has been set down completely and safely, you can deactivate the lifting magnet. To do
this, press the safety tab using the heel of your hand and move the lever upwards into the OFF position.
Be sure to read the operation instructions completely before using this magnet for the first time!
!

15
BASIC INFORMATION RELATED TO THE HANDLING OF MAGNETIC
LIFTING GEAR, IN PARTICULAR TML
The magnetic surface is located on the underside of the lifting magnet and has multiple magnetic
poles which generate the magnetic holding force when activated. The maximum holding force that can
be achieved depends on dierent factors which are explained below:
Material thickness
The magnetic flow of the lifting magnet requires a minimum material thickness to be able to flow completely
through the load. If this material thickness is not given, the maximum holding force is reduced in accordance
with the material thickness. Conventional switchable permanent magnets have a deep penetrating magnetic
field similar to tree tap roots, and require a large material thickness to achieve the maximum holding force.
The compact magnetic field of the TML magnets is similar to a shallow root and achieves maximum holding
force even with small material thicknesses. (See table 2 in this operating manual)
Material
Every material reacts in a dierent way to penetration of the magnetic field lines. The load-bearing capacity
of the lifting magnets is determined using a low carbon material. Steels with a high carbon content or whose
structure has been changed by heat treatment have a low holding force. Foamed or porous cast components
also have a lower holding force, so that the given load-bearing capacity of the lifting magnet can be
downgraded on the basis of the following table 1.
Table 1
Surface quality
The maximum holding force of a lifting magnet is the result of a closed magnetic circuit in which the
magnetic field lines can connect up freely between the poles, thus creating a high magnetic flow. In contrast
to iron, for example, air has very high resistance to magnetic flow. If a kind of “air gap” is produced between
the lifting magnet and the workpiece, this reduces the holding force. In the same way, paint, rust, scale,
surface coatings, grease or similar substances all form a gap, or an air gap, between the workpiece and the
lifting magnet. The increasing surface roughness or unevenness of the surface also has a negative eect on
the holding force. Reference values can be found in the performance table of your lifting magnet.
Load dimensions
When working with large workpieces such as girders or plates, the load can deform during the lift. A large
steel plate would bend downwards at the outer edges and create a curved surface which no longer has full
contact with the bottom of the magnet. The resulting air gap reduces the maximum load-bearing capacity of
the lifting magnet. Hollow objects or those smaller than the magnetic surface will also result in less holding
power being available.
Load alignment
During load transport, care must be taken that the lifting magnet is always at the center of gravity of the work piece
and that load, or lifting magnet respectively, is always aligned horizontally. In this case, the magnetic force of the
lifter acts with its breakaway force perpendicular in relation to the surface, and the maximum rated load-bearing
capacity is achieved with the 3:1 standard safety factor.
If the position of work piece and lifting magnet changes from horizontal to vertical, the lifting magnet is operated
in shear mode and the work piece can slip away to the side. In shear mode, the load-bearing capacity decreases
dependent upon the coecient of friction between the two materials
Temperature
The high-power permanent magnets installed in the lifting magnet will begin to lose their magnetic
properties irreversibly from a temperature of more than 80°C (180°F), so that the full load-bearing capacity
is never reached again even after the magnet has cooled down.
Please note the specifications on your product or in the operating manual.
Material Magneticforce in %
Non-alloyed steel (0.1-0.3% C content) 100
Non-alloyed steel (0.3-0.5% C content) 90-95
Cast steel 90
Grey castiron 45
Nickel 11
Most stainless steels, aluminium, brass 0

16
MAINTENANCE AND INSPECTION OF THE LIFTING MAGNET
The user is obliged to maintain and service the lifting magnet in compliance with the specifications
in the operating manual and according to the country-specific standards and regulations
(e.g. ASME B30.20B, DGUV-Information 209-013; AMVO).
The maintenance intervals are classified according to the frequency with which the maintenance should
be carried out:
Before every use...
•check the lifting magnet for visible signs of damage
•clean the surface of the workpiece and the underside of the magnet
•free the underside of the magnet of rust, chips or unevenness
•check the blocking function of the safety tab on the lever
Weekly...
•check the lifting magnet and load hook for deformation, cracks or other defects
•check that the operating lever and safety tab are working properly
•check the load hook for damage or wear and have it replaced if necessary
•check the underside of the magnet for scratches, pressure points or cracks and have the magnet
repaired by the manufacturer if necessary
Monthly...
•check the markings and labelling on the lifting magnet for legibility and damage and replace if necessary
Annually...
•have the load-bearing capacity of the lifting magnet checked by the supplier or an authorized workshop
An annual inspection is recommended for the safe use of this lifting magnet.
We will be glad to perform this inspection for you in-house.
Please send us an email to:
[e-mail]
You will then promptly receive an oer and have the assurance that the lifting magnet will be inspected
in a process-reliable manner where it was actually produced.
Unauthorized repairs or modification to the lifting magnet are not permitted.
Please contact the manufacturer if you have any questions or queries.
!

17
DETAILED PERFORMANCE DATA FOR THE TML  LIFTING MAGNET
Values for load capacity are based on material S235 JR for the maximumcomparable to AISI 1020 Cold
Rolled Steel with the maximum, vertical breakaway force at 0° deviation from the load axis and additionally
under a 6° inclined load in accordance with EN13155, in each case with a 3:1 safety factor. There are not
instructions for round material, as the TML 250 is optimised for flat material and round material or arched
objects may not be lifted.
Table 2
The maximum dimensions of the loads to be lifted depend to a large extent on the geometry and resistance
to bending of the workpieces, since an air gap forms under the magnetic surface if the workpiece bends,
thus significantly reducing the load-bearing capacity.With each lifting operation, watch for any deformation
of the workpiece that might occur and, if necessary, check for any air gap developing at the edges of the TiN-
coated magnetic surface (e.g. with a sheet of paper; 80g/m2). Spreader bars with additional magnets may
be required to safely lift large or flexible loads.
Immediately stop the lift if there is any excessive
deformation or an air gap.
!
Never exceed the dimensions and/or the load-bearing
capacity of the material thickness given in the table 2.
!
Unauthorized repairs or modification to the lifting magnet are not permitted.
Please contact the manufacturer if you have any questions or queries.
Load capacity in kg
Thickness of material
Clean, flat,
ground surface Rusty, slightly scratched surface Irregular, rusty or rough surface
Air gap <0.1 mm Air gap =0.25 mm Air gap =0.5 mm
mm 0° 6° 0° 6° 0° 6°
250 45 40 35 32 30
390 80 80 70 65 60
4145 130 110 100 90 80
5180 165 135 125 100 90
6205 185 155 140 105 95
8240 220 165 150 110 100
10 250 230 180 165 110 100
15 250 230 180 165 115 105
>20 250 230 180 165 115 105
Tragfähigkeit in lbs
Thickness of material
Clean, flat,
ground surface Rusty, slightly scratched surface Irregular, rusty or rough surface
Air gap <0.004 inch Air gap = 0.01 inch Air gap = 0.02 inch
inch 0° 6° 0° 6° 0° 6°
0.08 110 100 85 75 70 65
0.12 200 185 175 160 140 125
0.16 315 290 240 220 200 180
0.20 400 365 295 270 220 200
0.25 455 415 340 310 231 210
0.30 530 485 360 330 240 220
0.40 550 515 395 360 240 220
0.50 550 515 395 360 250 230
>1 550 515 395 360 250 230

18
EC DECLARATION OF CONFORMITY AS DEFINED BY THE MACHINERY
DIRECTIVE //EC
We,
Alfra GmbH
2. Industriestr. 10
68766 Hockenheim/Germany
hereby declare that the switchable permanent magnet-type lifting magnet TML 250
according to the serial number on your product control card
complies with the following standards:
EN ISO 12100:2010
EN 13155:2003+A2:2009
This certificate is no longer valid if the product is modified without the manufacturer's consent. Furthermore,
this certificate is no longer valid if the product is not used properly in accordance with the use cases
documented in the user manual or if regular maintenance is not carried out in accordance with this manual
or country-specific regulations.
Person authorised to compile the documents:
Alfra GmbH
2. Industriestr. 10
68766 Hockenheim/Germany
Hockenheim/Germany, 15.11.2019
Markus A. Döring
(Managing Director)
Markus A. Döring
(Managing Director)