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Winch Drives
MOBILEX GFT-W
Gear Technology
Contents Page
Fields of Application, Description,
Gearing, Lubrication, Motors
Options, Backstop, Limit Switches,
End Supporting Bearing, Cable Drum, Winch Frame 3
2
Application Conditions, Gearbox Design,
Driver Groups and Service Time Categories,
Fleet Angle, Brake, Gearbox Selection 4
Classification Examples 5
Dimensions and Technical Data
for Output Torques of between:
9500 Nm and 18000 Nm 6
26000 Nm and 42500 Nm 8
67000 Nm and 100000 Nm 10
Fixed-Displacement Motors 12
Variable-Displacement Motors 13
End Supporting Bearing 14
Special Features
- Compact, space-saving
planetary gearbox design
- Planet wheel carried in
full-complement bearings
- Robust bearing system absorbing the
forces exerted by the cable pull
- Simple mounting
- Easy oil change
- Integrated multi-disk holding brake
- Low-noise operation
Winch Drives for Rope Pull Forces from 50 - 595 kN
MTSHydraulics & Automation
Description
MOBILEX GFT-W hydrostatic winch drives are ideal
drive components for winches. They have proven their
worth in the most arduous applications and under tough
operating conditions. MOBILEX GFT-W winch drives are used
in all kinds of winches - mobile and crawler cranes, railroad
cranes, shipboard, dockside and container cranes. Due to
their extremely compact design, the gear units can be mounted
inside the cable drum in a space-saving manner. They are
designed for ease of installation and maintenance. High-quality
manufacturing processes and the use of case-hardened gear-
wheels as well as quenched, tempered and surface-hardened
ring gears warrant outstanding load-carrying capacity,
operational safety and low-noise running characteristics.
The teeth of the gearwheels are designed according to
standard specifications and our own strength calculations,
which have been developed based on our comprehensive
know-how and are optimally adapted to our manufacturing
processes. The drives provide optimum total efficiency due
to the use of Rexroth hydraulic motors, among other things.
The gear units described in this document are subject to
constant updating and technical advancement. To suit the
specific needs of our customers in terms of dimensions and
output characteristics, further variants can be supplied.
That's why we provide advice and support even in the project
stage to help you find the most appropriate solution for your
requirement.
Lubrication
The gears and bearings are splash-lubricated. The drive units
are maintenance-free save for periodic oil changes, which are
convenient to make. Only the oils specified in the operating
manual should be used in the gearboxes.
The change intervals for different operating conditions are also
specified in the operating manual.
Brake
A spring-loaded, hydraulic released multiple-disk parking brake
arranged on the input side is provided.
TBr sta. min = 1,6 • T1 (input torque)
The multiple-disk holding brake is not a service brake,
but a static holding brake. Where required, a service or
emergency brake should be provided by the equipment sup-
plier/ operator.
The static holding torque multiplies in accordance with the
transmission ratio selected.
Hydraulic Motors
The gearbox is designed for direct flange-attachment of a
variable or fixed-displacement motor (preferably a Rexroth
hydraulic motor). If requested, the motor is supplied with the
gearbox.
2/16 Winch Drives GFT-W
Options
Upon request, the drives can be equipped with the following
accessories:
Backstop
Some winch drives (type 8000) can be supplied with a back-
stop arranged between the gearbox and the holding brake.
Function - Load lifting: Holding brake applied
Backstop freewheeling
Function - Load lowering: Backstop in engagement mode
Holding brake off
Thanks to modern hydraulic control features, these backstops
provide the same functionality as the more maintenance-
intensive mechanical backstops.
End Supporting Bearing, Cable Drum, Winch Frame
In addition to the standard scope of supply (Representation A),
complete winch drives series can be supplied with:
end supporting bearing (Representation B)
end supporting bearing and cable drum
end supporting bearing, cable drum, and winch frame.
Limit Switches
Upon request, special end supporting bearings can be
designed to connect to specific geared cam-type limit
switches.
Type 6000
Type 6000 permits two gear units to be mounted in one drum.
GFT 0013 W2
GFT 0017 W2
GFT 0017 W3
GFT 0024 W3
GFT 0026 W2
GFT 0036 W3
GFT 0040 W2
GFT 0050 W3
GFT 0060 W3
GFT 0080 W3
GFT 0110 W3
GFT 0160 W3
GFT 0220 W3
GFT 0330 W3
Type/Design
GFT-W
9500
14000
14000
19000
18000
26000
27000
37500
42500
67000
100000
140000
200000
275000
Output Torque 1)
T 2 max
Nm
16.3 -37.6
26.4 - 45.4
77.9 - 102.6
90.1 - 137.2
42.9 - 62
67 - 138.8
35.9 - 59.1
84.2 - 146.4
63.8 - 169.9
61.3 - 185.4
79.5 - 173.9
161.8 - 251
97.9 - 293
168.9 - 302.4
Transmission Ratio
i
50
67
74
99
84
118
108
150
164
231
300
373
471
595
Cable Pull, max. 2)
kN
Overview of GFT-W Winch Drives
For our current range of GFT-W winch drives, visit us at
www.pohuhydraulics.com
Should you require a specific winch drive solution that is
not covered by our standard range, please contact us.
Further dimensions and design variants can be supplied.
1) Design to FEM L2T5M5
2) Based on a theoretical 1st layer winding diameter Dws
3 /16Winch Drives GFT -W
Service time category
Assumed average service time per day in hours
Theoretic service life in hours
Collective Load Class
Co
llective
gro
up
s
L 1
L 2
L 3
L 4
light
medium
heavy
veryheavy
maximum loads occuring inexceptional cases only,slight loads constantly
small, medium and maximumloads about equally distribu-ted over service time
loads always near maximum
always maximum loads
T 2
0,25 - 0,5
400 -800
T 3
0,5 - 1
800 -1600
T 4
1 - 2
1600 -3200
T 5
2 - 4
3200 -6300
T 6
4 - 8
6300 -12500
T 7
8 - 16
12500 -25000
T 8
>16
25000 -50000
Driver Group with K Factor
M 1
0,90
M 2
0,90
M 3
0,90
M 4
0,90
M 5
0,95
M 6
1,05
M 7
1,2
M 2
0,90
M 3
0,95
M 4
0,95
M 5
1
M 6
1,15
M 7
1,30
M 8
1,50
M 31,05
M 41,05
M 51,10
M 61,25
M 71,40
M 81,60
M 81,80
M 41,25
M 51,30
M 61,45
M 71,65
M 81,85
M 82,10
M 82,40
Driver Groups and Service Time Categories to FEM, Section I, 3rd Issue 1987(FEM: Fédération Européenne de la Manutention)
Gearbox Selection
• T2 = output torque
F = cable pull in N
DW = relevant winding diameter in m
• T2K = corrected output torque
K factor according to the service time category and
collective group given in the table.
• T2 K of the gearbox to be selected must be � T2 max (accord-
ing to the bulletin).
See also Gearbox Design.
See page 17 for a data sheet relating to the winch drive de-
sign.
T2 =F • DW
2
T2 K = T2 • K
Application Conditions
The gearboxes have been designed for use at ambient temper-
atures of between -20° C and +40° C. Environmental influenc-
es such as salt water, salty air, sand, dust, overpressure, heavy
vibrations, extreme shocks and ambient temperatures, aggres-
sive media, etc. will affect the function of the product.
Such influences must be specified to ensure that the winch
drive is designed to safely meet the requirements.
Gearbox design
The gearbox design is based on many years of practical experi-
ence. The maximum output torques T2 zul indicated under Tech-
nical Data relate to FEM Section 1,3rd issue, and Section IX
(FEM - Fédération Européene de la Manutention), as well as
DIN 15020, collective load class L2, service time category T5
corresponding to driver group M5. The reference output speed
is 25 revolutions per minute maximum.
If the winch is classified into a different driver group, the re-
quired output torque must be converted by applying factor K
(see table).
This results in the maximum permissible output torque for the
new classification. Whether or not the selected overall classifi-
cation is feasible, will be determined by the specialists of
Pohu Drive System.
The output torques indicated are peak torques that are permis-
sible for short-term operation only (e.G. unloaded hook, emer-
gencies, etc.) The gear units are not designed for continuous
operation.
�min. �max.
The fleet angle � should not be small-
er than 0.5° to make sure that the
cable does not climb the drum flange
and properly forms the next layer.
The fleet angle � should not be larger
than 1.5° to make sure that the cable,
when in the first layer, is not pulled
against the groove wall and that, in
the case of several cable layers, the
cable winds neatly over the full length
of the drum to drum flanges.
Fleet Angle
Observing the admissible fleet angle � is prerequisite for prop-
er cable winding.
4/16 Winch Drives GFT-W
Type of Crane
(Designation)
Component
Operated 1) Hoisting Swinging Level
Luffing
Trolley
Travelling
Crane
Travelling
Erection cranes
Loading bridges
Loading bridges
Workshop cranes
Overhead travelling cranes, ram
cranes, scrap yard cranes
Unloading bridges, container gantry
cranes
hook
grab or magnet
grab or magnet
hook or spreader
Type of Driver
M 2 – M 3
M 5 – M 6
M 7 – M 8
M 6
M 8
M 6 – M 7
M 2 – M 3
M 4
M 6
M 4
M 6
M 5 – M 6
M 1 – M 2
–
–
–
–
M 3 – M 4
M 1 – M 2
M 4 – M 5
M 6 – M 7
M 4
M 6 – M 7
M 6 – M 7
M 2 – M 3
M 5 – M 6
M 7 – M 8
M 5
M 7 – M 8
M 4 – M 5
Other gantry cranes
(with trolley and/or live ring)hook M 4 – M 5 M 4 – M 5 – M 4 – M 5 M 4 – M 5
Unloading bridges, container gantry
cranes (with trolley and/or live ring)grab or magnet
Berth cranes, shipyard cranes,
dismantling cranes
Dockside cranes (slewable, gantry
type, ...), floating cranes, floating
sheerlegs
Dockside cranes (slewable, gantry
type, ...), floating cranes, floating
sheerlegs
Floating cranes and floating sheerlegs
for very high loads (normally above
100 t)
Shipboard cranes
Shipboard cranes
Tower cranes for construction sites
Derrick tower gantry
Railroad cranes, approved for service
in trains
hook
hook
grab or magnet
hook
grab or magnet
M 8
M 5 – M 6
M 6 – M 7
M 7 – M 8
M 3 – M 4
M 4
M 5 – M 6
M 4
M 2 – M 3
M 3 – M 4
M 5 – M 6
M 4 – M 5
M 5 – M 6
M 6 – M 7
M 3 – M 4
M 3 – M 4
M 3 – M 4
M 5
M 1 – M 2
M 2 – M 3
M 3 – M 4
M 4 – M 5
M 5 – M 6
M 6 – M 7
M 3 – M 4
M 3 – M 4
M 3 – M 4
M 4
M 1 – M 2
M 2 – M 3
M 7 – M 8
M 4 – M 5
–
–
–
M 2
M 4 – M 5
M 3
–
–
M 4 – M 5
M 5 – M 6
M 3 – M 4
M 4 – M 5
–
M 3
M 3 – M 4
M 3
–
–
1) This column only shows some typical areas of winch use for informative purposes.
Vehicle-mounted cranes hook M 3 – M 4 M 2 – M 3 M 2 – M 3 – –