Wittenstein Alpha VDT+ Series User manual

2022-D005924 Revision: 11
V-Drive+/V-Drive economy
VDT+, VDS+, VDH+, VDSe, VDHe
Operating Manual

V-Drive+/V-Drive economy
2022-D005924 Revision: 11
Customer Service department
WITTENSTEIN alpha GmbH
Walter-Wittenstein-Straße 1
D-97999 Igersheim
Germany
Deutschland WITTENSTEIN alpha GmbH [email protected] [phone]
Benelux WITTENSTEIN BVBA [email protected] [phone]
Brasil WITTENSTEIN do Brasil [email protected] [phone]
[email protected] [phone]
Österreich WITTENSTEIN GmbH offi[email protected] [phone]
Danmark WITTENSTEIN AB [email protected] [phone]
France WITTENSTEIN sarl [email protected] [phone]
Great Britain WITTENSTEIN Ltd. [email protected] [phone]
Italia WITTENSTEIN S.P.A. [email protected] [phone]
[email protected] [phone]
North America WITTENSTEIN holding Corp. [email protected] [phone]
España WITTENSTEIN S.L.U. [email protected] [phone]
Sverige WITTENSTEIN AB [email protected] [phone]
Schweiz WITTENSTEIN AG Schweiz [email protected] [phone]
[email protected] [phone]
Türkiye WITTENSTEIN Güç Aktarma
Sistemleri Tic. Ltd. Şti. [email protected] [phone]
© WITTENSTEIN alpha GmbH 2019
Subject to technical and content changes without notice.

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1 Contents
1 Contents 1
1.1 Service Contact 2
2 General Information 2
2.1 Description, Designations 2
2.2 Whom does this manual concern? 2
2.3 Which signs and symbols are
referred to in this manual? 2
2.4 Exclusion of liability 2
2.5 Modifications, Reconstructions 2
2.6 EC Machinery Directive 2
2.7 Technical Modifications 2
2.8 Copyright 2
3 Safety 3
3.1 Intended Use 3
3.2 Improper Use 3
3.3 Safety Instructions 3
3.3.1 General Safety Instructions 3
3.4 Tightening Torques 4
3.5 In case of fire 4
3.5.1 Suitable extinguishing agents,
Protective equipment 4
3.5.2 Unsuitable extinguishing
agents 4
3.5.3 Additional Information 5
4 Technical Specifications 5
4.1 Design 5
4.1.1 “VDT+” with output flange 5
4.1.2 “VDS+” with output shaft 5
4.1.3 “VDS+“ with output shaft
on both sides 6
4.1.4 “VDSe“ with output shaft 6
4.1.5 “VDSe“ with output shaft
on both sides 6
4.1.6 “VDH+/VDHe” with hollow
output shaft 6
4.2 Weight 6
4.3 Quantity of lubricant and types 6
4.3.1 Lubricant quantities
VDT+, VDS+ und VDSe 7
4.3.2 Lubricant quantities VDH+,
VDS+ with output shaft on
both sides and VDHe 7
4.4 Performance Statistics 8
4.5 Noise emission 8
4.6 Identification Plate 8
4.7 Ordering Key 8
5 Delivery Status, Transport,
Storage 9
5.1 Delivery Status 9
5.2 Transport 9
5.2.1 Transport using hoisting
equipment 9
5.3 Storage 9
6 Mounting, Putting into
Operation 10
6.1 Preparation 10
6.2 Mounting the Motor 10
6.2.1 General Information 10
6.2.2 Tools for tightening the
clamping hub 10
6.2.3 Assembly 11
6.3 Mountings on the gear
output side 12
6.3.1 Mountings on the output
flange (version VDT+) 12
6.3.2 Mountings on the output
shaft (version VDS+/VDSe,
VDS+/VDSe with output
shaft on both sides) 12
6.3.3 Assembly on the hollow
shaft with shaft key (version
VDH+/VDHe with groove) 13
6.3.4 Mounting on the hollow output
shaft with shrink disk (version
VDH+/VDHe smooth) 13
6.3.5 Mounting the gearbox
onto your machine 15
6.4 Putting into operation 16
6.5 Changing the torsional flank
backlash (optional) 16
7 Operation 16
7.1 Operating conditions 16
8 Maintenance 17
8.1 Shutdown, preparation 17
8.2 Inspection schedule 17
8.3 Maintenance Work 17
8.3.1 Visual Inspection 17
8.3.2 Checking the tightening
torques 17
8.3.3 Oil change 18
8.4 Start-up after maintenance work 20
8.5 Malfunction list (troubleshooting) 20
9 Dismantling 20
9.1 Preparation 20
9.2 Disassembling the gearbox 20
9.2.1 Dismantling of a slip-on gear
mechanism with feather key 21
9.2.2 Dismantling of a slip-on
gear mechanism with
shrinkable disk 21
9.3 Disassembling the motor 22
10 Disposal 22
10.1 Lubricants 22
10.2 Sealing rings 22
10.3 Metal 22
11 Appendix 23
11.1 Tightening torques for common
thread sizes in
general mechanics 23
11.2 Setting the torsional flank
backlash 23

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1.1 Service Contact
Please contact our Customer Service Department if you have any technical questions:
WITTENSTEIN alpha GmbH
Customer Service
Walter-Wittenstein-Str. 1
D-97999 Igersheim
Tel.: [phone]
Fax: [phone]
E-Mail: [e-mail]
2 General Information
If this manual is supplied with an amendment (e.g. for special applications), then the
information in the amendment is valid. Contradictory specifications in this manual thereby
become obsolete.
The original instructions were prepared in German; all other language versions are
translations of these instructions.
2.1 Description, Designations
The low-backlash angle gear V-Drive+/V-Drive economy, hereafter referred to as gearbox, is
installed in the “T” (output flange), “S” (output shaft) and “H” (hollow output shaft) versions.
2.2 Whom does this manual concern?
This manual concerns all persons who install, operate, or maintain this gear reducer.
They may only carry out work on the gear reducer, if they have read and understood this
operating manual. Please pass the safety instructions on to other persons as well.
2.3 Which signs and symbols are referred to in this manual?
 An “action instruction”, which requires you to carry out an action.
∇ With a “check” you can specify whether the device is ready for the next work stage.
 A “usage tip” shows you an option of facilitating or improving operations.
The safety instructions symbols are described in section 3 “Safety”.
2.4 Exclusion of liability
The manufacturer does not accept liability for damage or injury ensuing from improper
handling of the gear reducer.
2.5 Modifications, Reconstructions
Modifications or reconstructions of the gear reducer may only be carried out with the express
written authorisation of WITTENSTEIN alpha.
2.6 EC Machinery Directive
The gearbox is considered a "machine component" and is therefore not subject to the
EC Machinery Directive 2006/42/EC.
Operation is prohibited within the area of validity of the EC directive, until it has been
determined that the machine, in which this product is installed, corresponds to the
regulations within this directive.
2.7 Technical Modifications
WITTENSTEIN alpha reserves the right of carrying out technical modifications to improve
the product.
2.8 Copyright
© 2019, WITTENSTEIN alpha GmbH

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3 Safety
3.1 Intended Use
The gearbox is designed for use in machines and terotechnology. Please refer to our
catalogue or our Internet page for the maximum permitted torques and speeds:
www.wittenstein-alpha.de/en.
 Please consult our Customer Service Department (see 1.1) if your gearbox is older
than a year. In this way you receive valid data.
3.2 Improper Use
Every usage which exceeds the limits stated above (especially higher torques and speeds) is
not compliant with the regulations, and is thus prohibited.
The operation of the gear reducer is prohibited if:
• it was not mounted according to regulations (e.g., securing the motor),
• it was not installed according to regulations (e.g., securing screws),
• the gear reducer is very soiled,
• it is operated without lubricant.
3.3 Safety Instructions
The following symbols are used in this operating manual to warn you of hazards:
DANGER!
This symbol warns you of danger of injury to yourself and others.
Attention
This symbol warns you of the risk of damage to the gear reducer.
Environment
This symbol warns of environmental pollution risk.
In addition to the safety specifications mentioned in this operating manual, the general and
also the local regulations on the prevention of accidents (for instance, personal safety
equipment) and on environmental protection should be observed.
3.3.1 General Safety Instructions
Working on the gearbox
DANGER!
Inappropriately executed work can lead to injury and damage.
 Make sure that the gearbox is only installed, maintained, and dismantled by trained
technicians.
DANGER!
Foreign bodies spinning through the air can cause grave injury.
 Before putting the gearbox into operation, check that there are no foreign bodies or tools
near the gearbox.
Operation
DANGER!
Touching hot surfaces can lead to burns.
 Do not touch the gearboxes if their operating temperatures are too high, or use suitable
safety equipment (e.g. gloves).
DANGER!
A damaged gearbox can cause accidents and injury.
 Never use a gearbox that has been overloaded to due misuse or a machine accident
(see chapter 3.2 „Improper Use“).
 Replace the affected gearbox, even if no external damage is visible.

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DANGER!
Rotating machinery can lead to injury. There is danger of being trapped or pulled in!
 Keep a sufficient distance to rotating machinery.
Maintenance
DANGER!
An unintentional start of the machine during maintenance work can lead to serious accidents.
 Make sure no one can start the machine while you are working on it.
 Secure the machine against restarting and unintentional movements during assembly
maintenance work.
DANGER!
Even a brief running of the machine during maintenance work can lead to accidents if the
safety devices are not operating.
 Make sure that all safety devices are mounted and active.
Lubricants
DANGER!
Extended, intensive contact with synthetic oils can lead to skin irritations.
 Avoid extended contact with oil, and clean oil off skin thoroughly.
DANGER!
Hot oil may cause scalding.
 When changing oil, protect yourself against contacting hot oil.
Attention
Mixing different lubricants can impair the lubricant properties. This can destroy the gearbox.
 Only re-fill with the lubricant type that is in the gearbox.
 If you wish to use another lubricant, carry out a complete oil change (with flushing).
Environment
Lubricants (oils and greases) are hazardous substances, which can contaminate soil and
water.
 Collect drained lubricant into suitable receptacles and dispose of it according to the valid
national guidelines.
3.4 Tightening Torques
All screwed connections for which a tightening torque is specified, must on principle be
tightened with a calibrated torque wrench, and checked.
3.5 In case of fire
The gearbox itself is not combustible. However, it usually contains a synthetic gear oil
(polyglycol).
 Please observe the following instructions, if the gearbox is situated in a burning
environment.
3.5.1 Suitable extinguishing agents, Protective equipment
Carbon dioxide, powder, foam, fog
DANGER!
High temperatures produce irritating steam.
 Use a protective breathing apparatus.
3.5.2 Unsuitable extinguishing agents
Do not spray with water!

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3.5.3 Additional Information
Environment
 Prevent the penetration of the lubricant into drains, sewers, and water resources.
You can receive further information on the lubricants directly from the manufacturer:
Standard lubricant
OPTIGEAR SYNTHETIC 800/220
(formerly TRIBOL)
Lubricants for the food industry
(NSF-H1 registered)
Castrol Industrie GmbH, Mönchengladbach
Tel.: [phone]
www.castrol.com
Klüber Lubrication München KG,
München
Tel.: [phone]
www.klüber.com
Table 3.1
4 Technical Specifications
4.1 Design
The gearboxes are comprised of low-backlash angle gears.
All gearboxes are factory-filled with oil; gear input and output sides are sealed with radial
shaft sealings.
The clamping hubs enable a quick and easy mounting of the motor:
The motor is centred on the gearbox axle using the bearing-supported clamping hub
and not the adapter plate. The motor can thus be mounted without radial distortion.
High flexibility is assured by being able to adapt the reducer to various motors through the
functions of adapter plate and the spacer sleeve.
The gearbox has been designed to compensate for thermal linear expansion of the motor
shaft.
For varying applications, the gearbox is available with:
• Output flange “VDT+”,
• Output shaft “VDS+/VDSe” and
• Hollow output shaft “VDH+/VDHe”.
4.1.1 “VDT+” with output flange
Fig 4.1
The output flange, in accordance with ISO 9409, has two
centring mechanisms and a bore hole for an indexing pin so
that the gearbox (or the application) can be zeroed
mechanically.
The hollow shaft running through serves as a conduit for lines
or hoses, but does not aid in securing the load. On the back
side of the output flange, the position and/or the speed of the
load can be measured through the hollow shaft.
4.1.2 “VDS+” with output shaft
Fig 4.2
The output shaft is available in the following forms:
• Smooth face,
• With feather key groove (according to DIN 6885) or
• Involute (according to DIN 5480).

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4.1.3 “VDS+“ with output shaft on both sides
The output shaft is available in the following forms:
• Smooth face or
• With groove for a feather key (according to DIN 6885).
4.1.4 “VDSe“ with output shaft
The output shaft is available in the following forms:
• Smooth face or
• With groove for a feather key (according to DIN 6885).
4.1.5 “VDSe“ with output shaft on both sides
The output shaft is available in the following forms:
• Smooth face or
• With groove for a feather key (according to DIN 6885).
4.1.6 “VDH+/VDHe” with hollow output shaft
Fig 4.3
The output shaft is available in the following forms:
• Smooth face or
• With groove for a feather key (according to DIN 6885).
For the load shaft, we recommend the tolerance h6
(DIN ISO 286). The material must have a minimum yield
stress of 385 N/mm².
4.2 Weight
The weight of the gearbox ranges from 4 to 62 kg.
 The tables in section 5.2 help you in a more exact specification of the weights.
4.3 Quantity of lubricant and types
 Please observe the instructions in the “General Safety Instructions” in
section 3.3.1 .
All gearboxes are filled by the manufacturer with synthetic gear oil of viscosity class
ISO VG 220.
The following table specifies all permitted oils of the viscosity class ISO VG 220. You can find
additional information from the manufacturer at the specified Internet addresses.
Manufacturer Lubricant Internet address
Castrol OPTIGEAR SYNTHETIC 800/220
(formerly: Tribol 800/220)
www.castrol.com
Fuchs Renolin PG 220 www.fuchs-oil.de
Klüber Klübersynth GH 6-220 www.klueber.com
Table 4.1
The filled lubricant and the required lubricant quantities are specified on the identification
plate. These apply for the mounting position stated with the order.
 Correct the lubricant quantity, if required, according to the following tables.
The ambient temperature may not be under -15 °C and not over +40 °C. Operating
temperature may not exceed +90 °C.
Divergent operating conditions may make different lubricant quantities and different
lubricants necessary.
 In these cases, please consult our Customer Service Department (see 1.1).

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You can find the lubricant quantities for your gearbox in the following sections. Please note
the design version (e.g. VDT+), the size (e.g. 050) and the mounting position (e.g. AC)
of the gearbox.
4.3.1 Lubricant quantities VDT+, VDS+ und VDSe
Lubricant quantities [cm3]
Mounting position
Size
040 050 063 080 100
VDSe VDT+/
VDS+ VDSe VDT+/ VDS+ VDSe VDT+/ VDS+
VDT+/
VDS+
AC BC 270 600 500 900 800 2300 4500
AD BD 120 300 300 500 500 1200 2700
AE BE 270 500 500 900 800 2000 4200
AE BE 270 500 500 900 800 2000 4200
AF BF 270 600 500 900 800 2500 5700
AG BG 270 600 500 900 800 2500 5700
Table 4.2
4.3.2 Lubricant quantities VDH+, VDS+ with output shaft on both sides and VDHe
Lubricant quantities [cm3]
Mounting position Size
040 050 063 080 100
0C 270 500 800 2100 4400
0D 120 300 500 1200 2700
0E 270 500 800 2000 4200
0F 270 500 800 2300 5500
0G 270 500 800 2300 5500
Table 4.3

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4.4 Performance Statistics
Please refer to our catalogue or our Internet page for the maximum permitted torques and
speeds: www.wittenstein-alpha.de/en.
 Please consult our Customer Service Department (see 1.1) if your gearbox is older
than a year. In this way you receive valid data.
4.5 Noise emission
Depending on the gearbox type and product size, the continuous sound pressure level is up
to70 dB(A).
Please contact our Customer Service Department if you need information regarding your
particular product.
4.6 Identification Plate
Fig. 4.4
The following specifications can be found on
the identification plate:
A Ordering Key
B Ratio
C Article Code
D Serial number
E Lubricant
F Mounting position
G Lubricant quantity for the designated
mounting position
4.7 Ordering Key
Fig 4.5
.
A
WITTENSTEIN alpha GmbH - Walter-Wittenstein-Str.1 - 97999 Igersheim
Article Code: 20019045
Ratio: 40
Type: VDH 063-MF1-40 -141-0G
Serial No.: 1234567
Lubrication: Oil Castrol Tribol 800/220
Mounting Pos.: G 1000 ccm
Tightening Torques: Before Mounting See Operation Manual !
Lubrication: Oil Castrol Optigear Synthetic 800/220
B C D
EFG
Gearhead type
VDT= Flange
VDS= Solid shaft
VDH= Hollow shaft
Gearhead type design
e = economy (VDSe, VDHe)
Distance between axes
040, 050, 063, 080, 100
Gearhead variations
Gearhead model
VDH+/VDHe - Number of
shrink discs
Mounting position
Backlash
Clamping hub bore hole
diameter
Output shape
Ratios i
Number of stages
VDT _ 050 - M F 1 - 7 - 0 3 1 - AC 0

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5 Delivery Status, Transport, Storage
5.1 Delivery Status
The gearboxes are wrapped in foil (PE) and foamed (diphenylmethane) into the cardboard
box.
 Please dispose of packing material according to the valid national regulations.
All gearboxes are treated with an anti-corrosion agent at the gear input and output.
The gearboxes are filled with lubricant by the manufacturer.
5.2 Transport
No special direction or position is prescribed to transport the gearbox.
The tables shown below are designed to help you specify the weights of your gearbox.
The masses refer to the gearboxes with standard adapter plates and the least oil level. With
a different adapter plate and/or a different oil level, the actual mass can deviate by up to
10%.
Weight [kg]
Size 040 050 063 080 100
Version
VDT+ – 8.8 14.5 31 62
VDS+ – 8.5 15 32 61
VDSe 4.1 7.7 12.5 – –
VDH+ 4 7.4 12 26 50
VDHe 4 7.4 12 – –
Table 5.1
5.2.1 Transport using hoisting equipment
DANGER!
Falling loads or breakage of fastening equipment can cause injury.
 Do not stand under suspended loads.
 Keep as safe a distance as possible from securing equipment.
Attention
Falling or hard placement can damage the gearbox.
 Only use hoisting and securing equipment which is permitted for the size/weight of your
gearbox.
 Ensure that the load is slowly and carefully handled and placed.
Fig. 5.1
For gearboxes as of model V-Drive+/V-Drive economy 050,
there is an eyelet for securing equipment.
5.3 Storage
The gear reducer can be stored dry and in a horizontal position in the original packing for a
maximum of 2 years at a temperature between 0 °C and +40 °C. As storage logistic, we
recommend the “first in - first out” principle.

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6 Mounting, Putting into Operation
 Please observe the instructions in the “General Safety Instructions” in
section 3.3.1.
6.1 Preparation
All gearboxes are treated with an anti-corrosion agent at the gear input and output.
 Remove all traces of the anti-corrosion agent in all versions before mounting the
gearbox.
Attention
Pressurised air can damage the gearbox seals, and thus lead to leakage.
 Do not blow out the flanges with pressurised air when cleaning.
Fig. 6.1
In the gear unit housing are four threaded bores on each of
three surfaces (fig. 6.1).
 Use all threaded bores of one surface to secure the
gearbox to your machine.
Threaded bores in the gear unit housing
Gearbox
size
Bolt size Thread depth
[mm]
Property
class
Tightening
torque [Nm]
040 M 6 11.0 8.8 9
050 M 8 13.5 8.8 24
063 M 10 17.0 8.8 48
080 M 12 19.5 8.8 83
100 M 12 19.5 8.8 83
Table 6.1
6.2 Mounting the Motor
6.2.1 General Information
If the gearbox is not delivered with an attached motor, it is to be motor-mounted.
The motor to be mounted must:
• correspond to the B5 design,
• have a radial and axial runout tolerance of “N” according to DIN 42955 and
• if possible, have a smooth shaft.
Attention
Distortion can damage the motor and the gearbox.
 Ensure that the motor is mounted in a vertical position.
6.2.2 Tools for tightening the clamping hub
The clamping bolts M5 to M8 can be tightened through the mounting bores of the adapter
plate using a square ¼ inch socket spanner.
The M10 clamping bolt requires a square ⅜ inch socket spanner, the M12 clamping bolts
require a ½ inch socket spanner. In addition, calibrated torque wrenches are needed
for the respective torque range.

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6.2.3 Assembly
Smooth shaft with spacer sleeve Grooved shaft with spacer sleeve
Fig. 6.2
 If the motor shaft has a feather key, remove the feather key.
A clamping hub connects the motor shaft and the gear drive shaft. A slotted spacer sleeve is
additionally used for certain motor shaft diameters and applications (fig. 6.2).
 Clean the plane fitting surfaces of the motor and gearbox.
 Clean/de-grease the motor shaft, the clamping hub bore hole and, if required, the spacer
sleeve.
∇ Take care that the slot of the spacer sleeve is positioned coincident to the slot of the
clamping hub.
 Turn the clamping hub so that the clamping screws are positioned coincident to the
mounting holes in the adapter plate.
Attention
Excessively high axial forces can damage the motor and gearbox.
 Ensure that the axial forces that occur are not higher than the values specified
in Table 6.2.
Gearbox
size
Clamping hub
interior Ø
[mm]
Clamping screw
DIN EN ISO
4762-10.9
Width across
flats
[mm]
Tightening
torque
[Nm]
Max. axial
force
[N]
040 ≤ 14 M 5 4 8.5 42.5
050 ≤ 19 M 6 5 14 51
063 ≤ 28 M 8 6 30 49
080 ≤ 35 M 10 8 65 80
100 ≤ 48 M 12 10 115 118
Table 6.2
Attention
Motors with
• shaft shoulder,
• distinctive chamfer radius, or
• longer shafts than are permitted for the relevant gearbox
lead to distortions in mounting, which damage the motor and the gearbox.
 Check the interfering edges by measuring, or by a measurement check based on our
catalogue specifications and the information of the motor manufacturer.
 Please consult our Customer Service Department to obtain a wider adapter plate or an
intermediary flange.

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Fig 6.3
 Position the motor so that the plane
surfaces fit together. (fig. 6.3)
∇ Ensure that the motor allows itself to be
moved into position “easily”.
∇ There is to be no gap between the motor
and the gearbox.
 Smear threadlocker (e.g. Loctite®243) onto
the screws.
 Fasten the motor onto the adapter plate
with the screws. Evenly tighten the screws
crosswise with increasing torque.
 Turn the screw in the clamping hub to the tightening torque (see table 6.2).
 Press the supplied stopper plugs into the mounting bores of the adapter plate until they
are flush with the surface.
6.3 Mountings on the gear output side
 Thoroughly clean the output flange or shaft, centring, and fitting surface.
6.3.1 Mountings on the output flange (version VDT+)
The output flange, in accordance with ISO 9409, has two centring mechanisms and a bore
hole for an indexing pin so that the gearbox (or the application) can be zeroed mechanically.
The hollow shaft running through serves as a conduit for lines or hoses, but does not aid in
securing the load.
Attention
Distortions during mounting operations can damage the gearbox.
 Mount gearwheels and toothed belt pulleys onto the output flange without forcing.
 Do not on any account attempt an assembly by force or hammering.
 Only use suitable tools and equipment.
 You can find the prescribed tightening torques in the following table.
Thread in output flange
Gearbox
size
Quantity
x thread
Indexing
bore
hole Ø
Property
class
Tightening
torque
[Nm]
050 7 x M 6 6 H 7 10.9 14
063 11 x M 6 6 H 7 10.9 14
080 11 x M 8 8 H 7 10.9 34
100 11 x M10 10 H 7 10.9 67
Table 6.3
6.3.2 Mountings on the output shaft (version VDS+/VDSe, VDS+/VDSe with output shaft on both
sides)
The output shaft is available in the following forms:
• Smooth face,
• With feather key groove (according to DIN 6885) or
• Involute (according to DIN 5480) (only VDS+).
Attention
Distortions during mounting operations can damage the gearbox.
 Mount gearwheels and toothed belt pulleys onto the output shaft without forcing.
 Do not on any account attempt an assembly by force or hammering.
 Only use suitable tools and equipment.
 When shrink-fitting a gear onto the output shaft: Ensure that the maximum static
axial forces (table 6.4) are not exceeded.

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Output shaft
Gearbox
size
Famax [N]
040 6500
050 10750
063 18500
080 31250
100 49750
Table 6.4
6.3.3 Assembly on the hollow shaft with shaft key (version VDH+/VDHe with groove)
The shaft end of the machine must be equipped with a DIN 6885 Part 1, Form A shaft key
and must have a DIN 332 Form DS centering (with thread).
∇ Check the hollow and load shafts for damaged edges or poor fit. Re-machine the parts if
necessary and clean them.
 Protect the cleaned contact surfaces against rust with a suitable lubricant (e.g. Klüger
Altemp Q paste).
Attention
Incorrectly aligned shafts can lead to damage.
 Ensure that the hollow shaft is aligned with the load shaft.
Fig. 6.4
 The axial securing of the hollow shaft
gearbox to the load shaft (A) can be made
with an end washer (B) and a retaining
ring (C).
 If the end washer is to be used for
dismantling as a forcing washer, the load
shaft (A) may not exceed a certain insertion
length (L 31) in the hollow shaft (D). The
maximum insertion lengths are specified in
the following table.
Gearbox size Maximum insertion length L 31 [mm]
040 64
050 77
063 89
080 119
100 159
Table 6.5
6.3.4 Mounting on the hollow output shaft with shrink disk (version VDH+/VDHe smooth)
The hollow shaft is axially secured to the load shaft by means of a shrink disk connection.
The shrinkable disk is delivered ready to be installed.
 If a different shrink disk is used, observe the instructions of the manufacturer.
 The material of the shrink disk is specified in the article code (AC) (see Table 6.7).

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Depending on the material of the shrink disk, the load shaft has to meet the following
conditions:
Material of the shrink disk
Standard Nickel-
plated
Stainless steel
Minimum yield stress [N/mm²] ≥ 385 ≥ 260 ≥ 260
Surface roughness Rz [μm] ≤ 16
Tolerance h6
Table 6.6
Attention
Dirt can inhibit transmission of the torque.
 Do not disassemble the shrink disk prior to installation.
 De-grease the load shaft and the hollow output shaft's bore leaving no residual traces in
the area of the shrink disk seat.
 Only the exterior surface of the hollow output shaft may be greased in the area of the
shrink disk seat.
Attention
The forces of the shrink disk can deform the hollow output shaft.
 Always install the load shaft first before tightening the clamping screws of the shrink disk.
 Push the hollow output shaft onto the load shaft by hand.
Attention
Incorrectly aligned shafts can lead to damage.
 Ensure that the hollow output shaft is aligned with the load shaft.
Fig. 6.5
 Mount the hollow output shaft onto the load shaft using a
nut (A) and a threaded spindle (B). The supporting (C)
has to be performed by the hollow output shaft.
Fig. 6.6
The article code is located, depending on the design, on the
front side or the circumference of the shrink disk.
 Refer to the article code to determine the material of the
shrink disk.
 Tighten the clamping screws (D) of the shrink disk evenly
distributed in multiple circular passes.
 Tighten the individual clamping screws only up to the
maximum permitted tightening torque.
 For screw sizes and specified tightening torques, see
Table 6.7.
Material of the shrink disk: Standard
Gearbox size
V-drive
Article code
(AC)
Tightening
torque
Clamping screw thread
040 20001389 12 Nm M6
050 20020687 13 Nm M6
063 20020688 30 Nm M8
080 20020689 34 Nm M8
100 20020690 34 Nm M10

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Material of the shrink disk: Nickel-plated
Gearbox size
V-drive
Article code
(AC)
Tightening
torque
Clamping screw thread
040 20047957 7.5 Nm M6
050 20047934 14 Nm M6
063 20047530 34 Nm M8
080 20047935 34 Nm M8
100 20047927 34 Nm M10
Material of the shrink disk: Stainless steel
Gearbox size
V-drive
Article code
(AC)
Tightening
torque
Clamping screw thread
040 20043198 7.5 Nm M6
050 20047885 6.8 Nm M6
063 20035055 16 Nm M8
080 20047937 16 Nm M8
100 20047860 16 Nm M10
Table 6.7
∇ Check twice in a row that the clamping screws (D) have the maximum tightening torque.
 For installing a shrink disk (supplied separately), see Chapter 9.2.2.
6.3.5 Mounting the gearbox onto your machine
 Please observe the instructions in the „General Safety Instructions” in section
3.3.1.
Check the lubricant quantity
The gearboxes are compliant for every mounting position; the lubricant quantity, however, is
dependent on the mounting position.
The filled lubricant and the required lubricant quantities are specified on the identification
plate. These apply for the mounting position stated with the order.
 Correct the lubricant quantity, if required, according to the tables in section 4.3.
Mounting the gearbox
Mounting and connecting structures must be designed so that no vibrations from adjacent
machinery parts and components are transmitted.
 Coat the four screws with screw-bonding agent (e.g. Loctite 221), and screw the gear
unit housing and your machine together.
 You can find the prescribed screw sizes and tightening torques in table 6.1.

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6.4 Putting into operation
 Please observe the instructions in the „General Safety Instructions” in section
3.3.1.
When using the gearbox in continuous duty operation (S1
operation), we recommend the use of a ventilation screw.
 The ventilation screw is not included in the scope of delivery.
WITTENSTEIN alpha GmbH offers suitable ventilation screws to
this end (see Table 6.8). If you would like to order a ventilation
screw, contact our sales department.
Ventilation screw
V-Drive gearbox size 040 050 063 080 100
Material number for
ventilation screw
20070677 20071468
(only with ordering code
xxx040x-xxx-xxx-xxx-xx-XDx)
20070677
Thread size G1/4" G3/8" G1/4"
Table 6.8
6.5 Changing the torsional flank backlash (optional)
For special applications, there is the option of changing the torsional flank backlash.
 The procedure for setting the torsional flank backlash can be found in the
appendix: section 11.2.
7 Operation
7.1 Operating conditions
 Please observe the instructions in the „General Safety Instructions” in section
3.3.1.
The gearbox must be installed in a clean and dry environment. Coarse dust and liquids of all
kinds impair its function.
The specifications for lubricants and operating temperatures can be found in section 4.3.
 Avoid icing, which can damage the seals.
Divergent operating conditions may make different lubricant quantities and different
lubricants necessary.
 In these cases, please consult our Customer Service Department (see 1.1).
DANGER!
Excessive loads or impacts can cause the output flange/output shaft to tear off.
Falling loads or breakage of machine parts can cause injury.
 Comply with the maximum permitted forces and torques.
 Do not stand under suspended loads.

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Gearbox size Maximum permitted forces
Max. axial force [N] Maximum radial force [N]
040 3000 2400
050 5000 3800
063 8250 6000
080 13900 9000
100 19500 14000
Table 7.1
Gearbox size
Maximum permitted EMERGENCY-STOP torque [Nm]
Ratio i
4 7 10 16 28 40
040 118 126 125 129 134 122
050 230 242 242 250 262 236
063 460 484 491 494 518 447
080 938 993 963 1005 1064 941
100 1819 1932 1940 1955 2073 1856
Table 7.2
8 Maintenance
8.1 Shutdown, preparation
 Please observe the instructions in the „General Safety Instructions” in section
3.3.1.
 Shut down the machine in which the gearbox is installed.
 Disconnect the machine from the mains, before starting maintenance work.
8.2 Inspection schedule
Maintenance work/
See section...
Maintenance periods
At start-up
After 500
operating
hours or
3 months
Every 3
months Yearly
Visual inspection/8.3.1 X X X
Checking the tightening
torques/8.3.2 X X X
Oil change/8.3.3 Recommendation: initially after 7,000 operating hours and
every 10,000 operating hours thereafter
(after 5 years at the latest)
Table 8.1
8.3 Maintenance Work
8.3.1 Visual Inspection
 Check the entire gear reducer by carrying out a thorough visual inspection for exterior
damage and oil leakage.
 The sealings are subject to wear. Therefore also check the gear reducer for leakage
during each visual inspection.
8.3.2 Checking the tightening torques
Check the tightening torques of the fastening bolts on the gear unit housing.
 You can find the prescribed tightening torques in the table 6.1 in section 6.
 Check the tightening torque of the clamping bolts on the motor mounting.
 You can find the prescribed tightening torques in the table 6.2 in section 6.

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8.3.3 Oil change
 Please observe the instructions in the „General Safety Instructions” in section
3.3.1.
 You can find a list of permitted lubricants in section 4.3.
All gearboxes are lubricated for their entire working life. However, we recommend
an oil change after an initial 7,000 operating hours for synthetic oils, and then approx. every
10,000 operating hours thereafter. This is because oil becomes contaminated, causing
increased wear and tear.
Gearbox size All screws in accordance with DIN 908 with inner hexagon and
flanged
large screw small screws
040 G ⅜” –
050 G ½" G ¼"
063 G ½" G ¼"
080 G ¾" G ¼"
100 G 1" G ¼"
Table 8.2
Lubricant exchange for gearbox model V-Drive+/V-Drive economy 040
 Heat up the gearbox to operating temperature.
Fig. 8.1
 Drain the oil off through the plug
(fig. 8.1).
 If draining is not possible in mounted
position, dismantle the gearbox
as described in section 9.
 There is now only residual oil and dirt in the gearbox. We recommend that these
be flushed out:
- Screw in the plug and fill in oil.
- Let the machine run for a short time, and drain the oil off again.
 Fill with the prescribed quantity of oil.
 You can find the prescribed lubricant quantity in section 4.3.1 to 4.3.2.
 De-grease the plug and coat it with a sealant (e.g. Loctite 573).
 Screw in the plug (see also table 8.2).
 Should you have to dismantle the gearbox, remount it as described in section 6.