Siemens FLENDER K1N User manual

FLENDER gear units
Bevel gear unit
K1N and K1A
Sizes 1 to 9
Assembly and operating instructions
BA 5230 en 04/2011

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Bevel gear unit
K1N and K1A
Sizes 1 to 9
Assembly and operating instructions
Translation of the original assembly and operating instructions
T
echnical data
Spare parts,
customer service
Maintenance
and repair
Faults, causes
and remedy
Operation
Startup
Fitting
T
echnical
description
T
ransport and
storage
Safety instructions
General notes
Declarations
1
12
11
10
9
8
7
6
5
4
3
2

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Notes and symbols in these assembly and operating instructions
Note: The term "Assembly and operating instructions" will in the following also be shortened to "instructions"
or "manual".
Legal notes
Warning-note concept
This manual comprises notes which must be observed for your personal safety and for preventing material damage.
Notes for your personal safety are marked with a warning triangle or an "Ex" symbol (when applying
Directive 94/9/EC), those only for preventing material damage with a "STOP" sign.
WARNING! Imminent explosion!
The notes indicated by this symbol are given to prevent explosion damage.
Disregarding these notes may result in serious injury or death.
WARNING! Imminent personal injury!
The notes indicated by this symbol are given to prevent personal injury.
Disregarding these notes may result in serious injury or death.
WARNING! Imminent damage to the product!
The notes indicated by this symbol are given to prevent damage to the product.
Disregarding these notes may result in material damage.
NOTE!
The notes indicated by this symbol must be treated as general operating information.
Disregarding these notes may result in undesirable results or conditions.
WARNING! Hot surfaces!
The notes indicated by this symbol are made to prevent risk of burns due to hot surfaces
and must always be observed.
Disregarding these notes may result in light or serious injury.
Where there is more than one hazard, the warning note for whichever hazard is the most serious is always used.
If in a warning note a warning triangle is used to warn of possible personal injury, a warning of material damage may
be added to the same warning note.
Qualified personnel
The product or system to which these instructions relate may be handled only by persons qualified for the work
concerned and in accordance with the instructions relating to the work concerned, particularly the safety and
warning notes contained in those instructions. Qualified personnel must be specially trained and have the
experience necessary to recognise risks associated with these products or systems and to avoid possible hazards.

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Intended use of Siemens products
Observe also the following:
Siemens products must be used only for the applications provided for in the catalogue and the relevant
technical documentation. If products and components of other makes are used, they must be
recommended or approved by Siemens. The faultfree, safe operation of the products calls for proper
transport, proper storage, erection, assembly, installation, startup, operation and maintenance. The
permissible ambient conditions must be adhered to. Notes in the relevant documentations must be
observed.
Trademarks
All designations indicated with the registered industrial property mark ® are registered trademarks of Siemens AG.
Other designations used in these instructions may be trademarks the use of which by third parties for their own
purposes may infringe holders’ rights.
Exclusion of liability
We have checked the content of the instructions for compliance with the hard and software described.
Nevertheless, variances may occur, and so we can offer no warranty for complete agreement. The information
given in these instructions is regularly checked, and any necessary corrections are included in subsequent editions.
Symbols
Earth connection point Air relief point yellow
Oilfilling point yellow Oildraining point white
Oil level red Oil level red
Oil level red Connection for
vibrationmonitoring device
Lubrication point red Apply grease
Lifting eye Eye bolt
Do not unscrew
Alignment surface, horizontal Alignment surface, vertical
These symbols indicate the oillevel checking procedure using the oil dipstick.
These symbols indicate that the oil dipstick must always be firmly screwed in.

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Contents
1. Technical data 8.....................................................
1.1 General technical data 8...............................................................
1.2 Measuringsurface soundpressure level 9...............................................
1.2.1 Measuringsurface soundpressure level for bevel gear units (K...) with fan 9..................
1.2.2 Measuringsurface soundpressure level for bevel gear units (K...) without fan 9...............
1.3 Weights 9...........................................................................
2. General notes 10.....................................................
2.1 Introduction 10........................................................................
2.2 Copyright 10..........................................................................
3. Safety instructions 11.................................................
3.1 Obligations of the user 11...............................................................
3.2 Environmental protection 12.............................................................
3.3 Special dangers and personal protective equipment 12......................................
4. Transport and storage 13.............................................
4.1 Scope of supply 13....................................................................
4.2 Transport 13..........................................................................
4.3 Storing the gear unit 14.................................................................
4.4 Standard coating and preservation 15....................................................
4.4.1 Interior preservation with preservative agent 16............................................
4.4.2 Exterior preservation 16................................................................
5. Technical description 17..............................................
5.1 General description 17.................................................................
5.2 Housing 18...........................................................................
5.3 Toothed components 19................................................................
5.4 Lubrication 19.........................................................................
5.4.1 Splash lubrication 19...................................................................
5.4.2 Forced lubrication 20...................................................................
5.5 Shaft bearings 20......................................................................
5.6 Shaft seals 20.........................................................................
5.6.1 Radial shaftsealing rings 20............................................................
5.6.2 Taconite seal 21.......................................................................
5.7 Cooling 22............................................................................
5.7.1 Fan 22...............................................................................
5.7.2 Cooling coil 23........................................................................
5.7.3 Addon oilsupply system with air oilcooler 24.............................................
5.7.4 Addon oilsupply system with water oilcooler 25..........................................
5.7.4.1 Pump 25.............................................................................
5.7.4.2 Water oilcooler 25.....................................................................
5.7.4.3 Filter 25..............................................................................
5.7.5 Separate / external oilsupply system 26..................................................
5.8 Couplings, clutches 26.................................................................
5.9 Backstop 26..........................................................................
5.10 Heating 27............................................................................
5.11 Indication of oil level 27.................................................................
5.12 Oiltemperature monitoring system 27....................................................
5.13 Bearing monitoring by Pt 100 resistance thermometer 28....................................

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6. Fitting 29.............................................................
6.1 General information on fitting 29.........................................................
6.2 Unpacking 30.........................................................................
6.3 Fitting the gear unit by housing with base plate 30..........................................
6.3.1 Foundation 30.........................................................................
6.3.2 Description of installation work 30........................................................
6.3.2.1 Alignment 31..........................................................................
6.3.2.2 Fitting on a frame 32...................................................................
6.3.2.3 Fitting on a concrete foundation by means of stone bolts or foundation blocks 32................
6.3.2.4 Fitting on a concrete foundation by means of anchor bolts 33.................................
6.4 Assembly of a shaftmounted gear unit with hollow shaft and parallel keyway 34................
6.4.1 Preparatory work 35....................................................................
6.4.2 Fitting 35.............................................................................
6.4.2.1 Fitting 36.............................................................................
6.4.2.2 Axial fastening 36......................................................................
6.4.3 Demounting 36........................................................................
6.5 Shaftmounted gear unit with hollow shaft and shrink disk 38.................................
6.5.1 Fitting 38.............................................................................
6.6 Shrink disk 38.........................................................................
6.6.1 Fitting the shrink disk 39................................................................
6.6.2 Demounting the shrink disk 40...........................................................
6.6.3 Cleaning and greasing the shrink disk 41..................................................
6.6.4 Refitting the shrink disk 41..............................................................
6.6.5 Inspection of the shrink disk 42..........................................................
6.7 Couplings, clutches 42.................................................................
6.8 Gear unit with cooling coil 44............................................................
6.9 Gear unit with addon air oilcooler 44.....................................................
6.10 Gear unit with addon water oilcooler 44..................................................
6.11 Gear unit with separate oilsupply system 44...............................................
6.12 Gear unit with heating 44................................................................
6.13 Gear unit with oiltemperature monitoring system 44........................................
6.14 Bearingmonitoring system 44...........................................................
6.15 General notes on addon components 44.................................................
6.16 Final work 45..........................................................................
6.17 Screwconnection classes, tightening torques and initialtensioning forces 45..................
6.17.1 Screwconnection classes 45............................................................
6.17.2 Tightening torques and initialtensioning forces 46..........................................

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7. Startup 48...........................................................
7.1 Procedure before startup 48............................................................
7.1.1 Removal of preservative agent 48........................................................
7.1.2 Filling with lubricant 49.................................................................
7.2 Startup 49...........................................................................
7.2.1 Oil level 49............................................................................
7.2.2 Gear unit with cooling coil or water oilcooler 49............................................
7.2.3 Gear unit with cooling coil or addon oilsupply system 50....................................
7.2.4 Gear unit with cooling coil or external oilsupply system 50...................................
7.2.5 Gear unit with external oilsupply system 50...............................................
7.2.5.1 Prelubrication phase 50................................................................
7.2.5.2 Initial operation 50.....................................................................
7.2.6 Gear unit with backstop 51..............................................................
7.2.7 Temperature measurement 51...........................................................
7.2.8 Bearing monitoring (vibration measurement) 51............................................
7.2.9 Heating 51............................................................................
7.2.10 Checking procedure 52.................................................................
7.3 Removal from service 52...............................................................
7.3.1 Interior preservation for longer disuse 52..................................................
7.3.1.1 Interior preservation with gear oil 52......................................................
7.3.1.2 Interior preservation with preservative agent 52............................................
7.3.1.3 Interiorpreservation procedure 53.......................................................
7.3.2 Exterior preservation 53................................................................
7.3.2.1 Exteriorpreservation procedure 53.......................................................
8. Operation 54.........................................................
8.1 General 54............................................................................
8.2 Oil level 54............................................................................
8.3 Irregularities 54........................................................................
9. Faults, causes and remedy 55.........................................
9.1 General information on faults and malfunctions 55..........................................
9.2 Possible faults 55......................................................................
9.2.1 Leakage / leaktightness 58..............................................................
10. Maintenance and repair 59............................................
10.1 General notes on maintenance 59........................................................
10.1.1 General service lives of oils 60...........................................................
10.2 Description of maintenance and repair works 60............................................
10.2.1 Examine water content of oil, conduct oil analyses 60.......................................
10.2.2 Change oil 60.........................................................................
10.2.3 Clean the air filter 61...................................................................
10.2.4 Clean fan and gear unit 62..............................................................
10.2.5 Refill Taconite seals with grease 62......................................................
10.2.6 Check cooling coil 62...................................................................
10.2.7 Check air oilcooler 63..................................................................
10.2.8 Check water oilcooler 63...............................................................
10.2.9 Check hose lines 63....................................................................
10.2.10 Top up oil 63..........................................................................
10.2.11 Check tightness of fastening bolts 63.....................................................
10.3 Final work 64..........................................................................
10.4 General inspection of the gear unit 64.....................................................
10.5 Lubricants 64.........................................................................
11. Spare parts, customer service 65......................................
11.1 Stocking spare parts 65.................................................................
11.2 Spare parts and customerservice addresses 65...........................................
12. Declarations 66.......................................................
12.1 Declaration of incorporation 66..........................................................

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1. Technical data
1.1 General technical data
The most important technical data are shown on the rating plate. These data and the contractual
agreements between Siemens and the customer for the gear unit determine the limits of its correct use.
①
②
③④
⑤⑥
⑦⑧
⑨
⑩
⑪
⑫
⑬
Fig. 1: Rating plate on gear unit
①Company logo ⑧Speed n2
②Order number, item, sequence number, ⑨Oil data
year built (oil type, oil viscosity, oil quantity)
③Total weight in kg ⑩Instructions number(s)
④Special information ⑪Special information
⑤Type, size *) ⑫Manufacturer and place of manufacture
⑥Power rating P2in kW or torque T2in Nm ⑬Country of origin
⑦Speed n1
*) Example
K1N 5
Size 1 ... 9......................
Type of output shaft N = Solid shaft.........
A = Hollow shaft
Number of stages 1 = Single-stage..........
Gear-unit type K = Bevel gear unit.............
For specifications for the measuringsurface soundpressure level of the various types of gear unit, please
refer to item 1.2.
For further technical data, please refer to the drawings in the gearunit documentation and the
orderspecific data sheet.

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1.2 Measuringsurface soundpressure level
The gear unit has a measuringsurface soundpressure level at a distance of 1 m, which can be found in
tables 1 and 2.
The measurement is carried out to DIN EN ISO 9614 Part 2, using the soundintensity method.
The workplace of the operating personnel is defined as the area on the measuringsurface at a distance
of 1 metre in the vicinity of which persons may be present.
The soundpressure level applies to the warmedup gear unit at input speed n1and output power P2stated
on the rating plate, as measurement obtained on the Siemens test bench. If several figures are given, the
highest speed and power values apply.
The measuringsurface soundpressure level includes addon lubrication units, if applicable. With
outgoing and incoming pipes, the interfaces are the flanges.
The soundpressure levels stated in the table were obtained by statistical calculation by our Quality Control
Dept. The gear unit can be statistically expected to comply with these soundpressure levels.
1.2.1 Measuringsurface soundpressure level for bevel gear units (K...) with fan
Table 1: Measuringsurface soundpressure level LpA in dB(A) for bevel gear units with fan
c
Type iNn1
1/min
Gear-unit size
1 1.2 1.5 2 3 4 5 6 7 8 9
K1.
1 1500 70 72 74 77 79 82 85 87 90 92 94
. 1000 65 67 70 72 75 79 81 83 86 88 90
1.6 750 60 62 65 67 70 72 74 76 79 81 85
1.8 1500 67 69 71 74 77 81 83 86 88 91 93
. 1000 63 64 67 68 73 76 78 80 82 85 87
2.8 750 1) 1) 61 62 65 68 70 72 75 78 82
3.15 1500 63 65 68 72 77 79 82 84 86 89 91
. 1000 1) 1) 62 65 70 73 76 78 80 83 85
5750 1) 1) 1) 1) 63 66 69 72 73 76 78
1) LpA < 60 dB(A)
1.2.2 Measuringsurface soundpressure level for bevel gear units (K...) without fan
Table 2: Measuringsurface soundpressure level LpA in dB(A) for bevel gear units without fan
Measuring-surface sound-pressure level LpA in dB(A)
Type iNn1
1/min
Gear-unit size
1 1.2 1.5 2 3 4 5 6 7 8 9
K1.
1 1500 69 71 73 76 78 81 84 87 89 91 93
. 1000 64 66 69 71 74 78 80 82 84 87 89
1.6 750 1) 61 64 66 69 71 73 75 78 80 84
1.8 1500 66 68 70 73 76 80 82 85 87 89 91
. 1000 62 63 66 67 72 75 77 79 81 84 86
2.8 750 1) 1) 60 61 64 67 69 71 74 77 81
3.15 1500 62 64 67 71 76 78 81 83 85 88 90
. 1000 1) 1) 61 64 69 72 75 77 79 82 84
5750 1) 1) 1) 1) 62 65 68 71 72 75 77
1) LpA < 60 dB(A)
1.3 Weights
For the exact weights, refer to the drawings in the gearunit documentation.

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2. General notes
2.1 Introduction
These instructions are an integral part of the gear unit supplied and must be kept in its vicinity for reference
at all times.
All persons carrying out work on the gear unit must have read and understood these
instructions and must adhere to them. Siemens accepts no responsibility for damage
or disruption caused by disregard of these instructions.
The "FLENDER bevelgear unit" dealt with in these instructions has been developed for driving
machines in general engineering applications. Possible applications for gear units of this series are the
chemical, rubber, food processing, plastics and other industries.
The gear unit is designed only for the application specified in section 1, "Technical data". Other operating
conditions must be contractually agreed.
The gear unit has been manufactured in accordance with the state of the art and is delivered in a condition
for safe and reliable use.
The gear unit must be used and operated strictly in accordance with the conditions laid down in the contract
governing performance and supply agreed by Siemens and the customer.
The gear unit described in these instructions reflects the state of technical development at the time these
instructions went to print.
In the interest of technical progress we reserve the right to make changes to the individual assemblies and
accessories which we regard as necessary to preserve their essential characteristics and improve their
efficiency and safety.
2.2 Copyright
The copyright to these instructions is held by Siemens AG.
These instructions must not be wholly or partly reproduced for competitive purposes, used in any
unauthorised way or made available to third parties without our agreement.
Technical enquiries should be addressed to the following works or to one of our customer services:
Siemens AG
Am Industriepark 2
46562 Voerde
Tel.: [phone] / 92‐0
Fax: [phone] / 92‐1544

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3. Safety instructions
Entry to the gear unit and its addon components is not permitted!
Caution! Risk of falling!
Any changes on the part of the user are not permitted. This applies equally to safety
features designed to prevent accidental contact.
3.1 Obligations of the user
• The operator must ensure that everyone carrying out work on the gear unit has read and understood
these instructions and is adhering to them in every point in order to:
─ avoid injury or damage.
─ ensure the safety and reliability of the unit.
─ avoid disruptions and environmental damage through incorrect use.
• During transport, assembly, installation, dismantling, operation and maintenance of the unit, the
relevant safety and environmental regulations must be complied with at all times.
• The gear unit may only be operated, maintained and/or repaired by persons qualified for the work
concerned (see "Qualified personnel" on page 3 of this manual).
• The outside of the gear unit must not be cleaned with highpressure cleaning equipment.
• All work must be carried out with great care and with due regard to safety.
All work on the gear unit must be carried out only when it is at a standstill.
The drive unit must be secured against being switched on accidentally (e.g. by locking
the key switch or removing the fuses from the power supply). A notice should be
attached to the start switch stating clearly that work is in progress.
• No electrical welding work must be done at all on the drive system.
The drive systems must not be used as an earthing point for welding operations. Toothed parts and
bearings may be irreparably damaged by welding.
• A potential equalisation in accordance with the applying regulations and directives must be carried out!
If no threaded holes for earth connection are available on the gear unit, other appropriate measures
must be taken. This work must always be done by specialist electricians.
If any inexplicable changes are noticed during operation of the gear unit, such as an
important increase in temperature or unusual noises, the drive assembly must be
switched off immediately.
Rotating and/or movable drive components must be fitted with suitable safeguards to
prevent contact.
When the gear unit is incorporated in plant or machinery, the manufacturer of such
plant or machinery must ensure that the prescriptions, notes and descriptions
contained in these instructions are incorporated in his own instructions.

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• Removed safety equipment must be reinstalled prior to starting up.
• Notices attached to the gear unit, e.g. rating plate, direction arrows etc., must always be observed.
They must be kept free from dirt and paint at all times. Missing plates must be replaced.
• Screws which have been damaged during assembly or disassembly work must be replaced with new
ones of the same strength class and type.
• Spare parts must always be obtained from Siemens (see section 11, "Spare parts, customer service").
3.2 Environmental protection
• Dispose of any packing material in accordance with regulations or separate it for recycling.
• When changing oil, the used oil must be collected in suitable containers. Any pools of oil which may
have collected should be removed at once with an oilbinding agent.
• Preservative agents should be stored separately from used oil.
• Used oil, preservative agents, oilbinding agents and oilsoaked cloths must be disposed of in
accordance with environmental legislation.
• Disposal of the gear unit after its useful life:
─ Drain all the operating oil, preservative agent and/or cooling agent from the gear unit and dispose
of in accordance with regulations.
─ Depending on national regulations, gearunit components and/or addon parts may have to be
disposed of or sent for recycling separately.
3.3 Special dangers and personal protective equipment
• Depending on operating conditions, the surface of the gear unit may heat up or cool down to extreme
temperatures.
In the case of hot surfaces (> 55 °C) there is a risk of burns!
In the case of cold surfaces (< 0 °C) there is a risk of frost injury (pain, numbness,
frostbite)!
During oil changes there is a risk of scalding from escaping oil!
Small foreign matter such as sand, dust, etc. can get into the cover plates of the
rotating parts and be thrown back by these.
Risk of eye injury!
In addition to any generally prescribed personal safety equipment (such as safety shoes,
safety clothing, helmet) handling the gear unit requires wearing suitable safety gloves and
suitable safety glasses!
The gear unit is not suitable for operation in explosionhazard locations. It must under
no circumstances be used in such locations because of the risk to life and limb.

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4. Transport and storage
Observe the instructions in section 3, "Safety instructions"!
4.1 Scope of supply
The products supplied are listed in the dispatch papers. Check immediately on receipt to ensure that all
the products listed have actually been delivered. Parts damaged and/or missing parts must be reported
to Siemens in writing immediately.
If there is any visible damage, the gear unit must not be put into operation.
4.2 Transport
During transport, use only lifting and handling equipment of sufficient loadbearing
capacity!
Observe the notes regarding load distribution on the packing.
The gear unit is delivered in the fully assembled condition. Additional items are delivered separately
packaged, if applicable.
Different forms of packaging may be used, depending on the size of the unit and method of transport.
Unless otherwise agreed, the packaging complies with the HPE Packaging Guidelines.
The symbols marked on the packing must be observed at all times. These have the following meanings:
Top Fragile Keep dry Keep cool Centre of
gravity
Use no hand
hook
Attach
here
Fig. 2: Transport symbols
Transport of the gear unit must be carried out so as to avoid personal damage and
damage to the gear unit.
If, for example, the free shaft ends are knocked, this may damage the gear unit.
The gear unit must be transported only with the appropriate transport equipment. During
transport the gear unit should be left without oil filling and on the transport packing.
Units which are slung by eyebolts must not be tilted.
Use only the 4 eye bolts provided to attach lifting equipment to the unit.
Handling of the gear unit by attaching it to the pipework is not permitted.
The pipework must not be damaged.
Do not use the front threads at the shaft ends to attach slinging and lifting gear for
transport.
Slinging and lifting gear must be adequate for the weight of the gear unit.

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Fig. 3: Attachment points
For a detailed illustration of the gear unit and the position of the attachment points, please refer
to the drawings in the orderspecific gearunit documentation.
For drive units where addon parts such as drive motor or addon coupling are fitted on the gear unit, an
additional attachment point may be required because of the shift in the centre of gravity.
4.3 Storing the gear unit
The gear unit must be stored in a sheltered place in the position of the original packaging or in the position
of use, placed on a vibrationfree, dry base, and covered over.
When temporarily storing the gear unit and any single components supplied with it,
the preservative agent should be left on them. It must not be damaged, otherwise there
is a risk of corrosion.
Do not stack gear units on top of one another.
If the gear unit is being stored out of doors, it must be particularly carefully covered,
and care must be taken that neither moisture nor foreign material can collect on the
unit. Waterlogging should be avoided.
Unless otherwise agreed by contract, the gear unit must not be exposed to harmful
environmental factors such as chemically aggressive products.
Provision for special environmental conditions during transport (e.g. transport by ship) and
storage (climate, termites, etc.) must be contractually agreed.

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4.4 Standard coating and preservation
The gear unit is provided with an interior preservative agent; the free shaft ends are painted for protection.
The characteristics of the external coat depend on the ambient conditions stipulated in the order relating
to method of transport and area of application.
The gear unit is normally delivered completely ready, with a priming and a finish coat.
Where gear units are delivered with a priming coat only, it is necessary to apply a finish
coat in accordance with directives applying to the specific application.
The priming coat alone is not suitable to provide a sufficient longterm corrosion
protection.
Ensure that the coat is not damaged!
Any damage may cause failure of the external protective coating and corrosion.
Unless otherwise contractually agreed, the durability period of the interior gearunit
preservation specified in table 3 or 4 will apply, provided the related requirements are adhered
to. The durability period for the exterior preservation and the related requirements can be found
in table 5.
The guarantee period starts on the date of delivery or that of the notice that the item is ready
for shipment.
In case of a storage period other than that indicated in table 3 or 4 and in table 5, the interior and the exterior
preservation must be checked and, as necessary, be repeated (see items 7.3.1 and 7.3.2).

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4.4.1 Interior preservation with preservative agent
Table 3: Durability period and measures for interior preservation when using mineral oil or PAObased
synthetic oil
Duration of protection Preservative agent Special measures
up to 6months
Castrol Alpha SP 220 S
None
up to 24 months
- Close all holes in the gear unit.
- Replace the air filter with the screw plug.
(Prior to startup replace screw plug
with air filter.)
For storage periods longer than 24 months, renew the preservative agent.
Table 4: Durability period and measures for interior preservation when using PGbased synthetic oil
Duration of protection Preservative agent Special measures
up to 6months
Special anti-corrosion oil
TRIBOL 1390 1)
None
up to 36 months
- Close all holes in the gear unit.
- Replace the air filter with the screw plug.
(Prior to startup replace screw plug
with air filter.)
For storage periods longer than 36 months, Siemens should be consulted before.
1) Resistant to tropical conditions and sea water; max. ambient temperature 50 °C
4.4.2 Exterior preservation
Table 5: Durability period for exterior preservation of shaft ends and other bright machined surfaces
Duration
of protection
Preservative
agent Layer
thickness Remarks
In case of
indoor storage
up to 36 months 1)
Tectyl 846 K19 Approx. 50 μm
Long-term wax-based preservative
agent:
- resistant to seawater
- resistant to tropical conditions
- (soluble with CH compounds)
In case of
outdoor storage
up to 12 months 2)
1) The gear unit must be stored in the position of use in a sheltered place; it must be placed on
a vibrationfree, dry wooden base and covered over.
2) If the gear unit is being stored out of doors, it must be particularly carefully covered, and care must be
taken that neither moisture nor foreign material can collect on the unit. Waterlogging should be avoided.
The procedure for interior and exterior preservation treatment is described in section 7
(see items 7.3.1.3 and 7.3.2.1)!

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5. Technical description
Observe the instructions in section 3, "Safety instructions"!
5.1 General description
The gear unit described is a bevelgear unit developed for driving machines in general engineering
applications.
The gear unit is delivered as a singlestage bevelgear unit. It is designed for installation in the position
specified in the order.
The gear unit can be operated in both directions of rotation. However, it is possible that
a certain direction of rotation has been specified in the order which is realised by
a addingon a backstop.
A number of shaft configurations (types and rotation directions) are possible. These are shown in the
following table as solid shafts. The arrows with the direction of rotation show the correlation between the
directions of rotation of the input and output shafts.
Table 6: Versions and correlation of direction of rotation
Type Version
A B C D E F
K1N
K1A
When fitting the auxiliary drive (as maintenance and/or load drive) the assignment of the
direction of rotation to the design is defined in the dimensioned drawing.
The gear units are characterised by a low noise level, which is achieved by bevel gears with a high contact
ratio and a special sounddamping housing.
The good temperature characteristics of the gear unit are achieved by its high degree of efficiency, large
housing surface and performancerelated cooling system.
Depending on requirements, the gear unit in the standard range can be fitted with the following items:
• with base plate
• with fan (including air guide cover)
• with flange or motor pump
• with cooling coil
• with backstop
• with heating.

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5.2 Housing
The housing is made of cast iron; if necessary, it can also be made of nodular cast iron.
The housing is made in one part. It is of torsionally rigid design and its shape imparts very favourable noise
and temperature characterics.
The gearunit housing comes with the following equipment:
• Eye bolts (adequately dimensioned for transport)
• Inspection and/or assembly holes (for oil filling and/or inspection)
• Oillevel indicator or oil dipstick (for checking the oil level)
• Oildrain plug or oildrain cock (to drain the oil)
• Air filter (for venting)
Colour codes for ventilating, oil inlet, oil level and oil drainage:
Airrelief point: yellow Oildraining point: white
Oilfilling point: yellow Lubrication point: red
Oil level: red Oil level: red

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1
6
8
47
5
12
32
109
11
Fig. 4: Gearunit features
1 Drive shaft 7 Oillevel indicator
2 Shaft bearing 8 Fan
3 Housing 9 Airguide cover
4 Oil drain 10 Bearing cover
5 Breather 11 Eye bolts
6 Oil inlet 12 Inspection and/or assembly holes
A detailed view of the gear unit can be obtained from the drawings in the gearunit documentation.
5.3 Toothed components
The toothed components of the gear unit are casehardened. The bevelgear teeth are ground or lapped.
The high quality of the teeth leads to a significant noise reduction and ensures safe and reliable running.
The bevel-gear wheel is joined to the shaft by interference fit and parallel key. This type of joint transmits
with adequate reliability the torque generated.
5.4 Lubrication
5.4.1 Splash lubrication
Unless otherwise agreed in the order, the teeth and bearings are adequately splashlubricated with oil. The
gear unit thus requires very little maintenance.

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5.4.2 Force-feed lubrication
In case of high input speeds or high peripheral speeds at the toothed systems, the splash lubrication can,
depending on the order, be supplemented by or replaced with a forcedfeed lubrication. In case of
forcedfeed lubrication the bearings and/or teeth situated higher than the oil level can be adequately
supplied with oil by pipework.
In case of a vertical mounting position the splash lubrication must be replaced with a force-feed lubrication.
The following configurations are possible:
• Flangedon pump
• Motor pump
• Oil wiper (sliding block)
• Addon oilsupply system (fixed to the gear unit, see item 5.7.4)
• External oilsupply system (fitted separately, see item 5.7.5).
For an accurate illustration of the gear unit and oilsupply system, refer to the drawings in the gearunit
documentation.
In case of gear units with oilsupply system, before starting the unit up all monitors
must be connected so as to be ready for operation.
5.5 Shaft bearings
All shafts are fitted in rolling bearings.
5.6 Shaft seals
Radial shaftsealing rings or Taconite seals at the shaft outlets prevent oil from escaping from, or dirt from
entering into the gear unit.
5.6.1 Radial shaftsealing rings
Radial shaftsealing rings are the standard type of seal. They are fitted preferably with an additional dust
lip to protect the actual sealing lip from external contamination.
Use in an area with much dust is not possible.
Fig. 5: Radial shaftsealing ring