nord B 1050 Specification sheet

B 1050 –en
Industrial gear units
Manual with installation instructions

Industrial gear units – Manual with installation instructions
2 B 1050 en-3921

Read this manual with installation instructions
B 1050 en-3921 3
Read this manual with installation instructions
Read this manual with installation instructions carefully prior to performing any work on or putting the
gear unit into operation. Always observe the instructions in this document.
Keep this document in the vicinity of the unit motor so that it is available if required.
Please also note the following documents:
• Gear unit catalogues,
• Documentation for the electric motor,
• Documentation for equipment which is attached or provided.
Please contact Getriebebau NORD GmbH & Co. KG if you require further information.

Industrial gear units – Manual with installation instructions
4 B 1050 en-3921
Documentation
Designation:
B 1050
Part No.:
6052902
Series: Gear units and geared motors
Type series: SK 5207 to SK 15507,
SK 5217 to SK 11217 and SK xx319
Gear unit types: Industrial gear units
Version list
Title,
Date
Order number /
Version Remarks
Internal code
B 1050
,
January
2013
6052902
/ 0213 -
B 1050,
September
2014
6052902 / 3814
General corrections
B 1050,
April 2015
6052902 / 1915
General corrections
B 1050,
March 2016
6052902 / 0916
General corrections
B 1050
,
May 2017
6052902
/ 1817 Revised
B 1050,
May 2019
6052902 / 1819
Extension of the series MAXXDRIVE®XT
General corrections
B 1050,
October
2019
6052902 / 4419
• Extensive revision of the safety and warning information,
• Revision of the description for Options MS and MF
• Option SAFOMI added
• SK 5217 to 11217 added
• SK x319 added
• Sound Emission section added
• Supplements to Service and Maintenance Intervals section
• Supplements to Brake section
• General corrections

Version list
B 1050 en-3921 5
Title,
Date
Order number /
Version Remarks
Internal code
B 1050,
November
2020
6052902 / 4620
• Descriptions for Options DB and VL/KL 2/3/4/6 added
• Revision of tables for lubricant oil and minimum starting temperatures
• General corrections and amendments
B 1050,
September
2021
6052902 / 3921
• Editorial revision
• General corrections and amendments
32534
Table 1: Version list B 1050

Industrial gear units – Manual with installation instructions
6 B 1050 en-3921
Copyright notice
As an integral component of the device described here, this document must be provided to all
users in a suitable form.
Any editing or amendment or other utilisation of the document is prohibited.
Publisher
Getriebebau NORD GmbH & Co. KG
Getriebebau-Nord-Straße 1 •22941 Bargteheide, Germany •http://www.nord.com
Fon +49 (0) 45 32 / 289-0 •Fax [phone]
Member of the NORD DRIVESYSTEMS Group

Publisher
B 1050 en-3921 7

Industrial gear units – Manual with installation instructions
8 B 1050 en-3921
Table of Contents
1Safety information.....................................................................................................................................13
1.1 Intended use ....................................................................................................................................13
1.2 Do not make any modifications........................................................................................................13
1.3 Performing inspection and maintenance work .................................................................................13
1.4 Personnel qualification.....................................................................................................................13
1.5 Safety for particular activities...........................................................................................................14
1.5.1 Check for transport damage...............................................................................................14
1.5.2 Safety information for installation and maintenance...........................................................14
1.6 Hazards............................................................................................................................................14
1.6.1 Hazards when lifting ...........................................................................................................14
1.6.2 Hazards due to rotating parts .............................................................................................14
1.6.3 Danger on entry..................................................................................................................15
1.6.4 Hazards due to high or low temperatures...........................................................................15
1.6.5 Hazards due to lubricants and other substances................................................................15
1.6.6 Hazards due to noise..........................................................................................................15
1.6.7 Hazards due to pressurised coolants .................................................................................15
2Description of gear units..........................................................................................................................16
2.1 Type designations and gear unit types ............................................................................................16
2.2 Name plate.......................................................................................................................................20
3Transport, storage, assembly ..................................................................................................................21
3.1 Transporting the gear unit................................................................................................................21
3.1.1 Transport of standard gear units.........................................................................................22
3.1.2 Transport of gear units with motor adapter.........................................................................23
3.1.3 Transport of gear units with auxiliary drives or first stage gear units (Option: WG, WX) ....24
3.1.4 Transport of gear units with V-belt drives ...........................................................................25
3.1.5 Transport of agitator version gear units..............................................................................26
3.1.6 Transport of gear unit with motor swing base or base frame..............................................27
3.2 Storage and downtimes ...................................................................................................................28
3.2.1 General measures..............................................................................................................28
3.2.2 Storage and downtimes in excess of 3 months ..................................................................28
3.2.3 Storage and downtimes in excess of 9 months ..................................................................28
3.3 Preparing for installation ..................................................................................................................29
3.3.1 Check for damages ............................................................................................................29
3.3.2 Remove corrosion protection agents..................................................................................29
3.3.3 Check rotational direction...................................................................................................30
3.3.4 Check ambient conditions ..................................................................................................30
3.3.5 Installing the oil reservoir tank (Option OT) ........................................................................30
3.4 Installing the gear unit......................................................................................................................30
3.5 Installation of a hub on solid shaft (option: V, L) ..............................................................................31
3.6 Assembly of gear unit with hollow shaft (Option: A, EA) ..................................................................33
3.6.1 Fitting a hollow shaft with fastening element (Option: B)....................................................34
3.6.2 Fitting a hollow shaft with shrink disc (Option: S) ...............................................................35
3.7 Fitting a hollow shaft with GRIPMAXX™ (Option: M).......................................................................38
3.8 Installing a flange version gear unit (Option: F, FK, VL2/3/4/5, KL2/3/4) .........................................41
3.8.1 Agitator version (Option: VL2, KL2)....................................................................................41
3.8.2 Agitator version with Drywell (Option: VL3, KL3)................................................................41
3.8.3 Agitator version with True Drywell (Option: VL4, KL4)........................................................42
3.8.4 Extruder flange version (Option: VL5) ................................................................................42
3.8.5 Agitator version with True Drywell and foot mounting (Option: VL6, KL6)..........................43
3.9 True Drywell version gear units (Option: VL4, KL4, VL6, KL6, DRY)...............................................44
3.10 Motor base frame (Option: MF)........................................................................................................45
3.11 Motor swing base (Option: MS)........................................................................................................46
3.12 Motor mount (Option: MT)................................................................................................................47
3.13 Installing the belt drive .....................................................................................................................47
3.14 Installing the cover cap, air baffle (Option: H, H66, FAN, MF.., MS…).............................................50
3.15 Fitting a standard motor (Option: IEC, NEMA).................................................................................50
3.16 Installing the drive coupling..............................................................................................................52

Table of Contents
B 1050 en-3921 9
3.16.1 Dog coupling.......................................................................................................................52
3.16.2 Turbo coupling....................................................................................................................52
3.16.3 Dog coupling.......................................................................................................................53
3.17 Installing the output coupling............................................................................................................53
3.18 Installation of the internal cooling system (Option: CC)....................................................................54
3.19 Installation of an external cooling system (Option: CS1-X, CS2-X)..................................................55
3.20 Installing a fan (Option: FAN-A, FAN-R) ..........................................................................................56
3.21 Installation of the lubricant circulation (Option: LC, LCX).................................................................57
3.22 Gear unit monitoring sensors (option: MO)......................................................................................57
3.23 Installing the torque arm (Option: D, ED, MS)..................................................................................57
3.24 Connecting the oil heater (Option: OH)............................................................................................59
3.25 Adjusting the brake ..........................................................................................................................59
3.25.1 Automatic lining wear correction (option: LWC)..................................................................59
3.25.2 Limit switch to indicate the brake lining wear (option SLW)................................................60
3.25.3 Connecting the NC/NO contacts (Option: SO/SC)..............................................................60
3.25.4 Manual release and manual release with limit switch (option: MR, Option: MRS)..............60
3.26 Subsequent painting ........................................................................................................................60
4Commissioning .........................................................................................................................................61
4.1 Checking the oil level.......................................................................................................................61
4.2 Activating the vent............................................................................................................................61
4.3 Taconite seal/Labyrinth seal ............................................................................................................62
4.4 Heated output hollow shaft...............................................................................................................63
4.5 Lubricant circulation (Option: LC, LCX)............................................................................................63
4.6 Gear unit cooling with fan (Option: FAN-A, FAN-R).........................................................................63
4.7 Cooling coil (Option: CC) .................................................................................................................65
4.8 External cooling system (Option: CS1-X, CS2-X) ............................................................................66
4.8.1 Oil / water cooler (Option: CS1-X)......................................................................................66
4.8.2 Oil / air coolers (Option: CS2-X).........................................................................................67
4.9 Oil heater (Option: OH)....................................................................................................................67
4.10 Temperature monitoring (Option: PT100) ........................................................................................67
4.11 Backstop/Auxiliary drive (Option: R, WX).........................................................................................68
4.12 Test run............................................................................................................................................71
4.13 Checklist ..........................................................................................................................................72
4.13.1 Obligatory...........................................................................................................................72
4.13.2 Optional..............................................................................................................................73
5Service and maintenance .........................................................................................................................74
5.1 Inspection and maintenance intervals..............................................................................................74
5.2 Service and maintenance work........................................................................................................76
5.2.1 Visual inspection for leaks..................................................................................................76
5.2.2 Check for running noises....................................................................................................76
5.2.3 Check fan and spaces between the ribs (Maxxdrie XT) (Option: FAN-A, FAN-R)..............76
5.2.4 Cleaning the heat exchanger (Option: CS2-X) ...................................................................77
5.2.5 Oil level...............................................................................................................................77
5.2.5.1 Oil level screw 78
5.2.5.2 Oil inspection glass/oil level glass (Option: OSG), Oil level indicator (Option: OST) 78
5.2.5.3 Oil dipstick (Option: PS) 78
5.2.5.4 Oil level tanks (Option: OT) 79
5.2.5.5 Checking the leak indicator (Option: VL3, KL3 with Drywell) 79
5.2.5.6 No-seal adapter for agitators (Option: SAFOMI) 80
5.2.6 Visual inspection of the rubber elements of the elastic torque arm (Option: ED)................82
5.2.7 Visual inspection of cables .................................................................................................82
5.2.7.1 Piping (Option: LC, LCX, OT) 82
5.2.7.2 Hose lines (Option: LC, LCX, CS1-X, CS2-X, OT) 82
5.2.8 Oil filter (Option: CS1-X, CS2-X, LC/LCX)..........................................................................82
5.2.9 Remove dust ......................................................................................................................82
5.2.10 Oil change ..........................................................................................................................83
5.2.11 Checking the cooling coil for deposits (Option: CC) ...........................................................84
5.2.12 Cleaning or replacing the vent............................................................................................84
5.2.12.1Vent filter (Option: FV) 84
5.2.12.2Cellulose filter (Option: EF) 84
5.2.12.3Drying agent filter / Wet air filter (Option: DB) 85
5.2.13 Replacing the shaft sealing ring..........................................................................................86

Industrial gear units – Manual with installation instructions
10 B 1050 en-3921
5.2.14 Re-lubrication of bearings in the gear unit..........................................................................86
5.2.15 Re-lubricating the bearing in the output flange (Option: VL2/3/4/6, KL2/3/4/6)...................87
5.2.16 Re-greasing the Taconite seal............................................................................................88
5.2.17 Checking v-belts (belt drives) .............................................................................................89
5.2.18 Inspection cover .................................................................................................................89
5.2.19 General overhaul................................................................................................................91
6Disposal .....................................................................................................................................................92
7Appendix....................................................................................................................................................93
7.1 Versions and mounting position.......................................................................................................93
7.1.1 Parallel gear units...............................................................................................................93
7.1.2 Helical bevel gear unit ........................................................................................................94
7.2 Standard positions of the oil drain, vent and oil level .......................................................................94
7.3 Lubricants ......................................................................................................................................113
7.3.1 Roller bearing greases .....................................................................................................113
7.3.2 Gear oils...........................................................................................................................114
7.3.3 Minimum starting temperatures........................................................................................116
7.3.4 Lubricant quantities ..........................................................................................................117
7.4 Screw tightening torques................................................................................................................118
7.5 Tolerances for bolting surfaces......................................................................................................118
7.6 Troubleshooting .............................................................................................................................119
7.7 Leakage and leak-tightness ...........................................................................................................121
7.8 Noise emissions.............................................................................................................................122
7.9 Repair information..........................................................................................................................122
7.9.1 Repairs.............................................................................................................................122
7.9.2 Internet information...........................................................................................................122
7.10 Warranty ........................................................................................................................................122
7.11 Abbreviations .................................................................................................................................123

List of illustrations
B 1050 en-3921 11
List of illustrations
Figure 1: MAXXDRIVE®XT 2-stage helical bevel gear unit .................................................................................. 17
Figure 2: Name plate............................................................................................................................................. 20
Figure 3: Transport of standard gear unit .............................................................................................................. 22
Figure 4: Transport of gear units with motor adapter............................................................................................. 23
Figure 5: Transport of gear units with auxiliary drives or first stage gear units...................................................... 24
Figure 6: Transport of gear units with V-belt drives............................................................................................... 25
Figure 7: Transport of agitator version gear units.................................................................................................. 26
Figure 8: Transport of gear unit with motor swing base or base frame.................................................................. 27
Figure 9: Example of a simple pulling device ........................................................................................................ 31
Figure 10: Permissible application of force to drive and driven shafts................................................................... 32
Figure 11: Applying lubricant to the shaft and the hub........................................................................................... 33
Figure 12: Assembly and disassembly of the fastening element (schematic diagram).......................................... 34
Figure 13: Fastening element (example)............................................................................................................... 35
Figure 14: Machine shaft assembly for special hollow shafts with shrink discs..................................................... 36
Figure 15: Fitted shrink disc .................................................................................................................................. 37
Figure 16: GRIPMAXX™, exploded diagram ........................................................................................................ 38
Figure 17: VL2 Option ........................................................................................................................................... 41
Figure 18: Option VL3/KL3 and VL4/KL4 .............................................................................................................. 42
Figure 19: Option VL6/KL6.................................................................................................................................... 43
Figure 20: Schematic diagram (Option: DRY) ....................................................................................................... 44
Figure 21: V-belt pulley (disassembled/assembled).............................................................................................. 48
Figure 22: Axle alignment (belt drives).................................................................................................................. 49
Figure 23: Centre of gravity of motor..................................................................................................................... 51
Figure 24: Fitting the coupling to the motor shaft................................................................................................... 52
Figure 25: Fusible plug with separate mechanical switch...................................................................................... 53
Figure 26: Cooling cover with cooling coil fitted (schematic diagram) ................................................................... 55
Figure 27: Industrial gear unit with CS1-X and CS2-X cooling systems................................................................ 56
Figure 28: Hydraulic plan of industrial gear units with CS1-X and CS2-X cooling systems................................... 56
Figure 29: Permissible installation tolerances of the torque arm (Option D and ED) (schematic diagram)............ 58
Figure 30: Activation of the pressure vent ............................................................................................................. 62
Figure 31: Checking a Taconite seal ..................................................................................................................... 62
Figure 32: Industrial gear unit with back stop (schematic diagram)....................................................................... 69
Figure 33: Checking the oil level with a dipstick .................................................................................................... 78
Figure 34: Checking the oil level with an oil dip-stick............................................................................................. 78
Figure 35: Illustration air space.............................................................................................................................. 80
Figure 36: Vent filter (Option FV)........................................................................................................................... 84
Figure 37: Cellulose filter (Option EF) ................................................................................................................... 84
Figure 38: Drying agent filter, example version ..................................................................................................... 85
Figure 39: Installing the drying agent filter............................................................................................................. 85
Figure 40: MSS7 seal............................................................................................................................................ 86
Figure 41: Re-grease Taconite seal ...................................................................................................................... 88
Figure 42: Examples of inspection covers............................................................................................................. 90
Figure 43: Helical gear unit installation positions with standard mounting surface................................................ 93
Figure 44: Bevel gear unit installation positions with standard mounting surface.................................................. 94
Figure 45: Numbering of oil screw holes on SK 5207 – SK 10507...................................................................... 102
Figure 46: Numbering of oil screw holes on SK 11207 – SK 15507.................................................................... 108
Figure 47: Numbering of oil screw holes on SK 5217 – SK 11217...................................................................... 112

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12 B 1050 en-3921
List of tables
Table 1: Version list B 1050..................................................................................................................................... 5
Table 2: Type designations and gear unit types.................................................................................................... 16
Table 3: Versions and options............................................................................................................................... 19
Table 4: Permissible machine shaft tolerances ..................................................................................................... 39
Table 5: IEC and NEMA motor weights................................................................................................................. 50
Table 6: Transnorm motor weights........................................................................................................................ 51
Table 7: Oil spaces as delivered............................................................................................................................ 61
Table 8: Back stop lift-off speeds SK 5..07 – SK 10..07 ........................................................................................ 70
Table 9: Back stop lift-off speeds SK 11..07 – SK 15..07 ...................................................................................... 71
Table 10: Back stop lift-off speeds SK 5..17 – SK 11..17 ...................................................................................... 71
Table 11: Obligatory checklist for commissioning.................................................................................................. 72
Table 12: Optional checklist for commissioning..................................................................................................... 73
Table 13: Inspection and maintenance intervals ................................................................................................... 75
Table 14: Grease quantities for re-greasing the lower output shaft bearing .......................................................... 88
Table 15: Materials................................................................................................................................................ 92
Table 16: Position of housing options on oil screw holes (standard installation positions).................................... 96
Table 17: Roller bearing greases......................................................................................................................... 113
Table 18: Lubricant oil table ................................................................................................................................ 115
Table 19: Minimum starting temperatures for mineral oils (guideline values for the ambient temperature)......... 116
Table 20: Minimum starting temperatures for synthetic oils (guideline values for the ambient temperature)....... 116
Table 21: Screw tightening torques ..................................................................................................................... 118
Table 22: Overview of malfunctions..................................................................................................................... 120
Table 23: Definition of leaks according to DIN 3761............................................................................................ 121

1 Safety information
B 1050 en-3921 13
1 Safety information
1.1 Intended use
These gear units are used to transmit rotary movements. They convert velocity and torque. They are
intended for use as part of a drive system in commercially used plant and machinery. The gear units
must not be operated until it has been established that the plant or machinery can be safely operated
with the gear unit. Suitable protective measures must be provided if failure of a gear unit or a geared
motor could result in a risk to persons. The machine or system must comply with local legislation and
directives. All applicable health and safety requirements must be met. In particular, the Machinery
Directive 2006/42/EC, TR CU 010/2011 and the TR CU 020/2011 must be especially observed in the
relevant areas of application.
The gear units may not be used in environments in which an explosive atmosphere can occur.
The gear units may only be used according to the information in the technical documentation from
Getriebebau NORD GmbH & Co. KG. Damage to the gear unit may result if the gear unit is not used
as intended and according to the information in the operating and assembly manual. This may also
result in personal injury.
The base or the gear unit mount must be appropriately designed for the weight and torque. All of the
fastenings provided must be used.
Some gear units are equipped with a cooling coil. These gear units may only be operated if the cooling
circuit is connected and in operation.
1.2 Do not make any modifications.
Do not make any structural modifications to the gear unit. Do not remove any protective guards.
1.3 Performing inspection and maintenance work
Due to lack of maintenance and damage, malfunctions may occur which can result in personal injury.
• Carry out all servicing and maintenance work at the specified intervals.
• Also note that servicing is necessary after long storage periods prior to commissioning.
• Do not operate damaged gear units. The gear unit must not have any leaks.
1.4 Personnel qualification
All transport, storage, installation, commissioning and maintenance work must be carried out by
qualified specialist personnel.
Qualified specialist personnel are persons who have the training and experience to recognise and
avoid any possible risks.

Industrial gear units – Manual with installation instructions
14 B 1050 en-3921
1.5 Safety for particular activities
1.5.1 Check for transport damage
Transport damage may cause malfunctions of the gear unit, which may cause personal injury. Oil
which escapes due to leaks may cause a slipping hazard.
• Check the packaging and the gear unit for transport damage.
• Do not operate damaged gear units.
1.5.2 Safety information for installation and maintenance
Before starting work on the gear unit disconnect the drive from the power supply and secure it against
accidental switch-on. Allow the gear unit to cool down. Depressurise the cooling circuit lines.
Damaged or defective components, attachment adapters, flanges and covers may have sharp edges.
Wear work gloves and work clothing.
1.6 Hazards
1.6.1 Hazards when lifting
Persons may be injured by falling or swinging gear units. Therefore also observe the following
information:
• Cordon off a wide area around the hazard area. Take care that there is adequate space to avoid
swinging loads.
• Never stand under suspended loads.
• Use adequately dimensioned means of transport which are suitable for the purpose. The weight of
the gear unit can be obtained from the type plate.
• Gear units may only be transported with shackles and lifting straps/chains at an angle of 90° to 70°
to the horizontal. Do not use the eye bolts on the motor for lifting if a motor is fitted to the gear unit.
The eye bolts are not designed for lifting the motor with heavy attachments. Pay attention to the
section 3.1 "Transporting the gear unit".
1.6.2 Hazards due to rotating parts
Rotating parts cause a risk of entanglement. This may lead to severe injuries such as crushing or
strangling.
• Provide contact protection. In addition to shafts, this also applies to fans as well as drives and
driven elements such as belt drives, chain drives, shrink discs and couplings. Take possible run-on
of the machine into consideration for the design of protective devices.
• Do not operate the drive without covers or hoods.
• Secure the drive to prevent activation during installation and maintenance work.
• For test operation do not switch on the drive without an installed driven element or secure the
motor shaft key.
• Also observe the safety information in the operating and installation instructions provided by
manufacturers of components supplied.

1 Safety information
B 1050 en-3921 15
1.6.3 Danger on entry
Persons may fall and be seriously injured when standing on the gear unit.
• Only stand on the gear unit for maintenance and repair work and only when the gear unit is at a
standstill.
• Never stand on shaft journals, protective covers, attachments and piping.
1.6.4 Hazards due to high or low temperatures
The gear unit may heat up to 90 °C during operation. Touching hot surfaces or contact with hot oil may
result in burns. At very low ambient temperatures freezing may occur on contact.
• Only touch the gear unit when wearing gloves after operation or at very low ambient temperatures.
• Before starting maintenance work, allow the gear unit to cool down sufficiently after operation.
• Provide a contact guard if there is a risk that persons may touch the gear unit when it is in
operation.
• Bursts of hot oil mist may be emitted from the pressure vent screw during operation. Provide a
suitable guard so that persons cannot be injured by this.
• Do not place any flammable materials on the gear unit.
1.6.5 Hazards due to lubricants and other substances
Chemical substances which are used with the gear unit may be toxic. Eye injuries may result if these
substances enter the eyes. Lubricants and adhesives may cause skin irritation.
Oil mist may escape when vent screws are opened.
Due to lubricants and conservation materials, gear units may be slippery and slip out of the hands.
There is a slipping hazard from spilled lubricants.
• When working with chemical substances wear chemical-resistant gloves and work clothing. Wash
your hands after working.
• Wear protective goggles if there is a possibility of splashed chemicals, for example when filling oil
or during cleaning work.
• If chemicals enter the eyes, rinse with large amounts of cold water immediately. Consult a
physician in case of symptoms.
• Observe the safety data sheets for the chemicals. Keep the safety data sheets in the vicinity of the
gear unit.
• Collect spilled lubricants immediately with a binding agent.
1.6.6 Hazards due to noise
Some gear units or attached components may cause hazardous noise levels during operation. Wear
hearing protection if work has to be carried out close to such gear units.
1.6.7 Hazards due to pressurised coolants
The cooling system is under high pressure. Damage or opening a cooling line which is under pressure
may result in injury. Depressurise the cooling circuit before working on the gear unit.

Industrial gear units – Manual with installation instructions
16 B 1050 en-3921
2 Description of gear units
2.1 Type designations and gear unit types
Gear unit types/ Type designations
Parallel gear units
2-stage 3-stage
SK 5207
SK 5307
SK 6207 SK 6307
SK 7207
SK 7307
SK 8207
SK 8307
SK 9207 SK 9307
SK 10207
SK 10307
SK 11207
SK 11307
SK 12207 SK 12307
SK 13207
SK 13307
SK 14207
SK 14307
SK 15207 SK 15307
Helical bevel gear unit
2-stage 3-stage 4-stage
SK 5217
SK 5407
SK 5507
SK 6217 SK 6407 SK 6507
SK 7217
SK 7407
SK 7507
SK 8217
SK 8407
SK 8507
SK 9217 SK 9407 SK 9507
SK 10217
SK 10407
SK 10507
SK 11217
SK 11407
SK 11507
SK 12407 SK 12507
SK 13407
SK 13507
SK 14407
SK 14507
SK 15407
SK 15507
Table 2: Type designations and gear unit types
Double gear units consist of two single gear units. The type designation of the SK 13307/7282 double
gear unit, for example, means that the double gear unit consists of the single gear units SK 13307 and
SK 7282. For the attached gear units, note the documentation B 1000.
SK 5418 gear units are 3-stage gear units with an angled stage.
SK xx319 gear units are 3-stage gear units with extended axle spacing.

2 Description of gear units
B 1050 en-3921 17
Figure 1: MAXXDRIVE®XT 2-stage helical bevel gear unit

Industrial gear units – Manual with installation instructions
18 B 1050 en-3921
Abbreviation
Description
A
Hollow output shaft
B
Fastening element
CC
Cooling coil
CS1-X
Cooling system oil/water
CS2-X
Cooling system oil/air
D
Torque support
DB
Drying agent filter
DRY
Additional measures against oil leak for mounting position M5 (True Drywell) with standard
bearings
EA
Splined hollow output shaft
ED
Elastic torque arm (details on name plate D)
EF
Cellulose filter
EV
Splined solid output shaft
EW
Splined drive shaft
F
B14 output flange
FAN-A
Axial fan
FAN-R
Radial fan
FK
B5 output flange
FV
Ventilation filter
F1
Drive flange
H
Cover cap
H66
IP66 cover
IEC
Standard IEC motor mounting
KL2
Agitator version
- Standard bearings
KL3
Agitator version
- Standard bearings
- Drywell
KL4
Agitator version
- Standard bearings
- True Drywell
KL6
Agitator version
- Standard bearings
- True Drywell
- Foot mounting
L
Solid output shaft on both sides
LC
Lubricant circulation with oil injection for roller bearings, oil level reduced
LCX
Lubricant circulation with oil injection for roller bearings and gearing, oil level greatly
reduced
M
GRIPMAXX™
MC
Motor bracket
MF…
Motor base frame
MFB
Motor base frame with brake
MFK
Motor base frame with elastic coupling
MFT
Motor base frame with hydrodynamic coupling
MO
Measuring devices and sensors
MS…
Motor swing base
MSB
Motor swing base with brake
MSK
Motor swing base with elastic coupling
MST
Motor swing base with hydrodynamic coupling
MT
Motor mount
NEMA
Standard NEMA motor attachment
OH
Oil heater
Oil sight glass
Oil inspection glass

2 Description of gear units
B 1050 en-3921 19
Abbreviation
Description
Oil gauge
Oil level indicator
OT
Oil level tank
PT100
Temperature sensor
R
Back stop
S
Shrink disc
V
Solid output shaft
VL
Reinforced bearings
VL2
Agitator version
- Reinforced bearings
VL3
Agitator version
- Reinforced bearings
- Drywell
VL4
Agitator version
- Reinforced bearings
- True Drywell
VL5
Extruder flange version
VL6
Agitator version
- Reinforced bearings
- Drywell
- Foot mounting
W
Free drive shaft
W2
Two free drive shaft journals
W3
Three free drive shaft journals
WG
First stage gear unit
WX
Auxiliary drive unit
Table 3: Versions and options

Industrial gear units – Manual with installation instructions
20 B 1050 en-3921
2.2 Name plate
The name plate must be firmly attached to the gear unit and must not be subjected to permanent
soiling. Please contact the NORD service department if the name plate is illegible or damaged.
Figure 2: Name plate
Explanation
1
DataMatrix code
8
Weight
2
NORD gear unit type
9
Overall gear unit ratio
3
Modes of operation
10
Installation position
4
Year of manufacture
11
Rated speed of gear unit output shaft
5 Serial number 12 Lubricant type, viscosity and quantity
6
Rated torque of gear unit output shaft
13
Customer part number
7
Drive power
14
Operating factor