Fein GRIT GHB 15-50 Setup guide

Grinding
34130561060
Printed in Germany
Repair instructions
Applies to:
GHB15-50 (A); GHB15-50 INOX (A)

Grinding
34130561060
Printed in Germany
Contents
C-SC_CSSM
Version 1.0_Template 1.0
01.12.2020
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FEIN retains all rights of disposal, such as copying and circulation.
Contents
1Models described ..............................................................................................................................5
2Technical data...................................................................................................................................6
3Symbols used....................................................................................................................................7
4Notes and requirements ....................................................................................................................8
5Safety instructions .............................................................................................................................9
6Tools, lubricants and auxiliary substances required.........................................................................11
6.1 Standard tools ..........................................................................................................................11
6.2 Special tools.............................................................................................................................12
6.3 Lubricants and auxiliary substances required...........................................................................12
7Test and diagnostics options ...........................................................................................................13
8Disassembly....................................................................................................................................14
8.1 Removing the handle ...............................................................................................................14
8.2 Removing the drive unit............................................................................................................15
8.3 Removing the handle (small)....................................................................................................17
8.4Removing the cover .................................................................................................................18
8.5 Removing the holder (handle) ..................................................................................................20
8.6 Disassembling the plate ...........................................................................................................21
8.6.1 Removing the tensioning arm............................................................................................21
8.6.2 Removing the support .......................................................................................................22
8.6.3 Removing the plate ...........................................................................................................24
8.6.4 Removing the gas compression spring..............................................................................25
8.6.5 Removing the drive wheel .................................................................................................26
8.6.6 Removing the contact wheel .............................................................................................28
8.6.7 Removing the spacer sleeves ...........................................................................................30
8.6.8 Removing the flange .........................................................................................................31
8.7 Removing the drive unit............................................................................................................32
8.7.1 Quick mains cable replacement.........................................................................................32
8.8 Disassembling the housing.......................................................................................................34
8.8.1 Removing the cover ..........................................................................................................34
8.8.2 Removing the switch .........................................................................................................35
8.8.3 Removing the carbon brushes...........................................................................................37
8.8.4 Removing the gearbox housing.........................................................................................38
8.9 Removing the motor .................................................................................................................39

Grinding
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Printed in Germany
Contents
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8.9.1 Removing the stator ..........................................................................................................39
8.9.2 Removing the armature.....................................................................................................41
8.9.3 Disassembling the armature..............................................................................................42
8.10 Removing the gearbox .............................................................................................................44
8.10.1 Removing the bearing plate...............................................................................................44
8.10.2 Disassembling the bearing plate........................................................................................45
8.10.3 Disassembling the gearbox housing..................................................................................47
9Assembly.........................................................................................................................................49
9.1 Fitting the plate.........................................................................................................................49
9.1.1 Fitting the flange................................................................................................................49
9.1.2 Fitting the spacer sleeves..................................................................................................50
9.1.3 Fitting the contact wheel....................................................................................................51
9.1.4 Fitting the drive wheel .......................................................................................................54
9.1.5 Fitting the support .............................................................................................................56
9.1.6 Fitting the gas compression spring ....................................................................................57
9.1.7 Fitting the plate..................................................................................................................59
9.1.8 Fitting the tensioning arm ..................................................................................................60
9.2 Fitting the holder (handle).........................................................................................................62
9.3Fitting the cover........................................................................................................................63
9.4 Fitting the handle (small) ..........................................................................................................64
9.5 Positioning the drive unit ..........................................................................................................65
9.6Assembling the handle .............................................................................................................67
9.7 Adjusting the support/belt run...................................................................................................68
9.8 Fitting the drive unit ..................................................................................................................70
9.8.1 Assembling the gearbox housing.......................................................................................70
9.8.2 Assembling the bearing plate ............................................................................................71
9.8.3 Positioning the bearing plate .............................................................................................73
9.9 Assembling the motor...............................................................................................................74
9.9.1 Assembling the armature...................................................................................................74
9.9.2 Positioning the armature ...................................................................................................75
9.9.3 Fitting the stator ................................................................................................................76
9.10 Assembling the housing ...........................................................................................................78
9.10.1 Positioning the gearbox housing........................................................................................78
9.10.2 Positioning the carbon brushes .........................................................................................79

Grinding
34130561060
Printed in Germany
Contents
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FEIN retains all rights of disposal, such as copying and circulation.
9.10.3 Fitting the switch ...............................................................................................................80
9.10.4 Fitting the cover.................................................................................................................82
9.11 Setting gearbox clearance........................................................................................................83
10 Inspection following repairs .............................................................................................................84

Grinding
34130561060
Printed in Germany
Models described
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1 Models described
These repair instructions describe how to repair the following models:
Model
Material number
GHB15-50 (A)
7 245 01.. .. .
GHB15-50 INOX (A)
7 245 02.. .. .

Grinding
34130561060
Printed in Germany
Technical data
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FEIN retains all rights of disposal, such as copying and circulation.
2 Technical data
Technical data
The complete technical data can be found in the operating instructions for the model.
Special tools
The special tools catalogue can be found in the FEIN electronic information system.
Lubricants and auxiliary substances
The lubricants catalogue can be found in the FEIN electronic information system.
Lists of spare parts
Lists of spare parts and exploded views are available online in our spare parts catalogue, which can be
accessed via the FEIN website.
Connection diagram
The connection diagram can be found in the FEIN electronic information system.
Inspection following repairs
Further information about the inspection steps required after repairs can be found in the FEIN electronic
information system.
Documents required for further repair work
- FEIN lubricants catalogue
- FEIN special tools catalogue
- All relevant service communications

Grinding
34130561060
Printed in Germany
Symbols used
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3 Symbols used
Refers to measures for avoiding the risk of injuries.
Caution: danger of crushing.
Caution: danger of cutting.
ESD warning symbol to identify electrically sensitive components and parts.
Refers to information or instructions that should be followed. Non-observance can result in
damage or malfunctions.
Read the operating instructions.
This spare part must always be replaced after disassembly.
Indicates notes that provide information or instructions that may provide a better understanding
and contribute to the more effective use of the product.
Part of the navigation interface.

Grinding
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Notes and requirements
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4 Notes and requirements
Please note
These instructions are only intended for persons with suitable technical training. It is assumed that the
reader has mechanical and electrical training.
Only use original FEIN spare parts!
Read the operating instructions for the product before carrying out any repair work.
Provisions
Please note that power tools may only be repaired, maintained and checked by a trained electrician, as
improper repair can result in serious risks to the user.
Outside Germany, the regulations applicable in the respective individual country must be observed.
The provisions set out in DIN VDE 0701-0702 should be observed after repairs.
The relevant accident prevention regulations are to be observed during commissioning.
The German Equipment and Product Safety Act [ProdSG] applies for correct use.
Disclaimer
The content of this documentation has been carefully reviewed and produced to the best of our knowledge.
C. & E. Fein GmbH assumes no responsibility for the completeness, relevance, quality or correctness of the
information provided.
Liability claims against C. & E. Fein GmbH that relate to material or immaterial damage caused by the use
or failure to use the information provided or by the use of incorrect or incomplete information are excluded.
Claims relating to acts committed intentionally or through gross negligence are categorically excluded.

Grinding
34130561060
Printed in Germany
Safety instructions
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FEIN retains all rights of disposal, such as copying and circulation.
5 Safety instructions
5.1 Structure
5.2 Danger classification
Warning
This warning refers to a dangerous situation. If the situation is not avoided, this may result in severe injuries
or death.
Caution
This warning refers to a potentially dangerous situation. If the situation is not avoided, this may result in
slight or minor injuries. This may also be used as a warning against material damage.
Please note
Indicates a potentially harmful situation. If this situation is not avoided, the product or an object in its
environment could be damaged.
Signal word for the danger classification.
Type and source of the danger.
Possible consequences.
Measure that must be taken in order to avoid this danger.
Warning!
Type and source of the danger.
Possible consequences.
Measure that must be taken in order to avoid this danger.
Caution!
Type and source of the danger.
Possible consequences.
Measure that must be taken in order to avoid this danger.
Please note:
Type and source of the danger.
Damage to the product or its environment.
Measure that must be taken in order to avoid this danger.

Grinding
34130561060
Printed in Germany
Safety instructions
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FEIN retains all rights of disposal, such as copying and circulation.
5.3 Information
Indicates notes that provide information or instructions that may provide a better understanding and
contribute to the more effective use of the product.
5.4 ESD protection
Damage from electrostatic charge.
Failure to comply with the safety regulations for ESD protection may cause damage to the electronics.
Only perform assembly/disassembly work on electronics at a workstation with ESD protection.
Information
Tip
ESD
Avoiding the failure of electronics

Grinding
34130561060
Printed in Germany
Tools, lubricants and auxiliary substances required
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FEIN retains all rights of disposal, such as copying and circulation.
6 Tools, lubricants and auxiliary substances required
6.1 Standard tools
Slotted screwdriver
small
Combination pliers
Plastic hammer
Torx
T15
T20
Punch
6 mm diameter; 12 mm diameter
Arbor press
Sleeve
35 mm inner diameter
19 mm outer diameter
14 mm inner diameter
29 mm outer diameter
22 mm inner diameter
42 mm outer diameter
30 mm inner diameter
20 mm outer diameter
15 mm inner diameter
27 mm outer diameter
15 mm inner diameter
4 x round material
20 mm in diameter
Length 60 mm
Socket head wrench
2.5 mm; 3 mm; 4 mm; 5 mm; 6 mm
Open-ended spanner
10 mm; 13 mm; 14 mm

Grinding
34130561060
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Tools, lubricants and auxiliary substances required
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6.2 Special tools
Drawing-off socket cap
64104150008
Chuck cone
19 mm diameter
64107019007
26 mm diameter
64107026000
Drawing-off plate
64102067005
Pipe
64101002004
Assembly aid
64122121010
Pressure piece
64122003000
6.3 Lubricants and auxiliary substances required
Grease
SM0001
29 g
Gearbox
Thread locking
compound
e.g. Loctite 243
n/a

Grinding
34130561060
Printed in Germany
Test and diagnostics options
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7 Test and diagnostics options
Test data
The permitted parameters for the machine can be found in the FEIN electronic information system.

Grinding
34130561060
Printed in Germany
Disassembly
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8 Disassembly
8.1 Removing the handle
Tools:
- Socket head wrench, 5 mm; 6 mm
- Open-ended spanner, 13 mm
1. Unscrew the two nuts (1).
2. Remove the handle (2).
3. Unscrew the screw (3).
4. Remove the holder (4).
3
1
4
1
2

Grinding
34130561060
Printed in Germany
Disassembly
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FEIN retains all rights of disposal, such as copying and circulation.
8.2 Removing the drive unit
Steps that must be completed:
- Removing the handle
Tools:
- Socket head wrench, 6 mm
- Open-ended spanner, 14 mm
1. Swivel the lever (1) to the right.
2. Remove the grinding belt (2).
3. Loosen the screw (3).
1
3
2

Grinding
34130561060
Printed in Germany
Disassembly
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FEIN retains all rights of disposal, such as copying and circulation.
8.2 Removing the drive unit
4. Press and hold the lock (1).
5. Loosen the drive wheel (2) using the spanner flat (3).
6. Remove the drive unit by turning the drive wheel (2).
3
1
3
2

Grinding
34130561060
Printed in Germany
Disassembly
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8.3 Removing the handle (small)
1. Unscrew the handle (1) from the bolt.
2. Remove the bolt (2).
2
1

Grinding
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Disassembly
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8.4 Removing the cover
Steps that must be completed:
- Remove drive unit
- Remove handles
Tools:
- Open-ended spanner, 10 mm
- Socket head wrench, 5 mm
1. Unscrew the two screws (1).
Information
Warm up the screws using a hot air gun
because they have been glued in with a thread locking
compound.
2. Unscrew the nut (2).
3. Remove the holder (3).
4. Unscrew the three screws (4).
5. Remove the holder (5) with the cover.
3
1
2
4
5

Grinding
34130561060
Printed in Germany
Disassembly
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8.4 Removing the cover
6. Unscrew the nut (1) and remove the holder (2).
Information
Replace the information sign (3) if damaged.
7. Unscrew the nuts (3).
8. Remove the eye guard (4).
1
4
2
3
3

Grinding
34130561060
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Disassembly
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8.5 Removing the holder (handle)
Steps that must be completed:
- Remove drive unit
- Removing the handle
- Remove cover
Tools:
- Socket head wrench, 4 mm
1. Unscrew the four screws (1).
2. Remove the holder (2).
Information
Warm up the screws using a hot air gun
because they have been glued in with a thread locking
compound.
2
1