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Ball Screw Support Unit Quick-Pick Cards (all 47, expandable dimensions)

Visual support-unit picker: filter by series and fixed/supported end, expand any card for housing and shaft-end machining dimensions across all 47 BK/EK/FK fixed-end and BF/EF/FF supported-end units.

All 47 support units; expand any card for full housing dimensions (D1/A/B/C/h/H/PCD/weight) and the matching screw shaft-end machining dimensions. Fixed ends (BK/EK/FK, blue) lock the axis; supported ends (BF/EF/FF, grey) allow axial float.

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Support unit cards

Fixed end (locks axis)Supported end (axial float)
BKFixed
BK-10
Screw shaft ⌀12,⌀14,⌀15
Shaft D1 10Body len A 60Pitch B 46Width C 34Centre h 22Height H 39Set screw M3Weight kg 0.39
Detail →

Housing dimensions · square

Shaft D110
Body len A60
Pitch B46
Width C34
Centre h22
Height H39
Set screwM3
Weight kg0.39

Shaft-end machining

Suitable screw dia⌀12,⌀14,⌀15
D10
D18
B39
E15
Locknut threadM10×1
BKFixed
BK-12
Screw shaft ⌀14,⌀15,⌀16,⌀18
Shaft D1 12Body len A 60Pitch B 46Width C 35Centre h 25Height H 43Set screw M4Weight kg 0.41
Detail →

Housing dimensions · square

Shaft D112
Body len A60
Pitch B46
Width C35
Centre h25
Height H43
Set screwM4
Weight kg0.41

Shaft-end machining

Suitable screw dia⌀14,⌀15,⌀16,⌀18
D12
D110
B39
E15
Locknut threadM12×1
BKFixed
BK-15
Screw shaft ⌀18,⌀20
Shaft D1 15Body len A 70Pitch B 54Width C 40Centre h 28Height H 48Set screw M4Weight kg 0.57
Detail →

Housing dimensions · square

Shaft D115
Body len A70
Pitch B54
Width C40
Centre h28
Height H48
Set screwM4
Weight kg0.57

Shaft-end machining

Suitable screw dia⌀18,⌀20
D15
D112
B40
E20
Locknut threadM15×1
BKFixed
BK-17
Screw shaft ⌀20,⌀25
Shaft D1 17Body len A 86Pitch B 68Width C 50Centre h 39Height H 64Set screw M5Weight kg 1.27
Detail →

Housing dimensions · square

Shaft D117
Body len A86
Pitch B68
Width C50
Centre h39
Height H64
Set screwM5
Weight kg1.27

Shaft-end machining

Suitable screw dia⌀20,⌀25
D17
D115
B53
E23
Locknut threadM17×1
BKFixed
BK-20
Screw shaft ⌀25,⌀28
Shaft D1 20Body len A 88Pitch B 70Width C 52Centre h 34Height H 60Set screw M5Weight kg 1.19
Detail →

Housing dimensions · square

Shaft D120
Body len A88
Pitch B70
Width C52
Centre h34
Height H60
Set screwM5
Weight kg1.19

Shaft-end machining

Suitable screw dia⌀25,⌀28
D20
D117
B53
E25
Locknut threadM20×1
BKFixed
BK-25
Screw shaft ⌀32,⌀36
Shaft D1 25Body len A 106Pitch B 85Width C 64Centre h 48Height H 80Set screw M6Weight kg 2.3
Detail →

Housing dimensions · square

Shaft D125
Body len A106
Pitch B85
Width C64
Centre h48
Height H80
Set screwM6
Weight kg2.3

Shaft-end machining

Suitable screw dia⌀32,⌀36
D25
D120
B65
E30
Locknut threadM25×1.5
BKFixed
BK-30
Screw shaft ⌀36,⌀40
Shaft D1 30Body len A 128Pitch B 102Width C 76Centre h 51Height H 89Set screw M6Weight kg 3.32
Detail →

Housing dimensions · square

Shaft D130
Body len A128
Pitch B102
Width C76
Centre h51
Height H89
Set screwM6
Weight kg3.32

Shaft-end machining

Suitable screw dia⌀36,⌀40
D30
D125
B72
E38
Locknut threadM30×1.5
BKFixed
BK-35
Screw shaft ⌀40,⌀45,⌀50
Shaft D1 35Body len A 140Pitch B 114Width C 88Centre h 52Height H 96Set screw M6Weight kg 4.33
Detail →

Housing dimensions · square

Shaft D135
Body len A140
Pitch B114
Width C88
Centre h52
Height H96
Set screwM6
Weight kg4.33

Shaft-end machining

Suitable screw dia⌀40,⌀45,⌀50
D35
D130
B83
E45
Locknut threadM35×1.5
BKFixed
BK-40
Screw shaft ⌀50,⌀55
Shaft D1 40Body len A 160Pitch B 130Width C 100Centre h 60Height H 110Set screw M8Weight kg 6.5
Detail →

Housing dimensions · square

Shaft D140
Body len A160
Pitch B130
Width C100
Centre h60
Height H110
Set screwM8
Weight kg6.5

Shaft-end machining

Suitable screw dia⌀50,⌀55
D40
D135
B98
E50
Locknut threadM40×1.5
EKFixed
EK-6
Screw shaft ⌀6,⌀8
Shaft D1 6Body len A 42Pitch B 30Width C 18Centre h 13Height H 25Set screw M3Weight kg 0.14
Detail →

Housing dimensions · round

Shaft D16
Body len A42
Pitch B30
Width C18
Centre h13
Height H25
Set screwM3
Weight kg0.14

Shaft-end machining

Suitable screw dia⌀6,⌀8
D6
D14
B30
E8
Locknut threadM6×0.75
EKFixed
EK-8
Screw shaft ⌀10,⌀12
Shaft D1 8Body len A 52Pitch B 38Width C 25Centre h 17Height H 32Set screw M3Weight kg 0.24
Detail →

Housing dimensions · round

Shaft D18
Body len A52
Pitch B38
Width C25
Centre h17
Height H32
Set screwM3
Weight kg0.24

Shaft-end machining

Suitable screw dia⌀10,⌀12
D8
D16
B35
E9
Locknut threadM8×1
EKFixed
EK-10
Screw shaft ⌀12,⌀14,⌀15
Shaft D1 10Body len A 70Pitch B 52Width C 36Centre h 25Height H 43Set screw M3Weight kg 0.46
Detail →

Housing dimensions · round

Shaft D110
Body len A70
Pitch B52
Width C36
Centre h25
Height H43
Set screwM3
Weight kg0.46

Shaft-end machining

Suitable screw dia⌀12,⌀14,⌀15
D10
D18
B36
E15
Locknut threadM10×1
EKFixed
EK-12
Screw shaft ⌀14,⌀15,⌀16
Shaft D1 12Body len A 70Pitch B 52Width C 36Centre h 25Height H 43Set screw M4Weight kg 0.44
Detail →

Housing dimensions · round

Shaft D112
Body len A70
Pitch B52
Width C36
Centre h25
Height H43
Set screwM4
Weight kg0.44

Shaft-end machining

Suitable screw dia⌀14,⌀15,⌀16
D12
D110
B36
E15
Locknut threadM12×1
EKFixed
EK-15
Screw shaft ⌀18,⌀20
Shaft D1 15Body len A 80Pitch B 60Width C 41Centre h 30Height H 49Set screw M4Weight kg 0.55
Detail →

Housing dimensions · round

Shaft D115
Body len A80
Pitch B60
Width C41
Centre h30
Height H49
Set screwM4
Weight kg0.55

Shaft-end machining

Suitable screw dia⌀18,⌀20
D15
D112
B49
E20
Locknut threadM15×1
EKFixed
EK-20
Screw shaft ⌀25,⌀28,⌀32
Shaft D1 20Body len A 95Pitch B 75Width C 56Centre h 30Height H 58Set screw M5Weight kg 1.35
Detail →

Housing dimensions · round

Shaft D120
Body len A95
Pitch B75
Width C56
Centre h30
Height H58
Set screwM5
Weight kg1.35

Shaft-end machining

Suitable screw dia⌀25,⌀28,⌀32
D20
D117
B64
E25
Locknut threadM20×1
EKFixed
EK-25
Screw shaft ⌀32,⌀36
Shaft D1 25Body len A 105Pitch B 85Width C 66Centre h 35Height H 68Set screw M6Weight kg 1.92
Detail →

Housing dimensions · round

Shaft D125
Body len A105
Pitch B85
Width C66
Centre h35
Height H68
Set screwM6
Weight kg1.92

Shaft-end machining

Suitable screw dia⌀32,⌀36
D25
D120
B65
E30
Locknut threadM25×1.5
FKFixed
FK-6
Screw shaft ⌀8,⌀10
Shaft D1 6Flange sq A 36Height H 7Bolt circle 28Set screw M3Weight kg 0.08
Detail →

Housing dimensions · flange

Shaft D16
Flange sq A36
Height H7
Bolt circle28
Set screwM3
Weight kg0.08

Shaft-end machining

Suitable screw dia⌀8,⌀10
D6
D14
B30
E8
Locknut threadM6×0.75
FKFixed
FK-8
Screw shaft ⌀10,⌀12
Shaft D1 8Flange sq A 43Height H 9Bolt circle 35Set screw M3Weight kg 0.15
Detail →

Housing dimensions · flange

Shaft D18
Flange sq A43
Height H9
Bolt circle35
Set screwM3
Weight kg0.15

Shaft-end machining

Suitable screw dia⌀10,⌀12
D8
D16
B35
E9
Locknut threadM8×1
FKFixed
FK-10
Screw shaft ⌀12,⌀14,⌀15
Shaft D1 10Flange sq A 52Height H 10Bolt circle 42Set screw M3Weight kg 0.25
Detail →

Housing dimensions · flange

Shaft D110
Flange sq A52
Height H10
Bolt circle42
Set screwM3
Weight kg0.25

Shaft-end machining

Suitable screw dia⌀12,⌀14,⌀15
D10
D18
B36
E15
Locknut threadM10×1
FKFixed
FK-12
Screw shaft ⌀14,⌀15,⌀16
Shaft D1 12Flange sq A 54Height H 10Bolt circle 44Set screw M4Weight kg 0.26
Detail →

Housing dimensions · flange

Shaft D112
Flange sq A54
Height H10
Bolt circle44
Set screwM4
Weight kg0.26

Shaft-end machining

Suitable screw dia⌀14,⌀15,⌀16
D12
D110
B36
E15
Locknut threadM12×1
FKFixed
FK-15
Screw shaft ⌀18,⌀20
Shaft D1 15Flange sq A 63Height H 15Bolt circle 50Set screw M4Weight kg 0.4
Detail →

Housing dimensions · flange

Shaft D115
Flange sq A63
Height H15
Bolt circle50
Set screwM4
Weight kg0.4

Shaft-end machining

Suitable screw dia⌀18,⌀20
D15
D112
B49
E20
Locknut threadM15×1
FKFixed
FK-20
Screw shaft ⌀25,⌀28
Shaft D1 20Flange sq A 85Height H 22Bolt circle 70Set screw M5Weight kg 1.2
Detail →

Housing dimensions · flange

Shaft D120
Flange sq A85
Height H22
Bolt circle70
Set screwM5
Weight kg1.2

Shaft-end machining

Suitable screw dia⌀25,⌀28
D20
D117
B64
E25
Locknut threadM20×1
FKFixed
FK-25
Screw shaft ⌀32,⌀36
Shaft D1 25Flange sq A 98Height H 27Bolt circle 80Set screw M6Weight kg 1.6
Detail →

Housing dimensions · flange

Shaft D125
Flange sq A98
Height H27
Bolt circle80
Set screwM6
Weight kg1.6

Shaft-end machining

Suitable screw dia⌀32,⌀36
D25
D120
B76
E30
Locknut threadM25×1.5
FKFixed
FK-30
Screw shaft ⌀40,⌀50
Shaft D1 30Flange sq A 117Height H 30Bolt circle 95Set screw M6Weight kg 2.38
Detail →

Housing dimensions · flange

Shaft D130
Flange sq A117
Height H30
Bolt circle95
Set screwM6
Weight kg2.38

Shaft-end machining

Suitable screw dia⌀40,⌀50
D30
D125
B72
E38
Locknut threadM30×1.5
BFSupported
BF-10
Screw shaft ⌀12,⌀14,⌀15
Shaft D1 8Body len A 60Pitch B 46Width C 34Centre h 22Height H 39Weight kg 0.29
Detail →

Housing dimensions · square

Shaft D18
Body len A60
Pitch B46
Width C34
Centre h22
Height H39
Weight kg0.29

Shaft-end machining

Suitable screw dia⌀12,⌀14,⌀15
D18
E10
BFSupported
BF-12
Screw shaft ⌀14,⌀15,⌀16
Shaft D1 10Body len A 60Pitch B 46Width C 35Centre h 25Height H 43Weight kg 0.3
Detail →

Housing dimensions · square

Shaft D110
Body len A60
Pitch B46
Width C35
Centre h25
Height H43
Weight kg0.3

Shaft-end machining

Suitable screw dia⌀14,⌀15,⌀16
D110
E11
BFSupported
BF-15
Screw shaft ⌀18,⌀20
Shaft D1 15Body len A 70Pitch B 54Width C 40Centre h 28Height H 48Weight kg 0.38
Detail →

Housing dimensions · square

Shaft D115
Body len A70
Pitch B54
Width C40
Centre h28
Height H48
Weight kg0.38

Shaft-end machining

Suitable screw dia⌀18,⌀20
D115
E13
BFSupported
BF-17
Screw shaft ⌀20,⌀25
Shaft D1 17Body len A 86Pitch B 68Width C 50Centre h 39Height H 64Weight kg 0.74
Detail →

Housing dimensions · square

Shaft D117
Body len A86
Pitch B68
Width C50
Centre h39
Height H64
Weight kg0.74

Shaft-end machining

Suitable screw dia⌀20,⌀25
D117
E16
BFSupported
BF-20
Screw shaft ⌀25,⌀28
Shaft D1 20Body len A 88Pitch B 70Width C 52Centre h 34Height H 60Weight kg 0.76
Detail →

Housing dimensions · square

Shaft D120
Body len A88
Pitch B70
Width C52
Centre h34
Height H60
Weight kg0.76

Shaft-end machining

Suitable screw dia⌀25,⌀28
D120
E16
BFSupported
BF-25
Screw shaft ⌀32,⌀36
Shaft D1 25Body len A 106Pitch B 85Width C 64Centre h 48Height H 80Weight kg 1.42
Detail →

Housing dimensions · square

Shaft D125
Body len A106
Pitch B85
Width C64
Centre h48
Height H80
Weight kg1.42

Shaft-end machining

Suitable screw dia⌀32,⌀36
D125
E20
BFSupported
BF-30
Screw shaft ⌀36,⌀40
Shaft D1 30Body len A 128Pitch B 102Width C 76Centre h 51Height H 89Weight kg 1.97
Detail →

Housing dimensions · square

Shaft D130
Body len A128
Pitch B102
Width C76
Centre h51
Height H89
Weight kg1.97

Shaft-end machining

Suitable screw dia⌀36,⌀40
D130
E21
BFSupported
BF-35
Screw shaft ⌀40,⌀45,⌀50
Shaft D1 35Body len A 140Pitch B 114Width C 88Centre h 52Height H 96Weight kg 2.22
Detail →

Housing dimensions · square

Shaft D135
Body len A140
Pitch B114
Width C88
Centre h52
Height H96
Weight kg2.22

Shaft-end machining

Suitable screw dia⌀40,⌀45,⌀50
D135
E22
BFSupported
BF-40
Screw shaft ⌀50,⌀55
Shaft D1 40Body len A 160Pitch B 130Width C 100Centre h 60Height H 110Weight kg 3.27
Detail →

Housing dimensions · square

Shaft D140
Body len A160
Pitch B130
Width C100
Centre h60
Height H110
Weight kg3.27

Shaft-end machining

Suitable screw dia⌀50,⌀55
D140
E23
EFSupported
EF-6
Screw shaft ⌀6,⌀8
Shaft D1 6Body len A 42Pitch B 30Width C 18Centre h 13Height H 25Weight kg 0.1
Detail →

Housing dimensions · round

Shaft D16
Body len A42
Pitch B30
Width C18
Centre h13
Height H25
Weight kg0.1

Shaft-end machining

Suitable screw dia⌀6,⌀8
D16
E9
EFSupported
EF-8
Screw shaft ⌀10,⌀12
Shaft D1 6Body len A 52Pitch B 38Width C 25Centre h 17Height H 32Weight kg 0.16
Detail →

Housing dimensions · round

Shaft D16
Body len A52
Pitch B38
Width C25
Centre h17
Height H32
Weight kg0.16

Shaft-end machining

Suitable screw dia⌀10,⌀12
D16
E9
EFSupported
EF-10
Screw shaft ⌀12,⌀14,⌀15
Shaft D1 8Body len A 70Pitch B 52Width C 36Centre h 25Height H 43Weight kg 0.35
Detail →

Housing dimensions · round

Shaft D18
Body len A70
Pitch B52
Width C36
Centre h25
Height H43
Weight kg0.35

Shaft-end machining

Suitable screw dia⌀12,⌀14,⌀15
D18
E10
EFSupported
EF-12
Screw shaft ⌀14,⌀15,⌀16
Shaft D1 10Body len A 70Pitch B 52Width C 36Centre h 25Height H 43Weight kg 0.35
Detail →

Housing dimensions · round

Shaft D110
Body len A70
Pitch B52
Width C36
Centre h25
Height H43
Weight kg0.35

Shaft-end machining

Suitable screw dia⌀14,⌀15,⌀16
D110
E11
EFSupported
EF-15
Screw shaft ⌀18,⌀20
Shaft D1 15Body len A 80Pitch B 60Width C 41Centre h 30Height H 49Weight kg 0.4
Detail →

Housing dimensions · round

Shaft D115
Body len A80
Pitch B60
Width C41
Centre h30
Height H49
Weight kg0.4

Shaft-end machining

Suitable screw dia⌀18,⌀20
D115
E13
EFSupported
EF-20
Screw shaft ⌀25,⌀28
Shaft D1 20Body len A 95Pitch B 75Width C 56Centre h 30Height H 58Weight kg 0.65
Detail →

Housing dimensions · round

Shaft D120
Body len A95
Pitch B75
Width C56
Centre h30
Height H58
Weight kg0.65

Shaft-end machining

Suitable screw dia⌀25,⌀28
D120
E19
EFSupported
EF-25
Screw shaft ⌀32,⌀36
Shaft D1 25Body len A 105Pitch B 85Width C 66Centre h 35Height H 68Weight kg 0.95
Detail →

Housing dimensions · round

Shaft D125
Body len A105
Pitch B85
Width C66
Centre h35
Height H68
Weight kg0.95

Shaft-end machining

Suitable screw dia⌀32,⌀36
D125
E20
FFSupported
FF-6
Screw shaft ⌀10,⌀12
Shaft D1 6Flange sq A 36Height H 6Bolt circle 28Weight kg 0.08
Detail →

Housing dimensions · flange

Shaft D16
Flange sq A36
Height H6
Bolt circle28
Weight kg0.08

Shaft-end machining

Suitable screw dia⌀10,⌀12
D16
E9
FFSupported
FF-10
Screw shaft ⌀12,⌀14,⌀15
Shaft D1 8Flange sq A 43Height H 7Bolt circle 35Weight kg 0.1
Detail →

Housing dimensions · flange

Shaft D18
Flange sq A43
Height H7
Bolt circle35
Weight kg0.1

Shaft-end machining

Suitable screw dia⌀12,⌀14,⌀15
D18
E10
FFSupported
FF-12
Screw shaft ⌀14,⌀15,⌀16
Shaft D1 10Flange sq A 52Height H 7Bolt circle 42Weight kg 0.15
Detail →

Housing dimensions · flange

Shaft D110
Flange sq A52
Height H7
Bolt circle42
Weight kg0.15

Shaft-end machining

Suitable screw dia⌀14,⌀15,⌀16
D110
E11
FFSupported
FF-15
Screw shaft ⌀18,⌀20
Shaft D1 15Flange sq A 63Height H 9Bolt circle 50Weight kg 0.22
Detail →

Housing dimensions · flange

Shaft D115
Flange sq A63
Height H9
Bolt circle50
Weight kg0.22

Shaft-end machining

Suitable screw dia⌀18,⌀20
D115
E13
FFSupported
FF-20
Screw shaft ⌀25,⌀28
Shaft D1 20Flange sq A 85Height H 11Bolt circle 70Weight kg 0.45
Detail →

Housing dimensions · flange

Shaft D120
Flange sq A85
Height H11
Bolt circle70
Weight kg0.45

Shaft-end machining

Suitable screw dia⌀25,⌀28
D120
E19
FFSupported
FF-25
Screw shaft ⌀32,⌀36
Shaft D1 25Flange sq A 98Height H 14Bolt circle 80Weight kg 0.66
Detail →

Housing dimensions · flange

Shaft D125
Flange sq A98
Height H14
Bolt circle80
Weight kg0.66

Shaft-end machining

Suitable screw dia⌀32,⌀36
D125
E20
FFSupported
FF-30
Screw shaft ⌀40,⌀50
Shaft D1 30Flange sq A 117Height H 18Bolt circle 95Weight kg 1.05
Detail →

Housing dimensions · flange

Shaft D130
Flange sq A117
Height H18
Bolt circle95
Weight kg1.05

Shaft-end machining

Suitable screw dia⌀40,⌀50
D130
E21

Showing：47 units

FAQ

How do I tell fixed and supported ends apart?
The fixed end (BK/EK/FK) uses back-to-back angular-contact bearings to lock the axis and locate the screw; the supported end (BF/EF/FF) uses deep-groove bearings for radial support only and allows thermal float.
What are square, round and flange types?
BK/BF are square (base mount); EK/EF are round (compact axially); FK/FF are flange type (four-side mount, high overturning resistance).
Is D1 the same as the suitable screw shaft diameter?
No. D1 is the housing bearing bore (BK-10 has D1=10, taking a 7000 bearing with a 10 mm bore); the suitable screw diameter is the screw shaft itself (BK-10 suits 12/14/15 mm). The two differ by the bearing bore.
Support Unit GuideSeries Match TableBearing Load ChartShaft-End MachiningFull Model List

Source: MOSIONX 2026 general catalogue, chapter G (support-unit dimensions and Tables 1.1.1 / 1.1.2).

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