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Ball Splines / Both Ends Tapped

Ball Splines / Both Ends Tapped

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Dimensional Drawing

Flange type nut orientation
● 1-Nut Type
● 2-Nut Type
[ ! ] When selecting Overall Length (L Dimension), check the annealing range. 
[ ! ] For the included nut, please select a shape from below.
 
■Round Flanged
 
■Compact Flanged
 
■Straight Nuts 
[A]Dimension of Included Key
[ ! ] Do not machine the nut as it will adversely affect accuracy.
[ ! ] The key is press fit into the nut.
One End
Tapped		Spline Shaft [M] EN 1.3505 Equiv., Nut [M] EN 1.7242 Equiv.
[H]Hardness: 58HRC or more		Spline Shaft and Nut [M] Material: EN 1.4125 Equiv.
[H]Hardness: 55 HRC or more
Nut 1 pc.Nut 1 pc.
With Round Flange NutBSFMBSFMS
With Compact Flange NutBSFN—
With Straight NutBSFSBSFSS
[ ! ] Hardening of this product is induction hardening. (Depth: Approx. 1 mm to 2 mm)

[ ! ] Spline Shafts are hardened, and need to be annealed before machining.

[ ! ] As the accuracy is guaranteed as a set of nut and shaft, they are not sold separately.

[ ! ] A dust-proof seal is attached to the nut, so the balls will not fall off even if the spline shaft is pulled out.
(If the spline shaft is inserted at an angle to the nut, the ball may fall out.)

Specification Table

Part Number—L—M
BSFS10
Ball Splines - One End Tapped: Related ImageBSFS10G
Ball Splines - One End Tapped: Related ImageBSFS10L		—
—
—		350
350
350		—
—
—		M5
M5
M5
Alternative grease types are available.
■Spline Shafts
Part NumberL: 1 mm IncrementsM (Coarse)
Selection		DMass
(kg/m)
TypeNo.1-Nut Type
BSFM
BSFN
BSFS
BSFMS
BSFSS		* 660 to 500 (190)3       60.23
* 860 to 600 (190)34      80.39
* 1060 to 800 (390)345     10.40.65
* 1360 to 800 (390) 456    13.41.11
* 1670 to 1000 (390) 4568   16.61.65
2080 to 1000  56810  20.62.57
2590 to 1300  5681012 25.84.04
30100 to 1300   6810121630.85.85
[ ! ] For BSFMS and BSFSS, only * marked sizes are available, and the Max. L dimension is in ( ).
[ ! ] For BSFN, only No. 6, 8 and 10 are available.
[ ! ] Operating Temp.: Plastic components are used in ball spline assemblies. Avoid using in high temperature environments: keep below 80°C.

[ ! ] Lubrication: Ball splines are lubricated at the time of shipment, but should be re-lubricated after installation in equipment.
After you start using the vehicle, fill the grease every 100 km.
For re-lubrication, Lithium soap-based grease (Alvania Grease S2 by Showa Shell Sekiyu) is recommended.

■Round Flange Nuts, Compact Flange Nuts
No.D
(h6)		LdfHP.C.D.d1d2hWdBBasic Rated TorqueBasic Load RatingAllowable Static MomentMass
(kg)
Dynamic Ct
(N⋅m)		Static C0 t
(N⋅m)		Dynamic C
(kN)		Static C0
(kN)		M01
(N⋅m)		M02
(N⋅m)
61425306223.563.16.51.5183.871.22.15360.03
8163224214.88.71.22.15360.04
102140 (33)42 (41)6 (8)32 (30)4.584.4 (5.3)14 (8.5)2519 (11)34 (21)3.8 (2.4)6.9 (4.3)26 (15)181 (102)0.09
132444 (36)44 (45)7 (8)33 (34)15 (10)—28 (20)52 (37)4.6 (3.3)8.3 (5.9)36 (22)251 (148)0.11
163150517404.41851936.211.1563860.2
203563589455.59.55.422.52851548.515.3836110.3
254271655226.519334815.427.717312480.4
3047807510606.6116.5302.527249018.533.321215810.57
[!] Dimensions in () are for EN 1.4125 Equiv. [!] Allowable static moment M01 are values measured when a single nut is used, and M02 are values measured when two nuts are used in contact.
■Straight Nuts
No.D
(h6)		Lb t
(+0.05
0)		dαBasic Rated TorqueBasic Load RatingAllowable Static MomentMass
(kg)		Dimensions of Key (Included)
ToleranceDynamic Ct
(N⋅m)		Static C0 t
(N⋅m)		Dynamic C
(kN)		Static C0
(kN)		M01
(N⋅m)		M02
(N⋅m)		B h L1R
ToleranceTolerance
614252.5+0.014
0		1.21.515°3.871.22.15360.0122.5+0.016
+0.006		2.50
−0.025		10.51.25
81625°4.88.71.22.15360.01310.5
102140 (33)31.5—19 (11)34 (21)3.8 (2.4)6.9 (4.3)26 (15)181 (102)0.063317 (14)1.5
132444 (36)28 (20)52 (37)4.6 (3.3)8.3 (5.9)36 (22)251 (148)0.0717 (14)
1631503.5+0.018
0		251936.211.1563860.153.5+0.024
+0.012		3.50
−0.030		181.75
20356342.52851548.515.3836110.244292
25427119334815.427.717312480.2933
3047802.527249018.533.321215810.3742
[!] Dimensions in () are for EN 1.4125 Equiv. [!] Allowable static moment M01 are values measured when a single nut is used, and M02 are values measured when two nuts are used in contact.

Alterations

Part Number—L—M—(SC·FC·NTW)
BSFS10—350—M5—SC15
AlterationsWrench FlatsSet Screw FlatAdditional Spline Nuts
CodeSCFCNTW
Spec.
Adds a wrench flat.   
SC = 1 mm Increments
[ ! ] SC+ℓ1 ≤ L
No.Wℓ1
658
87
108
131110
1614
2017
252215
3027
Adds a set screw flat.
Ordering Code FC10-A8
FC, A = 1 mm Increments
[ ! ] FC ≤ 3 × D
[ ! ] 1.5 × D < FC
When 1.5 x D < FC, FC ≤ L/2
[ ! ] A = 0 or
A ≥ 2
No.h
61
8
10
13
16
202
25
30
Adds a nut.
(from one to two)
[ ! ] BSFS·BSFM
Applicable to BSFN only
[ ! ] When selecting multiple alterations, the distance between machined areas should be 2 mm or more.
[ ! ] The angles / positions of alterations such as wrench flats, set screw flat, and keyway are not on the same plane.
[ ! ] It is not possible to specify the key of the spline nut or the positional relationship between the mounting hole and alteration.

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  1. 1
Part Number
BSFM6-[60-400/1]-M3
BSFM6G-[60-400/1]-M3
BSFM6L-[60-400/1]-M3
BSFM8-[60-400/1]-M[3,​4]
BSFM8G-[60-400/1]-M[3,​4]
BSFM8L-[60-400/1]-M[3,​4]
BSFM10-[60-600/1]-M[3,​4,​5]
BSFM10G-[60-600/1]-M[3,​4,​5]
BSFM10L-[60-600/1]-M[3,​4,​5]
BSFM13-[60-600/1]-M[4,​5,​6]
BSFM13G-[60-600/1]-M[4,​5,​6]
BSFM13L-[60-600/1]-M[4,​5,​6]
BSFM16-[70-600/1]-M[4,​5,​6,​8]
BSFM16G-[70-600/1]-M[4,​5,​6,​8]
BSFM16L-[70-600/1]-M[4,​5,​6,​8]
BSFM20-[80-700/1]-M[5,​6,​8,​10]
BSFM20G-[80-700/1]-M[5,​6,​8,​10]
BSFM20L-[80-700/1]-M[5,​6,​8,​10]
BSFM25-[90-1300/1]-M[5,​6,​8,​10,​12]
BSFM25G-[90-900/1]-M[5,​6,​8,​10,​12]
BSFM25L-[90-900/1]-M[5,​6,​8,​10,​12]
BSFM30-[100-1150/1]-M[6,​8,​10,​12,​16]
BSFM30G-[100-1150/1]-M[6,​8,​10,​12,​16]
BSFM30L-[100-1150/1]-M[6,​8,​10,​12,​16]
BSFMS6-[60-190/1]-M3
BSFMS6G-[60-190/1]-M3
BSFMS6L-[60-190/1]-M3
BSFMS8-[60-190/1]-M[3,​4]
BSFMS8G-[60-190/1]-M[3,​4]
BSFMS8L-[60-190/1]-M[3,​4]
BSFMS10-[60-390/1]-M[3,​4,​5]
BSFMS10G-[60-390/1]-M[3,​4,​5]
BSFMS10L-[60-390/1]-M[3,​4,​5]
BSFMS13-[60-390/1]-M[4,​5,​6]
BSFMS13G-[60-390/1]-M[4,​5,​6]
BSFMS13L-[60-390/1]-M[4,​5,​6]
BSFMS16-[70-390/1]-M[4,​5,​6,​8]
BSFMS16G-[70-390/1]-M[4,​5,​6,​8]
BSFMS16L-[70-390/1]-M[4,​5,​6,​8]
BSFN6-[60-400/1]-M3
BSFN6G-[60-400/1]-M3
BSFN6L-[60-400/1]-M3
BSFN8-[60-400/1]-M[3,​4]
BSFN8G-[60-400/1]-M[3,​4]
BSFN8L-[60-400/1]-M[3,​4]
BSFN10-[60-600/1]-M[3,​4,​5]
BSFN10G-[60-600/1]-M[3,​4,​5]
BSFN10L-[60-600/1]-M[3,​4,​5]
Part NumberMinimum order quantityVolume Discount
Standard
Shipping Days
?
RoHSNut type Shaft O.D. D
(φ) 		Shaft material Nut Overall Length
(mm) 		Nut O.D.
(φ) 		Shaft Overall Length L
(mm) 		Basic Load Rating Dynamic Rating
(N) 		Allowable Torque
(Nm) 		Nut Material Grease M
(mm)
1 10 Days 10[Flange Type] Round Flanged6EN 1.3505 Equiv.251460 ～ 40012003.8EN 1.7242 Equiv.Standard (S2)3
1 12 Days 10[Flange Type] Round Flanged6EN 1.3505 Equiv.251460 ～ 40012003.8EN 1.7242 Equiv.LG23
1 12 Days 10[Flange Type] Round Flanged6EN 1.3505 Equiv.251460 ～ 40012003.8EN 1.7242 Equiv.ET-100K3
1 10 Days 10[Flange Type] Round Flanged8EN 1.3505 Equiv.251660 ～ 40012004.8EN 1.7242 Equiv.Standard (S2)3 ～ 4
1 12 Days 10[Flange Type] Round Flanged8EN 1.3505 Equiv.251660 ～ 40012004.8EN 1.7242 Equiv.LG23 ～ 4
1 12 Days 10[Flange Type] Round Flanged8EN 1.3505 Equiv.251660 ～ 40012004.8EN 1.7242 Equiv.ET-100K3 ～ 4
1 10 Days 10[Flange Type] Round Flanged10.4EN 1.3505 Equiv.402160 ～ 600380019EN 1.7242 Equiv.Standard (S2)3 ～ 5
1 12 Days 10[Flange Type] Round Flanged10.4EN 1.3505 Equiv.402160 ～ 600380019EN 1.7242 Equiv.LG23 ～ 5
1 12 Days 10[Flange Type] Round Flanged10.4EN 1.3505 Equiv.402160 ～ 600380019EN 1.7242 Equiv.ET-100K3 ～ 5
1 10 Days 10[Flange Type] Round Flanged13.4EN 1.3505 Equiv.442460 ～ 600460028EN 1.7242 Equiv.Standard (S2)4 ～ 6
1 12 Days 10[Flange Type] Round Flanged13.4EN 1.3505 Equiv.442460 ～ 600460028EN 1.7242 Equiv.LG24 ～ 6
1 12 Days 10[Flange Type] Round Flanged13.4EN 1.3505 Equiv.442460 ～ 600460028EN 1.7242 Equiv.ET-100K4 ～ 6
1 10 Days 10[Flange Type] Round Flanged16.6EN 1.3505 Equiv.503170 ～ 600620051EN 1.7242 Equiv.Standard (S2)4 ～ 8
1 12 Days 10[Flange Type] Round Flanged16.6EN 1.3505 Equiv.503170 ～ 600620051EN 1.7242 Equiv.LG24 ～ 8
1 12 Days 10[Flange Type] Round Flanged16.6EN 1.3505 Equiv.503170 ～ 600620051EN 1.7242 Equiv.ET-100K4 ～ 8
1 10 Days 10[Flange Type] Round Flanged20.6EN 1.3505 Equiv.633580 ～ 700850085EN 1.7242 Equiv.Standard (S2)5 ～ 10
1 12 Days 10[Flange Type] Round Flanged20.6EN 1.3505 Equiv.633580 ～ 700850085EN 1.7242 Equiv.LG25 ～ 10
1 12 Days 10[Flange Type] Round Flanged20.6EN 1.3505 Equiv.633580 ～ 700850085EN 1.7242 Equiv.ET-100K5 ～ 10
1 10 Days 10[Flange Type] Round Flanged25.8EN 1.3505 Equiv.714290 ～ 130015400193EN 1.7242 Equiv.Standard (S2)5 ～ 12
1 12 Days 10[Flange Type] Round Flanged25.8EN 1.3505 Equiv.714290 ～ 90015400193EN 1.7242 Equiv.LG25 ～ 12
1 12 Days 10[Flange Type] Round Flanged25.8EN 1.3505 Equiv.714290 ～ 90015400193EN 1.7242 Equiv.ET-100K5 ～ 12
1 10 Days 10[Flange Type] Round Flanged30.8EN 1.3505 Equiv.8047100 ～ 115018500272EN 1.7242 Equiv.Standard (S2)6 ～ 16
1 12 Days 10[Flange Type] Round Flanged30.8EN 1.3505 Equiv.8047100 ～ 115018500272EN 1.7242 Equiv.LG26 ～ 16
1 12 Days 10[Flange Type] Round Flanged30.8EN 1.3505 Equiv.8047100 ～ 115018500272EN 1.7242 Equiv.ET-100K6 ～ 16
1 9 Days 10[Flange Type] Round Flanged6EN 1.4125 Equiv.251460 ～ 19012003.8EN 1.4125 Equiv.Standard (S2)3
1 11 Days 10[Flange Type] Round Flanged6EN 1.4125 Equiv.251460 ～ 19012003.8EN 1.4125 Equiv.LG23
1 11 Days 10[Flange Type] Round Flanged6EN 1.4125 Equiv.251460 ～ 19012003.8EN 1.4125 Equiv.ET-100K3
1 9 Days 10[Flange Type] Round Flanged8EN 1.4125 Equiv.251660 ～ 19012004.8EN 1.4125 Equiv.Standard (S2)3 ～ 4
1 11 Days 10[Flange Type] Round Flanged8EN 1.4125 Equiv.251660 ～ 19012004.8EN 1.4125 Equiv.LG23 ～ 4
1 11 Days 10[Flange Type] Round Flanged8EN 1.4125 Equiv.251660 ～ 19012004.8EN 1.4125 Equiv.ET-100K3 ～ 4
1 9 Days 10[Flange Type] Round Flanged10.4EN 1.4125 Equiv.332160 ～ 390240011EN 1.4125 Equiv.Standard (S2)3 ～ 5
1 11 Days 10[Flange Type] Round Flanged10.4EN 1.4125 Equiv.332160 ～ 390240011EN 1.4125 Equiv.LG23 ～ 5
1 11 Days 10[Flange Type] Round Flanged10.4EN 1.4125 Equiv.332160 ～ 390240011EN 1.4125 Equiv.ET-100K3 ～ 5
1 9 Days 10[Flange Type] Round Flanged13.4EN 1.4125 Equiv.362460 ～ 390330020EN 1.4125 Equiv.Standard (S2)4 ～ 6
1 11 Days 10[Flange Type] Round Flanged13.4EN 1.4125 Equiv.362460 ～ 390330020EN 1.4125 Equiv.LG24 ～ 6
1 11 Days 10[Flange Type] Round Flanged13.4EN 1.4125 Equiv.362460 ～ 390330020EN 1.4125 Equiv.ET-100K4 ～ 6
1 9 Days 10[Flange Type] Round Flanged16.6EN 1.4125 Equiv.503170 ～ 390620051EN 1.4125 Equiv.Standard (S2)4 ～ 8
1 11 Days 10[Flange Type] Round Flanged16.6EN 1.4125 Equiv.503170 ～ 390620051EN 1.4125 Equiv.LG24 ～ 8
1 11 Days 10[Flange Type] Round Flanged16.6EN 1.4125 Equiv.503170 ～ 390620051EN 1.4125 Equiv.ET-100K4 ～ 8
1 10 Days 10[Flange Type] Compact Flanged6EN 1.3505 Equiv.251460 ～ 40012003.8EN 1.7242 Equiv.Standard (S2)3
1 12 Days 10[Flange Type] Compact Flanged6EN 1.3505 Equiv.251460 ～ 40012003.8EN 1.7242 Equiv.LG23
1 12 Days 10[Flange Type] Compact Flanged6EN 1.3505 Equiv.251460 ～ 40012003.8EN 1.7242 Equiv.ET-100K3
1 10 Days 10[Flange Type] Compact Flanged8EN 1.3505 Equiv.251660 ～ 40012004.8EN 1.7242 Equiv.Standard (S2)3 ～ 4
1 12 Days 10[Flange Type] Compact Flanged8EN 1.3505 Equiv.251660 ～ 40012004.8EN 1.7242 Equiv.LG23 ～ 4
1 12 Days 10[Flange Type] Compact Flanged8EN 1.3505 Equiv.251660 ～ 40012004.8EN 1.7242 Equiv.ET-100K3 ～ 4
1 10 Days 10[Flange Type] Compact Flanged10.4EN 1.3505 Equiv.402160 ～ 600380019EN 1.7242 Equiv.Standard (S2)3 ～ 5
1 12 Days 10[Flange Type] Compact Flanged10.4EN 1.3505 Equiv.402160 ～ 600380019EN 1.7242 Equiv.LG23 ～ 5
1 12 Days 10[Flange Type] Compact Flanged10.4EN 1.3505 Equiv.402160 ～ 600380019EN 1.7242 Equiv.ET-100K3 ～ 5

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  1. 1

Specifications/Overview

 
Precautions for Ball Spline Assembly
■Check Assembly Position
  Match Mark Numbers are entered on nuts and spline shafts (see the diagram on the right).
  When re-assembling, confirm the match mark numbers, character orientations, and positional relationship of parts.
  If the alignment marks are not aligned correctly, the function will be affected.
■Tolerance for Mating Bores
  H7 tolerance is recommended for mating bores for the spline nuts when mounting them on housings.
■For Customers machining the shaft ends
  In order to facilitate nut insertions, chamfer the machined shaft ends,
and remove burrs on the edges of the spline groove with a round file.
 

Basic information

Shaft end shape (left) Tapped Shaft end shape (right) Standard Type Solid
Torque Middle Torque Number of nuts(pcs.) 1 Nut length Standard
Preload Standard Accuracy Grade Standard Grade The circulation type of balls 1-fach

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Basic Attributes

  • Shaft O.D. D(φ)

    • 6
    • 8
    • 10.4
    • 13.4
    • 16.6
    • 20.6
    • 25.8
    • 30.8

    Clear

  • Shaft material

    • EN 1.3505 Equiv.
    • EN 1.4125 Equiv.

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  • Nut Overall Length(mm)

    • 25
    • 33
    • 36
    • 40
    • 44
    • 50
    • 63
    • 71
    • 80

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  • Nut O.D.(φ)

    • 14
    • 16
    • 21
    • 24
    • 31
    • 35
    • 42
    • 47

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  • Shaft Overall Length L(mm)

     [60-1300/1mm Unit(s)]

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  • Nut Material

    • EN 1.4125 Equiv.
    • EN 1.7242 Equiv.

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  • Grease

    • ET-100K
    • LG2
    • Standard (S2)

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  • M(mm)

    • 3
    • 4
    • 5
    • 6
    • 8
    • 10
    • 12
    • 16

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  • Type

    • BSFM
    • BSFMS
    • BSFN
    • BSFS
    • BSFSS

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  • Nut type

    • Straight
    • Flange Type
      • Compact Flanged
      • Round Flanged

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  • Filter by CAD data type

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    • 9 Days or Less
    • 10 Days or Less
    • 11 Days or Less
    • 12 Days or Less

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