TBI MOTION SFK Miniature Ball Screw Flange Nut

SFK is a miniature precision ball screw flange nut for compact, light-load positioning.

Key features

Sizes run from 4 mm screw diameter with 1 mm lead up to 25 mm diameter, plus XSFK versions in 10 and 14 mm
Small leads give fine resolution for optics, medical, semiconductor and small automation stages
Several sizes are also available with left-hand thread
Nuts are ordered to the TBI MOTION nut ordering format (series, thread direction, shaft diameter, lead, circuits, flange cut, surface treatment)
Preload classes and accuracy grades (C0-C10) are selected separately

SFK00401		Nominal screw diameter: 4 mm \| Lead: 1 mm \| Ball diameter: 0.8 mm \| Circuits: 1x2 \| Nut OD D: 10 mm \| Flange OD A: 20 mm \| Flange thickness B: 3 mm \| Nut length L: 12 mm \| Bolt PCD W: 15 mm \| Flange width H: 14 mm \| Mounting hole X: 2.9 mm \| Dynamic load rating Ca: 64 kgf \| Static load rating C0a: 97 kgf \| Stiffness: 5 kgf/um
SFK00601		Nominal screw diameter: 6 mm \| Lead: 1 mm \| Ball diameter: 0.8 mm \| Circuits: 1x3 \| Nut OD D: 12 mm \| Flange OD A: 24 mm \| Flange thickness B: 3.5 mm \| Nut length L: 15 mm \| Bolt PCD W: 18 mm \| Flange width H: 16 mm \| Mounting hole X: 3.4 mm \| Dynamic load rating Ca: 111 kgf \| Static load rating C0a: 224 kgf \| Stiffness: 9 kgf/um
SFK00801		Nominal screw diameter: 8 mm \| Lead: 1 mm \| Ball diameter: 0.8 mm \| Circuits: 1x4 \| Nut OD D: 14 mm \| Flange OD A: 27 mm \| Flange thickness B: 4 mm \| Nut length L: 16 mm \| Bolt PCD W: 21 mm \| Flange width H: 18 mm \| Mounting hole X: 3.4 mm \| Dynamic load rating Ca: 161 kgf \| Static load rating C0a: 403 kgf \| Stiffness: 14 kgf/um \| Left-hand thread available
SFK00802		Nominal screw diameter: 8 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x3 \| Nut OD D: 14 mm \| Flange OD A: 27 mm \| Flange thickness B: 4 mm \| Nut length L: 18 mm \| Bolt PCD W: 21 mm \| Flange width H: 18 mm \| Mounting hole X: 3.4 mm \| Dynamic load rating Ca: 222 kgf \| Static load rating C0a: 458 kgf \| Stiffness: 13 kgf/um \| Left-hand thread available
SFK0082.5		Nominal screw diameter: 8 mm \| Lead: 2.5 mm \| Ball diameter: 1.2 mm \| Circuits: 1x3 \| Nut OD D: 16 mm \| Flange OD A: 29 mm \| Flange thickness B: 4 mm \| Nut length L: 26 mm \| Bolt PCD W: 23 mm \| Flange width H: 20 mm \| Mounting hole X: 3.4 mm \| Dynamic load rating Ca: 221 kgf \| Static load rating C0a: 457 kgf \| Stiffness: 13 kgf/um
SFK01002		Nominal screw diameter: 10 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x3 \| Nut OD D: 18 mm \| Flange OD A: 35 mm \| Flange thickness B: 5 mm \| Nut length L: 28 mm \| Bolt PCD W: 27 mm \| Flange width H: 22 mm \| Mounting hole X: 4.5 mm \| Dynamic load rating Ca: 243 kgf \| Static load rating C0a: 569 kgf \| Stiffness: 15 kgf/um \| Left-hand thread available
SFK01004		Nominal screw diameter: 10 mm \| Lead: 4 mm \| Ball diameter: 2 mm \| Circuits: 1x3 \| Nut OD D: 20 mm \| Flange OD A: 37 mm \| Flange thickness B: 6 mm \| Nut length L: 34 mm \| Bolt PCD W: 29 mm \| Flange width H: 28 mm \| Mounting hole X: 4.5 mm \| Dynamic load rating Ca: 468 kgf \| Static load rating C0a: 905 kgf \| Stiffness: 17 kgf/um
SFK01202		Nominal screw diameter: 12 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x4 \| Nut OD D: 20 mm \| Flange OD A: 37 mm \| Flange thickness B: 5 mm \| Nut length L: 28 mm \| Bolt PCD W: 29 mm \| Flange width H: 24 mm \| Mounting hole X: 4.5 mm \| Dynamic load rating Ca: 334 kgf \| Static load rating C0a: 906 kgf \| Stiffness: 22 kgf/um \| Left-hand thread available
SFK01402		Nominal screw diameter: 14 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x4 \| Nut OD D: 21 mm \| Flange OD A: 40 mm \| Flange thickness B: 6 mm \| Nut length L: 23 mm \| Bolt PCD W: 31 mm \| Flange width H: 26 mm \| Mounting hole X: 5.5 mm \| Dynamic load rating Ca: 354 kgf \| Static load rating C0a: 1053 kgf \| Stiffness: 24 kgf/um \| Left-hand thread available
SFK01602		Nominal screw diameter: 16 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x4 \| Nut OD D: 25 mm \| Flange OD A: 42 mm \| Flange thickness B: 10 mm \| Nut length L: 40 mm \| Bolt PCD W: 35 mm \| Flange width H: 29 mm \| Mounting hole X: 5.5 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 373 kgf \| Static load rating C0a: 1200 kgf \| Stiffness: 26 kgf/um \| Left-hand thread available
SFK02002		Nominal screw diameter: 20 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x6 \| Nut OD D: 50 mm \| Flange OD A: 80 mm \| Flange thickness B: 15 mm \| Nut length L: 55 mm \| Bolt PCD W: 65 mm \| Flange width H: 68 mm \| Mounting hole X: 6.5 mm \| Counterbore Y x Z: 10.5 x 6 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 581 kgf \| Static load rating C0a: 2284 kgf \| Stiffness: 48 kgf/um
SFK02502		Nominal screw diameter: 25 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x5 \| Nut OD D: 50 mm \| Flange OD A: 80 mm \| Flange thickness B: 13 mm \| Nut length L: 43 mm \| Bolt PCD W: 65 mm \| Flange width H: 68 mm \| Mounting hole X: 6.5 mm \| Counterbore Y x Z: 10.5 x 6 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 540 kgf \| Static load rating C0a: 2381 kgf \| Stiffness: 46 kgf/um
XSFK01004		Nominal screw diameter: 10 mm \| Lead: 4 mm \| Ball diameter: 2 mm \| Circuits: 1x3 \| Nut OD D: 26 mm \| Flange OD A: 46 mm \| Flange thickness B: 10 mm \| Nut length L: 34 mm \| Bolt PCD W: 36 mm \| Flange width H: 28 mm \| Mounting hole X: 4.5 mm \| Counterbore Y x Z: 8 x 4.5 mm \| Oil hole Q: M6x1 \| Dynamic load rating Ca: 468 kgf \| Static load rating C0a: 905 kgf \| Stiffness: 17 kgf/um
XSFK01404		Nominal screw diameter: 14 mm \| Lead: 4 mm \| Ball diameter: 2.5 mm \| Circuits: 1x4 \| Nut OD D: 26 mm \| Flange OD A: 46 mm \| Flange thickness B: 10 mm \| Nut length L: 45 mm \| Bolt PCD W: 36 mm \| Flange width H: 28 mm \| Mounting hole X: 4.5 mm \| Counterbore Y x Z: 8 x 4.5 mm \| Oil hole Q: M6x1 \| Dynamic load rating Ca: 957 kgf \| Static load rating C0a: 2145 kgf \| Stiffness: 16 kgf/um
SFK01205		Nominal screw diameter: 12 mm \| Lead: 5 mm \| Nut weight: 0.08 kg \| Screw shaft weight: 0.87 kg/m \| Nut type: K miniature flange nut (dimensions not tabulated in this catalog)
SFK01404		Nominal screw diameter: 14 mm \| Lead: 4 mm \| Nut weight: 0.116 kg \| Screw shaft weight: 1.2 kg/m \| Nut type: K miniature flange nut (dimensions not tabulated in this catalog)

Ball ScrewsTBI MOTION

16 product codes available in this family

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TBI MOTION SFK Miniature Ball Screw Flange Nut

Brand TBI MOTION·Ball Screws

Available part numbers (16)

SFK00401, SFK00601, SFK00801, SFK00802, SFK0082.5, SFK01002, SFK01004, SFK01202, SFK01402, SFK01602 + 6 more — see full table ↓

How to order

Send the TBI MOTION part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

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Product codes & specifications

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	Product code	Spec
	SFK00401	Nominal screw diameter: 4 mm \| Lead: 1 mm \| Ball diameter: 0.8 mm \| Circuits: 1x2 \| Nut OD D: 10 mm \| Flange OD A: 20 mm \| Flange thickness B: 3 mm \| Nut length L: 12 mm \| Bolt PCD W: 15 mm \| Flange width H: 14 mm \| Mounting hole X: 2.9 mm \| Dynamic load rating Ca: 64 kgf \| Static load rating C0a: 97 kgf \| Stiffness: 5 kgf/um
	SFK00601	Nominal screw diameter: 6 mm \| Lead: 1 mm \| Ball diameter: 0.8 mm \| Circuits: 1x3 \| Nut OD D: 12 mm \| Flange OD A: 24 mm \| Flange thickness B: 3.5 mm \| Nut length L: 15 mm \| Bolt PCD W: 18 mm \| Flange width H: 16 mm \| Mounting hole X: 3.4 mm \| Dynamic load rating Ca: 111 kgf \| Static load rating C0a: 224 kgf \| Stiffness: 9 kgf/um
	SFK00801	Nominal screw diameter: 8 mm \| Lead: 1 mm \| Ball diameter: 0.8 mm \| Circuits: 1x4 \| Nut OD D: 14 mm \| Flange OD A: 27 mm \| Flange thickness B: 4 mm \| Nut length L: 16 mm \| Bolt PCD W: 21 mm \| Flange width H: 18 mm \| Mounting hole X: 3.4 mm \| Dynamic load rating Ca: 161 kgf \| Static load rating C0a: 403 kgf \| Stiffness: 14 kgf/um \| Left-hand thread available
	SFK00802	Nominal screw diameter: 8 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x3 \| Nut OD D: 14 mm \| Flange OD A: 27 mm \| Flange thickness B: 4 mm \| Nut length L: 18 mm \| Bolt PCD W: 21 mm \| Flange width H: 18 mm \| Mounting hole X: 3.4 mm \| Dynamic load rating Ca: 222 kgf \| Static load rating C0a: 458 kgf \| Stiffness: 13 kgf/um \| Left-hand thread available
	SFK0082.5	Nominal screw diameter: 8 mm \| Lead: 2.5 mm \| Ball diameter: 1.2 mm \| Circuits: 1x3 \| Nut OD D: 16 mm \| Flange OD A: 29 mm \| Flange thickness B: 4 mm \| Nut length L: 26 mm \| Bolt PCD W: 23 mm \| Flange width H: 20 mm \| Mounting hole X: 3.4 mm \| Dynamic load rating Ca: 221 kgf \| Static load rating C0a: 457 kgf \| Stiffness: 13 kgf/um
	SFK01002	Nominal screw diameter: 10 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x3 \| Nut OD D: 18 mm \| Flange OD A: 35 mm \| Flange thickness B: 5 mm \| Nut length L: 28 mm \| Bolt PCD W: 27 mm \| Flange width H: 22 mm \| Mounting hole X: 4.5 mm \| Dynamic load rating Ca: 243 kgf \| Static load rating C0a: 569 kgf \| Stiffness: 15 kgf/um \| Left-hand thread available
	SFK01004	Nominal screw diameter: 10 mm \| Lead: 4 mm \| Ball diameter: 2 mm \| Circuits: 1x3 \| Nut OD D: 20 mm \| Flange OD A: 37 mm \| Flange thickness B: 6 mm \| Nut length L: 34 mm \| Bolt PCD W: 29 mm \| Flange width H: 28 mm \| Mounting hole X: 4.5 mm \| Dynamic load rating Ca: 468 kgf \| Static load rating C0a: 905 kgf \| Stiffness: 17 kgf/um
	SFK01202	Nominal screw diameter: 12 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x4 \| Nut OD D: 20 mm \| Flange OD A: 37 mm \| Flange thickness B: 5 mm \| Nut length L: 28 mm \| Bolt PCD W: 29 mm \| Flange width H: 24 mm \| Mounting hole X: 4.5 mm \| Dynamic load rating Ca: 334 kgf \| Static load rating C0a: 906 kgf \| Stiffness: 22 kgf/um \| Left-hand thread available
	SFK01402	Nominal screw diameter: 14 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x4 \| Nut OD D: 21 mm \| Flange OD A: 40 mm \| Flange thickness B: 6 mm \| Nut length L: 23 mm \| Bolt PCD W: 31 mm \| Flange width H: 26 mm \| Mounting hole X: 5.5 mm \| Dynamic load rating Ca: 354 kgf \| Static load rating C0a: 1053 kgf \| Stiffness: 24 kgf/um \| Left-hand thread available
	SFK01602	Nominal screw diameter: 16 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x4 \| Nut OD D: 25 mm \| Flange OD A: 42 mm \| Flange thickness B: 10 mm \| Nut length L: 40 mm \| Bolt PCD W: 35 mm \| Flange width H: 29 mm \| Mounting hole X: 5.5 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 373 kgf \| Static load rating C0a: 1200 kgf \| Stiffness: 26 kgf/um \| Left-hand thread available
	SFK02002	Nominal screw diameter: 20 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x6 \| Nut OD D: 50 mm \| Flange OD A: 80 mm \| Flange thickness B: 15 mm \| Nut length L: 55 mm \| Bolt PCD W: 65 mm \| Flange width H: 68 mm \| Mounting hole X: 6.5 mm \| Counterbore Y x Z: 10.5 x 6 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 581 kgf \| Static load rating C0a: 2284 kgf \| Stiffness: 48 kgf/um
	SFK02502	Nominal screw diameter: 25 mm \| Lead: 2 mm \| Ball diameter: 1.2 mm \| Circuits: 1x5 \| Nut OD D: 50 mm \| Flange OD A: 80 mm \| Flange thickness B: 13 mm \| Nut length L: 43 mm \| Bolt PCD W: 65 mm \| Flange width H: 68 mm \| Mounting hole X: 6.5 mm \| Counterbore Y x Z: 10.5 x 6 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 540 kgf \| Static load rating C0a: 2381 kgf \| Stiffness: 46 kgf/um
	XSFK01004	Nominal screw diameter: 10 mm \| Lead: 4 mm \| Ball diameter: 2 mm \| Circuits: 1x3 \| Nut OD D: 26 mm \| Flange OD A: 46 mm \| Flange thickness B: 10 mm \| Nut length L: 34 mm \| Bolt PCD W: 36 mm \| Flange width H: 28 mm \| Mounting hole X: 4.5 mm \| Counterbore Y x Z: 8 x 4.5 mm \| Oil hole Q: M6x1 \| Dynamic load rating Ca: 468 kgf \| Static load rating C0a: 905 kgf \| Stiffness: 17 kgf/um
	XSFK01404	Nominal screw diameter: 14 mm \| Lead: 4 mm \| Ball diameter: 2.5 mm \| Circuits: 1x4 \| Nut OD D: 26 mm \| Flange OD A: 46 mm \| Flange thickness B: 10 mm \| Nut length L: 45 mm \| Bolt PCD W: 36 mm \| Flange width H: 28 mm \| Mounting hole X: 4.5 mm \| Counterbore Y x Z: 8 x 4.5 mm \| Oil hole Q: M6x1 \| Dynamic load rating Ca: 957 kgf \| Static load rating C0a: 2145 kgf \| Stiffness: 16 kgf/um
	SFK01205	Nominal screw diameter: 12 mm \| Lead: 5 mm \| Nut weight: 0.08 kg \| Screw shaft weight: 0.87 kg/m \| Nut type: K miniature flange nut (dimensions not tabulated in this catalog)
	SFK01404	Nominal screw diameter: 14 mm \| Lead: 4 mm \| Nut weight: 0.116 kg \| Screw shaft weight: 1.2 kg/m \| Nut type: K miniature flange nut (dimensions not tabulated in this catalog)

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TBI MOTION SFK Miniature Ball Screw Flange Nut