TBI MOTION SFNI Ball Screw Flange Nut (Internal Recirculation)

SFNI is a single ball screw flange nut with strong dust-proof sealing and a compact round flange with two flats.

Key features

It uses internal recirculation, giving a short, precise nut that suits small leads and space-limited designs
Sizes cover 16 to 80 mm screw diameter with 5 or 10 mm lead and four load circuits
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

SFNI01605-4		Nominal screw diameter: 16 mm \| Lead: 5 mm \| Ball diameter: 3.175 mm \| Circuits: 1x4 \| Nut OD D: 30 mm \| Flange OD A: 49 mm \| Flange thickness B: 10 mm \| Nut length L: 45 mm \| Bolt PCD W: 39 mm \| Flange width H: 34 mm \| Mounting hole X x Y x Z: 4.5 x 8 x 4.5 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 1380 kgf \| Static load rating C0a: 3052 kgf \| Stiffness: 33 kgf/um
XSIR01610		Nominal screw diameter: 16 mm \| Lead: 10 mm \| Ball diameter: 3.175 mm \| Circuits: 1x3 \| Nut OD D: 30 mm \| Flange OD A: 49 mm \| Flange thickness B: 10 mm \| Nut length L: 55 mm \| Bolt PCD W: 39 mm \| Flange width H: 34 mm \| Mounting hole X x Y x Z: 4.5 x 8 x 4.5 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 1103 kgf \| Static load rating C0a: 2401 kgf \| Stiffness: 27 kgf/um
SFNI02005-4		Nominal screw diameter: 20 mm \| Lead: 5 mm \| Ball diameter: 3.175 mm \| Circuits: 1x4 \| Nut OD D: 34 mm \| Flange OD A: 57 mm \| Flange thickness B: 11 mm \| Nut length L: 51 mm \| Bolt PCD W: 45 mm \| Flange width H: 40 mm \| Mounting hole X x Y x Z: 5.5 x 9.5 x 5.5 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 1551 kgf \| Static load rating C0a: 3875 kgf \| Stiffness: 39 kgf/um
SFNI02505-4		Nominal screw diameter: 25 mm \| Lead: 5 mm \| Ball diameter: 3.175 mm \| Circuits: 1x4 \| Nut OD D: 40 mm \| Flange OD A: 63 mm \| Flange thickness B: 11 mm \| Nut length L: 51 mm \| Bolt PCD W: 51 mm \| Flange width H: 46 mm \| Mounting hole X x Y x Z: 5.5 x 9.5 x 5.5 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 1724 kgf \| Static load rating C0a: 4904 kgf \| Stiffness: 45 kgf/um
SFNI02510-4		Nominal screw diameter: 25 mm \| Lead: 10 mm \| Ball diameter: 4.762 mm \| Circuits: 1x4 \| Nut OD D: 46 mm \| Flange OD A: 72 mm \| Flange thickness B: 12 mm \| Nut length L: 80 mm \| Bolt PCD W: 58 mm \| Flange width H: 52 mm \| Mounting hole X x Y x Z: 6.5 x 11 x 6.5 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 2954 kgf \| Static load rating C0a: 7295 kgf \| Stiffness: 51 kgf/um
SFNI03205-4		Nominal screw diameter: 32 mm \| Lead: 5 mm \| Ball diameter: 3.175 mm \| Circuits: 1x4 \| Nut OD D: 46 mm \| Flange OD A: 72 mm \| Flange thickness B: 12 mm \| Nut length L: 52 mm \| Bolt PCD W: 58 mm \| Flange width H: 52 mm \| Mounting hole X x Y x Z: 6.5 x 11 x 6.5 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 1922 kgf \| Static load rating C0a: 6343 kgf \| Stiffness: 52 kgf/um
SFNI03210-4		Nominal screw diameter: 32 mm \| Lead: 10 mm \| Ball diameter: 6.35 mm \| Circuits: 1x4 \| Nut OD D: 54 mm \| Flange OD A: 88 mm \| Flange thickness B: 15 mm \| Nut length L: 85 mm \| Bolt PCD W: 70 mm \| Flange width H: 62 mm \| Mounting hole X x Y x Z: 9 x 14 x 8.5 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 4805 kgf \| Static load rating C0a: 12208 kgf \| Stiffness: 62 kgf/um
SFNI04005-4		Nominal screw diameter: 40 mm \| Lead: 5 mm \| Ball diameter: 3.175 mm \| Circuits: 1x4 \| Nut OD D: 56 mm \| Flange OD A: 90 mm \| Flange thickness B: 15 mm \| Nut length L: 55 mm \| Bolt PCD W: 72 mm \| Flange width H: 64 mm \| Mounting hole X x Y x Z: 9 x 14 x 9 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 2110 kgf \| Static load rating C0a: 7988 kgf \| Stiffness: 59 kgf/um
SFNI04010-4		Nominal screw diameter: 40 mm \| Lead: 10 mm \| Ball diameter: 6.35 mm \| Circuits: 1x4 \| Nut OD D: 62 mm \| Flange OD A: 104 mm \| Flange thickness B: 18 mm \| Nut length L: 88 mm \| Bolt PCD W: 82 mm \| Flange width H: 70 mm \| Mounting hole X x Y x Z: 11 x 17.5 x 11 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 5399 kgf \| Static load rating C0a: 15500 kgf \| Stiffness: 72 kgf/um
SFNI05010-4		Nominal screw diameter: 50 mm \| Lead: 10 mm \| Ball diameter: 6.35 mm \| Circuits: 1x4 \| Nut OD D: 72 mm \| Flange OD A: 114 mm \| Flange thickness B: 18 mm \| Nut length L: 88 mm \| Bolt PCD W: 92 mm \| Flange width H: 82 mm \| Mounting hole X x Y x Z: 11 x 17.5 x 11 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 6004 kgf \| Static load rating C0a: 19614 kgf \| Stiffness: 83 kgf/um
SFNI06310-4		Nominal screw diameter: 63 mm \| Lead: 10 mm \| Ball diameter: 6.35 mm \| Circuits: 1x4 \| Nut OD D: 85 mm \| Flange OD A: 131 mm \| Flange thickness B: 22 mm \| Nut length L: 93 mm \| Bolt PCD W: 107 mm \| Flange width H: 95 mm \| Mounting hole X x Y x Z: 14 x 20 x 13 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 6719 kgf \| Static load rating C0a: 25358 kgf \| Stiffness: 95 kgf/um
SFNI08010-4		Nominal screw diameter: 80 mm \| Lead: 10 mm \| Ball diameter: 6.35 mm \| Circuits: 1x4 \| Nut OD D: 105 mm \| Flange OD A: 150 mm \| Flange thickness B: 22 mm \| Nut length L: 93 mm \| Bolt PCD W: 127 mm \| Flange width H: 115 mm \| Mounting hole X x Y x Z: 14 x 20 x 13 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 7346 kgf \| Static load rating C0a: 31953 kgf \| Stiffness: 109 kgf/um

Ball ScrewsTBI MOTION

12 product codes available in this family

Sourced direct from KoreaExport-ready supplyCompetitive pricing

RFQ List 0 Email about this

Need a different model, or a part not listed here? Send us your parts list →

TBI MOTION SFNI Ball Screw Flange Nut (Internal Recirculation)

Brand TBI MOTION·Ball Screws

Available part numbers (12)

SFNI01605-4, XSIR01610, SFNI02005-4, SFNI02505-4, SFNI02510-4, SFNI03205-4, SFNI03210-4, SFNI04005-4, SFNI04010-4, SFNI05010-4 + 2 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.

RFQ List 0 →

View full details

Product codes & specifications

0 selected

RFQ List (0)

	Product code	Spec
	SFNI01605-4	Nominal screw diameter: 16 mm \| Lead: 5 mm \| Ball diameter: 3.175 mm \| Circuits: 1x4 \| Nut OD D: 30 mm \| Flange OD A: 49 mm \| Flange thickness B: 10 mm \| Nut length L: 45 mm \| Bolt PCD W: 39 mm \| Flange width H: 34 mm \| Mounting hole X x Y x Z: 4.5 x 8 x 4.5 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 1380 kgf \| Static load rating C0a: 3052 kgf \| Stiffness: 33 kgf/um
	XSIR01610	Nominal screw diameter: 16 mm \| Lead: 10 mm \| Ball diameter: 3.175 mm \| Circuits: 1x3 \| Nut OD D: 30 mm \| Flange OD A: 49 mm \| Flange thickness B: 10 mm \| Nut length L: 55 mm \| Bolt PCD W: 39 mm \| Flange width H: 34 mm \| Mounting hole X x Y x Z: 4.5 x 8 x 4.5 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 1103 kgf \| Static load rating C0a: 2401 kgf \| Stiffness: 27 kgf/um
	SFNI02005-4	Nominal screw diameter: 20 mm \| Lead: 5 mm \| Ball diameter: 3.175 mm \| Circuits: 1x4 \| Nut OD D: 34 mm \| Flange OD A: 57 mm \| Flange thickness B: 11 mm \| Nut length L: 51 mm \| Bolt PCD W: 45 mm \| Flange width H: 40 mm \| Mounting hole X x Y x Z: 5.5 x 9.5 x 5.5 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 1551 kgf \| Static load rating C0a: 3875 kgf \| Stiffness: 39 kgf/um
	SFNI02505-4	Nominal screw diameter: 25 mm \| Lead: 5 mm \| Ball diameter: 3.175 mm \| Circuits: 1x4 \| Nut OD D: 40 mm \| Flange OD A: 63 mm \| Flange thickness B: 11 mm \| Nut length L: 51 mm \| Bolt PCD W: 51 mm \| Flange width H: 46 mm \| Mounting hole X x Y x Z: 5.5 x 9.5 x 5.5 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 1724 kgf \| Static load rating C0a: 4904 kgf \| Stiffness: 45 kgf/um
	SFNI02510-4	Nominal screw diameter: 25 mm \| Lead: 10 mm \| Ball diameter: 4.762 mm \| Circuits: 1x4 \| Nut OD D: 46 mm \| Flange OD A: 72 mm \| Flange thickness B: 12 mm \| Nut length L: 80 mm \| Bolt PCD W: 58 mm \| Flange width H: 52 mm \| Mounting hole X x Y x Z: 6.5 x 11 x 6.5 mm \| Oil hole Q: M6 \| Dynamic load rating Ca: 2954 kgf \| Static load rating C0a: 7295 kgf \| Stiffness: 51 kgf/um
	SFNI03205-4	Nominal screw diameter: 32 mm \| Lead: 5 mm \| Ball diameter: 3.175 mm \| Circuits: 1x4 \| Nut OD D: 46 mm \| Flange OD A: 72 mm \| Flange thickness B: 12 mm \| Nut length L: 52 mm \| Bolt PCD W: 58 mm \| Flange width H: 52 mm \| Mounting hole X x Y x Z: 6.5 x 11 x 6.5 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 1922 kgf \| Static load rating C0a: 6343 kgf \| Stiffness: 52 kgf/um
	SFNI03210-4	Nominal screw diameter: 32 mm \| Lead: 10 mm \| Ball diameter: 6.35 mm \| Circuits: 1x4 \| Nut OD D: 54 mm \| Flange OD A: 88 mm \| Flange thickness B: 15 mm \| Nut length L: 85 mm \| Bolt PCD W: 70 mm \| Flange width H: 62 mm \| Mounting hole X x Y x Z: 9 x 14 x 8.5 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 4805 kgf \| Static load rating C0a: 12208 kgf \| Stiffness: 62 kgf/um
	SFNI04005-4	Nominal screw diameter: 40 mm \| Lead: 5 mm \| Ball diameter: 3.175 mm \| Circuits: 1x4 \| Nut OD D: 56 mm \| Flange OD A: 90 mm \| Flange thickness B: 15 mm \| Nut length L: 55 mm \| Bolt PCD W: 72 mm \| Flange width H: 64 mm \| Mounting hole X x Y x Z: 9 x 14 x 9 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 2110 kgf \| Static load rating C0a: 7988 kgf \| Stiffness: 59 kgf/um
	SFNI04010-4	Nominal screw diameter: 40 mm \| Lead: 10 mm \| Ball diameter: 6.35 mm \| Circuits: 1x4 \| Nut OD D: 62 mm \| Flange OD A: 104 mm \| Flange thickness B: 18 mm \| Nut length L: 88 mm \| Bolt PCD W: 82 mm \| Flange width H: 70 mm \| Mounting hole X x Y x Z: 11 x 17.5 x 11 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 5399 kgf \| Static load rating C0a: 15500 kgf \| Stiffness: 72 kgf/um
	SFNI05010-4	Nominal screw diameter: 50 mm \| Lead: 10 mm \| Ball diameter: 6.35 mm \| Circuits: 1x4 \| Nut OD D: 72 mm \| Flange OD A: 114 mm \| Flange thickness B: 18 mm \| Nut length L: 88 mm \| Bolt PCD W: 92 mm \| Flange width H: 82 mm \| Mounting hole X x Y x Z: 11 x 17.5 x 11 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 6004 kgf \| Static load rating C0a: 19614 kgf \| Stiffness: 83 kgf/um
	SFNI06310-4	Nominal screw diameter: 63 mm \| Lead: 10 mm \| Ball diameter: 6.35 mm \| Circuits: 1x4 \| Nut OD D: 85 mm \| Flange OD A: 131 mm \| Flange thickness B: 22 mm \| Nut length L: 93 mm \| Bolt PCD W: 107 mm \| Flange width H: 95 mm \| Mounting hole X x Y x Z: 14 x 20 x 13 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 6719 kgf \| Static load rating C0a: 25358 kgf \| Stiffness: 95 kgf/um
	SFNI08010-4	Nominal screw diameter: 80 mm \| Lead: 10 mm \| Ball diameter: 6.35 mm \| Circuits: 1x4 \| Nut OD D: 105 mm \| Flange OD A: 150 mm \| Flange thickness B: 22 mm \| Nut length L: 93 mm \| Bolt PCD W: 127 mm \| Flange width H: 115 mm \| Mounting hole X x Y x Z: 14 x 20 x 13 mm \| Oil hole Q: M8 \| Dynamic load rating Ca: 7346 kgf \| Static load rating C0a: 31953 kgf \| Stiffness: 109 kgf/um

Need a different model, or a part not listed here? Send us your parts list →

Related products

All Linear Motion & Bearings →

Item added to your cart

TBI MOTION SFNI Ball Screw Flange Nut (Internal Recirculation)