TBI MOTION DFI Double Ball Screw Nut

DFI is a preloaded double ball screw nut with a round flange and internal recirculation.

Key features

Two nut halves are preloaded against each other to remove backlash and raise axial stiffness
Sizes cover 16 to 32 mm screw diameter with 4 mm, 5 mm and 5.08 mm leads
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

Specifications

Circuits	1x4

DFI01604-4		Nominal screw diameter: 16 mm \| Lead: 4 mm \| Ball diameter: 2.381 mm \| Circuits: 1x4 \| Nut OD D: 30 mm \| Flange OD A: 49 mm \| Flange thickness B: 10 mm \| Nut length L: 80 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: 973 kgf \| Static load rating C0a: 2406 kgf \| Stiffness: 44 kgf/um
DFI02004-4		Nominal screw diameter: 20 mm \| Lead: 4 mm \| Ball diameter: 2.381 mm \| Circuits: 1x4 \| Nut OD D: 34 mm \| Flange OD A: 57 mm \| Flange thickness B: 11 mm \| Nut length L: 80 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: 1066 kgf \| Static load rating C0a: 2987 kgf \| Stiffness: 51 kgf/um
DFI02504-4		Nominal screw diameter: 25 mm \| Lead: 4 mm \| Ball diameter: 2.381 mm \| Circuits: 1x4 \| Nut OD D: 40 mm \| Flange OD A: 63 mm \| Flange thickness B: 11 mm \| Nut length L: 80 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: M6 \| Dynamic load rating Ca: 1180 kgf \| Static load rating C0a: 3795 kgf \| Stiffness: 60 kgf/um
DFI0255T-4		Nominal screw diameter: 25 mm \| Lead: 5.08 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: 101 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: 4903 kgf \| Stiffness: 62 kgf/um
DFI03204-4		Nominal screw diameter: 32 mm \| Lead: 4 mm \| Ball diameter: 2.381 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: 1296 kgf \| Static load rating C0a: 4838 kgf \| Stiffness: 69 kgf/um
DFI0325T-4		Nominal screw diameter: 32 mm \| Lead: 5.08 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: 102 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: 72 kgf/um

Ball ScrewsTBI MOTION

6 product codes available in this family

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TBI MOTION DFI Double Ball Screw Nut

Brand TBI MOTION·Ball Screws

Available part numbers (6)

DFI01604-4, DFI02004-4, DFI02504-4, DFI0255T-4, DFI03204-4, DFI0325T-4

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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RFQ List (0)

	Product code	Spec
	DFI01604-4	Nominal screw diameter: 16 mm \| Lead: 4 mm \| Ball diameter: 2.381 mm \| Circuits: 1x4 \| Nut OD D: 30 mm \| Flange OD A: 49 mm \| Flange thickness B: 10 mm \| Nut length L: 80 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: 973 kgf \| Static load rating C0a: 2406 kgf \| Stiffness: 44 kgf/um
	DFI02004-4	Nominal screw diameter: 20 mm \| Lead: 4 mm \| Ball diameter: 2.381 mm \| Circuits: 1x4 \| Nut OD D: 34 mm \| Flange OD A: 57 mm \| Flange thickness B: 11 mm \| Nut length L: 80 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: 1066 kgf \| Static load rating C0a: 2987 kgf \| Stiffness: 51 kgf/um
	DFI02504-4	Nominal screw diameter: 25 mm \| Lead: 4 mm \| Ball diameter: 2.381 mm \| Circuits: 1x4 \| Nut OD D: 40 mm \| Flange OD A: 63 mm \| Flange thickness B: 11 mm \| Nut length L: 80 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: M6 \| Dynamic load rating Ca: 1180 kgf \| Static load rating C0a: 3795 kgf \| Stiffness: 60 kgf/um
	DFI0255T-4	Nominal screw diameter: 25 mm \| Lead: 5.08 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: 101 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: 4903 kgf \| Stiffness: 62 kgf/um
	DFI03204-4	Nominal screw diameter: 32 mm \| Lead: 4 mm \| Ball diameter: 2.381 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: 1296 kgf \| Static load rating C0a: 4838 kgf \| Stiffness: 69 kgf/um
	DFI0325T-4	Nominal screw diameter: 32 mm \| Lead: 5.08 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: 102 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: 72 kgf/um

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TBI MOTION DFI Double Ball Screw Nut