TPC Mechatronics ROFNI Series Offset Preload Ball Screw Nut (NI-Type, Flanged)

The ROFNI Series is a precision ball screw nut line from TPC Mechatronics: NI-type flanged nut with offset (lead-shift) preload in a single nut body, shaft diameters 16-80 mm.

Key features

Ball screws convert rotary motion into linear motion with high efficiency, reversibility and high positioning precision
Internal ball circulation keeps the nut outer diameter small
Shafts are available ground or rolled in accuracy grades C0 to C10 with selectable axial clearance/preload (P0-P4) and surface treatments
The table lists ball diameter, root diameter, basic dynamic and static load ratings, rigidity and main nut dimensions for each model

Specifications

Circuits	8×1
Thread direction	Right

ROFNIR1605-4		Shaft dia. d: 16 mm \| Lead: 5 mm \| Ball dia.: 3.175 mm \| Dynamic load Ca: 1381 kgf \| Static load Coa: 3055 kgf \| Rigidity K: 45 kgf/μm \| Nut dia. D: 30 mm \| Flange dia. A: 49 mm \| Nut length L: 75 mm \| Circuits: 8×1 \| Thread direction: Right
ROFNIR2005-4		Shaft dia. d: 20 mm \| Lead: 5 mm \| Ball dia.: 3.175 mm \| Dynamic load Ca: 1552 kgf \| Static load Coa: 3879 kgf \| Rigidity K: 52 kgf/μm \| Nut dia. D: 34 mm \| Flange dia. A: 57 mm \| Nut length L: 85 mm \| Circuits: 8×1 \| Thread direction: Right
ROFNIR2505-4		Shaft dia. d: 25 mm \| Lead: 5 mm \| Ball dia.: 3.175 mm \| Dynamic load Ca: 1726 kgf \| Static load Coa: 4909 kgf \| Rigidity K: 61 kgf/μm \| Nut dia. D: 40 mm \| Flange dia. A: 63 mm \| Nut length L: 86 mm \| Circuits: 8×1 \| Thread direction: Right
ROFNIR2510-4		Shaft dia. d: 25 mm \| Lead: 10 mm \| Ball dia.: 4.762 mm \| Dynamic load Ca: 2957 kgf \| Static load Coa: 7302 kgf \| Rigidity K: 69 kgf/μm \| Nut dia. D: 46 mm \| Flange dia. A: 72 mm \| Nut length L: 30 mm \| Circuits: 8×1 \| Thread direction: Right
ROFNIR3205-4		Shaft dia. d: 32 mm \| Lead: 5 mm \| Ball dia.: 3.175 mm \| Dynamic load Ca: 1924 kgf \| Static load Coa: 6350 kgf \| Rigidity K: 71 kgf/μm \| Nut dia. D: 46 mm \| Flange dia. A: 72 mm \| Nut length L: 87 mm \| Circuits: 8×1 \| Thread direction: Right
ROFNIR3210-4		Shaft dia. d: 32 mm \| Lead: 10 mm \| Ball dia.: 6.35 mm \| Dynamic load Ca: 4810 kgf \| Static load Coa: 12220 kgf \| Rigidity K: 85 kgf/μm \| Nut dia. D: 54 mm \| Flange dia. A: 88 mm \| Nut length L: 45 mm \| Circuits: 8×1 \| Thread direction: Right
ROFNIR4005-4		Shaft dia. d: 40 mm \| Lead: 5 mm \| Ball dia.: 3.175 mm \| Dynamic load Ca: 2112 kgf \| Static load Coa: 7996 kgf \| Rigidity K: 82 kgf/μm \| Nut dia. D: 56 mm \| Flange dia. A: 90 mm \| Nut length L: 90 mm \| Circuits: 8×1 \| Thread direction: Right
ROFNIR4010-4		Shaft dia. d: 40 mm \| Lead: 10 mm \| Ball dia.: 6.35 mm \| Dynamic load Ca: 5405 kgf \| Static load Coa: 15516 kgf \| Rigidity K: 98 kgf/μm \| Nut dia. D: 62 mm \| Flange dia. A: 104 mm \| Nut length L: 48 mm \| Circuits: 8×1 \| Thread direction: Right
ROFNIR5010-4		Shaft dia. d: 50 mm \| Lead: 10 mm \| Ball dia.: 6.35 mm \| Dynamic load Ca: 6010 kgf \| Static load Coa: 19634 kgf \| Rigidity K: 113 kgf/μm \| Nut dia. D: 72 mm \| Flange dia. A: 114 mm \| Nut length L: 48 mm \| Circuits: 8×1 \| Thread direction: Right
ROFNIR6310-4		Shaft dia. d: 63 mm \| Lead: 10 mm \| Ball dia.: 6.35 mm \| Dynamic load Ca: 6726 kgf \| Static load Coa: 12384 kgf \| Rigidity K: 132 kgf/μm \| Nut dia. D: 85 mm \| Flange dia. A: 131 mm \| Nut length L: 53 mm \| Circuits: 8×1 \| Thread direction: Right
ROFNIR8010-4		Shaft dia. d: 80 mm \| Lead: 10 mm \| Ball dia.: 6.35 mm \| Dynamic load Ca: 7353 kgf \| Static load Coa: 31986 kgf \| Rigidity K: 153 kgf/μm \| Nut dia. D: 105 mm \| Flange dia. A: 150 mm \| Nut length L: 53 mm \| Circuits: 8×1 \| Thread direction: Right

Ball ScrewsTPC Mechatronics

11 product codes available in this family

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TPC Mechatronics ROFNI Series Offset Preload Ball Screw Nut (NI-Type, Flanged)

Brand TPC Mechatronics·Ball Screws

Available part numbers (11)

ROFNIR1605-4, ROFNIR2005-4, ROFNIR2505-4, ROFNIR2510-4, ROFNIR3205-4, ROFNIR3210-4, ROFNIR4005-4, ROFNIR4010-4, ROFNIR5010-4, ROFNIR6310-4 + 1 more — see full table ↓

How to order

Send the TPC Mechatronics 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
	ROFNIR1605-4	Shaft dia. d: 16 mm \| Lead: 5 mm \| Ball dia.: 3.175 mm \| Dynamic load Ca: 1381 kgf \| Static load Coa: 3055 kgf \| Rigidity K: 45 kgf/μm \| Nut dia. D: 30 mm \| Flange dia. A: 49 mm \| Nut length L: 75 mm \| Circuits: 8×1 \| Thread direction: Right
	ROFNIR2005-4	Shaft dia. d: 20 mm \| Lead: 5 mm \| Ball dia.: 3.175 mm \| Dynamic load Ca: 1552 kgf \| Static load Coa: 3879 kgf \| Rigidity K: 52 kgf/μm \| Nut dia. D: 34 mm \| Flange dia. A: 57 mm \| Nut length L: 85 mm \| Circuits: 8×1 \| Thread direction: Right
	ROFNIR2505-4	Shaft dia. d: 25 mm \| Lead: 5 mm \| Ball dia.: 3.175 mm \| Dynamic load Ca: 1726 kgf \| Static load Coa: 4909 kgf \| Rigidity K: 61 kgf/μm \| Nut dia. D: 40 mm \| Flange dia. A: 63 mm \| Nut length L: 86 mm \| Circuits: 8×1 \| Thread direction: Right
	ROFNIR2510-4	Shaft dia. d: 25 mm \| Lead: 10 mm \| Ball dia.: 4.762 mm \| Dynamic load Ca: 2957 kgf \| Static load Coa: 7302 kgf \| Rigidity K: 69 kgf/μm \| Nut dia. D: 46 mm \| Flange dia. A: 72 mm \| Nut length L: 30 mm \| Circuits: 8×1 \| Thread direction: Right
	ROFNIR3205-4	Shaft dia. d: 32 mm \| Lead: 5 mm \| Ball dia.: 3.175 mm \| Dynamic load Ca: 1924 kgf \| Static load Coa: 6350 kgf \| Rigidity K: 71 kgf/μm \| Nut dia. D: 46 mm \| Flange dia. A: 72 mm \| Nut length L: 87 mm \| Circuits: 8×1 \| Thread direction: Right
	ROFNIR3210-4	Shaft dia. d: 32 mm \| Lead: 10 mm \| Ball dia.: 6.35 mm \| Dynamic load Ca: 4810 kgf \| Static load Coa: 12220 kgf \| Rigidity K: 85 kgf/μm \| Nut dia. D: 54 mm \| Flange dia. A: 88 mm \| Nut length L: 45 mm \| Circuits: 8×1 \| Thread direction: Right
	ROFNIR4005-4	Shaft dia. d: 40 mm \| Lead: 5 mm \| Ball dia.: 3.175 mm \| Dynamic load Ca: 2112 kgf \| Static load Coa: 7996 kgf \| Rigidity K: 82 kgf/μm \| Nut dia. D: 56 mm \| Flange dia. A: 90 mm \| Nut length L: 90 mm \| Circuits: 8×1 \| Thread direction: Right
	ROFNIR4010-4	Shaft dia. d: 40 mm \| Lead: 10 mm \| Ball dia.: 6.35 mm \| Dynamic load Ca: 5405 kgf \| Static load Coa: 15516 kgf \| Rigidity K: 98 kgf/μm \| Nut dia. D: 62 mm \| Flange dia. A: 104 mm \| Nut length L: 48 mm \| Circuits: 8×1 \| Thread direction: Right
	ROFNIR5010-4	Shaft dia. d: 50 mm \| Lead: 10 mm \| Ball dia.: 6.35 mm \| Dynamic load Ca: 6010 kgf \| Static load Coa: 19634 kgf \| Rigidity K: 113 kgf/μm \| Nut dia. D: 72 mm \| Flange dia. A: 114 mm \| Nut length L: 48 mm \| Circuits: 8×1 \| Thread direction: Right
	ROFNIR6310-4	Shaft dia. d: 63 mm \| Lead: 10 mm \| Ball dia.: 6.35 mm \| Dynamic load Ca: 6726 kgf \| Static load Coa: 12384 kgf \| Rigidity K: 132 kgf/μm \| Nut dia. D: 85 mm \| Flange dia. A: 131 mm \| Nut length L: 53 mm \| Circuits: 8×1 \| Thread direction: Right
	ROFNIR8010-4	Shaft dia. d: 80 mm \| Lead: 10 mm \| Ball dia.: 6.35 mm \| Dynamic load Ca: 7353 kgf \| Static load Coa: 31986 kgf \| Rigidity K: 153 kgf/μm \| Nut dia. D: 105 mm \| Flange dia. A: 150 mm \| Nut length L: 53 mm \| Circuits: 8×1 \| Thread direction: Right

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TPC Mechatronics ROFNI Series Offset Preload Ball Screw Nut (NI-Type, Flanged)