RV 12 x 8 (5 starts)

Name: RV 12 x 8 (5 starts)
SKU: RV 12 x 8 (5 starts)

Model / article: RV 12 x 8 (5 starts)

RV 12 x 8 (5 starts) is listed by Rollvis SA in Planetary roller screws. Published model data includes Helix angle: 11,98 °; Direct efficiency: 0,86 1. See the specification table for operating conditions and source evidence.

Published size/lead/start configurations, not complete ordering codes. Nut design, preload, accuracy grade, thread direction, seals, shaft length and end machining require configuration. Load capacities are not actuator thrust ratings.

Request supplier information More from this supplier

Product overview

Manufacturer / supplier: Rollvis SA
Series: Rollvis RV planetary roller screws
Component type: Planetary roller screws
Source: Open published source

Published pricing

No verified public price indexed for this model. Contact PartMeld for a supplier inquiry.

Published specifications

Values are shown as published. Conditions, rating basis and source evidence apply to each value.

Latest source observation: 2026-09-14. Observation dates record evidence collection, not supplier re-verification.

Specifications and source evidence for RV 12 x 8 (5 starts)
Specification	Published value	Conditions and source
Helix angleModel-level statement	11,98 °	rule validated Operating conditions architecture standard planetary ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Helix angle: 11,98 ° \| {} PDF p.26 / RV 12 x 8 (5 starts) / Helix angle Source observed: 2026-09-14View source
Maximum axial backlash (source unit unspecified)Model-level statement	0,05Rating: maximum	extracted Operating conditions architecture standard planetary availability can be reduced on demand nut type single ordering scope published diameter/lead/start configuration; not a complete ordering code unit note unit not printed in the source column; confirm with manufacturer Source evidence RV 12 x 8 (5 starts) \| Max axial backlash: 0,05 (unit not printed) PDF p.26 / RV 12 x 8 (5 starts) / Max axial backlash Source observed: 2026-09-14View source
Direct efficiencyModel-level statement	0,86 1	rule validated Operating conditions architecture standard planetary direction rotary to linear ordering scope published diameter/lead/start configuration; not a complete ordering code rating note catalog estimate; preload and operating conditions affect actual efficiency Source evidence RV 12 x 8 (5 starts) \| Direct efficiency: 0,86 1 \| {'direction': 'rotary to linear', 'rating_note': 'catalog estimate; preload and operating conditions affect actual efficiency'} PDF p.26 / RV 12 x 8 (5 starts) / Direct efficiency Source observed: 2026-09-14View source
Dynamic axial load capacity CaModel-level statement	18,6 kN	rule validated Operating conditions architecture standard planetary nut type double ordering scope published diameter/lead/start configuration; not a complete ordering code rating basis rolling fatigue; use catalog load/life and preload equations, not a continuous thrust limit Source evidence RV 12 x 8 (5 starts) \| Dynamic load capacity Ca: 18,6 kN \| {'nut_type': 'double', 'rating_basis': 'rolling fatigue; use catalog load/life and preload equations, not a continuous thrust limit'} PDF p.26 / RV 12 x 8 (5 starts) / Dynamic load capacity Ca Source observed: 2026-09-14View source
Dynamic axial load capacity CaModel-level statement	18,6 kN	rule validated Operating conditions architecture standard planetary nut type single ordering scope published diameter/lead/start configuration; not a complete ordering code rating basis rolling fatigue; use catalog load/life and preload equations, not a continuous thrust limit Source evidence RV 12 x 8 (5 starts) \| Dynamic load capacity Ca: 18,6 kN \| {'nut_type': 'single', 'rating_basis': 'rolling fatigue; use catalog load/life and preload equations, not a continuous thrust limit'} PDF p.26 / RV 12 x 8 (5 starts) / Dynamic load capacity Ca Source observed: 2026-09-14View source
Dynamic axial load capacity CaModel-level statement	10,2 kN	rule validated Operating conditions architecture standard planetary nut type split ordering scope published diameter/lead/start configuration; not a complete ordering code rating basis rolling fatigue; use catalog load/life and preload equations, not a continuous thrust limit Source evidence RV 12 x 8 (5 starts) \| Dynamic load capacity Ca: 10,2 kN \| {'nut_type': 'split', 'rating_basis': 'rolling fatigue; use catalog load/life and preload equations, not a continuous thrust limit'} PDF p.26 / RV 12 x 8 (5 starts) / Dynamic load capacity Ca Source observed: 2026-09-14View source
Indirect efficiencyModel-level statement	0,83 1	rule validated Operating conditions architecture standard planetary direction linear to rotary ordering scope published diameter/lead/start configuration; not a complete ordering code rating note catalog estimate; not proof of system backdrivability Source evidence RV 12 x 8 (5 starts) \| Indirect efficiency: 0,83 1 \| {'direction': 'linear to rotary', 'rating_note': 'catalog estimate; not proof of system backdrivability'} PDF p.26 / RV 12 x 8 (5 starts) / Indirect efficiency Source observed: 2026-09-14View source
Lead (travel per revolution)Model-level statement	8 mm/rev	rule validated Operating conditions architecture standard planetary ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Lead P (travel per revolution): 8 mm/rev \| {} PDF p.26 / RV 12 x 8 (5 starts) / Lead P (travel per revolution) Source observed: 2026-09-14View source
Preloading force FvModel-level statement	146 N	rule validated Operating conditions architecture standard planetary nut type double ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Preloading force Fv: 146 N \| {'nut_type': 'double'} PDF p.26 / RV 12 x 8 (5 starts) / Preloading force Fv Source observed: 2026-09-14View source
Preloading force FvModel-level statement	146 N	rule validated Operating conditions architecture standard planetary nut type split ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Preloading force Fv: 146 N \| {'nut_type': 'split'} PDF p.26 / RV 12 x 8 (5 starts) / Preloading force Fv Source observed: 2026-09-14View source
Preload torque MvModel-level statement	0,08 N·m	rule validated Operating conditions architecture standard planetary nut type split ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Preload torque Mv: 0,08 N·m \| {'nut_type': 'split'} PDF p.26 / RV 12 x 8 (5 starts) / Preload torque Mv Source observed: 2026-09-14View source
Preload torque MvModel-level statement	0,08 N·m	rule validated Operating conditions architecture standard planetary nut type double ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Preload torque Mv: 0,08 N·m \| {'nut_type': 'double'} PDF p.26 / RV 12 x 8 (5 starts) / Preload torque Mv Source observed: 2026-09-14View source
Screw reference diameter DModel-level statement	12 mm	rule validated Operating conditions architecture standard planetary ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Reference diameter D: 12 mm \| {} PDF p.26 / RV 12 x 8 (5 starts) / Reference diameter D Source observed: 2026-09-14View source
Rigidity factor FkModel-level statement	33,1 N^(2/3)/µm	rule validated Operating conditions architecture standard planetary definition nonlinear rigidity factor, not assembled axial stiffness nut type double ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Rigidity factor Fk: 33,1 N^(2/3)/µm \| {'nut_type': 'double', 'definition': 'nonlinear rigidity factor, not assembled axial stiffness'} PDF p.26 / RV 12 x 8 (5 starts) / Rigidity factor Fk Source observed: 2026-09-14View source
Rigidity factor FkModel-level statement	13,9 N^(2/3)/µm	rule validated Operating conditions architecture standard planetary definition nonlinear rigidity factor, not assembled axial stiffness nut type split ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Rigidity factor Fk: 13,9 N^(2/3)/µm \| {'nut_type': 'split', 'definition': 'nonlinear rigidity factor, not assembled axial stiffness'} PDF p.26 / RV 12 x 8 (5 starts) / Rigidity factor Fk Source observed: 2026-09-14View source
Rigidity factor FkModel-level statement	22,0 N^(2/3)/µm	rule validated Operating conditions architecture standard planetary definition nonlinear rigidity factor, not assembled axial stiffness nut type single ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Rigidity factor Fk: 22,0 N^(2/3)/µm \| {'nut_type': 'single', 'definition': 'nonlinear rigidity factor, not assembled axial stiffness'} PDF p.26 / RV 12 x 8 (5 starts) / Rigidity factor Fk Source observed: 2026-09-14View source
Static axial load capacity C0aModel-level statement	12,5 kN	rule validated Operating conditions architecture standard planetary nut type split ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Static load capacity C0a: 12,5 kN \| {'nut_type': 'split'} PDF p.26 / RV 12 x 8 (5 starts) / Static load capacity C0a Source observed: 2026-09-14View source
Static axial load capacity C0aModel-level statement	24,9 kN	rule validated Operating conditions architecture standard planetary nut type double ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Static load capacity C0a: 24,9 kN \| {'nut_type': 'double'} PDF p.26 / RV 12 x 8 (5 starts) / Static load capacity C0a Source observed: 2026-09-14View source
Static axial load capacity C0aModel-level statement	24,9 kN	rule validated Operating conditions architecture standard planetary nut type single ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Static load capacity C0a: 24,9 kN \| {'nut_type': 'single'} PDF p.26 / RV 12 x 8 (5 starts) / Static load capacity C0a Source observed: 2026-09-14View source
Thread startsModel-level statement	5 1	rule validated Operating conditions architecture standard planetary ordering scope published diameter/lead/start configuration; not a complete ordering code Source evidence RV 12 x 8 (5 starts) \| Number of starts N: 5 1 \| {} PDF p.26 / RV 12 x 8 (5 starts) / Number of starts N Source observed: 2026-09-14View source

Technical documents and resources

Dimension drawings — catalog page 27

Confirm the exact configuration, price, availability and operating conditions with the supplier before ordering.

Report a specification error