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Elastic Coupling SKS — Flector Expansion Hub

Series SKS · Flector Expansion Hub

Expanding-Hub Elastic Coupling SKS

Jaw coupling with conical expansion ring hub. Keyless friction clamping, high torque transmission, press-free disassembly.

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Frette conique
Expansion radiale

Couples élevés
Transmission +

Sans clavette
Friction pure

Multi-tailles
Gamme RATHI

Moyeu à frette d'expansion conique — serrage par friction radiale

Pas de rainure de clavette — préserve la résistance de l'arbre

Capacité de transmission de couple supérieure aux moyeux standard

Démontage sans efforts de presse hydraulique

Idéal sur arbres lisses ou trempés non rainurables

Précision angulaire améliorée par l'absence de jeu de clavette

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Benefits

Why choose the SKS?

The SKS combines the simplicity of a jaw coupling with the robustness of a conical expansion sleeve.

01 / ADVANTAGE

High torques

The conical expansion sleeve distributes the clamping pressure over the entire hub length. Transmission capacity superior to an equivalent keyed hub — useful on high-torque transmissions.

02 / ADVANTAGE

Preserves the shaft

No keyway = no mechanical stress concentration in the shaft. The fatigue resistance of the shaft is preserved, its service life extended.

03 / ADVANTAGE

Clean removal

Sleeve removal is by unscrewing — no hydraulic press or puller needed, unlike pressed or tightly keyed hubs.

Fiche Technique

Features détaillées

Manufacturer technical data — SKS Expansion-Hub coupling.

Reference table — SKS (Flector Expansion Hub)

Données techniques détaillées disponibles dans la fiche PDF

The complete reference table (nominal torques, bores, dimensions, speeds) is available in the manufacturer's technical PDF datasheet. Download it below or ask us for a custom summary based on your application.

Datasheet — SKS

All sizes, dimensions, materials and torques available in the manufacturer's documentation.

PDF · 3Transmissions

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Product description

The SKS expandable-hub elastic coupling uses a conical expansion sleeve to lock the hub on the shaft. Clamping is done by radial friction, without a key, over the entire hub length.

This system offers several advantages: torque transmission capacity superior to an equivalent keyed hub, preservation of the mechanical strength of the shaft (no stress concentration from a keyway), improved angular precision (no keyway backlash), and removal by simply unscrewing without requiring a hydraulic press.

The SKS is particularly suited to high-torque transmissions on smooth or non-keyable hardened shafts, as well as applications where shaft service life is critical.

Conical-expansion-sleeve hub — radial friction clamping
No keyway — preserves shaft strength
Torque transmission capacity superior to standard hubs
Removal without hydraulic press effort
Ideal on smooth or non-keyable hardened shafts
Improved angular precision through absence of keyway backlash

Technical view — SKS