ROSTA SE 18 Swiss Automatic Elastic Tensioner

Numéro de commande: 06 011 003 – Standard SE series maintenance-free elastic tensioning unit from ROSTA, Suisse. Designed for constant-tension automatic tensioning, vibration damping and elongation compensation on chain, timing belt and V-belt drives. Rubber elastic core, permanently lubrication-free.

SE 18 ：2026111115180210

SE 11: 2026111115190180

✅ Spécifications de base

Poids: 0.6 kilos

Central fixing thread: M10

Rubber compound: Rubmix 10 (natural rubber)

Température de fonctionnement: -40 ℃ ~ +80 ℃

Maximum pre-tension angle: ±30° from neutral position

Voyage: 50 mm

Tension (J1 standard mounting position)

10° preload: 75 N

20° preload: 185 N

30° preload: 350 N

Tightening torque MA: 49 N·m (M10, Classe 8.8)

📌 SE18 Variant Models (empreinte identique)

Modèle	Numéro de commande.	Caractéristiques	Rubmix / Plage de température
SE 18-G	06 013 203	Oil-resistant version, yellow dot marking	Rubmix20, -30~+90℃
SE 18-W	06 015 003	High-temperature version, red dot marking; tension 40% lower than standard	Rubmix40, up to +120℃
SE 18-R	06 011 703	Reinforced swing arm, for engine / compressor applications	Rubmix10, -40~+80℃
SE-I 18	06 071 112	Stainless steel version (nourriture / pharmaceutical service)	Rubmix10, -40~+80℃, poids 0.7 kilos
SE-B 18	06 021 003	Boomerang dual-arm design, triple compensation for long drive lines	Rubmix10, poids 0.8 kilos
SE-F 18	06 061 003	Front flange mounting version, blind-hole frame installation	Rubmix10, poids 0.7 kilos

🛠️ Typical Applications

Automatic tensioning for chain drives, V-belts, timing belts and conveyor belts

Elastic loading for belt scrapers / cleaners

Convoyage, conditionnement, travail du bois, impression, agricultural machinery and fan drives

Absorb shocks, reduce polygon effect, lower noise and prevent slip; no manual periodic retensioning required

🧩 Compatible Accessories

VS 15/18: Preload limit clamp (0–15°), for precise pre-tension setting

WS 18: Support de montage

N-series sprocket assemblies, P chain pressure blocks, R nylon tensioning rollers

SS safety sleeve (for slippery / rough mounting surfaces)

ROSTA SE 18 (Numéro de commande: 06 011 003) Automatic Tensioning Element

Ketten Fuchs compatible part. Standard maintenance-free rubber torsion spring tensioner from ROSTA Switzerland. Provides automatic elongation compensation and vibration damping, no lubrication required.

Informations de base

Modèle: SE 18

OEM Order No.: 06 011 003

Rubber compound: Rubmix 10 (natural rubber)

Température de fonctionnement: -40 ℃ ~ +80 ℃

Matériel: Steel housing and inner core, blue painted finish

Poids: 0.6 kilos

Working principle: Rubber torsion elastic unit, delivers constant tension torque with damping; no conventional springs or wear joints

Forcer & Travel Specifications

J1 mounting position (standard arm length 100 mm): Fmax = 350 N, max travel s = 50 mm

J2 mounting position (short arm 80 mm): Fmax = 440 N, max travel s = 40 mm

Dimensions hors tout (mm)

Paramètre	Valeur
D	58
E	79 (+1.5/-0.5)
G	7
H	M10 (central mounting thread)
J1	100
J2	80
K	30
L	115
M.	30
N	35
Ô	10.5
P.	8.5
T	10.5
U	25.3

SE18 Body Variants

SE 18-G (06 013 203): Oil-resistant Rubmix20, galvanized components, -30~+90℃

SE 18-W (06 015 003): Heat-resistant Rubmix40, -35~+120℃, tension 40% lower than standard SE

SE-F 18: Front flange mounting version

SE-I 18: Stainless steel version

SE-R 18: Reinforced arm version

Directives d'installation (Chain Drives Recommended)

Mount on the slack side of the chain, close to the small sprocket: increases wrap angle, suppresses polygon effect and prevents jumping teeth
Position the swing arm roughly parallel to the chain; recommended preload angle ≤20°, preload force ≤50% of rated value
Méthode d'installation: Central M10 bolt friction locking. To set preload: loosen the flange, rotate the housing with a wrench to set preload, then retighten the central bolt
Mounting surface must be flat and rigid; optional pin anti-rotation in flange slot for dusty / environnements difficiles

Applications typiques

Automatic constant tensioning for roller chains, timing belts and flat belts

Convoyeurs, machines d'emballage, travail du bois, glass equipment, lignes de production automatisées

Scraper compression, idler roller floating support and low-stroke vibration damping

Dépannage

Rubber cracking / vieillissement: Surchauffe, oil attack or long-term operation at maximum deflection; prefer SE-G oil-resistant variant
Tension decay: Rubber fatigue. The ROSTA rubber insert cannot be replaced separately; replace the complete unit
Bruit / chain jumping: Mounted on the tight side, preload angle exceeded, or large sprocket misalignment

Notes de remplacement

Equivalent national: Multiple domestic rubber torsion tensioners marked SE18. Verify J1/J2 force rating, central M10 thread and overall dimensions. Rubber compound determines temperature and oil resistance.

Selection Table for ROSTA SE 18 (06 011 003) Compatible N-Type Tension Sprockets

N = ROSTA original bearing-equipped idler sprockets, standard double-side shielded deep groove ball bearing 6200ZZ, bore 10 mm to fit SE18 arm pin hole. Single-row S / double-row D, for ANSI / ISO roller chains

Note: SE18 maximum tension 350 N; 15 teeth preferred. Minimum meshing teeth ≥3, ≥4 teeth recommended. Install on chain slack side

Modèle original	Numéro de commande.	ANSI Chain	ISO Code	Row	Teeth	Pitch Diameter(mm)	Tooth Width B(mm)
N3/8″–10 S	06 500 001	35 (3/8″)	06B	Single S	10	40.3	5.2
N3/8″–17 S	06 500 001-17T	35	06B	Single S	17	67.8	5.2
N1/2″–12 S	06 500 002	40 (1/2″)	08B	Single S	12	61.1	7.2
N1/2″–12 D	06 500 002D	40 (1/2″)	08B	Double D	12	61.1	7.2
N5/8″–12 S	06 500 003	50 (5/8″)	10B	Single S	12	76.4	9.1
N5/8″–12 D	06 500 003D	50 (5/8″)	10B	Double D	12	76.4	9.1
N3/4″–12 S	06 500 004	60 (3/4″)	12B	Single S	12	91.7	11.1
N3/4″–12 D	06 500 004D	60 (3/4″)	12B	Double D	12	91.7	11.1

Smooth Compression Rollers (RL series, no tooth engagement, for pressing outer chain plate)

Modèle	Numéro de commande.	Compatible SE	Roller OD	Largeur	Vitesse maximale
RL 15/18	06 580 902	SE15 / SE18	45 mm	40 mm	6000 tr/min

Contraintes de sélection (Critique)

Upper chain limit: SE18 not recommended for chain larger than 60 (12B) single row; 80 / 16B chain requires upgrade to SE27
Preload angle: Max recommended deflection ≤20°, preload force ≤50% rating (≤175 N) to prevent premature rubber ageing
Mounting pin: SE18 arm pin diameter d=10 mm; sprocket bore 10 mm with bearing, fit directly to arm hole and lock with M10 nut
Velocity limit: N sprocket max linear velocity ≤2.5 m/s; select SE27 above this speed
Matériel: Standard N sprocket C45 hardened steel; stainless steel sprockets available for food / wet service; RL rollers are black wear-resistant polyurethane

Domestic Equivalent Matching Requirements for Idler Sprockets

Alésage: 10 mm

Bearing: 6200ZZ

Tooth profile: OIN 8187 (DEPUIS), avoid non-standard American tooth forms which cause jumping teeth

Largeur hors tout: Must not interfere with SE18 tension arm side plates

Tightening Torque for SE18 Central Bolt

M10 Class 8.8: 49 Nm (tensioner body fixing bolt)

Guide de sélection rapide

06B / 35 → N3/8-10S

08B / 40 → N1/2-12S (SE18 preferred)

10B / 50 → N5/8-12S

12B / 60 → N3/4-12S (limite supérieure, careful application)

No meshing required, press chain plate → RL15/18 smooth roller

ROSTA SE Series Automatic Tensioning Elements Full Model List (Standard Units + Variantes)

Series description: Rubber torsion spring maintenance-free automatic tensioners for chain and belt drives. ROSTA Switzerland, SE = main standard series. Suffixes indicate application variants; same numeric size shares identical mounting envelope, only rubber compound and surface treatment differ.

Standard Base Models (SE Standard, Rubmix10, -40~+80℃, blue paint)

Modèle	OEM Order No.	Central Thread	Fmax @ J1 Arm	Poids
SE 11	06 011 001	M6	80 N	0.2 kilos
SE 15	06 011 002	M8	135 N	0.4 kilos
SE 18	06 011 003	M10	350 N	0.6 kilos
SE 27	06 011 004	M12	810 N	1.7 kilos
SE 38	06 011 005	M16	1500 N	3.6 kilos
SE 45	06 011 006	M16	2600 N	5.5 kilos
SE 50	06 011 007	M20	4200 N	8.0 kilos

Définition du suffixe

SE-G: Oil-resistant grade, Rubmix20, galvanisé, yellow dot mark; -30~+90℃ for oily, gearbox and outdoor environments

SE-W: High-temperature grade, Rubmix40, red dot mark; -35~+120℃; tension 40% lower than standard

SE-F: Montage sur bride avant, blind flange, cannot be bolted from rear; for space-restricted cabinet installation

SE-I: Stainless steel INOX (GX5CrNi19-10), nourriture, pharma and corrosive humid service

SE-R: Reinforced swing arm, white ring mark; engines, compresseurs, shock-load duty

SE-B (Boomerang): Dual-arm boomerang style, bi-directional tensioning for special belt circuits

SE-FE: Reinforced flange version, engine dedicated fixing design

Variants by Size

SE 11 Variantes

SE 11 (Standard)｜SE 11-G (Oil-resistant)

No standard factory SE11-W / SE11-I / SE11-R

SE 15 Variantes

SE 15｜SE 15-G｜SE 15-W｜SE-F 15｜SE-I 15｜SE-R 15

SE 18 Variantes (Votre modèle cible)

SE 18 (06 011 003)｜SE 18-G (06 013 203)｜SE 18-W (06 015 003)｜SE-F 18｜SE-I 18｜SE-R 18 (06 011 703)

SE 27 Variantes

SE 27｜SE 27-G｜SE 27-W｜SE-F 27｜SE-I 27｜SE-R 27

SE 38 Variantes

SE 38｜SE 38-G｜SE 38-W｜SE-F 38｜SE-I 38｜SE-R 38

SE 45 Variantes

SE 45｜SE 45-G｜SE 45-W｜SE-F 45｜SE-I 45｜SE-R 45

SE 50 Variantes

SE 50｜SE 50-G｜SE 50-W｜SE-F 50｜SE-I 50

Accessoires compatibles (Not SE body units)
N-series tension idler sprockets (N3/8, N1/2, N5/8, N3/4, N1″, single S / double D)
RL-series smooth polyurethane compression rollers (RL11, RL15/18, RL27, RL38)
SES / VS / SV: Preload adjustment tools
Chain slide pads, guide blocks, angle brackets
Quick Selection Notes
Same numeric size (par exemple. SE18 / SE18-G / SE18-W): identical outline and mounting hole geometry, only rubber compound and coating differ; interchangeable directement
SE-W high-temperature version has 40% reduced tension; select one size up during design
SE-I stainless steel: Coût plus élevé, same force rating as standard, nourriture & pharma use
SE-R reinforced arm: Pour les charges de choc; not recommended for normal chain conveyors due to premium cost
SE-F flange version: Different mounting interface; cannot directly replace center-thread SE standard units
Other ROSTA Elastic Units (Not SE series, easy to confuse)

RD, AB, AD-P, AS-P, Mo, ST, DK series. These are swing supports, vibration isolators and motor mounts, not automatic chain / belt tensioners. Do not mix up with SE series.