The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 00638-79 |
| Category | O-Rings |
| Inner Diameter | 40 mm |
| Cross Section | 5 mm |
| Material | NBR 70 |
| Country of Origin | Sweden |
DescriptionThe whole story▼
O-Ring 40x5 NBR70 Low temp, Öhlins Artikelnummer 00638-79. Ein O-Ring wird über Innendurchmesser und Schnurstärke bestimmt, nie über den Außendurchmesser.
Wichtigste Merkmale
- Original Öhlins Serviceteil
- Schnurstärke 5 mm
- Innendurchmesser 40 mm
- Öhlins Artikelnummer 00638-79
- Werkstoff NBR 70
Was es ist
Als Maß nennt Öhlins Innendurchmesser 40 mm, Schnurstärke 5 mm, Werkstoff NBR 70. Die Dichtung hält das Öl im System und den Schmutz draußen. Die Vorspannung der Lippe kommt von einer eingelegten Ringfeder. Die Staubdichtung hält Schmutz ab, dichtet aber nicht gegen Öldruck.
Echtes Serviceteil
Öhlins hält Positionen oft über Modellgenerationen hinweg gleich, tauscht aber ohne Ankündigung Werkstoffe. Ein überholtes Federbein arbeitet wieder mit der Dämpfung, die im Datenblatt steht — vorausgesetzt, die Teile stimmen. Serienmäßige Positionen halten wir vorrätig; Sonderteile bestellen wir gezielt. Bei größeren Überholungen prüfen wir vorab, welche Positionen zusammengehören.
Bei Dichtungen und Führungen entscheidet ein Hundertstel Millimeter darüber, ob die Einheit dicht bleibt. Ein O-Ring altert auch ungenutzt; das Herstellungsdatum steht auf der Verpackung. Die Nut gibt die Verpressung vor; zu wenig dichtet nicht, zu viel zerstört den Ring. Der Werkstoff muss zur Öltemperatur passen, sonst härtet der Ring aus. Öhlins ändert Teile im Laufe einer Baureihe; die Nummer, nicht das Baujahr, sagt, was passt.
So passt es sicher
Der verlässliche Weg führt über die Explosionszeichnung: Position suchen, Nummer ablesen, bestellen — hier 00638-79. Undichtigkeit zeigt sich zuerst als Ölfilm auf der Welle, dann als Tropfen. Der Werkstoff ist auf die Öltemperatur abgestimmt, die im Betrieb entsteht.
Einbau und Abstimmung
Wir empfehlen, den Einbau von einem autorisierten Öhlins-Service-Center vornehmen zu lassen. Wir sind selbst eines und bieten die Arbeit an; fragen Sie einfach an.
Technische Daten
- Marke: Öhlins
- Artikelnummer: 00638-79
- Kategorie: O-Ringe
- Innendurchmesser: 40 mm
- Schnurstärke: 5 mm
- Werkstoff: NBR 70
- Herkunftsland: Schweden
Questions, one topic at a time.
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We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.
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Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.
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You have the right to cancel within 14 days of receiving your order. Register your return by email first; once it’s approved you have a further 14 days to send the goods back. Items should be unused and in their original packaging.
Register your return by email with your order number before sending anything back, and we’ll send you the return instructions. Please note: returns that aren’t registered in advance can’t be accepted.
The quickest way is to place a new order for the size you need and register a return for the original by email — just let us know it’s an exchange.
We’re sorry — that shouldn’t happen. Contact us with your order number and a photo as soon as you can, and we’ll arrange a replacement or refund right away. Faulty goods are always covered by your statutory warranty.
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For customers in the EU, prices are shown including your country’s local VAT. For customers outside the EU, prices are shown without VAT — instead, your country’s import taxes and duties may apply on delivery (see the customs question).
Yes. Your invoice is attached to your order confirmation email and is also available in your account.
Yes. We’re an authorised dealer, so every product is 100% original and comes with the full manufacturer warranty.
Yes. Everything we sell is genuine and comes with the manufacturer’s warranty, on top of your statutory rights. Keep your invoice as proof of purchase and contact us if you ever need to make a claim — we’ll help you through it.
Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.