Strukturierte Komponentendaten · 2026

Carrier Body

The carrier body is the central structural component of a planetary gear system that houses and supports the planet gears.

Technische Definition und Einsatzkontext

Ein typisches Carrier Body wird in Maschinen- und Anlagenbau nach Material, Toleranz, Montage- und Anwendungskompatibilität sowie Ausfallrisiko bewertet.

The carrier body, also known as the planet carrier, is a critical rotating component within a planetary gear set. It serves as the mounting structure for the planet gears (satellite gears), which are evenly spaced and rotate on their own axes while also orbiting around the sun gear. The carrier body's primary functions are to maintain precise alignment and center distance between the planet gears and the sun/ring gears, transmit torque from the planet gears to the output shaft (or vice-versa depending on configuration), and withstand significant radial and axial loads generated during operation. Its design directly influences the gear set's load distribution, efficiency, and noise-vibration-harshness (NVH) characteristics.

Vollständige Spezifikationen anzeigen Geeignete Fertigungsquellen prüfen

Komponentenspezifikationen

Definition

Funktionsprinzip

The carrier body rotates as a unit with the planet gears. In a typical planetary system, one of the three main elements (sun gear, ring gear, or carrier) is held stationary, another is used as the input, and the third serves as the output. The carrier body's rotation is determined by the motion of the planet gears as they mesh with both the sun gear (at the center) and the ring gear (on the outer perimeter). Its design ensures that all planet gears share the load equally, providing high torque density and compact power transmission.

Materialien

Commonly forged or machined from medium-carbon alloy steels such as AISI 41404340or 8620 for high strength and toughness. For high-performance or weight-sensitive applicationsmaterials may include case-hardened steels (e.g.20MnCr5)ductile iron (e.g.GGG-40/50)or aluminum alloys (e.g.7075-T6) with appropriate heat treatment (quenching and temperingcarburizingor nitriding). Surface hardness typically ranges from 45-60 HRC for steel components to resist wear at gear bearing surfaces.

Weight

1-50 kg (varies with size and material)

Maximum RPM

500-10,000 rpm (depends on balance and lubrication)

Bore Diameter

20-200 mm (standard range)

Surface Finish

Ra 1.6-3.2 μm (critical bearing surfaces)

Flange Diameter

50-500 mm

Dynamic Load Rating

3-300 kN

Static Load Capacity

5-500 kN

Dimensional Tolerance

IT6-IT7

Number of Planet Gears

3, 4, 5, or 6 (most common)

Planet Pin Hole Diameter

10-100 mm

Normen

ISO 6336ISO 1328DIN 3960DIN 3961AGMA 2001AGMA 6110

Branchentaxonomie & Aliasse

Gebräuchliche Handelsnamen, technische Kennungen und Suchbegriffe für Carrier Body.

Uebergeordnete Produkte

Diese Komponente wird in den folgenden Industrieprodukten eingesetzt.

Planetenträger

Ein strukturelles Bauteil in Planetengetrieben, das die Planetenräder hält und trägt, sodass sie sich um das Sonnenrad drehen können, während die korrekte Ausrichtung und Teilung gewährleistet bleibt.

Produktdetails ansehen ->

FMEA · Fehleranalyse

Ursache → Fehlermodus → Engineering-Massnahme

Insufficient material strength or improper heat treatment->Crack propagation from stress concentrations (e.g., at pin holes)->Use certified alloy steels with Charpy impact testing; apply shot peening to compress surface layers; implement non-destructive testing (NDT) like magnetic particle inspection during manufacturing.

Poor lubrication or contaminated lubricant->Accelerated adhesive wear at planet pin interfaces, leading to increased clearance and impact loads->Specify appropriate EP (extreme pressure) gear oils with filtration systems; design integrated oil passages for direct lubrication; use hardened and ground pins with suitable surface finish.

Manufacturing errors in hole position or diameter->Uneven load distribution among planet gears, causing premature pitting or tooth breakage->Employ CNC machining with tool wear compensation; verify geometry with CMM (Coordinate Measuring Machine) inspection; implement statistical process control (SPC) for critical dimensions.

Excessive operating loads beyond design limits->Plastic deformation or brittle fracture of the carrier arms->Incorporate torque limiters or overload protection in the drive system; conduct finite element analysis (FEA) during design to validate stress levels; define clear operational limits in manuals.

Industrielles Ökosystem und technische Bewertung

Kompatibel mit

Planetary gearboxes Wind turbine gearboxes Automotive automatic transmissions Industrial mixers and agitators Construction machinery drivetrains Marine propulsion systems

Austauschteile

Bonfiglioli SEW-Eurodrive Flender Brevini Nord Gear Regal Rexnord Sumitomo Heavy Industries

Fatigue cracking due to cyclic torsional/bending loads

Wear at planet pin bore surfaces leading to misalignment

Bearing failure on planet pins causing seizure

Imbalance from manufacturing defects or damage inducing vibration

Corrosion in harsh environments weakening the structure

Konformität und Prüfung

tolerance

Geometric tolerances per ISO 1101:2017; hole position tolerance typically within ±0.02 mm; concentricity of bore to flange within 0.03 mm TIR

test method

Dimensional verification via CMM; hardness testing per ISO 6508 (Rockwell); magnetic particle inspection per ASTM E1444 for surface cracks; dynamic balance testing to ISO 1940-1 G2.5 grade; functional testing under load in gearbox assembly

Hersteller für diese Komponente

Relevante Herstellerprofile aus der CNFX-Komponentenfähigkeitstabelle.

Hersteller eintragen

Die Herstellerliste dient der Vorrecherche und Einordnung von Fertigungskapazitäten. Sie ist keine Zertifizierung, kein Ranking und keine Transaktionsgarantie.

Beispielhafte Bewertungskriterien aus Einkaufsprozessen

Keine Kundenbewertung und keine Echtzeitdaten. Die Werte zeigen typische Prüfkriterien in RFQ- und Lieferantenbewertungsprozessen.

Technische Dokumentation

4/5

Fertigungsfähigkeit

4/5

Prüfbarkeit

5/5

Lieferantentransparenz

3/5

Die Kriterien dienen als Orientierung für technische Einkaufsprüfungen. Konkrete Kunden, Länder, Bewertungsdaten oder Live-Nachfragen werden nur angezeigt, wenn entsprechende belastbare Daten vorliegen.

Haeufige Fragen

What is the difference between a carrier body and a planet carrier?

These terms are generally synonymous in industrial contexts. 'Carrier body' often emphasizes the structural housing aspect, while 'planet carrier' refers to the complete assembly including pins/bearings for the planet gears. Both describe the central component that holds the planet gears.

Why are carrier bodies typically made of alloy steel?

Alloy steels like 4140 or 4340 provide an optimal balance of high tensile strength, fatigue resistance, and toughness required to withstand the cyclic bending and torsional stresses in planetary gear systems. They also respond well to heat treatment for enhanced surface hardness and core durability.

How does the number of planet gears affect carrier body design?

More planet gears (e.g., 5 vs. 3) allow higher torque capacity and better load sharing but require a larger, more rigid carrier body with precise hole spacing to maintain equal load distribution. This increases manufacturing complexity and weight.

Can a damaged carrier body be repaired?

Typically not recommended. Critical wear or cracks in the planet pin holes or mounting surfaces compromise structural integrity and precise geometry. Replacement is standard practice to ensure system reliability and prevent catastrophic gear failure.

Kann ich Hersteller direkt kontaktieren?

CNFX ist ein offenes Verzeichnis, keine Handelsplattform und kein Beschaffungsagent. Herstellerprofile und Formulare helfen bei der Vorbereitung des direkten Kontakts.

CNFX Industrial Component Index · Maschinen- und Anlagenbau