Beschreibung
PTO Shaft Automatic Torque Limiter – SCF151/SCF176 Series (with Flange)
Der PTO Shaft Automatic Torque Limiter – SCF151/SCF176 Series (with Flange) ist von Premiumqualität automatic torque limiter Speziell entwickelt für Zapfwellenantriebe (PTO), die in Land-, Industrie- und Forstmaschinen eingesetzt werden. Auch bekannt als Zapfwellen-Rutschkupplung, Sicherheitskupplung der Zapfwelle, oder Überlastschutz für TraktorzapfwelleDieses Gerät schützt Ihre teuren Anlagen vor Schäden durch plötzliche Drehmomentüberlastungen, Blockaden und Betriebsstörungen.
Verfügbare Modelle: SCF151, SCF151.D, SCF151.C, SCF151.E, SCF176, SCF176.D, SCF176.C, SCF176.E
Drehmomentbereich: Drehmoment: 1600–4500 Nm
Spline-Optionen: 1 3/8″ Z6, 1 3/8″ Z21, 1 3/4″ Z6, 1 3/4″ Z20
Hauptkomponenten: Outer housing + flange, Bushing, Spring pack, Hub with taper pin and bushings, Bushing, Sealing ring, O-ring, Locking plate, Snap ring, Bushing (Qty.=4), Cam (Qty.=4), Taper pin (with nuts)
Technische Daten und Abmessungen
| Serie | Torque (Nm) | Spline | A (mm) | B (mm) | C (mm) |
|---|---|---|---|---|---|
| SCF151 | 1600 | 1 3/8″Z6 | 171 | 29 | Φ168 |
| SCF151.D | 2100 | 1 3/8″Z21 | 171 | 29 | Φ168 |
| SCF151.C | 2600 | 1 3/4″Z6 | 171 | 29 | Φ168 |
| SCF151.E | 2800 | 1 3/4″Z20 | 171 | 29 | Φ168 |
| SCF176 | 3000 | 1 3/8″Z6 | 175 | 28 | Φ176 |
| SCF176.D | 3500 | 1 3/8″Z21 | 175 | 28 | Φ176 |
| SCF176.C | 4000 | 1 3/4″Z6 | 175 | 28 | Φ176 |
| SCF176.E | 4500 | 1 3/4″Z20 | 175 | 28 | Φ176 |
Alle Maße in Millimetern. Drehmomentwerte in Newtonmetern (Nm). Die Keilwellenspezifikationen entsprechen den ISO/ASAE-Normen. Für kundenspezifische Konfigurationen kontaktieren Sie uns bitte.
Hauptmerkmale und Vorteile
🛠
Universelle Nebenantriebskompatibilität
Die standardmäßige 1 3/8″ Z6-Keilwellenaufnahme passt ohne Adapter oder Modifikationen auf alle gängigen Zapfwellen von Traktoren und Anbaugeräten.
⛳
Sealed & Protected Design
Grease-lubricated internals with dust seals protect against contamination in harsh agricultural environments.
📈
Wide Torque Selection Range
Available in multiple torque ratings (1600–4500 Nm) to match virtually any PTO-driven implement requirement.
⚖
Safety Certified
Manufactured under ISO 9001:2015 quality management with CE marking for European and international compliance.
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Compact & Lightweight
Engineered for minimal additional length and weight on the PTO shaft, preserving driveline balance and clearance.
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Mehrere Ausgangskonfigurationen
Erhältlich in Ausführungen mit Joch, Keilwellenantrieb und Flanschausgang, um allen Installationsanforderungen gerecht zu werden.
Funktionsweise – Funktionsprinzip
The automatic torque limiter employs a precision cam-and-spring mechanism for fully self-resetting overload protection. Four hardened steel cams ride in matching profiles on the hub, held in engagement by a calibrated spring pack. Under normal torque, the cams remain seated in their profiles, transmitting full power. When an overload forces the torque above the spring preload setting, the cams ride up out of their pockets, and the clutch slips. The rotating direction indicator shows the limiter’s status. Once the overload clears, the cams re-seat automatically on the next revolution. The spring pack preload can be adjusted to fine-tune the trip torque, and the sealed housing with O-rings and sealing rings protects internal components from contamination.
Zurücksetzen-Methode: Fully automatic — cam re-engagement within one revolution
Am besten geeignet für: High-utilization equipment requiring maintenance-free, consumable-free overload protection
Typische Anwendungsszenarien in der Landwirtschaft
Feed Mixers & TMR Wagons
Safeguards the mixer auger drive from damage caused by twine wrap, frozen feed blocks, or excessive loading that generates torque beyond design limits.
Grain Augers & Conveyors
Prevents auger tube distortion and gearbox failure when grain bridges, moisture-swollen grain, or foreign objects create sudden resistance in the conveying path.
Pfahlbohrer
Absorbiert extreme Drehmomentstöße, wenn der Bohrkopf auf Gestein, vergrabenen Beton oder dichte Wurzelmassen trifft, und schützt so sowohl den Bohrantrieb als auch die Zapfwelle des Traktors.
Schneefräsen & Schneeschleudern
Schützt vor Beschädigungen durch Eisbrocken, gefrorene Trümmer und verdichtete Schneewehen, die plötzliche, extreme Drehmomentbelastungen auf die Laufradwelle ausüben.
Rotationsmäher und Schlegelmäher
Schützt das Getriebe des Mähwerks vor Beschädigungen, wenn die Messer auf versteckte Steine, Baumstümpfe oder Metallteile treffen. Der Drehmomentbegrenzer absorbiert die Stoßbelastung und verhindert, dass sie die Zapfwelle des Traktors erreicht.
Vergleich der Drehmomentbegrenzer-Typen
| Besonderheit | Kugelarretierung | Reibscheibe | Scherbolzen | Sperrklinke | Automatik (Nockenwelle) |
|---|---|---|---|---|---|
| Drehmomentbereich | Niedrig bis mittel | Mittel bis hoch | Niedrig bis sehr hoch | Niedrig–Hoch | Mittel bis hoch |
| Geschwindigkeitsbereich | 540–1000 U/min | 540–1000 U/min | 540–1000 U/min | 540–1000 U/min | 540–1000 U/min |
| Reset-Methode | Automatisch | Automatik (Schlupf) | Anleitung (Schraube ersetzen) | Automatisch (Ratsche) | Automatisch (Nockenwelle) |
| Beste Anwendung | Leichte Geräte | Häufige, mäßige Überlastungen | Seltene schwere Überlastungen | Häufige kurzzeitige Überlastungen | Hohe Auslastung, keine Verbrauchsmaterialien |
| Verbrauchsmaterialien | Keiner | Friction linings (long life) | Shear bolts | Keiner | Keiner |
| Torque Precision | Moderate | Good (adjustable) | Excellent (bolt-grade calibrated) | Good | Very Good (adjustable) |
Installation & Usage Guide
Installation Steps
Step 1: Verify that the PTO shaft spline size matches the torque limiter spline specification (1 3/8″ Z6, 1 3/8″ Z21, 1 3/4″ Z6, 1 3/4″ Z20). Clean all spline surfaces thoroughly.
Step 2: Slide the torque limiter onto the PTO shaft spline, ensuring full engagement. Secure with the provided push pin kit or retaining hardware.
Step 3: Connect the output side (yoke or splined shaft) to the implement input shaft or gearbox. Ensure proper alignment and secure all fasteners to the recommended torque.
Step 4: Apply grease through the grease nipple to lubricate the spline interface and internal components. Use lithium-based EP grease (NLGI #2).
Step 5: Perform a low-speed test run to verify correct engagement and smooth operation before full-power operation.
Safety & Maintenance Tips
⚠ Always disengage the tractor PTO before inspecting or servicing the torque limiter.
⚠ Use only genuine replacement parts specified for your series to maintain the correct torque rating.
⚠ Re-grease spline connections every 8 operating hours or as specified in your equipment manual.
⚠ Inspect for wear, cracks, or damage before each season. Replace worn components immediately.
⚠ Never operate with damaged or missing PTO shaft safety shields.
Selection Guide — Choosing the Right Model
Selecting the correct torque limiter requires confirming the following parameters:
✓ Required Torque Rating (Nm): Match the implement’s maximum operating torque plus a 20–30% safety margin.
✓ PTO Shaft Spline Size: Commonly 1 3/8″ Z6 (6-spline) or 1 3/4″ Z6/Z20. Verify both input and output spline requirements.
✓ PTO Speed: Standard 540 RPM or economy 1000 RPM — confirm your implement’s requirement.
✓ Connection Type: Yoke output for standard shaft tubes, splined shaft for inline assemblies, or flanged output for direct gearbox mounting.
✓ Overload Frequency: Frequent overloads favor auto-reset types (ratchet, friction, automatic). Infrequent but severe overloads suit shear bolt types.
✓ Environmental Conditions: Consider dust, moisture, temperature extremes. Sealed automatic and friction types offer superior protection in harsh environments.
Need help choosing? Kontaktieren Sie unser Ingenieurteam. for personalized selection assistance.
Quality Certification & Service Commitment
✅
ISO 9001:2015
Certified quality management system ensuring consistent product excellence
✅
CE Marked
Compliant with European safety, health, and environmental protection standards
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12-Month Warranty
Full warranty against manufacturing defects under normal operating conditions
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Global Shipping
Fast worldwide delivery with professional export packaging and documentation
Frequently Asked Questions (FAQ)
What Our Customers Say
🇦🇷 Miguel R. — Ranch manager, Buenos Aires Province, Argentina
“Outstanding durability in our dusty Pampas conditions. We’ve been using these for two years on grain augers and feed mixers with zero failures. The sealed design keeps the dust out.”
★★★★★
🇺🇸 David H. — Equipment dealer, Iowa, United States
“Our customers keep coming back for these. The quality matches or exceeds European OEM brands at a fraction of the cost. We stock the full range for combine, baler, and mower applications.”
★★★★★
🇳🇿 Craig W. — Dairy farmer, Waikato, New Zealand
“Using these on our pasture toppers and feed wagons. They’ve saved our PTO shafts from damage multiple times when hitting hidden stumps. Brilliant design — the auto-reset means we don’t lose any milking time.”
★★★★★
🇬🇧 William D. — Arable contractor, Yorkshire, United Kingdom
“Top-notch manufacturing quality. These drop straight onto standard UK PTO shafts and the torque ratings are spot-on. I’ve fitted them on cultivators, grain drills, and mowers — all performing perfectly.”
★★★★★
🇦🇺 James M. — Grain farmer, NSW, Australia
“We fitted these torque limiters on all our header drives after losing a gearbox last harvest. They’ve triggered twice on hidden rocks and saved us thousands in repairs each time. Absolutely essential equipment for Australian broadacre farming.”
★★★★★
Related PTO Shaft Products & Accessories
PTO Shaft Components
Complete range of PTO shaft yokes, cross bearings, tubes, shields, and adapters for all standard sizes.
Agricultural Gearboxes
Matched gearboxes designed to work seamlessly with our PTO shafts and torque limiters.
Available PTO Accessories:
• PTO shaft yokes (plain bore, splined, quick-release)
• Safety shields and guard tubes (EN 12965 compliant)
• Spline adapters (1 3/8″ to 1 3/4″ conversion)
• Cross bearing kits and U-joint repair kits
• Telescoping PTO shaft tubes (triangular and lemon profile)
• Push pin kits and retaining hardware
Ready to Protect Your Equipment?
Whether you need a single replacement unit or bulk OEM supply, our team is ready to help you select the perfect torque limiter for your application. We offer competitive B2B pricing, technical consultation, and fast global delivery.
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