PTO Shaft Friction Torque Limiter – FFT Series (Belleville Spring, Yoke Type)

The FFT Series Friction Torque Limiter employs Belleville spring technology for consistent, temperature-stable preload on friction discs in PTO shaft applications. Rated at 800–2000 Nm, the Belleville disc spring design maintains uniform clamping force throughout the operating temperature range, providing more consistent torque limiting than conventional coil-spring designs. Standard yoke housing with 1 3/8″ Z6 spline hub and Φ120 to Φ160 friction disc options. Belleville spring consistency, temperature-stable performance, और compact low-profile design make this the precision choice for PTO applications demanding tight torque tolerance over varying conditions.

विवरण

PTO Shaft Friction Torque Limiter – FFT Series (Belleville Spring, Yoke Type)

Friction Torque Limiter for PTO shaft - 4FFT0 series

The PTO Shaft Friction Torque Limiter – FFT Series (Belleville Spring, Yoke Type) यह प्रीमियम गुणवत्ता का है friction torque limiter यह विशेष रूप से कृषि, औद्योगिक और वानिकी मशीनरी में उपयोग होने वाले पीटीओ (पावर टेक-ऑफ) ड्राइव शाफ्ट सिस्टम के लिए डिज़ाइन किया गया है। इसे इस नाम से भी जाना जाता है। पीटीओ स्लिप क्लच, पीटीओ सुरक्षा क्लच, या ट्रैक्टर पीटीओ ओवरलोड प्रोटेक्टरयह उपकरण आपके महंगे उपकरणों को अचानक लगने वाले टॉर्क ओवरलोड, अवरोधों और परिचालन संबंधी रुकावटों से होने वाले नुकसान से बचाता है।

उपलब्ध मॉडल: 4FFT0, 5FFT0, 4FFT1, 4FFT1D, 5FFT1, 5FFT1D, 6FFT1, 6FFT1D, 5FFT2, 5FFT2D, 5FFT2C, 5FFT2E, 6FFT2, 6FFT2D, 6FFT2C, 6FFT2E, 7FFT2, 7FFT2D, 7FFT2C, 7FFT2E, 7NFFT2, 7NFFT2D, 7NFFT2C, 7NFFT2E, 8FFT2, 8FFT2D, 8FFT2C, 8FFT2E, 6FFT4, 6FFT4D, 6FFT4C, 6FFT4E, 7FFT4, 7FFT4D, 7FFT4C, 7FFT4E, 7NFFT4, 7NFFT4D, 7NFFT4C, 7NFFT4E, 8FFT4, 8FFT4D, 8FFT4C, 8FFT4E

टॉर्क रेंज: टॉर्कः: 800–2000 Nm

स्प्लाइन विकल्प: 1 3/8″ Z6, 1 3/8″ Z21, 1 3/4″ Z6, 1 3/4″ Z20

ज़रूरी भाग: Belleville spring, Pressure plate, Friction discs (Qty.=2), Hub, Taper pin for hub (with nuts), Bushing, Flanged yoke, Complete bolt (Qty.=8)

मूल्य निर्धारण के लिए अनुरोध करें →

तकनीकी विशिष्टताएँ और आयाम

शृंखला Max Torque (Nm) घर्षण डिस्क Spline ए (मिमी) बी (मिमी) सी (मिमी)
4FFT0 800 Φ120 1 3/8″Z6 150 29 Φ160
5FFT0 800 Φ120 1 3/8″Z6 152 29 Φ160
4FFT1 900 Φ140 1 3/8″Z6 150 29 Φ180
5FFT1 900 Φ140 1 3/8″Z6 152 29 Φ180
6FFT1 900 Φ140 1 3/8″Z6 160 29 Φ180
5FFT2 1200 Φ160 1 3/8″Z6 152 29 Φ200
6FFT2 1200 Φ160 1 3/8″Z6 164 29 Φ200
7FFT2 1200 Φ160 1 3/8″Z6 169 29 Φ200
7NFFT2 1200 Φ160 1 3/8″Z6 164 29 Φ200
8FFT2 1200 Φ160 1 3/8″Z6 169 29 Φ200
6FFT4 1600 Φ160 1 3/8″Z6 172 30.5 Φ200
7FFT4 2000 Φ160 1 3/8″Z6 177 30.5 Φ200
7NFFT4 2000 Φ160 1 3/8″Z6 172 30.5 Φ200
8FFT4 2000 Φ160 1 3/8″Z6 177 30.5 Φ200

* सभी माप मिलीमीटर में हैं। टॉर्क मान न्यूटन-मीटर (Nm) में हैं। स्प्लाइन विनिर्देश ISO/ASAE मानकों के अनुरूप हैं। अनुकूलित कॉन्फ़िगरेशन के लिए हमसे संपर्क करें।

PTO shaft torque limiter Friction Torque Limiter technical drawing and assembly

मुख्य विशेषताएं और लाभ

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एकाधिक आउटपुट कॉन्फ़िगरेशन

किसी भी स्थापना आवश्यकता के अनुरूप योक, स्प्लाइन शाफ्ट और फ्लैंज्ड आउटपुट वेरिएंट में उपलब्ध है।

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सटीक ओवरलोड सुरक्षा

इसे सटीक टॉर्क सीमा पर डिस्कनेक्ट करने के लिए कैलिब्रेट किया गया है, जिससे गियरबॉक्स, बियरिंग और उपकरण तंत्रों को होने वाले महंगे नुकसान को रोका जा सके।

Rapid Response Time

Triggers within milliseconds of overload onset, minimizing the duration of damaging torque transfer to connected equipment.

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Easy Maintenance & Service

Simple modular design allows fast field service with standard tools. Replacement parts are readily available and affordable.

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Industrial-Grade Materials

Precision-machined from hardened alloy steel with heat-treated critical surfaces for maximum durability and service life.

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Universal PTO Compatibility

Standard 1 3/8″ Z6 spline interface fits all major tractor and implement PTO shafts without adapters or modification.

यह कैसे काम करता है — संचालन सिद्धांत

This friction torque limiter uses Belleville disc springs (conical washer springs) instead of conventional coil springs to clamp friction discs against the hub. Belleville springs provide several critical advantages: they maintain consistent clamping force across a wide temperature range, they have a compact axial profile, and they can be stacked in series or parallel to achieve precise spring rate and preload characteristics. When the torque exceeds the friction capacity set by the Belleville spring preload, the discs begin to slip progressively, absorbing excess energy without abrupt disconnection. The torque setting is adjusted by changing bolt tension on the spring pack. This design delivers tighter torque tolerance and more repeatable performance than coil-spring friction limiters.

रीसेट विधि: Automatic — continuous slip and re-engagement

इसके लिए सबसे उपयुक्त: Precision applications requiring tight torque tolerance, temperature stability, and compact installation length

कृषि अनुप्रयोग के विशिष्ट परिदृश्य

पोस्ट होल डिगर

जब ऑगर बिट चट्टान, दबे हुए कंक्रीट या घने जड़ समूहों से टकराता है तो यह अत्यधिक टॉर्क शॉक को अवशोषित करता है, जिससे ऑगर ड्राइव और ट्रैक्टर पीटीओ दोनों की सुरक्षा होती है।

स्नो ब्लोअर और स्नो थ्रोअर

यह बर्फ के टुकड़ों, जमे हुए मलबे और संकुचित बर्फ के ढेरों से होने वाले नुकसान से सुरक्षा प्रदान करता है, जो इम्पेलर शाफ्ट पर अचानक, अत्यधिक टॉर्क लोड उत्पन्न करते हैं।

रोटरी मोवर और फ्लेल मोवर

जब ब्लेड छिपे हुए पत्थरों, ठूंठों या धातु के मलबे से टकराते हैं, तो यह मोवर गियरबॉक्स को क्षति से बचाता है। टॉर्क लिमिटर झटके को अवशोषित करता है और इसे ट्रैक्टर के पीटीओ तक पहुंचने से रोकता है।

हे बेलर और राउंड बेलर

स्लग फीडिंग के दौरान बेलर मैकेनिज्म को होने वाले नुकसान, ट्विन रैपिंग में खराबी या बाहरी वस्तु के प्रवेश को रोकने के लिए, नुकसानदायक टॉर्क स्तर तक पहुंचने से पहले ड्राइवलाइन को डिस्कनेक्ट कर दिया जाता है।

रोटरी टिलर और कल्टीवेटर

यह टिलर गियरबॉक्स और ट्रैक्टर पीटीओ की सुरक्षा करता है जब टाइन दबी हुई चट्टानों, जड़ों या संकुचित मिट्टी की परतों से टकराते हैं जो अत्यधिक टॉर्क स्पाइक्स उत्पन्न कर सकते हैं।

PTO shaft torque limiter in agricultural tractor application

टॉर्क लिमिटर प्रकार की तुलना

विशेषता बॉल डिटेंट घर्षण डिस्क कतरनी पिन/बोल्ट रैचेट (पॉल) स्वचालित (कैम)
टॉर्क रेंज न्यून मध्यम मध्यम ऊँचाई कम-बहुत उच्च उच्च निम्न मध्यम ऊँचाई
गति सीमा 540–1000 आरपीएम 540–1000 आरपीएम 540–1000 आरपीएम 540–1000 आरपीएम 540–1000 आरपीएम
रीसेट विधि स्वचालित स्वचालित (स्लिप) मैनुअल (बोल्ट बदलें) स्वचालित (रैचेट) स्वचालित (कैम)
सर्वश्रेष्ठ आवेदन प्रकाश उपकरण बार-बार मध्यम भार कभी-कभार होने वाले गंभीर ओवरलोड बार-बार क्षणिक ओवरलोड उच्च उपयोग, कोई उपभोग्य वस्तु नहीं
उपभोग वाले हिस्से कोई नहीं घर्षणरोधी परत (दीर्घकालिक) कतरनी बोल्ट कोई नहीं कोई नहीं
टॉर्क परिशुद्धता मध्यम अच्छा (समायोज्य) उत्कृष्ट (बोल्ट-ग्रेड कैलिब्रेटेड) अच्छा बहुत अच्छा (समायोज्य)

स्थापना एवं उपयोग मार्गदर्शिका

स्थापना के चरण

स्टेप 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.

चरण दो: 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? हमारी इंजीनियरिंग टीम से संपर्क करें 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

PTO drive shaft torque limiter manufacturing workshop

Frequently Asked Questions (FAQ)

What torque rating do I need for my implement?

The required torque rating depends on your implement’s maximum operating torque. As a general rule, select a torque limiter rated at 1.2 to 1.5 times the implement’s normal peak operating torque. Consult your implement manufacturer’s specifications or contact our engineering team for personalized guidance.

How do I know when the torque limiter has activated?

Depending on the type: shear bolt limiters show a visibly sheared bolt; ratchet limiters produce a distinct clicking sound during slip; friction limiters emit a slight odor and sound during sustained slipping; automatic cam limiters produce a clicking sensation. In all cases, the implement stops receiving power while the PTO shaft continues turning.

Can I adjust the torque setting?

Friction-type and automatic (cam-type) torque limiters allow field adjustment of the torque setting by changing spring preload through bolt tension. Shear bolt types are set by the bolt grade and cannot be adjusted — different torque ratings require different bolt specifications. Ratchet types have a fixed setting determined by the number and spring rate of the pawls.

What maintenance does the torque limiter require?

Regular greasing through the grease nipple (every 8 operating hours), visual inspection for wear or damage before each season, and replacement of worn friction linings (friction types) or keeping spare shear bolts on hand (shear bolt types). Automatic and ratchet types require minimal maintenance beyond lubrication.

Is this torque limiter compatible with my PTO shaft?

This product uses standard 1 3/8″ Z6, 1 3/8″ Z21, 1 3/4″ Z6, 1 3/4″ Z20 spline connections, which are compatible with the vast majority of agricultural PTO shafts worldwide. If your equipment uses a different spline configuration, we offer adapters and custom spline options. Contact us with your shaft specifications for confirmation.

What is the difference between 540 RPM and 1000 RPM PTO?

Standard PTO operates at 540 RPM and is used for most agricultural implements. Economy PTO (also called 1000 RPM PTO) is used for lighter implements to reduce engine RPM and fuel consumption. Our torque limiters are rated for both speeds. Select the spline size matching your PTO standard: typically 1 3/8″ Z6 for 540 RPM and 1 3/4″ Z20 for 1000 RPM.

Do you offer OEM and private-label manufacturing?

Yes, we provide full OEM manufacturing services including custom torque ratings, special spline configurations, custom markings, and private-label packaging. Minimum order quantities apply. Contact our sales team at the link below to discuss your requirements.

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.”

★★★★★

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Matched gearboxes designed to work seamlessly with our PTO shafts and torque limiters.

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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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OEM & distributor partnerships welcome · MOQ as low as 10 units · Custom specifications available