Yoke Assembly Manufacturers in India

PTC Drivelines is a reputable Yoke Assembly Suppliers in India for forged parts and a supplier of forged yoke assemblies for Komatsu HD785-7 and Komatsu HD785-5 mining dump trucks in India. We offer a variety of front and rear yokes in flange, slip, end, and companion flange options in a wide range of sizes and for a variety of applications to fit OEM dimensions and application requirements. 

The yokes are made from forged alloy steel (IS 2062 / EN 10083) and precision CNC machined to ensure critical bore, spline, fork span, and flange tolerances. With many years of expertise in supplying propeller shaft yokes in India, we offer dimensional inspection documentation and material traceability for heavy equipment workshops, propeller shaft overhaul, and mining fleets. All completed items are OEM cross-referenced and dispatched for inspection. PTC Drivelines can also accommodate custom yoke requirements for equipment that is not within the scope of the standard HD785 product line by referencing OEM part numbers, physical samples, and/or dimensions for compatibility verification and manufacturing.

Key Metrics

What Is a Yoke Assembly?

(Also called: Slip Yoke, Flange Yoke, End Yoke, Companion Flange)

A yoke assembly is the forked steel component that connects the propeller shaft to the spider assembly at each end of the driveline. Machined from a single forging, the two prongs of the yoke fork cradle the spider cross journal pins, transmitting rotational torque from the gearbox through to the differential while accommodating the constant angular changes produced by suspension travel and chassis flex.

 Because the yoke sits at the highest-stress junction of the entire propeller shaft assembly—carrying full driveline torque through a relatively small cross-sectional area—even minor dimensional error at this stage compounds into vibration, heat, and accelerated bearing wear further down the line.

There are two functional variants at either end of a typical propeller shaft. The flange yoke bolts directly to the gearbox output flange or the differential input flange using a matched bolt-circle pattern, forming a rigid, non-sliding connection. 

The slip yoke, by contrast, connects to the propeller shaft tube through an internal or external spline and is designed to telescope in and out—a small but critical amount of axial travel that lets the driveline lengthen and shorten as the axle moves through its suspension arc without placing the U-joints or gearbox bearings under end load.

In everyday workshop language these same parts are referred to interchangeably as a slip yoke, flange yoke, end yoke, or companion flange, and buyers researching a replacement often use whichever term their original service manual or parts catalog happens to use. PTC Drivelines' cross-reference process is built around this reality: rather than requiring a customer to know the precise engineering term, our team matches the request to the correct component using chassis details, OEM part number, or a physical sample.

Types of Yolk 

There are 2 types of yolk: 

1. Front Yoke

The front yoke assembly connects the gearbox output flange to the front spider assembly of the propeller shaft. It must be precisely machined to maintain the correct yoke-to-yoke phasing angle—the alignment of the two yoke forks at either end of the shaft relative to one another. Incorrect phasing causes propeller shaft vibration and accelerated UJ wear, because the two universal joints no longer cancel out each other's velocity fluctuations as the shaft rotates through an operating angle. On a two-plane driveline this error shows up as a distinct second-order vibration that grows with road or duty-cycle speed. As a specialized flange yoke manufacturer India and end yoke manufacturer India, PTC Drivelines ensures all front configurations strictly meet critical tolerance thresholds on bore concentricity, fork span, and flange face perpendicularity before dispatch.

2. Rear Yoke

The rear yoke assembly connects the rear spider assembly to the differential or axle input flange. Because the rear of the propeller shaft experiences the greatest range of angular movement as the axle articulates over uneven ground, the rear yoke typically has a slip section built in to accommodate suspension travel without stretching the shaft rigid between two fixed points. Yoke bore diameter and spline specification must match the differential input shaft exactly—a mismatch of even a few tenths of a millimeter on spline engagement can produce an audible clunk on load reversal and, over time, spline wear that eventually causes complete drive loss. Operating as a premier slip yoke manufacturer India, PTC's splined rear connections are engineered for dynamic load shifts typical of loaded and unloaded haul cycles in open-pit and underground mining operations.

Signs Your Yoke Needs Replacement

Some signs are mentioned to identify when your yoke assembly needs replacement: 

1. Yoke worn out of specification or cracked: Found during a regular propeller shaft inspection—this is treated as a critical safety component within fleet maintenance programs.
2. Vibration or phasing symptoms: A misphased or worn yoke produces second-order vibration at propeller shaft speed. Early warning signs include a low-frequency hum or shudder that intensifies with speed and load.
3. Visible movement at the slip yoke spline: Looseness becomes noticeable during acceleration and deceleration.
4. Loud clunk when reversing the load: Points to a spline condition or mismatch at the rear yoke end where it meets the differential input shaft.
5. During a propeller shaft overhaul: If you're replacing spider assemblies, the shaft tube, or balance weights, the yoke should be inspected as part of the job and replaced if worn. A marginal yoke will compromise the rest of the overhaul.

Recommended approach: Rather than waiting to replace a worn yoke, schedule regular inspections. A worn yoke accelerates wear across connected components simultaneously—including the U-joint needle bearings, gearbox output bearing, and differential pinion bearing.

Best Yoke Assembly Manufacturers in India—Komatsu OEM Compatible

PTC is known as trusted Yoke Assembly Manufacturers in India, which provides Precision-machined yoke assemblies for Komatsu HD785-7 and HD785-5 propeller shafts—front and rear. As an OEM-cross-referenced, forged-and-machined-alloy-steel manufacturer, PTC Drivelines supplies mining and heavy-equipment operators across various areas with ISO 9001:2015-certified propeller shaft components engineered to eliminate premature UJ wear and vibration-related downtime.

Trust Indicators

These are our indicators that make us more trustworthy:

• Komatsu HD785-7 Front & Rear — dimensionally verified against OEM drawings
• Komatsu HD785-5 Compatible — cross-checked across the shared HD785 platform
• Forged Alloy Steel—IS 2062 / EN 10083 grade, not mild-steel casting
• OEM Cross-Referenced—every part matched to original Komatsu part numbers
• Drop-In Replacement — no re-machining or adapter fabrication required on site

About PTC Manufacturing

Every yoke assembly begins as forged alloy steel—IS 2062 / EN 10083 grade—selected specifically for its combination of tensile strength and fatigue resistance under cyclic torsional loads. Forging, rather than casting, aligns the steel's internal grain flow with the part's stress paths, giving the fork arms and bore significantly better resistance to crack initiation than a cast equivalent of the same nominal dimensions.

After forging, each blank goes through precision CNC-machined yoke bores, holding bore, spline, and bolt-circle tolerances that are individually measured and logged against the original Komatsu drawing rather than a generic aftermarket approximation. Phasing alignment is marked directly on the finished part at this stage, so an installer in the field can orient the front and rear yokes correctly without needing a phasing gauge. 

Every finished assembly is OEM dimensionally cross-referenced for the Komatsu HD785 yoke assembly series and supplied with a complete dimensional inspection report from our facility, giving the customer's own quality team an independent record to check against incoming goods—a level of documentation that is uncommon among generic propeller shaft yoke India suppliers but standard practice at PTC.

Overview of Our Manufacturing Process

This is our structure of manufacturing yoke assembly:

• Forging: alloy billet forged to near-net shape, aligning grain flow with load path
• Rough machining: bore, fork span, and flange face brought to near-final dimension
• Heat treatment: controlled hardening and tempering to target fatigue strength
• Finish CNC machining: bore and spline held to ±0.01 mm on production equipment
• Phasing mark and 100% dimensional: inspection prior to packing and dispatch

Key Insight / Service Life

The yoke assembly phasing angle is critical—a misphased yoke causes second-order vibration at propeller shaft speed, and left uncorrected, this vibration accelerates wear on the U-joint needle bearings, the gearbox output bearing, and the differential pinion bearing simultaneously, turning a single misassembled component into a multi-part failure over a few hundred operating hours. Operators typically notice the earliest symptoms as a low-frequency hum or shudder that intensifies with speed and load, sometimes accompanied by visible movement at the slip yoke spline under acceleration and deceleration.

PTC yoke assemblies manufactured by an experienced dump truck yoke assembly manufacturer are marked for correct phasing and supplied with comprehensive installation instructions covering torque values for the flange bolt circle, recommended grease specification for the spline (where fitted), and a pre-commissioning inspection checklist. Correctly phased, correctly torqued, and properly lubricated, a forged and precision-machined yoke of this type is designed to run for the full service interval of the propeller shaft assembly it belongs to, rather than becoming the limiting component that drives an early teardown.

Can't Find Your OEM Part Number?

Our cross-reference database covers 200+ part numbers across multiple OEM brands, not just the HD785 series listed above. Send your OEM part number, and our engineering desk will confirm compatibility, availability, and lead time within 24 hours—including for chassis serial ranges that fall outside the standard listings.

OEM Part Number Cross-Reference Table

Total OEM Entries: 4 | Brands: KOMATSU

Technical Specifications & Comparison

Our yoke assemblies are precision-manufactured for reliable power transmission, accurate fitment, and durability in heavy-duty equipment. Suitable for OEM replacement, maintenance, and demanding industrial applications.

Industries & Applications

These are the industrial applications of yoke assembly in different models of the KOMATSU brand:

Komatsu HD785-7

Front and rear yoke assemblies — 561-20-71200 replacement India (front) and 561-20-72200 (rear). The HD785-7 is the most widely operated large dump truck in Indian mining, carrying high replacement demand as fleets accumulate operating hours across coal, iron ore, and limestone haulage routes in and neighboring mining belts.

Komatsu HD785-5

The same Komatsu HD785 yoke assembly OEM numbers are compatible with the HD785-5 generation, since Komatsu carried the propeller shaft interface forward largely unchanged across the model update. We recommend customers confirm compatibility with their chassis serial number range before ordering, particularly on trucks that have already had a non-OEM propeller shaft fitted at some point in their service history.

Mining Dump Trucks

Supplied directly by a trusted dump truck yoke assembly manufacturer, these components are replaced when the yoke bore is worn beyond spec or when yoke cracks are detected during routine propeller shaft inspection. Given the torque and duty cycle involved, the yoke is treated as a critical safety item on every fleet maintenance schedule we support, and we encourage scheduled inspection rather than run-to-failure replacement.

Propeller Shaft Overhaul

When rebuilding a propeller shaft—replacing spider assemblies, the shaft tube, or balance weights—the yoke should be verified by a specialized propeller shaft yoke manufacturer India and replaced if worn beyond tolerance, since re-using a marginal yoke against a freshly balanced shaft undermines the benefit of the rest of the overhaul.

Custom Yoke Supply

For equipment models not listed here, supply the OEM yoke number, yoke type (flange or slip), bore diameter, spline count, and flange bolt circle. As a flexible yoke assembly manufacturer India, PTC will cross-reference an existing design or manufacture a custom component to match, including for older or discontinued equipment where OEM support has lapsed.

Export Markets

HD785 yoke assemblies are supplied by a reliable propeller shaft yoke India supplier to mining operations in Indonesia, Australia, South Africa, the UAE, and other global markets and are available with a Certificate of Origin for customs clearance. As a companion flange manufacturer India serving both domestic and export customers, PTC packages shipments to withstand long-distance freight without corrosion or handling damage.

Quality Documentation (Supplied with Every Order)

These are the benefits we provide before every supply: 

ISO 9001:2015 Certificate

Cert. No.: IN/17/4015. This certification covers yoke assembly forging selection, machining, inspection, and dispatch processes end to end, giving customers a documented, auditable quality system behind every batch rather than a one-off inspection claim.

OEM Test Certification

Each shipment is accompanied by dimensional conformance documentation against Komatsu OEM specifications, covering yoke bore diameter, fork span, flange bolt circle, and overall length so the receiving quality team can verify fitment before the part reaches the workshop floor.

Dimensional Inspection Report

A signed measurement report accompanies every order, recording bore diameter, spline dimensions, fork span, flange face perpendicularity, and overall length as actual measured values against the OEM specification—not a generic pass/fail statement.

Material Mill Certificate

A forged alloy steel mill certificate is supplied with grade, heat number, chemical composition, and mechanical properties, confirming IS 2062 / EN 10083 compliance and giving full traceability back to the original steel heat used for that batch.

Your reliable yoke assembly exporter in India is ready to help you.

Reputable Yoke Assembly Exporters in India 

PTC Drivelines is a trusted Yoke Assembly Exporters in India and provides precision-engineered front and rear yoke assemblies for Komatsu HD785-7 and Komatsu HD785-5 mining dump trucks to international markets. Forged alloy steel yokes that have been precision CNC-machined and OEM cross-referenced for correct fitment, reliable torque transfer, and long service life in critical applications.

PTC Drivelines is a seasoned propeller shaft yoke exporter from India, offering flange yoke, slip yoke, end yoke, and companion flange solutions to mining fleets, equipment maintenance businesses, and propeller shaft overhaul experts. All shipments can be backed up by dimensional inspection reports, material traceability reports, mill certificates, and quality paperwork needed for overseas procurements.

Request OEM-Compatible Yoke Assembly Support 

For OEM cross-reference confirmation, technical drawings, or a quotation for HD785 front and rear yoke assemblies or any custom component, Contact PTC Drivelines' engineering industrial operations with the same dimensional documentation on every order, regardless of order size.