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EP — Universal Joint With 4 Welder Plate Type Round Bearings

Heavy-duty universal joint engineered for demanding driveline applications. Figure-E configuration, welder plate mounting, precision-ground round bearing cups — built to SAE and ISO standards, stocked for the Colombian and broader Latin American aftermarket.

The EP series universal joint with four welder plate type round bearings represents one of the most widely deployed drivetrain components across the automotive, commercial vehicle, and agricultural machinery sectors. Unlike conventional yoke-style assemblies, this variant uses welded flange plates that bolt directly to companion flanges on propeller shafts and differential inputs — eliminating the need for slip-yoke machining and significantly reducing installation time on the workshop floor.

Each universal joint in this EP series features four precision round bearing cups held in position by the welder plates. The cups rotate on needle rollers that are factory-packed with high-temperature, extreme-pressure grease, giving the assembly the long service intervals demanded by long-haul truck operators and fleet managers throughout Bogotá, Medellín, Cali, and the wider Colombian market

1. Technical Specifications — EP Universal Joint With 4 Welder Plate Type Round Bearings (FIG E)

All dimensions are in millimetres. D = Trunnion diameter; L = Overall length; WX = Dana/Spicer cross-reference; Precision, GKN, Alloy, and Rockwell columns show equivalent OEM part numbers for cross-referencing purposes.

FIG	PART NO	D (mm)	L (mm)	WX	PRECISION	GKN	ALLOY	ROCKWELL
E	5-115X	39.68	115.42	4225AF	332	HS308	1757	CP115X
E	5-279X	47.618	135	5200AGF	333	HS336	1807	CP16NS
E	5-279X-1	47.618	135	5200AGF	333	HS336	1807	CP16NS
E	5-280X	49.195	154.755	5278AGF	334	HS337	1802	CP17NS
E	5-280X-1	49.195	154.755	5278AGF	334	HS337	1802	CP17NS
E	5-407X	49.195	177.93	6269AGF	376	HS338	1808	CP176NS
E	5-407X-1	49.195	177.93	6269AGF	376	HS338	1808	CP176NS
E	5-281X	49.195	191.8	7225AGF	381	HS334	1810	CP18NS
E	5-281X-1	49.195	191.8	7225AGF	381	HS334	1810	CP18NS
E	5-124X	59	167.5	6228AGF	335	HS324	1804	CP124X
E	5-308X	55.5	206	—	388	HS348	—	—

Note: D = trunnion pin diameter (mm); L = overall cross length (mm); WX = Spicer/Dana cross-reference number. Cross-reference numbers are provided for identification purposes only.

automatictransmissionpart-products-EP-Universal Joint With 4 Welder Plate Type Round Bearings-draft

2. ஐந்து முக்கிய தயாரிப்பு நன்மைகள்

① Welder-Plate Precision Fit

The four flange plates are machined to tight tolerances and welded before grinding, so the bolt-circle diameter stays true even under cyclical bending loads. This design removes wobble that would otherwise appear on conventional pressed-cap assemblies, keeping NVH levels low over the vehicle’s service life. For operators running heavy payloads on Colombian mountain roads, that translates directly into longer bearing life and reduced maintenance cost per kilometre.

② Wide Cross-Reference Coverage

Every part number in this series cross-references to at least one of the four major numbering families — Precision, GKN, Alloy, and Rockwell — so distributors and workshops do not need to stock multiple brands. A single SKU satisfies demand from independent garages handling everything from light utility trucks to heavy commercial rigs, making inventory management significantly leaner for parts dealers in Latin America.

③ High-Load Needle-Roller Bearing Cups

The round bearing cups are manufactured from case-hardened alloy steel with a controlled surface finish on the cup bore. Needle rollers fill the cup to the nominal complement, maximising the dynamic load rating for a given envelope size. This matters in steering universal joint and steering column universal joint applications where operating angles can reach 35° and shock loads are transmitted directly through the cross assembly.

④ ISO 9001 Quality System Backing

Production follows a certified quality management system with in-process dimensional inspection and final hardness verification. Heat treatment records are traceable to batch level, and finished assemblies are tested for grease retention before packaging. Buyers in Colombia, Ecuador, and Peru can request inspection certificates that satisfy local customs and quality audit requirements without additional third-party testing.

⑤ Broad Dimensional Range

With trunnion diameters from 39.68 mm up to 59 mm and overall lengths from 115.42 mm to 206 mm, the EP series covers a wide spread of driveline geometries from mid-size passenger vehicles all the way up to full-frame truck platforms. One supplier, one quality system, and one point of contact for the entire range simplifies procurement for fleet purchasing departments and distributors alike.

3. Universal Joint Working Principle

ஒரு universal joint transmits rotational torque between two shafts that are not perfectly aligned — either because they meet at an angle or because their relative angle changes dynamically as the drivetrain flexes over bumps and corners. The mechanism at the heart of every U-joint is the cross (also called the spider or trunnion), a cruciform forging whose four arms fit into the bearing cups housed in two opposing yokes. When one shaft rotates, the cross pivots simultaneously in two planes, allowing the driven shaft to rotate even though its axis diverges from the driving shaft.

An important characteristic of this geometry is that the output shaft’s velocity is not perfectly constant when the joint operates at an angle — it cycles twice per revolution, slightly faster and then slightly slower than the input. This is called the Cardan velocity variation. In practical driveline layouts, engineers cancel this variation by using two universal joint assemblies phased 90° apart, which is the standard arrangement for a two-joint propeller shaft. The operating angle at each end must be equal and the joint planes must be parallel for true cancellation.

In the welder plate configuration, the four bearing cups are retained not by snap rings or U-bolts but by hardened steel flange plates that are resistance-welded (or MIG-welded) to the yoke ears, then precisely ground on the seating surface. This design inherently centres the cup relative to the yoke bore to a tighter tolerance than snap-ring retention, which is why the welder plate style is preferred in applications with high operating angles or significant shock loading — including heavy-duty universal joint truck driveshafts and off-road machinery.

The round bearing cup contains a full complement of needle rollers running directly on the hardened trunnion pin surface. Grease is packed into the cup during assembly and is retained by a lip seal at the open end. In service, the seal must exclude road contamination while retaining grease under centrifugal force — which is why cup hardness, seal lip material, and grease viscosity all appear as specified parameters in the technical data sheet.

4. Material & Construction

The spider (cross) forging is produced from medium-carbon alloy steel, typically 20CrMnTi or equivalent, which delivers the right combination of core toughness and surface hardenability. After rough machining, the trunnion pins undergo carburising followed by quench hardening to achieve a case depth and surface hardness specified to resist spalling under the Hertzian contact stresses generated by the needle rollers. A light temper follows the quench to relieve residual tensile stress at the case surface.

The bearing cups are deep-drawn from cold-rolled steel strip and then through-hardened to the Rockwell C hardness range appropriate for needle-roller contact. Cup bore finish is controlled to Ra ≤ 0.4 µm to ensure uniform load distribution across the needle complement. The welder plates themselves are mild steel stampings, resistance-welded to the yoke ears under controlled current and pressure parameters, and the weld zone is subsequently ground flat to ensure the cup seating face is perpendicular to the yoke bore axis.

Seals are nitrile rubber (NBR) lip seals for standard temperature applications. Each assembly is pre-lubricated with lithium-complex NLGI #2 grease, which remains stable at temperatures from −30 °C to +130 °C — covering the full operating envelope of most passenger car and commercial truck drivelines. Some variants in this series also accept a grease nipple fitting for periodic re-lubrication in high-duty-cycle applications such as mining haulage trucks operating in the Andes.

5. பயன்பாட்டுச் சூழ்நிலைகள்

Heavy-Duty Trucks & Buses

Long-haul freight trucks and intercity buses operating routes across Colombia — including the Ruta 40 and the Troncal del Caribe — subject their driveshafts to sustained high torque and significant angular misalignment at the differential yoke. The EP welder plate universal joint handles the torsional demands of laden GVW configurations, while the precision-ground cups keep vibration signatures within the acceptable bands set by the OEM for passenger comfort and cargo protection.

Light Commercial Vehicles & Pickup Trucks

Mid-size pickup trucks and light vans form the backbone of last-mile delivery fleets in Colombian cities. The 5-115X and 5-279X series parts fit many of the most popular platforms in this segment, offering an affordable, OEM-equivalent universal joint replacement that restores driveline smoothness and eliminates the vibration and clunking noise that indicate worn bearing cups. Workshops report installation times of under 30 minutes for experienced technicians.

Agricultural Machinery

Tractors and harvesting equipment operating in the Llanos Orientales and in the Cauca Valley river valleys rely on PTO driveshafts that incorporate universal joint assemblies at every articulation point. The larger-diameter variants — 5-124X (59 mm) and 5-308X (55.5 mm) — are particularly suited to this environment, where the operating angle of a tractor power shaft can exceed 20° during headland turns and the torque reversals from engagement and disengagement cycles demand robust trunnion-to-cup interference fits.

Mining & Construction Equipment

Off-highway equipment used in Colombia’s coal and nickel mining regions, as well as in road-building projects in the Cordillera, imposes shock loads on driveshaft components that would quickly fatigue a standard automotive universal joint. The welder plate retention system, combined with the higher dynamic load ratings of the larger-bore EP models, makes this series a dependable choice for articulated dump trucks, motor graders, and drilling rigs where unplanned downtime carries significant financial consequences.

Steering Column & Industrial Shafting

The smaller-diameter variants in this EP series can also serve steering universal joint மற்றும் steering column universal joint duties in industrial vehicles where a double-Cardan configuration is not practical. Industrial conveyors, mixer drives, and pump shafting in food processing and petrochemical plants also use universal joint crosses from this size range when continuous-duty, moderate-angle operation at controlled torque is required.

automatictransmissionpart-products-EP-Universal Joint With 4 Welder Plate Type Round Bearings

6. Regulatory & Standards Compliance

International standards: The design and testing of this universal joint series aligns with ISO 8667 (Road vehicles — universal joints for propeller shafts) and SAE J901, which together govern dimensional tolerances, torque capacity declarations, and endurance test protocols for automotive driveline crosses. These standards define minimum fatigue life requirements under oscillating torque loading, and all EP series crosses are validated against those requirements before production release.

Colombia — NTC/ICONTEC: In Colombia, automotive replacement parts destined for vehicles used in public service (taxis, intercity buses, cargo trucks) must comply with applicable Normas Técnicas Colombianas (NTC) standards issued by ICONTEC, and vehicles must pass the Revisión Técnico-Mecánica y de Gases (RTMG). Driveline components that fail during inspection constitute a safety defect under the Colombian Road Traffic Act (Código Nacional de Tránsito Terrestre, Ley 769 de 2002). Supplying components that meet ISO or SAE-equivalent specifications ensures they satisfy RTMG inspectors when driveshaft condition is evaluated.

Broader Latin America: In Ecuador, INEN standards (Instituto Ecuatoriano de Normalización) apply to automotive safety components. Brazil requires ABNT NBR standards for driveline parts used in vehicles registered under DENATRAN/SENATRAN oversight. Mexico’s NOM-086 covers vehicle safety components in the commercial transport sector. While each country maintains its own regulatory framework, ISO 8667 compliance is broadly accepted as evidence of technical adequacy across the region’s standards bodies.

ஐரோப்பிய ஒன்றியம்: Within the EU, Regulation (EC) No 661/2009 on the general safety of motor vehicles and its delegated regulations set requirements for driveline components. Products intended for the European aftermarket additionally reference ECE-R regulations administered by UNECE, and the quality management system certification (ISO 9001) supports CE marking documentation where required.

அமெரிக்கா: FMCSA regulations (Federal Motor Carrier Safety Administration) require that commercial motor vehicle driveshafts maintain structural integrity under FMVSS-related inspection criteria. SAE J416 provides the torque capacity test methodology most commonly cited in North American procurement specifications. The EP series’ compliance with SAE J901 dimensional standards ensures straightforward compatibility with North American OEM and aftermarket interchange systems.

7. எங்களைப் பற்றி

We are a specialist manufacturer and global supplier of universal joint assemblies, driveshaft crosses, and related drivetrain components with more than two decades of experience supplying the automotive, commercial vehicle, agricultural, and industrial sectors. Our engineering team maintains a deep catalogue of interchange data, allowing us to match customer requirements to the correct part number across the major OEM and aftermarket numbering families — including Precision, GKN, Alloy, Rockwell, Dana/Spicer, and GMB.

Our production facility operates under a certified ISO 9001 quality management system with complete traceability from raw material receipt through to final packaging. Dimensional inspection equipment includes coordinate measuring machines (CMM) for trunnion geometry verification, surface-finish profilometers for cup bore quality control, and Rockwell hardness testers for heat-treatment confirmation.

பட்டறை

8. Related Products — Complete Driveline Solutions

ஒரு universal joint operates as part of a larger driveline system. Pairing it with compatible companion components from the same supply source eliminates fitment uncertainty and simplifies warranty claims. We also supply the following components that work directly alongside the EP U-joint series:

சக்கர மைய அலகுகள்

Our automotive wheel bearing and wheel hub assemblies are engineered to the same dimensional and metallurgical standards as the EP U-joint series. A matched hub and universal joint from a single supplier means the entire outboard driveshaft assembly — from the inboard slip yoke to the outer CV or U-joint — comes from one quality system, one source of traceability, and one point of contact for technical support. Explore our full range of Wheel Hub products for your application.

Wheel hub unit compatible with universal joint

Axle Shafts

Our axle shaft range covers both solid rear axles and independent front axle configurations, including stub shafts and full-float half-shafts that mate directly with the EP welder plate universal joint yoke flanges. Sourcing the axle shaft and the universal joint replacement cross together eliminates the risk of dimensional incompatibility at the companion flange interface — a common cause of vibration after non-OEM driveshaft repairs. See our complete selection of Axle Shaft products for vehicle-specific fitment data.

Rear axle compatible with universal joint

அடிக்கடி கேட்கப்படும் கேள்விகள்

Q1. What is a universal joint and what role does it play in a vehicle’s drivetrain?

A universal joint is a mechanical coupling device that transfers rotational torque and motion between two shafts whose axes are not perfectly aligned. In a typical rear-wheel-drive vehicle, the propeller shaft must accommodate the height difference between the transmission output and the differential input — as the suspension moves, the angle at each end of the propeller shaft changes dynamically. The U-joint allows that angular change while still transmitting engine torque continuously, making it an essential component for any driveline layout that involves misaligned or moving shafts.

Q2. What is the main function of a universal joint in a heavy-duty truck operating in Colombia?

In a heavy-duty truck serving Colombian routes — where highway elevations range from sea level to over 3,500 metres and road conditions vary enormously — the universal joint must accommodate the angular misalignment between the transmission and the differential while handling the full rated torque of the engine under loaded conditions. It also absorbs minor drivetrain misalignment caused by frame flex, which is significant in laden flatbed and tanker configurations. Without a properly functioning U-joint, vibration, noise, and eventually catastrophic driveshaft failure would result.

Q3. What are the different universal joint types available and which one is best for my truck application in Latin America?

The most common universal joint types in the automotive and commercial vehicle aftermarket are the Cardan (single or double), the constant-velocity (CV or Rzeppa) joint, and the tripod joint. For rear propeller shaft applications on trucks and heavy commercial vehicles — the most common scenario in Latin American fleets — the Cardan U-joint with welder plate retention, like the EP series described here, is the industry standard choice. CV joints are preferred for front-axle driveaxles where constant velocity is required for steering smoothness, while tripod joints appear in certain front-wheel-drive platforms. For a truck’s main propeller shaft, the welder plate Cardan universal joint remains the most cost-effective and robust option.

Q4. How does a steering universal joint differ from a driveshaft universal joint in terms of design and operating requirements?

A steering universal joint operates at lower torque levels than a driveshaft U-joint but must function at higher operating angles — sometimes exceeding 35° — and requires low backlash to avoid play in the steering response. The steering column universal joint also operates at relatively slow rotational speeds compared to a driveshaft cross. Driveshaft U-joints, by contrast, must handle high torque at high RPM with minimal angular variation per revolution. The EP welder plate series is primarily designed for driveshaft applications, but the smaller-diameter variants are used in certain industrial steering and intermediate shaft arrangements where the operating angle and torque level fall within the rated capacity of the assembly.

Q5. Which universal joint part number crosses over to GKN HS336 for a fleet procurement order in Bogotá?

GKN HS336 crosses directly to EP part numbers 5-279X and 5-279X-1 in the welder plate series. Both carry a trunnion diameter of 47.618 mm and an overall length of 135 mm, and they also cross-reference to Precision 333 and Alloy 1807 / Rockwell CP16NS. For fleet procurement teams placing bulk orders from Bogotá, these two SKUs are often stocked together since one serves as the standard fit and the other covers a slightly different cap retention arrangement on certain platform variants — confirming the specific chassis requirement with your vehicle data before ordering is always recommended.

Q6. What is the correct installation procedure for a universal joint with welder plate type round bearings on a commercial truck driveshaft?

Begin by marking the driveshaft and yokes before removal so they can be re-phased correctly on reassembly — incorrect phasing reintroduces the velocity variation that the two-joint layout is designed to cancel. Clean the bearing cup bores in both yokes and inspect for fretting wear or cracks. Press the new bearing cups squarely into the yoke bores using a proper cross-and-bearing installation tool — never drive them in with a hammer, as this risks damaging the cup bore finish and bending the seal lips. Torque the welder plate bolts to the vehicle manufacturer’s specification and verify that the cross rotates freely with no binding. Rebalance the propeller shaft if it was balanced as an assembly before removal.

Q7. How does a universal joint in a car differ from the one used in agricultural equipment on Colombian farms?

A universal joint in a car typically operates at continuous high speed under moderate and fairly constant torque, with the operating angle fixed by the suspension geometry. The failure mode is usually fatigue after many million cycles at that angle. A tractor or harvester PTO universal joint, by contrast, operates at lower average speeds but experiences much larger torque impulses during implement engagement, plus the operating angle changes substantially when the tractor articulates on headlands. This means agricultural U-joints need higher static and shock torque capacity relative to their dynamic fatigue rating — which is why the larger EP variants like 5-124X and 5-308X, with trunnion diameters of 59 mm and 55.5 mm respectively, are particularly popular with agricultural machinery dealers in the Colombian interior.

Q8. What is a universal joint impact socket and how is it used when servicing driveshafts in a Colombian workshop?

A universal impact joint — sometimes called a universal impact socket adapter — is a drive-tool accessory used in vehicle workshops to allow an impact wrench or ratchet to reach fasteners at angles that a straight extension cannot access. It is distinct from the drivetrain universal joint described in this product listing, although the same articulated cross principle underlies both. In a Colombian workshop setting, technicians use universal impact joint adapters when removing the flange bolts that retain welder plate U-joints on propeller shafts where access is restricted by chassis crossmembers or exhaust components. Pairing the right adapter with a calibrated torque wrench for final tightening helps ensure the welder plate bolts reach the specified clamping force without stripping the threads.

பதிப்பாசிரியர்: PXY

4 வெல்டர் பிளேட் வகை வட்டத் தாங்கு உருளைகளுடன் கூடிய EP-யுனிவர்சல் ஜாயிண்ட்

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EP — Universal Joint With 4 Welder Plate Type Round Bearings

1. Technical Specifications — EP Universal Joint With 4 Welder Plate Type Round Bearings (FIG E)