Опис
Задній міст EP-800UTV
UTV Rear Axle Assembly for 800CC–1000CC Four-Wheel-Drive Utility Terrain Vehicles | Gear Ratio 3.7 | Integrated Differential Lock
1. Technical Specifications — EP-800UTV Rear Axle Assembly
The following table details the engineering parameters of this rear drive axle assembly. Scroll horizontally on mobile devices to view all columns.
| No. | Параметр | Symbol | Value / Unit |
|---|---|---|---|
| 1 | Model Number | — | EP-800UTV |
| 2 | Application | — | 800CC–1000CC 4WD UTV (with differential lock) |
| 3 | Передавальне число | U | 3.7 (37/10) |
| 4 | Max Input Torque | T max | 320 N·m |
| 5 | Max Input Rotation Rate | n max | 6,500 r/min |
| 6 | Centre-to-Centre Spacing | А | 85 mm |
| 7 | Input Spline Type | — | Internal Spline |
| 8 | Input Spline Module | m | 1.25 |
| 9 | Input Spline Teeth Count | z | 26 |
| 10 | Input Pressure Angle | α | 20° |
| 11 | Output Spline Type | — | Internal Spline |
| 12 | Output Spline Module | m | 1.05833 |
| 13 | Output Spline Teeth Count | z | 27 |
| 14 | Output Pressure Angle | α | 45° |
| 15 | Overall Length | L | 374 mm |
| 16 | Axle Track (Width) | W | 203 mm |
| 17 | Overall Height | H | 220 мм |
| 18 | Assembly Weight | G | 16.7 kg |
| 19 | Differential Lock | — | Integrated, Mechanical Sliding Collar |
| 20 | Quality Certification | — | ІАТФ 16949:2016 |
2. Advantages of UTV Rear Axle Assembly
The EP-800UTV UTV Rear Axle Assembly is designed from the ground up for utility terrain vehicles running engine displacements between 800CC and 1000CC in four-wheel-drive configurations. This rear wheel axle assembly incorporates a rear axle gearbox with a fixed gear ratio of 3.7, achieved through a 37-tooth ring gear meshing with a 10-tooth pinion. The assembly uses internal spline interfaces at both the input and output ends, enabling clean, backlash-minimized connections to the vehicle driveshaft and rear hub components. The input spline features a module of 1.25 with 26 teeth and a 20-degree pressure angle, while the output interface runs a module of 1.05833, 27 teeth, and a 45-degree pressure angle — parameters that reflect deliberate engineering choices to balance torque transmission efficiency against spline contact durability under reversing loads.
At the system level, the rear end axle assembly integrates a mechanical differential lock that a driver can engage to eliminate wheel speed differentiation between the left and right rear outputs. This is particularly valuable in soft sand, loose gravel, or waterlogged terrain — all surface types common to recreational and work UTV use in the Bahrain desert corridor, coastal flatlands, and GCC construction zones. The unit’s overall weight of 16.7 kg positions it competitively against comparable rear complete axle assembly offerings in the 800–1000CC segment. All internal rotating components are bathed in gear oil that circulates under normal operating conditions, reducing friction-generated heat and extending component service life well beyond typical replacement intervals.
3. Five Key Advantages of the EP-800UTV
Integrated Differential Lock
The built-in mechanical differential lock allows operators to instantly equalize rear axle torque distribution, providing positive traction on loose sand, rocky surfaces, and wet ground without requiring a separate add-on locker or external modification. This is an OEM-level feature rarely found on budget-tier rear axle assembly parts.
Precision-Cut Internal Splines
Both the input and output spline interfaces are precision-machined to tight tolerances on four-axis CNC machining centers. The 20° pressure-angle input spline and 45° pressure-angle output spline are profile-ground after heat treatment, ensuring clean engagement, minimal backlash, and resistance to fretting under cyclic torque reversals — a common failure point in lower-grade rear cv axle assembly units.
Compact, Lightweight Architecture
At 16.7 kg and fitting within a 374 × 203 × 220 mm envelope, the complete rear axle assembly keeps unsprung mass low, helping the UTV maintain suspension compliance and ride quality over rough terrain. The compact design also simplifies rear chassis packaging and reduces the complexity of rear axle assembly showing internal parts during serviceability checks.
IATF 16949:2016 Quality Assurance
Every EP-800UTV unit passes through an intelligent automated online performance test bench before dispatch. Backed by IATF 16949:2016 quality management system certification — the most rigorous standard in the automotive supply chain — each rear axle assembly replacement shipped undergoes dimensional verification, gear backlash measurement, and no-load run-in checks as standard protocol.
OEM-Compatible Drop-In Fitment
The EP-800UTV is designed to replace or replicate OEM rear axle specifications for 800–1000CC UTV platforms including widely sold models in Bahrain and GCC markets. Identical spline counts, matching gear ratios, and equivalent mounting geometry mean installation requires no additional machining or adapter components — a critical factor for commercial fleets and rental operators seeking to minimize downtime.
4. How the UTV Rear Axle Assembly Works
The EP-800UTV functions as the final gear reduction and torque splitting unit in the UTV rear drivetrain. Drive torque from the engine-gearbox unit travels rearward through the prop shaft and enters the rear axle gearbox via the input internal spline (module 1.25, 26 teeth, 20° pressure angle). Inside the housing, a helical pinion gear meshes with the ring gear at a 37:10 ratio, reducing the incoming rotational speed by a factor of 3.7 while simultaneously multiplying output torque proportionally — a fundamental principle known as gear reduction. The ring gear is bolted to the differential case, which houses a set of bevel spider gears and side gears. Under straight-line driving, these differential gears allow the left and right output axle shafts to rotate at different speeds when the vehicle corners, preventing tire scrub and drivetrain bind.
When the differential lock is engaged — either mechanically or via a cable linkage from the cab — a sliding collar splines the differential case directly to one output shaft, mechanically coupling both rear axles to turn at the same rate. This forces equal torque to both rear wheels regardless of traction conditions, which is the defining function that makes a rear differential axle assembly with integrated locker superior to an open differential unit in off-road situations. Lubrication is provided by splash-fed gear oil contained within the sealed housing, with oil circulation driven by the rotating ring gear. The output ends connect via the internal output splines (module 1.05833, 27 teeth, 45° pressure angle) to the rear axle shafts that carry torque to the wheel hubs. This complete rear axle assembly system is engineered to handle sustained full-throttle operation, repeated shock loading from jump landings, and the slow-speed high-torque demands of muddy or sandy terrain typical of Bahrain off-road parks and GCC industrial sites.
5. Materials & Construction
The material selection for the EP-800UTV rear axle assembly prioritizes strength-to-weight ratio, fatigue resistance, and thermal stability — all critical properties for a component subjected to repetitive high-torque loading in hot, dusty environments like those encountered in Bahrain and the Arabian Peninsula.
The ring gear and drive pinion are manufactured from 20CrMnTi alloy case-hardening steel, which undergoes carburizing followed by controlled quenching to achieve a surface hardness of 58–62 HRC at the tooth flanks while maintaining a tougher, ductile core at around 30–40 HRC. This dual-hardness profile gives the gear teeth exceptional pitting and scuffing resistance without becoming brittle under shock load. The differential bevel gears and side gears are produced from 20CrMo alloy steel, also carburized and case-hardened, selected for its ability to sustain repeated torque reversal — a daily occurrence during off-road driving. Axle shafts are forged from 42CrMo high-tensile alloy steel and induction-hardened at the spline zone to handle torsional fatigue over extended service life.
The gearbox housing is die-cast from ADC12 aluminum alloy, which provides adequate structural rigidity at roughly one-third the density of cast iron. The lightweight aluminum housing helps keep the overall rear complete axle assembly weight at 16.7 kg. All bearing seats are bored to H7 tolerance after housing casting, and tapered roller bearings at the ring gear shaft and output shaft positions are sourced from verified suppliers to ISO 3290-1 ball and roller bearing standards. Sealing is provided by lip-type oil seals on all rotating shaft exits, with the lip geometry and garter spring tension calibrated to retain SAE 80W-90 mineral gear oil at operating temperatures up to 120°C — a temperature that can be reached during sustained low-speed, high-load desert terrain operation.
6. Сценарії застосування
Desert Recreation & Dune Riding (Bahrain / GCC)
Recreational UTV operators in Bahrain, Saudi Arabia, and the UAE regularly subject their vehicles to the high-torque demands of sand dune climbing and high-speed desert flat runs. The EP-800UTV rear ATV axle assembly’s integrated differential lock prevents one-wheel spinning during dune ascents, while the 3.7:1 final ratio maintains sufficient low-end torque for sustained sand-displacement driving without overheating the gearbox. The sealed housing and oil-retaining lip seals resist fine-sand ingestion even in blowing desert wind conditions.
Agricultural & Rural Utility Operations
In agricultural contexts across the Middle East, Southeast Asia, and North Africa, 800–1000CC UTVs serve as workhorses for spraying, livestock feeding, and field inspection. The rear wheel axle assembly in these applications must withstand sustained low-speed, high-torque hauling across uneven terrain. The EP-800UTV’s mechanical differential lock and robust 42CrMo axle shafts are well-matched to the slow, twisting loads generated when a loaded UTV traverses field furrows or rocky hillside tracks. The unit’s 320 N·m max input torque rating provides adequate headroom even when the vehicle is towing a trailer or mounted with a rear implement.
Construction Site & Industrial Patrol Vehicles
Oil field patrol vehicles, pipeline inspection UTVs, and security perimeter vehicles used at industrial sites in Bahrain and across the GCC often need to navigate unpaved service roads, gravel berms, and compacted desert soil. For these duty cycles, a rear drive axle assembly with consistent torque distribution and long service intervals is essential to minimize maintenance downtime. The EP-800UTV’s IATF 16949:2016-certified manufacturing process ensures unit-to-unit consistency, which fleet procurement managers actively seek when sourcing rear axle assembly replacement parts for multi-vehicle fleets.
OEM Integration for UTV Manufacturers
UTV manufacturers producing 800CC–1000CC models benefit from integrating the EP-800UTV rear differential axle assembly as a plug-in drivetrain module. The standardized spline interfaces (26T input, 27T output) and compatible gear ratio make it a straightforward fitment into existing chassis architectures. Production-volume customers can leverage the manufacturer’s annual output capacity of 500,000+ drivetrain units and the existing portfolio of ATV/UTV rear axle gearbox series spanning 250CC to 1000CC to consolidate supply chain sourcing across multiple UTV platform sizes.
7. Regulatory Compliance & Industry Standards
Buyers sourcing a UTV Rear Axle Assembly for use in Bahrain and neighboring GCC countries should be aware of the applicable regulatory and certification framework governing vehicle drivetrain components. Below is an overview of relevant standards across key markets:
Bahrain & GCC Region
Bahrain follows the Gulf Standards Organization (GSO) framework for automotive parts and vehicle systems. The GSO 1907 standard for automotive spare parts quality, along with SASO (Saudi Standards, Metrology and Quality Organization) technical regulations that are adopted GCC-wide, apply to drivetrain components including rear axle assemblies. Imported UTV parts entering Bahrain may be subject to conformity assessment under the Bahrain Customs Affairs authority and must comply with the Ministry of Industry, Commerce and Tourism (MOICT) import clearance requirements. Off-road recreational vehicles operating on private land in Bahrain are generally exempt from road registration standards, but commercially operated UTVs on industrial sites may fall under the National Bureau for Revenue (NBR) vehicle classification rules. Buyers should verify current GSO technical regulations with local customs agents before finalizing large purchase orders.
European Union
In EU member states, off-road vehicle components including rear axle gearboxes may fall under Machinery Directive 2006/42/EC when the assembly is supplied as part of a machine system. CE marking requirements under this directive involve a Technical File, Declaration of Conformity, and essential health and safety requirement (EHSR) compliance. The ISO 6336 standard for calculation of load capacity of spur and helical gears is widely referenced for gear durability validation in European OEM qualification processes.
United States & Canada
UTVs sold in the United States are regulated by the Consumer Product Safety Commission (CPSC) under ANSI/SVIA 1-2017 for recreational off-highway vehicles. Drivetrain components must meet the durability and performance requirements tied to these vehicle certifications. The AGMA (American Gear Manufacturers Association) standards — including AGMA 2001-D04 for fundamental rating factors and AGMA 6034 for worm gear drives — are reference documents for gear assembly quality audits in North American supply chains.
Australia & New Zealand
Australian Design Rules (ADRs) administered by the Department of Infrastructure, Transport, Regional Development, Communications and the Arts govern vehicle systems entering the Australian market. Off-road UTVs used on farms and stations often fall under state-level machinery safety regulations. WorkSafe Australia guidance on plant safety is relevant when UTVs are operated in workplace settings, and drivetrain components contributing to safe operation should carry traceable quality certification — such as ISO 9001 or IATF 16949:2016.
ISO Standards Applicable Globally
Regardless of jurisdiction, the EP-800UTV rear axle assembly aligns with the following internationally recognized standards: ISO 9001:2015 (Quality Management Systems), ISO 1328-1 (Cylindrical Gear Accuracy), ISO 6641 (Bevel Gear Measurement), and DIN 5480 (Involute Splines — the reference standard used when designing the input and output spline interfaces). The manufacturing facility holds IATF 16949:2016 certification, which subsumes ISO 9001 and adds automotive-sector-specific requirements covering part approval processes, production monitoring, and corrective action systems.
8. About the Manufacturer
Over two decades of focused engineering development in this product category has produced a technical library of validated designs covering more than 20 series and 100 individual specifications, including the complete rear axle assembly series to which the EP-800UTV belongs.
Our production facilities operate intelligent automated assembly lines alongside precision four-axis CNC machining centers, supported by a metrology laboratory equipped with coordinate measuring machines (CMMs), gear inspection centers, metallographic microscopes, and online integrated performance test benches. This infrastructure allows every rear axle assembly replacement unit to be dimensionally verified and dynamically tested prior to dispatch. Our quality management system is certified to IATF 16949:2016 — the automotive industry’s most rigorous supply chain standard — ensuring that our processes meet or exceed the requirements of tier-1 vehicle manufacturers globally.
Our R&D capability spans drivetrain 1D system modeling, 3D CAE finite element analysis (including housing topology optimization, gear tooth strength, and bearing load analysis), NVH (noise, vibration, harshness) performance development, and full test verification including durability endurance, thermal cycling, and shock load validation. We hold more than 60 granted national patents across structural innovations, sealing mechanisms, and differential lock designs. Our products serve OEM partners in the automotive, new energy vehicle, and specialty vehicle sectors, with annual production capacity exceeding 500,000 drivetrain units across all product lines.
Майстерня
9. Related Products — One-Stop Rear Axle System Sourcing
Our full Rear Axle Assembly series is designed to work as a complete, compatible system. To simplify your sourcing process and ensure drivetrain-level compatibility, we also manufacture the following complementary components:
Колісні болти
Precision-grade wheel fasteners engineered to the same dimensional and metallurgical standards as our axle assemblies, ensuring secure wheel-to-hub torque retention across all operating loads. Compatible with the rear wheel axle assembly hub flange specifications. Sourcing wheel bolts from the same supply chain as your UTV Rear Axle Assembly eliminates thread pitch and load rating mismatches that can cause premature fastener fatigue.
Балка осі причепа / шпиндель причепа
For customers who run their UTVs with purpose-built trailers, we supply Trailer Axle Beams and Trailer Spindles engineered for load ratings compatible with 800–1000CC UTV towing capacities. These components integrate with standard hub and bearing configurations to keep the trailer’s running gear dimensionally consistent with the host vehicle’s rear wheel axle assembly, reducing cross-fleet parts inventory complexity and supporting a true one-stop rear axle supply arrangement.
Часті запитання
Редактор: PXY
