Wholesale Aftermarket Parts & Accessories for ATV/UTV, Off-Road
Heavy-duty 4340 chromoly steel CV axles, 4mm oversized shaft options, dual-hardness heat-treated joints, and TPE / TPEE boot options engineered for Polaris RZR Pro XP, XP 1000, Turbo S and Ranger applications. Custom lengths can be developed from customer requirements, OE references, drawings, or sample axles.
Browse our upgraded CV axle lineup engineered for high-performance UTV platforms. Custom lengths, extended lift kit fitments (+6″, +8″), and OEM packaging requirements can be discussed for wholesale distributor projects.
Material: 4340 Chromoly Steel. Core Hardness: 30-34 HRC, Surface Hardness: 46-50 HRC. Features a 4mm increase in shaft diameter for maximum torsional strength.
Material: 4340 Chromoly Steel. Core Hardness: 30-34 HRC, Surface Hardness: 46-50 HRC. 4mm oversized shaft diameter engineered for extreme rear wheel traction load.
Material: 4340 Chromoly Steel. Core Hardness: 30-34 HRC, Surface Hardness: 46-50 HRC. Precision-machined CV joint cage and race for stable articulation.
Material: 4340 Chromoly Steel. Core Hardness: 30-34 HRC, Surface Hardness: 46-50 HRC. TPE / TPEE boot and molybdenum grease options available based on application requirements.
Material: 4340 Chromoly Steel. Core Hardness: 30-34 HRC, Surface Hardness: 46-50 HRC. 4mm increase in shaft diameter engineered for heavy trail rock crawling.
Material: 4340 Chromoly Steel. Core Hardness: 30-34 HRC, Surface Hardness: 46-50 HRC. 4mm oversized shaft built for high-horsepower desert racing performance.
Material: 4340 Chromoly Steel. Extended length designed specifically for +6″ long-travel lift kit references. High-angle joint articulation can be specified based on application requirements.
Material: 4340 Chromoly Steel. Precision CNC Machined long travel shaft. Core 30-34HRC / Surface 46-50HRC. Engineered for wide-stance rock crawlers.
Every component inside a SYZ Machine upgraded CV axle is precision machined from premium alloy steel, featuring dual-zone heat treatment for maximum tensile strength and fatigue life.
Outer Rzeppa Joint: Features a 6-ball precision cage design used for angular movement and hub bearing engagement.
Inboard Tripod Joint: A plunging joint consisting of needle rollers, trunnion spider, and housing connected to the differential to accommodate suspension movement.
| # | Component Name | Material Grade (US / ISO) | Heat Treatment & Hardness Standard |
|---|---|---|---|
| 1 | Bell Shape Housing | 40Cr (SAE 5140) | HRC 58 – 62 Surface Induction Hardened |
| 2 | Axle Center Shaft | 40CrNiMoA (SAE 4340 Aircraft Chromoly) | Core: HRC 30-34 | Surface: HRC 46-50 |
| 3 | Inner Race | 20CrMnTi Alloy Steel | Core: HRC 22-28 | Surface: HRC 58-62 Carburized |
| 4 | Ball Cage | 20CrMnTi Alloy Steel | Core: HRC 22-28 | Surface: HRC 58-62 Carburized |
| 5 | Steel Balls | GCr15 (AISI 52100 Chrome Bearing Steel) | HRC 60 – 65 Precision Ground Class 10 |
| 6 | Tripod Joint (Inboard) | 20Cr (SAE 5120) | HRC 58 – 62 Carburized & Quenched |
| 7 | Ball Case | 20Cr (SAE 5120) | HRC 58 – 62 Carburized & Quenched |
| 8 | Needle Rollers | GCr15 (AISI 52100 Chrome Bearing Steel) | HRC 60 – 64 High Radial Load Bearing |
| 9 | Dustproof Boots | TPE / TPEE Thermoplastic Elastomer | Extreme Heat, Cold, Mud & Puncture Proof |
| 10 | Boot Clamps | 304 Stainless Steel | Low-Profile Crimped Banding |
At SYZ Machine, we provide end-to-end engineering support. Start your custom CV axle order in just 3 simple steps!
Send us your technical specs, OEM part numbers, sample axles, or custom shaft lengths (+4″, +6″, +8″ lift kit specs).
Our engineering team will develop the optimal CV joint and 4340 shaft solution, providing a direct factory quote within 24 hours.
From prototype sample testing to mass manufacturing, ocean container shipping, and after-sales support, we stand behind every axle.
SYZ Machine is a leading CV axle and suspension component supplier in China, trusted by famous global aftermarket brands for quality, safety, and performance.
We maintain long-term OEM manufacturing partnerships with leading global UTV and off-road aftermarket brands.
Flexible trial order minimums with free stock samples available for physical dimension and material checking.
Our engineering team supports custom axle development based on technical specs, OE references, drawings, or physical samples.
Complete control under one roof: hot forging, CNC turning, spline rolling, dual-heat treatment, sub-assembly, and packing.
Every completed axle undergoes 100% full inspection before packing, with project-specific checks arranged according to customer requirements.
Dedicated B2B sales engineers in Shanghai provide technical consultation and detailed factory quotes within 24 hours.
Everything you need to know about wholesale UTV CV axles, 4340 chromoly materials, and custom OEM manufacturing.
SYZ Machine upgraded axles utilize 40CrNiMoA (4340 Aircraft Chromoly) steel center shafts, up to 4mm increase in shaft diameter, and dual-zone heat treatment (Core HRC 30-34 for flexibility, Surface HRC 46-50 for torsional fatigue strength). Furthermore, CV joint housings are forged from 40Cr steel and induction hardened to HRC 58-62.
Yes. We support custom extended CV axles for Polaris Ranger (+6″) and RZR XP 1000 / 800 (+8″) long-travel suspension lift kit references. Joint structure and shaft length can be developed according to the target application and sample requirements.
We can specify TPE or TPEE thermoplastic boot options and molybdenum grease according to the application environment, target durability, and customer requirements.
We support low MOQ trial orders starting from 20 to 50 sets per model. Stock samples are available for immediate shipping. Custom OEM production lead times typically range from 3 to 4 weeks depending on order quantity.
Yes. You can provide OE part numbers, technical drawings, or physical sample axles for reverse engineering, dimensional confirmation, and custom production discussion.
Connect directly with our engineering and B2B sales team in Shanghai. We promise to respond within 24 business hours with pricing and production timelines.
