Splined Collar - 1 3/4" - 48 Spline 9042
SKU 9042
Category: High-Strength Splined Sway Bar Collars (Off-Road Fabrication Hardware)
Engineered for hardcore trophy trucks, ultra4 rock racers, pre-runners, and custom off-road race fabrications, this 2.5" outer diameter splined collar provides the critical mechanical link between your sway bar torsion tube and custom suspension arms. In extreme off-road environments, standard keyed or pinned sway bar configurations will quickly deform, shear, or introduce dangerous slop into the anti-roll system. This premium chassis component solves that vulnerability via an internal, high-density spline layout. It is specifically engineered to handle the massive, cyclical torsional loads generated as your vehicle navigates deep whoops, hard cornering zones, and violent axle articulation, ensuring your suspension tracking remains crisp and predictable.
Performance & Fitment
Application: Ideal for custom chassis fabrication, high-travel off-road sway bar assemblies, and building bespoke, heavy-duty anti-roll bar arms.
Internal Spline Profile: 1 ¾" – 48-Spline (Industry-standard heavy-duty racing spline specification for tight mechanical indexing and maximum surface area engagement).
Outer Diameter (OD): 2 ½" (Provides thick, structural wall cross-sections capable of resisting distortion during welding and heavy operational abuse).
Overall Length: 1.25" (Compact profile designed to provide deep spline engagement while maintaining clearance for chassis rails and tight suspension packaging).
Premium Construction
Material: 10XX Series Structural Steel. Specifically selected for its exceptional carbon balance, providing a highly desirable combination of raw tensile yield strength and excellent weldability when joining to custom chromoly or mild steel sway bar arms.
Manufacturing Process: Precision Machined & Broached. CNC-machined on all outer surfaces and internal indexing marks, then interior broached to exacting tolerances. This guarantees a smooth, ultra-precise slip-fit onto matching 1 ¾" 48-spline bars without binding or microscopic play.
Structural Safety: Optimized to withstand severe torsional twisting forces without wall stretching or internal spine deformation under peak suspension loads.
🛠️ Custom Off-Road Sway Bar Welding & Engineering Tech Notes
Integrating splined collars into a custom anti-roll bar system requires precise fabrication techniques to avoid altering the metallurgy or ruining the fitment:
🧼 Critical Pre-Weld Preparation: Before welding this 10XX series steel collar to your custom sway bar arms, all manufacturing oils, storage coatings, and surface scales must be completely removed. Thoroughly scrub the inner splines and outer weld bevels with clean brake cleaner and a wire brush. Any oil trapped in the splines or on the weld face will introduce porosity and hydrogen contamination into the weld puddle, severely weakening the joint and risking a catastrophic failure under suspension load.
🔥 Manage Heat Input & Prevent Spline Distortion: When TIG or MIG welding your sway bar arms to this collar, excessive heat can warp the round body, causing the internal splines to shrink or pull out of round. To minimize thermal distortion, clamp or slide the collar onto a scrap piece of 1 ¾" 48-spline bar stock during the welding process to act as a heat sink and dimensional mandrel. Use a staggered welding pattern—alternating sides and allowing the component to cool slightly between passes—rather than laying down one continuous, high-heat bead.
❄️ Always Allow Slow, Natural Cooling: Never quench the collar in water or oil after welding to cool it down quickly. Rapid cooling of hot structural steel alters its crystalline molecular structure, making the metal incredibly brittle around the heat-affected zone (HAZ). This creates a high-stress fracture point right where the arm meets the collar. Allow the completed assembly to cool slowly and naturally in still air at room temperature.
📐 Aligning Timing and Indexing Marks: When fabricating a dual-arm sway bar assembly, the splined collars on both the left and right arms must be welded in exact geometric alignment (properly "timed" with each other). If the collars are welded out of alignment by even a single spline tooth relative to the arms, the sway bar will be pre-loaded when installed, causing the vehicle to sit crookedly and track poorly. Double-check your jigging and spline indexing before laying down your final weld tacks.
🛢️ Post-Fabrication Spline Lubrication: While the outer body will be painted or powder-coated after fabrication, the internal 1 ¾" 48-spline teeth must remain bare metal to slip onto the sway bar. To prevent rust pitting and unwanted metal-on-metal galling caused by fine trail silt working its way into the assembly, apply a thin layer of high-pressure, water-resistant marine grease or anti-seize compound to the internal splines prior to final installation.
What’s Included
(1) Sway bar splined collar
Warranty
Backed by a 1-year warranty for peace of mind.
Stock Information
Available for backorder.