Splined Collar - 3/4"-48 Spline - 1.125" Diameter - 1.25" Length
SKU 9046
Category: High-Strength Splined Sway Bar Collars (Off-Road Fabrication Hardware)
Engineered for lightweight off-road race vehicles, custom UTV chassis, mini-buggies, and specialized performance car anti-roll assemblies, this 1.125" outer diameter splined collar delivers a rock-solid mechanical connection for your custom sway bar system. Standard pinned or keyed sway bar joints are highly prone to wallowing out and introducing play when subjected to continuous suspension cycling. This precision fabricator component solves that vulnerability by utilizing an internal, fine-tooth spline layout. It is specifically designed to distribute torsional twisting forces evenly across the engagement surface, keeping your suspension tracking predictable, crisp, and completely free of slop.
Performance & Fitment
Application: Ideal for custom chassis fabrication, UTV sway bar links, lightweight off-road anti-roll setups, and bespoke suspension arm engineering.
Internal Spline Profile: ¾" – 48-Spline (Fine-tooth racing spline specification chosen for its precise mechanical indexing and excellent torque distribution).
Outer Diameter (OD): 1.125" (Ultra-compact, space-saving outer profile optimized for tight suspension packaging and clean clearance envelopes).
Overall Length: 1.25" (Provides deep, balanced spline engagement along the matching ¾" sway bar shaft).
Premium Construction
Material: 10XX Series Structural Steel. Selected for its exceptional metallurgical balance, offering high tensile strength paired with excellent weldability when joining the collar to chromoly or mild steel fabrication arms.
Manufacturing Process: Precision Machined & Broached. CNC-machined on all critical outer dimensions and interior-broached to exact engineering tolerances. This ensures a flawless slip-fit onto matching ¾" 48-spline bars, eliminating structural play without binding.
Design Intent: Engineered to maintain absolute dimensional stability and resist splitting or wall distortion under heavy dynamic 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 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 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.