Linear motion examples in automotive and transportation show how linear guides, linear bearings, linear actuators, and slew ring bearings support vehicle manufacturing, testing, assembly, maintenance, and onboard motion systems. From automotive assembly lines and robotic welding cells to crash-test equipment, aircraft maintenance gantries, and transit seat adjustment systems, PBC Linear provides motion components engineered for demanding environments where accuracy, durability, low maintenance, and reduced downtime are critical.
Built with self-lubricating bearing materials, corrosion-resistant components, and rigid aluminum or steel construction, PBC Linear products help extend service life and keep motion systems running in applications exposed to shock, vibration, contamination, heavy loads, and repeated cycling. Whether used for positioning systems, battery module assembly, vehicle testing equipment, or transportation maintenance systems, these linear motion solutions help drive reliable performance at every stage of production and operation.
Automotive crash-test simulation system
Automotive testing equipment requires linear motion systems that can handle heavy loads, impact forces, and low-friction travel while keeping test movement controlled and repeatable. In this example, a group of engineering students needed to build a crash-testing device that could simulate a head-on collision between two opposing test cars without damaging the overall machine.
The design used two parallel linear rails and eight bearings to capture and guide the two test vehicles as they moved toward each other at 4 mph. Each car weighed approximately 700 lb, so the system needed a rugged linear guide capable of supporting high loads and absorbing impact forces while still allowing smooth rolling motion.
PBC Linear recommended Hevi-Rail® heavy-duty combined roller bearings and profile rails, specifically HVB-063 bearings with HVR-6 rails. As a rolling-element linear guide system, Hevi-Rail® provided the low friction needed for realistic motion while offering the strength and impact resistance required for controlled crash simulation. The result was a robust guided test platform that allowed the cars to collide safely and measurably within the machine.
Automotive welding slide system
Automotive assembly plants need linear motion components that can survive weld spatter, dust, water, shock loading, and temperature extremes without constant maintenance. In this example, an auto assembly plant needed a cost-effective slide system for welding and assembly machinery that could operate reliably in a harsh production environment without frequent bearing replacement or relubrication.
PBC Linear specified Simplicity® maintenance-free plain linear bearings, pillow block bearings, and nonhardened shafting for the new guide bar slide design. The aluminum pillow block shells helped reduce overall slide weight, while the Simplicity® plain linear bearings tolerated higher shock loads and temperatures than competing linear ball bearing systems. Tough molythane seals helped keep welding spatter, dust, water, and other contaminants away from the bearing surface.
The result was a smooth, quiet, and reliable slide system using thousands of low-maintenance bearings across the plant. By reducing weight, resisting contamination, and eliminating unnecessary lubrication, the Simplicity® bearing solution improved welding machinery performance while lowering maintenance demands in a demanding automotive production environment.
Robotic arm linear guide system
Automotive robotics often require linear guides and linear bearings that can support smooth robot arm motion while surviving heat, metal dust, airborne particulates, shock, and heavy contamination. In this example, a robotics manufacturer for a major automaker needed a maintenance-free slide design for robotic automation operating in harsh foundry conditions, where previous linear ball bearing systems were vulnerable to shaft corrosion, seized ball tracks, ball-bearing spalling, and unplanned downtime.
PBC Linear recommended Simplicity® self-lubricating plain linear bearings and pillow blocks for the new linear guide design. The lightweight aluminum bearing shells helped reduce the overall weight of the slide system, while tough molythane seals helped keep sand, metal dust, and other contaminants away from the bearing surface. Backed by FrelonGOLD® liner technology, the Simplicity® plain linear bearings tolerated shock loads, high temperatures, vibration, and contamination with minimal lubrication or maintenance.
The result was smooth, quiet robot arm motion and longer trouble-free bearing life compared with the previous linear ball bearing system. By reducing slide weight, resisting contamination, and avoiding catastrophic ball-bearing failure, the Simplicity® linear bearing and guide solution helped improve uptime and reduce production costs in demanding automotive robotics applications.
Transit driver seat adjustment system
Transportation equipment often requires compact linear guides that can provide smooth manual adjustment, positive locking, and long-term reliability in high-use public transit environments. In this example, Bay Area Rapid Transit, or BART, needed to update driver seat assemblies to ensure continued operation on high-traffic trains where space-saving seat adjustment was essential.
C & C Enterprises worked with PBC Linear to reverse-engineer and improve the existing seat adjustment mechanism using a custom Redi-Rail® cam roller linear guide assembly. The driver’s seat needed to slide out manually to full extension for easier entry and exit, then lock securely into position until further adjustment was required.
PBC Linear engineers improved the original bulky dual-carriage slider by developing a one-piece steel slider component in place of the previous dual aluminum sliders. The updated Redi-Rail® solution enhanced rigidity, improved linear guidance performance, reduced part count by eliminating a bracket connector, and made the assembly easier to install. After installation, C & C Enterprises reported easier ergonomic adjustment and a more efficient seat assembly compared with the original design.
Aircraft maintenance gantry system
Aircraft maintenance equipment often requires smooth manual linear motion to move heavy components safely between work areas. In this example, an aircraft maintenance facility in Michigan needed an improved gantry system to remove auxiliary power units, or APUs, from aircraft and transfer them to a maintenance cart for repair.
The existing gantry did not provide easy traverse from the aircraft to the cart, so the design team evaluated linear rail options that could support the load while remaining practical, cost-effective, and easy to move by hand. PBC Linear recommended Redi-Rail® linear guides because their precision cam-roller design provides smooth rolling motion under load, making manual movement easier than sliding-contact alternatives.
The final design used Redi-Rail® guides fastened in parallel to the gantry framework, with sliders attached to the APU holding fixture. Redi-Rail® was selected for its lightweight construction, availability in long lengths, adjustable preload, and roller-based guidance. The system allowed technicians to remove the APU from the aft section of the aircraft, move it along the rails to the maintenance cart, and reverse the process after service.
