Linear motion is essential to factory automation and modern manufacturing, where machines must move parts, tools, fixtures, sensors, and workholding systems with speed, accuracy, and reliability. From CNC machining and robotic handling to welding equipment, conveyor systems, grippers, and heavy-load transfer, PBC Linear provides linear bearings, linear guides, and linear actuators engineered for demanding industrial environments. These solutions help manufacturers improve precision, reduce downtime, support heavier loads, and keep automated production lines running smoothly in applications exposed to contamination, vibration, heat, and continuous duty cycles.
Robotic de-stacking conveyor system
Factory automation systems often depend on linear actuators to move heavy products quickly, accurately, and repeatedly through production-line equipment. In this example, a bottle cleanser packaging and sorting conveyor used MT Series belt-driven linear actuators in a robotic de-stacker to move 272 lb pallets of empty bottle boxes into position before lowering them onto a transfer conveyor.
During early testing, out-of-position pallets created misalignment that overloaded the original linear actuators beyond their moment load rating. The actuators were responsible for both horizontal positioning and vertical lift motion, so excessive side loading on the vertically mounted units created damage, shutdown risk, and potential safety concerns.
PBC Linear resolved the issue by using the same MT linear actuator model with dual carriages to absorb higher moment loads, along with a custom spring-loaded hinged mounting plate that allowed the de-stacker connection to pivot during misalignment. The MT actuators provided steel-reinforced timing belt drive performance, ball-guided rail support, smooth velocity control, and T-slots for flexible mounting. The upgraded dual-carriage linear actuators and custom pivoting mount helped prevent breakage, protect the machine from pallet misalignment, and keep the automated de-stacking system running reliably.
Manual welding nozzle adjustment system
Factory welding equipment often operates in dirty, high-contamination environments where traditional rolling-element linear guides can struggle with debris, shock, vibration, weld spatter, and wear. In this example, an OEM building welding equipment needed a more durable manual adjustment system for two vertically oriented welding nozzles. The slides had to support the projected workload, allow independent nozzle adjustment, provide 4–5 in of stroke, and remain self-supporting when the operator was not holding the device.
PBC Linear recommended a D125 Uni-Guide linear slide with an extended carriage using Gliding Surface Technology™. Unlike rolling-element linear guides, the Uni-Guide plain bearing system uses self-lubricating FrelonGOLD® bearing liners to tolerate contamination, shock, vibration, and wear while providing smooth manual motion. Because the carriage slides on a broad FrelonGOLD® liner surface rather than exposed rolling elements, weld spatter and shop debris are less likely to damage the motion system and can be wiped away more easily during routine cleaning. The system also included self-locking vises to hold position when the operator released the adjustment mechanism.
The resulting manual linear guide system gave the welding equipment OEM a rugged, easy-to-install solution for harsh shop-floor conditions. The customer reported that the Uni-Guides worked as intended, with smooth operation, simple installation, and reliable delivery.
Foundry parallel gripper system
Foundry automation equipment must operate through sand, dirt, weld spatter, heat, and heavy loading without frequent bearing failure. In this example, an Indiana foundry producing cast iron and grey ductile castings needed to retrofit a parallel gripper system where bronze bearings were not tolerating the high temperature, contamination, and 1,800 lb static load per bearing.
PBC Linear recommended double sized DDS-B-32DJ die-set steel mount straight-bore Simplicity® plain linear bearings with a special lubrication system. The plain bearing design provided stronger resistance to contamination and harsh foundry conditions while supporting a 2.5 in stroke at 120 in/min. Because the Simplicity® plain linear bearings use a self-lubricating liner instead of exposed rolling elements, sand, dirt, weld spatter, casting dust, and other foundry debris can be tolerated more effectively and wiped away more easily during maintenance.
The retrofit improved reliability enough that the customer began considering Simplicity® plain linear bearings for other linear motion applications throughout the facility.
Application Story GST Uni Guide Linear Slide System Welding Equipment