Cam transmission mechanisms, linear guide modules, packaging machinery, handling tooling and machine tool limit devices on automatic production lines widely adopt roller mechanisms for track guidance and reciprocating driving. Traditional split roller assemblies require independent shafts, bushings and locking components. The large number of parts leads to complicated assembly procedures. Fasteners tend to loosen and rollers suffer eccentric offset after long-term reciprocating operation. Ordinary needle roller bearings cannot be directly installed on the side of guide rails. Additional mounting brackets will increase overall machine size and hinder compact layout design. Rollers bear continuous radial impact loads during equipment operation, and slight lateral forces exist in partial working conditions. Insufficient bearing load capacity easily causes needle wear and outer ring cracking, directly resulting in production line shutdown. Meanwhile, high-speed circulating assembly lines demand strong part interchangeability and convenient maintenance. Integrated roller bearings that can be fixed directly by bolts are required to simplify on-site disassembly and maintenance. NMT Stud Type Track Rollers integrate stud shaft, outer rings, needles and cages into one unit. They can be installed directly by screwing, roll continuously along cam and guide rail surfaces, and feature outstanding impact resistance and load capacity. They are widely used in cam transmission, linear guidance and limited conveying equipment.

As the continuous operating speed of automatic equipment rises, cam mechanisms and linear guide modules operate more frequently. Roller components need to withstand high-frequency alternating loads and intermittent impact loads. Split assembled roller structures own multiple connecting points. Threads are prone to loosening under long-term vibration, triggering roller jumping and track deviation, which seriously reduces equipment positioning accuracy. Conventional needle roller bearings lack integrated mounting bases. Complex supporting structures are necessary, greatly increasing machining cost and design difficulty. Many automatic packaging and sorting equipment have narrow internal space with insufficient room for complicated supports. Integrated roller bearings are urgently needed to save installation space. In addition, routine production line maintenance requires rapid part replacement. Replacing split rollers demands dismantling multiple components, leading to long downtime and lower production efficiency. Equipment manufacturers are in urgent need of standard integrated roller bearings combining installation, load-bearing and rolling functions. Integrating threaded studs, needle rolling units and thickened outer rings, NMT Stud Type Track Rollers achieve heavy load capacity via needle line contact structure. Direct threaded mounting eliminates extra supports, simplifies mechanical structures and adapts to high-speed reciprocating cam and linear guide working conditions.

Manufactured with integrated stud shaft structure, NMT Stud Type Track Rollers go through quenching and tempering strengthening on studs. Threads comply with unified precision standards and can be fixed rapidly by screwing into mounting plates. Thickened outer rings are precisely quenched and ground with curved outer surfaces, which fit cams and linear guide rails for smooth rolling, distribute contact stress and lower pitting risk. Multiple high-precision needles are assembled inside. The line contact bearing structure delivers remarkable radial load capacity to sustain constant loads and short-time impact loads. A variety of structural types are available, including closed dust-proof models and greasable models with lubrication nipples, suitable for dusty environments and long-term continuous operation. Some specifications adopt eccentric outer rings to adjust clearance between rollers and guide rails conveniently for precise calibration during assembly. The integrated design eliminates scattered accessories such as sleeves and lock nuts and greatly shortens component lists. Widely applied in cam driving mechanisms, automatic sorting guide modules, sealing and conveying devices of packaging machinery, machine tool limit rollers, three-dimensional warehouse handling equipment and reciprocating transmission assemblies of printing machines.

Stud shafts are made of high-strength alloy steel and heat-treated to improve tensile and torsional strength. Threads are precisely processed to ensure stable locking and prevent thread slipping. Thickened outer rings receive surface quenching treatment with sufficient hardness and excellent wear resistance. High-precision needles are sorted by dimension for even load distribution and avoid excessive local abrasion. Cages separate needles accurately to prevent mutual extrusion and friction during operation. Sealed versions adopt wear-resistant rubber seals to block dust and debris from entering bearings. All finished products pass tests on thread precision, outer ring diameter and rotation flexibility. Units with unsmooth rotation and out-of-tolerance dimensions are eliminated to guarantee consistent assembly precision and operation stability among batches.

The complete specification range covers standard type, eccentric adjustable type and nipple lubrication type, supplying integrated roller load-bearing solutions for cam transmission and linear guide applications.

Core Product Advantages

Integrated stud shaft design, directly fixed by thread without extra supports and bushes, simplifying mechanical structures and shortening assembly time;

Thickened curved outer rings achieve uniform stress on contact surfaces with guide rails and cams, featuring high extrusion resistance and wear resistance to reduce long-term rolling fatigue damage;

Internal needle line contact structure with excellent load capacity, stably bearing continuous radial loads and intermittent impact loads;

Diverse structures including standard type, eccentric adjustable type and greasable type. Eccentric models support clearance adjustment for convenient equipment precision calibration;

Optional sealed dust-proof structure prevents dust and processing debris from invading bearings and extends service life under harsh conditions;

Built-in threaded mounting structure for easy disassembly and rapid part replacement during production maintenance, shortening equipment downtime;

Standard universal specifications, directly interchangeable with mainstream stud type track rollers on market. No modification on mounting holes needed during equipment upgrading;

High-strength alloy steel studs resist vibration and deformation, suitable for high-frequency reciprocating continuous operation of automatic equipment.

Typical Application Scenarios

Cam drive transmission mechanisms of all kinds of automatic equipment; linear guide rollers for sorting and conveying assembly lines; reciprocating modules for box sealing and feeding of packaging machinery; limit and feed guide devices of small machine tools; light-duty handling components of automated warehouses; reciprocating rollers of printing and textile machinery; limit supporting rollers of tooling fixtures.

Quality Assurance

NMT Stud Type Track Rollers adopt special high-strength alloy steel raw materials. Hardness and metallographic sampling inspection are conducted for every batch to strictly control raw material quality. Stud shafts go through forging, heat treatment and precision thread machining to enhance structural strength and thread matching accuracy. Thickened outer rings are quenched and precisely externally ground to guarantee roundness and surface wear resistance. Needles receive mirror grinding and dimensional sorting to ensure stable rotation and reduce vibration and noise. All burrs are removed from stamped cages for unobstructed needle movement. Seals are made of aging-resistant rubber to resist dust and light oil contamination. Every finished bearing passes dimensional inspection and rotation test. Samples are regularly selected for fatigue load and vibration durability tests. Defective workpieces are sorted separately. Every stud track roller ensures reliable locking, smooth rotation and qualified wear resistance and load capacity, supplying trustworthy rolling supporting components for automatic cam and guide equipment.

Product Range

Standard stud type track rollers, eccentric adjustable stud track rollers, greasable track rollers with lubrication nipples, sealed dust-proof track rollers. Model selection based on load magnitude, dust level of operating environment, clearance adjustment demand and lubrication maintenance cycle.

Brand Strength

NMT devotes to R&D and manufacturing of cam follower track rollers. Targeting high-frequency reciprocating operation conditions of automatic cam mechanisms and linear guide equipment, NMT continuously optimizes stud heat treatment technology, outer ring contour precision and internal needle matching scheme. The bearings effectively solve common failures such as roller loosening, premature outer ring wear and insufficient load capacity. NMT helps automatic equipment manufacturers simplify structural design, reduce assembly difficulty and cut maintenance downtime.