In the cam drive systems of high-speed automatic packaging machines, stud type track roller bearings follow every contour of the cam profile with extreme precision, driving the precise movements of cutters, sealers and pick-and-place arms. On the linear guides of automated production lines, stud type track roller bearings carry the full weight of sliding worktables, maintaining smooth rolling during high-speed reciprocating motion. On the tracks of material conveying systems, stud type track roller bearings operate continuously under heavy loads and dusty environments, supporting hundreds of kilograms of conveying loads. In the joints and wrists of industrial robots, stud type track roller bearings withstand complex loads and frequent oscillations with compact structures. In every cam follower and guide system requiring high load capacity, impact resistance and compact structure, stud type track roller bearings are the core precision components achieving precise motion transmission and reliable load support.

 

Stud type track roller bearings (also known as cam follower bearings or stud type track roller bearings) are a special bearing type that integrates rolling bearings with mounting studs. Their core structure consists of a thick-walled outer ring, needle roller and cage assemblies, and a stud (core) with mounting threads. The thick-walled outer ring can withstand high radial loads and impact loads while also accommodating axial forces from slight misalignment and tilting motion. Needle roller and cage assemblies (or full-complement needle roller configurations) transmit loads between the outer ring and stud, achieving low-friction rolling contact. The stud end features mounting threads and an internal hexagon socket for direct installation on equipment frames using a standard wrench, eliminating the need for additional bearing housings.

 

Stud type track roller bearings are available with cylindrical outer rings and spherical outer rings (crowned)——cylindrical outer rings suit flat guide rails and cam surfaces; spherical outer rings (crowned) compensate for slight angular misalignment between guide rails and cam surfaces, reducing edge stress concentration. Based on rolling element configuration, they are available in caged and full-complement needle roller types——caged types suit high-speed operation with low friction and low temperature rise; full-complement types suit heavy-load and impact applications with maximized roller quantity and greater load capacity. Based on stud configuration, they are available in standard and eccentric types——standard studs have coaxial stud and stud head for conventional installation; eccentric types allow installation position adjustment by rotating the eccentric sleeve, suitable for applications requiring precise guide rail clearance adjustment. Based on lubrication method, they are available in sealed and open types——sealed types (PP suffix) feature plastic washers and molded sealing lips on both sides, forming triple seals to effectively block dust and moisture ingress.

 

Stud type track roller bearings are widely used in automation equipment, packaging machinery, conveying systems, machine tools, industrial robots, electronic component assembly equipment, OA equipment, printing machinery, textile machinery, food machinery and various industrial equipment requiring cam drive, linear guidance and track operation.

 

NMT Stud Type Track Roller Bearing Technology Solutions

 

Japan NMT stud type track roller bearings are specialized product series developed specifically for the stringent requirements of cam follower and guide systems——high load capacity, impact resistance, long life and high reliability.

 

Thick-Walled Outer Ring High-Capacity Design——Stud type track roller bearing load capacity depends on outer ring wall thickness, needle roller quantity and diameter. NMT stud type track roller bearings feature specially thickened high-quality bearing steel outer rings, maintaining extremely low deformation under high radial loads and impact loads. Outer ring outer surfaces undergo precision grinding and superfinishing with surface roughness controlled to extremely low levels, achieving smooth low-friction rolling on guide rails and cam surfaces. Outer rings are available in cylindrical and spherical (crowned) profiles——cylindrical outer rings suit flat guide rails and standard cam surfaces; spherical outer rings (R type) automatically compensate for slight angular misalignment between guide rails and cam surfaces, effectively eliminating edge stress concentration and extending bearing and guide rail service life.

 

High-Capacity Needle Roller System Design——Stud type track roller bearing needle roller configuration determines load capacity and operational characteristics. NMT stud type track roller bearings offer caged and full-complement needle roller configurations. Caged types utilize precision needle roller and cage assemblies with precision-graded rollers with diameter deviation controlled to minimal ranges, ensuring uniform load distribution, suitable for high-speed operation and low-friction requirements. Full-complement types (V suffix) feature cage-free full-complement needle roller structures with maximized roller quantity, significantly enhanced radial load capacity and better impact tolerance, particularly suitable for heavy-load and impact applications. Needle rollers undergo precision crowning to eliminate edge stress concentration, ensuring uniform load distribution along the full roller length and significantly extending bearing life under heavy loads.

 

High-Strength Stud and Eccentric Sleeve Design——The stud of stud type track roller bearings is the key component connecting the bearing to equipment frames. NMT stud type track roller bearing studs utilize high-strength alloy steel with precision heat treatment and surface treatment, with excellent thread strength and fatigue resistance. Stud heads feature internal hexagon sockets and mounting threads for direct installation using standard wrenches without additional bearing housings, providing quick and convenient installation. Studs feature internal lubrication passages from the stud head or end, delivering grease through radial oil holes to needle roller-to-raceway contact areas for adequate lubrication. NMT also offers stud type track roller bearings with eccentric sleeves (E suffix)——eccentric sleeves allow bearing mounting centers to be offset relative to stud centers, with installation position fine-tuning achieved by rotating the eccentric sleeve, facilitating precise guide rail clearance adjustment and cam follower preload.

 

Triple Seal Protection System——Stud type track roller bearings typically operate in dusty, splashing and contaminated environments, with seal system reliability directly determining bearing life. NMT stud type track roller bearings offer high-performance sealing solutions (PP suffix), featuring plastic washers and molded sealing lips on both sides forming triple seals——the first sealing lip blocks large dust particles and splashes, the second sealing lip blocks fine dust and moisture, and the third sealing lip prevents grease leakage. Seal materials utilize wear-resistant, aging-resistant, temperature-resistant specialty rubber formulations, maintaining long-term elasticity and sealing performance in harsh environments. Sealing systems maintain sealing effectiveness while keeping friction torque within reasonable limits, not affecting high-speed bearing performance.

 

Precision Mounting and Axial Guidance Design——Stud type track roller bearings require precise axial positioning and guidance after installation. NMT stud type track roller bearings feature contact flanges and washers between the outer ring and stud, providing precise axial guidance for the outer ring. The outer ring rotates freely on the stud while achieving axial positioning through contact flange and washer restrictions, preventing axial movement during operation. Bearing axial clearance is precisely set to maintain free outer ring rotation while eliminating excessive axial clearance, ensuring high-precision motion transmission in cam follower systems. Stud end mounting threads are precision-rolled with thread accuracy and surface quality strictly controlled for reliable locking and precise preload control during installation.

 

Long-Life Lubrication and Maintenance Design——Stud type track roller bearing lubrication directly relates to bearing service life and maintenance intervals. NMT stud type track roller bearings are factory-pre-filled with high-quality specialized grease formulated with synthetic base oils and extreme-pressure anti-wear, rust-preventive additives, forming stable lubricating films under heavy-load and impact conditions. Internal lubrication passages and radial oil holes in studs ensure adequate grease delivery to needle roller-to-raceway contact areas. For applications requiring periodic supplementary lubrication, NMT offers stud type track roller bearings with lubrication nipples for easy grease replenishment using standard grease guns. The synergistic design of sealing systems and lubrication systems ensures long-term maintenance-free operation in harsh environments.

 

Diverse Product Range——NMT stud type track roller bearings offer diverse product ranges for different application scenarios and operating conditions. KR series——Standard stud type track roller bearings with cages, suitable for high-speed operation and general load conditions. KRE series——Stud type track roller bearings with eccentric sleeves for installation position fine-tuning. NUKR series——Stud type double-row cylindrical roller track roller bearings with full-complement roller structures for extremely high load capacity, suitable for heavy-load and severe impact conditions. All series are available with cylindrical and spherical outer ring profiles, caged and full-complement needle roller configurations, standard and eccentric stud configurations, and open and sealed protection options. NMT provides precise bearing selection and configuration recommendations based on specific operating parameters and installation conditions.

 

Why Choose NMT Stud Type Track Roller Bearings?

 

Compared to conventional bearings and industry-standard stud type track roller bearings, NMT stud type track roller bearings offer distinct advantages:

 

Specially thickened high-quality bearing steel outer rings for high radial load and impact resistance

 

Cylindrical/spherical (crowned) dual outer ring profiles for flat guides and angular compensation

 

Caged/full-complement dual needle roller configurations for high-speed and heavy-load conditions

 

Precision-graded and crowned needle rollers for uniform load distribution

 

High-strength alloy steel studs with precision heat treatment for excellent thread strength

 

Internal hexagon socket + mounting threads for direct installation without bearing housings

 

Internal lubrication passages and radial oil holes for adequate roller contact lubrication

 

Eccentric sleeve (E type) options for installation position fine-tuning and clearance adjustment

 

Triple seal protection (PP suffix) for dust, moisture and grease leakage prevention

 

Contact flange and washer axial guidance for eliminating axial movement

 

Factory-pre-filled high-quality synthetic grease for long-term maintenance-free operation

 

Lubrication nipple options for convenient supplementary lubrication

 

KR/KRE/NUKR multiple series for different operating conditions and load requirements

 

Passed load, impact, seal and life testing

 

These performance advantages establish NMT stud type track roller bearings as the core precision components for automation equipment, packaging machinery, conveying systems, machine tools, industrial robots and various cam follower and guide systems.

 

Application Scenarios

 

Automatic packaging machine cam drive bearings

 

Automated production line linear guide bearings

 

Material conveying system track bearings

 

Industrial robot joints and wrist bearings

 

Machine tool cam and indexing mechanism bearings

 

Electronic component assembly equipment bearings

 

Printing machinery and textile machinery guide bearings

 

Food machinery and packaging equipment cam follower bearings

 

Precision Manufacturing

 

Produced strictly according to ISO precision standards and stud type track roller bearing manufacturing specifications, with zero-defect quality execution, NMT stud type track roller bearings utilize high-purity bearing steel and alloy steel, processed through vacuum degassing treatment, precision heat treatment, thick-walled outer ring precision grinding and superfinishing, precision needle roller crowning and screening/grouping, cage precision forming, stud precision machining and heat treatment, eccentric sleeve precision machining, seal precision assembly, specialized grease precision filling, rotational accuracy inspection, clearance precision control, load testing, impact testing and seal performance testing. Every product is processed through fully automatic machining and superfinishing in temperature-controlled clean workshops, with critical dimensional tolerances strictly controlled—ensuring high load capacity, impact resistance and long-life reliability.

 

Product Range

 

Standard stud type track roller bearings (KR series)

 

Eccentric sleeve stud type track roller bearings (KRE series)

 

Stud type double-row cylindrical roller track roller bearings (NUKR series)

 

Spherical outer ring stud type track roller bearings (KR...R series)

 

Full-complement needle roller stud type track roller bearings (KR...V series)

 

Sealed stud type track roller bearings (KR...PP series)

 

Custom non-standard stud type track roller bearings

 

Global Industrial Service

 

Japan NMT supplies high-quality stud type track roller bearings to global automation equipment manufacturers, packaging machinery companies, conveying system suppliers and industrial users. With high-capacity impact-resistant precision engineering and long-term stable reliable performance, NMT continuously empowers precise motion transmission and reliable load support for global cam follower and guide systems.