Choosing between a stud type cam follower and a yoke type track roller is an important decision when designing conveyors, automation equipment, packaging machinery, material handling systems, and other industrial machines.

At first glance, both products perform a similar function: they provide rolling contact between a rotating component and a cam, track, guide rail, or machine surface.

However, the mounting configuration is fundamentally different.

A stud type cam follower has an integrated stud, while a yoke type track roller is mounted on a separate shaft or pin.

This difference affects installation, load distribution, mounting rigidity, available space, maintenance, and the way the component should be selected.

For OEM engineers and industrial buyers, the right question is not simply:

"Which cam follower is better?"

The better question is:

"Which cam follower configuration is better for my machine, load, mounting structure, and operating conditions?"

This guide compares stud type cam followers and yoke type track rollers, including commonly used CF, KR, NATR, and NUTR series configurations, and explains how to select the right solution for industrial applications.

Stud Type Cam Followers vs Yoke Type Track Rollers

The basic structural difference is straightforward.

A stud type cam follower combines the rolling bearing and mounting stud into one component.

A yoke type track roller uses a separate shaft, pin, or axle to support the roller.

Neither configuration is universally superior.

The correct selection depends on the complete mechanical system.

What Is a Stud Type Cam Follower?

A stud type cam follower is a track roller with an integrated mounting stud.

Instead of installing a separate shaft through the bearing, the stud is attached directly to the machine structure.

This creates a compact assembly with fewer components.

Stud type cam followers are widely used in:

• Automation equipment

• Packaging machinery

• Conveyors

• Assembly machines

• Indexing mechanisms

• Printing machinery

• Textile equipment

• Material handling systems

• General industrial machinery

The integrated stud makes this configuration particularly attractive when installation simplicity and compact machine design are important.

What Is a Yoke Type Track Roller?

A yoke type track roller does not have an integrated mounting stud.

Instead, the roller is installed using a separate shaft or pin.

The machine designer therefore has more freedom to determine:

• Shaft diameter

• Shaft length

• Shaft material

• Heat treatment

• Shoulder configuration

• Axial retention

• Mounting arrangement

This makes yoke type track rollers especially useful in heavy-duty equipment where the shaft and supporting structure must be designed together with the roller.

Typical applications include:

• Heavy-duty conveyors

• Material handling systems

• Steel processing equipment

• Mining machinery

• Agricultural machinery

• Large industrial equipment

• Automated transfer systems

CF vs KR vs NATR vs NUTR: Understanding the Main Configurations

For engineers researching cam followers and track rollers, product series are often more useful than simply knowing whether a bearing is "stud type" or "yoke type."

Four important series families to understand are:

• CF Series

• KR Series

• NATR Series

• NUTR Series

These series are commonly encountered when specifying or replacing industrial cam followers and track rollers.

The exact load capacity and dimensions vary by individual model and manufacturer, so engineers should always verify the technical catalog before making a final selection.

CF Series Cam Followers

The CF series is a familiar stud type cam follower configuration used in industrial machinery.

Typical applications include:

• Automated machinery

• Conveyor guide systems

• Packaging machines

• Assembly equipment

• Cam-driven mechanisms

• Material handling equipment

Representative sizes such as CF16, CF20, CF24, and CF30 can be considered when developing a size range for different industrial applications.

However, the model number alone should not be used to determine load capacity.

When selecting a CF cam follower, check:

• Outside diameter

• Stud diameter

• Roller width

• Bearing load rating

• Stud strength

• Operating speed

• Track condition

• Lubrication

• Sealing requirements

When Is a CF Cam Follower a Good Choice?

A CF configuration can be particularly attractive when:

• The machine needs compact mounting

• Installation must be simple

• The load is primarily radial

• The mounting structure is standardized

• Easy replacement is important

• Multiple rollers are installed in the same machine

For OEM equipment, reducing the number of separate components can simplify both assembly and maintenance.

KR Series Cam Followers

The KR series is another important stud type cam follower configuration.

Typical models encountered in industrial applications include:

• KR19

• KR22

• KR26

• KR30

• KR35

• KR40

• KR47

• KR52

Larger models can be considered when the application requires a larger roller and greater load capability, subject to the manufacturer's actual specifications.

KR series cam followers are commonly associated with:

• Automation systems

• Cam mechanisms

• Conveyors

• Machine tools

• Material handling equipment

• Industrial machinery

The main advantage of a KR-style stud type design is the combination of a compact mounting arrangement with a rolling element bearing structure designed for track applications.

KR Cam Follower Selection: KR19, KR22, KR26, KR30, KR35 and KR40

When comparing different KR sizes, engineers should not simply select the largest model that fits.

Instead, consider the complete load and geometry.

For example:

KR19 → KR22 → KR26 → KR30 → KR35 → KR40

Moving toward larger sizes generally provides a larger overall bearing envelope, but the final selection must be verified against the actual manufacturer's load ratings and dimensions.

A practical selection sequence is:

Load → roller diameter → mounting space → stud strength → speed → track condition

This is more reliable than choosing a model based solely on outside diameter.

NATR Series Yoke Type Track Rollers

The NATR series represents a yoke type track roller configuration that uses a separate mounting shaft.

Representative sizes may include:

• NATR15

• NATR20

• NATR25

• NATR30

These track rollers can be used in:

• Conveyor systems

• Guide mechanisms

• Material handling equipment

• Automated machinery

• Industrial track systems

The major advantage is mounting flexibility.

Because the shaft is separate from the bearing, the machine designer can optimize the supporting shaft according to the application.

This can be particularly valuable when the mounting structure is non-standard.

NUTR Series Heavy-Duty Yoke Type Track Rollers

The NUTR series is commonly considered when the application requires a more robust track roller configuration.

Representative sizes include:

• NUTR20

• NUTR25

• NUTR30

• NUTR35

• NUTR40

Typical applications include:

• Heavy-duty conveyors

• Material handling

• Industrial transfer equipment

• Steel processing machinery

• Large automated equipment

For heavy-duty applications, the bearing should be evaluated together with the supporting shaft and machine frame.

A larger bearing does not automatically solve a weak mounting structure.

CF vs KR: Which Stud Type Cam Follower Should You Choose?

CF and KR configurations can both be considered for stud type applications, but the final choice should be based on the exact dimensions and performance requirements.

Consider CF when:

• You need a standard stud type configuration

• Compact mounting is important

• The application is relatively straightforward

• Automation or conveyor applications are involved

• Installation simplicity is a priority

Consider KR when:

• A compact needle roller cam follower configuration is required

• Higher load capability is needed within the available envelope

• The application involves cam mechanisms or industrial automation

• A widely recognized standard size is required

The actual bearing capacity, stud dimensions, and interchangeability must always be confirmed from the relevant manufacturer's technical data.

NATR vs NUTR: Which Yoke Type Track Roller Should You Choose?

The choice between NATR and NUTR should be based on the required bearing capacity, dimensions, operating conditions, and mounting structure.

Consider NATR when:

• The application uses a separate shaft

• Conveyor or guide applications are involved

• Moderate to substantial loads need to be supported

• Flexible mounting is important

• The machine structure requires a customized shaft

Consider NUTR when:

• The application involves heavier loads

• Heavy-duty conveyors are involved

• Material handling equipment is used

• Higher structural rigidity is required

• The shaft and track roller need to be designed as a complete assembly

Again, the individual model specifications are more important than the series name alone.

Stud Type vs Yoke Type for Conveyor Systems

Conveyors are one of the most common applications for track rollers and cam followers.

However, not all conveyors have the same requirements.

A light-duty conveyor carrying small products may prioritize:

• Compact size

• Low friction

• Easy installation

• Low maintenance

A heavy-duty conveyor transporting steel, pallets, containers, or bulk material may prioritize:

• High load capacity

• Impact resistance

• Shaft strength

• Mounting rigidity

• Track durability

For compact conveyor equipment

A stud type cam follower such as a CF or KR configuration can be an efficient solution when the mounting structure is suitable.

For heavy conveyor equipment

A yoke type track roller such as NATR or NUTR may provide greater freedom to design the supporting shaft and mounting structure.

The application, rather than the product name, should determine the final selection.

Stud Type Cam Followers for Automation Equipment

Automation equipment often requires hundreds or even thousands of rolling components throughout its operating life.

For these applications, design engineers frequently value:

• Compact dimensions

• Easy assembly

• Standardized mounting

• Predictable maintenance

• Easy replacement

Stud type cam followers are therefore widely suited to:

• Assembly machines

• Indexing systems

• Transfer machines

• Packaging equipment

• Robotic mechanisms

• Inspection equipment

• Automated material handling

For example, a machine with multiple guide tracks may use many cam followers simultaneously.

In such a system, simplifying the mounting structure can reduce assembly time and maintenance complexity.

Yoke Type Track Rollers for Heavy Industrial Machinery

Heavy industrial machinery presents a different engineering challenge.

The load may be combined with:

• Shock

• Vibration

• Frequent starts and stops

• Reversing motion

• Contamination

• High temperature

• Long operating cycles

In these conditions, the mounting shaft becomes an important part of the design.

A yoke type configuration allows the engineer to select and design the shaft separately.

This can provide advantages for:

• Steel mills

• Mining machinery

• Heavy conveyors

• Industrial transfer equipment

• Large material handling systems

How Load Direction Changes Cam Follower Selection

One of the most important factors is the direction of the applied load.

A cam follower can experience:

• Radial load

• Axial load

• Side load

• Combined load

• Reversing load

• Impact load

A simple radial-load application is easier to evaluate.

However, if the force is applied at an offset from the mounting point, a bending moment can be generated.

This is particularly important for stud type cam followers.

The engineer should therefore consider not only:

Bearing load capacity

but also:

Stud bending + stud shear + mounting strength.

Why Stud Strength Matters

A common cam follower selection mistake is checking only the bearing load rating.

Consider a stud type cam follower mounted through a machine plate.

If the load is applied away from the mounting surface, the stud may be subjected to bending.

The result can be:

Bearing capacity = sufficient

but

Stud strength = insufficient

This can lead to premature failure even though the selected bearing appears adequate from the catalog load rating.

For heavy-duty applications, the stud should therefore be evaluated as a structural component.

Why Shaft Strength Matters for Yoke Type Track Rollers

Yoke type track rollers move the mounting problem from an integrated stud to a separate shaft.

This creates greater design flexibility but also creates another engineering responsibility.

The shaft should be evaluated for:

• Bending

• Shear

• Fatigue

• Deflection

• Surface hardness

• Wear

• Axial retention

For heavy-duty track roller systems, excessive shaft deflection can also affect load distribution.

Therefore:

Bearing selection and shaft selection should be treated as one engineering problem.

Track Design Is Just as Important as Bearing Selection

A cam follower runs directly against a track or cam surface.

If the track is too soft or poorly finished, the bearing may wear prematurely regardless of bearing quality.

Important track parameters include:

• Material

• Hardness

• Surface finish

• Flatness

• Contact width

• Lubrication

• Cleanliness

For high-load applications, engineers should also consider the contact stress between the roller and track.

The track should have sufficient strength to prevent excessive plastic deformation and wear.

Cam Follower Speed and Roller Diameter

Operating speed is another important consideration.

The roller rotational speed depends on the linear speed of the track and the effective roller diameter.

A smaller roller rotates faster for the same track speed.

Higher rotational speed can increase:

• Bearing temperature

• Lubricant demand

• Seal friction

• Rolling element stress

Therefore, the smallest bearing that physically fits the machine is not necessarily the best engineering choice.

For high-speed applications, bearing speed capability and lubrication should be evaluated carefully.

Sealed Cam Followers for Contaminated Environments

Industrial equipment frequently operates in environments containing:

• Dust

• Metal particles

• Water

• Cutting fluids

• Packaging debris

• Dirt

A suitable sealing system can help protect the internal rolling elements.

For applications exposed to water or frequent cleaning, additional attention should be given to:

• Seal design

• Corrosion resistance

• Lubricant compatibility

• Surface treatment

Food processing and washdown applications may require additional material and hygiene considerations.

How to Select a Stud Type or Yoke Type Cam Follower

A practical selection process can be divided into eight steps.

Step 1: Identify the Application

Determine whether the roller will be used in:

• Conveyor equipment

• Packaging machinery

• Automation

• Material handling

• Machine tools

• Agricultural machinery

• Heavy industrial equipment

Step 2: Determine the Actual Load

Calculate the working load rather than using only the machine's total weight.

Consider:

• Static load

• Dynamic load

• Acceleration

• Deceleration

• Shock

• Vibration

• Reversing motion

Step 3: Determine the Load Direction

Identify whether the load is:

• Radial

• Axial

• Combined

• Side-loaded

• Offset

This can strongly influence the appropriate mounting configuration.

Step 4: Determine Available Space

Measure:

• Outside diameter

• Roller width

• Mounting height

• Stud length

• Stud diameter

• Shaft diameter

• Available clearance

For compact machinery, a stud type design may provide an advantage.

Step 5: Check the Mounting Structure

For stud type:

• Stud diameter

• Stud length

• Thread

• Mounting hole

• Frame thickness

• Fastening method

• Bending load

For yoke type:

• Shaft diameter

• Shaft length

• Shaft material

• Shaft hardness

• Shaft support

• Axial retention

Step 6: Check the Track

Evaluate:

• Track material

• Track hardness

• Surface finish

• Track width

• Flatness

• Lubrication

Step 7: Check Speed and Environment

Consider:

• RPM

• Track velocity

• Temperature

• Dust

• Water

• Chemicals

• Washdown

• Outdoor exposure

Step 8: Select the Series and Model

A practical starting point is:

Stud Type

CF → KR → select the appropriate size based on load and installation requirements.

Yoke Type

NATR → NUTR → select the appropriate size based on load, shaft design, and mounting requirements.

The final model should then be verified against the manufacturer's technical specifications.

Cam Follower Model Selection Guide

The following table can be used as a preliminary engineering guide.

Important: These are representative model examples for product-family comparison. Actual dimensions, load ratings, internal construction, and interchangeability must be verified against the specific manufacturer's catalog.

Which Cam Follower Should You Choose?

A simple decision framework is:

Choose a CF or KR Stud Type Cam Follower When:

• The machine needs compact installation

• The mounting structure is standardized

• Easy replacement is important

• The load is primarily radial

• The application is automation or packaging

• Installation time should be minimized

Consider an NATR Yoke Type Track Roller When:

• A separate shaft is preferred

• The machine requires flexible mounting

• The application involves conveyor or guide systems

• The shaft needs to be customized

Consider an NUTR Yoke Type Track Roller When:

• Heavy loads are involved

• Shock loading is significant

• Heavy-duty conveyors are used

• Material handling loads are substantial

• Shaft and mounting rigidity are critical

Cam Follower Replacement: CF, KR, NATR and NUTR

Many industrial buyers are not designing a new machine.

They are looking for a replacement for an existing cam follower or track roller.

This creates a different selection process.

If an existing bearing has a part number such as:

• CF

• KR

• NATR

• NUTR

the replacement should not be selected based only on the model number.

Check:

• Outside diameter

• Bore or stud diameter

• Roller width

• Overall length

• Thread

• Mounting dimensions

• Load rating

• Seal arrangement

• Lubrication

• Material

• Operating conditions

A dimensional match does not automatically guarantee application compatibility.

Can a Stud Type Cam Follower Replace a Yoke Type Track Roller?

Not necessarily.

A stud type cam follower and yoke type track roller may perform the same basic rolling function, but their mounting systems are different.

Replacing one with the other may require changes to:

• Machine frame

• Shaft

• Mounting hole

• Fasteners

• Clearance

• Axial retention

Therefore, a direct replacement should be evaluated based on the complete assembly.

What About INA, IKO, McGill and Other Existing Bearings?

OEMs and maintenance departments often begin their search with an existing brand or part number.

For example, an engineer may search for:

• KR cam follower replacement

• NATR track roller replacement

• NUTR equivalent

• McGill cam follower replacement

• IKO cam follower alternative

• INA track roller alternative

This is a strong commercial-intent search because the customer already understands the component and is actively looking for a replacement.

For this reason, an industrial cam follower manufacturer should provide:

• Dimensional comparison

• Application evaluation

• Technical drawings

• Load information

• Material information

• Mounting recommendations

Rather than simply stating that two products are "equivalent."

Why OEM Buyers Should Look Beyond Unit Price

For a machine manufacturer, the purchase price of one cam follower is only one part of the total cost.

The actual cost can include:

• Installation labor

• Maintenance labor

• Replacement frequency

• Machine downtime

• Track wear

• Lubrication

• Inventory

• Emergency replacement

For production equipment running multiple shifts, a premature cam follower failure can cost considerably more than the original bearing price.

Therefore, OEM buyers should evaluate:

Initial cost + service life + maintenance + downtime

rather than unit price alone.

Why Work With an Experienced Cam Follower Manufacturer?

For OEM applications, selecting the correct cam follower often requires more than a standard part number.

An experienced manufacturer should be able to evaluate:

• Load

• Speed

• Installation

• Track geometry

• Lubrication

• Sealing

• Operating environment

• Expected service life

SUMA has more than 25 years of manufacturing experience in cam follower bearings and industrial roller bearings.

SUMA's product range can support applications requiring:

• Stud type cam followers

• Yoke type track rollers

• Heavy-duty track rollers

• Needle roller cam followers

• Sealed cam followers

• Metric configurations

• Inch configurations

• OEM and custom solutions

For OEMs and industrial distributors, application-based selection can help avoid simply replacing a bearing with an unsuitable dimensional equivalent.

Frequently Asked Questions

What is a stud type cam follower?

A stud type cam follower is a track roller with an integrated mounting stud. It can be installed directly into a machine structure and is commonly used in automation, packaging, conveyors, and industrial machinery.

What is a yoke type track roller?

A yoke type track roller uses a separate shaft or pin instead of an integrated stud. This provides greater flexibility when designing the machine's mounting structure.

What is the difference between stud type and yoke type cam followers?

The main difference is the mounting structure. Stud type cam followers integrate the stud into the bearing assembly, while yoke type track rollers use a separate shaft.

Are KR cam followers stud type?

KR series cam followers are commonly associated with stud type cam follower configurations. The exact construction and specifications should be verified against the manufacturer's catalog.

Are NATR track rollers yoke type?

NATR configurations are commonly used as yoke type track rollers with a separate mounting shaft.

Are NUTR track rollers suitable for heavy-duty applications?

NUTR configurations are commonly selected for demanding track roller applications, including conveyors and material handling. The exact load capacity depends on the individual model.

Which is better for conveyors: CF, KR, NATR or NUTR?

There is no universal answer.

CF and KR can be suitable for compact conveyor and automation applications where an integrated stud is convenient.

NATR and NUTR can be advantageous when a separate shaft and more flexible mounting arrangement are required.

The correct choice depends on load, speed, track design, and mounting structure.

Which cam follower is best for automation equipment?

Stud type cam followers such as CF and KR configurations are often suitable for automation equipment because they provide compact mounting and relatively simple installation.

Which track roller is best for heavy conveyors?

For heavy conveyor applications, larger yoke type configurations such as NUTR may be considered when the load and mounting structure require a separate shaft.

The final selection must be based on the actual load rating and application conditions.

Can SUMA provide a replacement for an existing cam follower?

Yes. For replacement projects, provide the existing part number, dimensions, application, load, speed, and operating environment. The replacement should be evaluated dimensionally and technically before approval.

Final Selection: Stud Type or Yoke Type?

There is no single cam follower configuration that is best for every machine.

The right selection depends on the complete application.

For compact automation and packaging equipment:

CF / KR stud type cam followers can be a strong starting point.

For conveyors and guide mechanisms:

CF / KR or NATR may be considered depending on the mounting arrangement and load.

For heavy material handling and industrial conveyors:

NUTR and other heavy-duty yoke type track rollers may be more appropriate when a separate shaft and robust mounting system are required.

The most important principle is:

Select the cam follower as part of the complete mechanical system—not as an isolated bearing.

Evaluate the bearing, stud or shaft, track, load, speed, lubrication, sealing, and mounting structure together.

For an existing CF, KR, NATR, NUTR, or other cam follower/track roller, SUMA can evaluate the dimensional and application requirements and recommend an appropriate solution for OEM and industrial applications.