Rollers and Idlers - DMC Wear Parts

11 Aug.,2025

 

Rollers and Idlers - DMC Wear Parts

Aftermarket Replacements & Undercarriage Maintenance Parts

All construction professionals should try to know the ins and outs of their equipment. When machine operators know their equipment and what they need to get the job done, it ensures things go smoothly on the job site. Additionally, when a professional knows how to maintain their equipment, they can minimize wear and tear on these important machines over time.

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DMC Wear Parts offers an extensive range of undercarriage idler and roller components for crawlers, dozers, excavators, compact track loaders, and other types of heavy track equipment. Our aftermarket parts are manufactured to the highest quality standards and fit top brands such as Caterpillar, John Deere, Hitachi, Komatsu, Kobelco, CASE, and more. In addition to standard road maintenance and construction applications, DMC Wear Parts also covers parts for asphalt road paving, drilling, forestry, and agricultural applications. Our replacement parts are backed by a 3-year manufacturer warranty.

Aftermarket Undercarriage Idlers

Idlers are an essential piece of any steel track or rubber track construction equipment undercarriage. DMC Wear Parts offers a range of products from simple idler wheels or completely assembled idlers that are pre-filled with oil and factory sealed. These pre-assembled idlers are better than typical replacement parts and make the installer and operator’s jobs significantly easier. Our pre-assembled idlers are available in complete idler groups including the arms, brackets, or direct bolt-on upgrades for low hassle installation.

What is an idler?

In a machine’s undercarriage, the idler is most commonly located in the front and/or rear of the undercarriage, as its job is to move the track and propel the machine forwards and backward. The front idler also keeps everything aligned and absorbs the impact of the shock while driving the machine. Idlers are wheel-shaped and usually quite sizable. They work with the tensioner in the undercarriage to ensure adequate tension of the track to prevent the track from falling off. This ensures that the track chain stays aligned during movement across rough and challenging terrain.

Front Idlers (Track Idlers)

DMC Wear Parts carries front idlers that are made from high-quality steel and heat-treated to offer consistent quality and performance. Our track idler product offerings are available in a variety of configurations:

  • idler body
  • idler with bushings and shaft
  • idler with collars
  • idler with fork
  • idler with tensioning unit

Aftermarket Undercarriage Rollers

Our top and track rollers are designed for excellent performance in the toughest environments for all types of dozers and crawlers. Our lines of lower track rollers and the upper carrier rollers are designed to hold up in the most challenging conditions. We have a wide range of aftermarket rollers to fit all common equipment models and makes from the top manufacturers: Caterpillar, John Deere, Kobatsu, CASE, Kobelco, and more.

What is a roller?

A roller is a cylindrical part placed at both the top and bottom of the track; rollers work to reduce load weights on your front wheels and sprockets. Investing in quality rollers for your equipment can reduce wear on many parts of your machine, saving you money in the long run. 

Top Rollers vs. Bottom Rollers

The undercarriage will typically have two rollers at the top of the track and six to eight bottom rollers. The top rollers support the chain and the track, while the bottom rollers support the machine’s weight.

Routine Inspections of Idlers and Rollers

Ideally, a daily inspection is suggested for your machine’s undercarriage to ensure no apparent issues and leakages. However, if you are not an expert, take the machine in for routine inspection by a professional. Creating a regular schedule for a deep inspection for the entire undercarriage and sticking to it can help drastically reduce significant malfunctions with the equipment. Here are a couple of common issues to look for in idlers and rollers:

Idlers:  Search for anything out of the ordinary and clear examples of damage, such as dents, cracks, or oil leaks.

Rollers: Dents, cracks, and leakages. Run the machine to ensure that all rollers are performing as expected.

Want more information on idler roller types? Feel free to contact us.

Maintenance Costs for Idlers and Rollers

Costs will vary by machine and manufacturer, but they can be kept low by regular inspection and removing dirt and debris. Replacement and aftermarket parts can generally run in the price range of hundreds or thousands, depending on the machine and par.

Replacing and Maintaining Idlers

If your idler is damaged on the job site or needs a replacement, first consult the owner’s manual to ensure you order the correct part. DMC Wear Parts has a wide selection of idlers to match all common makes and models for the leading manufacturers.

To limit and avoid the idler replacement process, make sure to perform regular inspection and maintenance on your equipment. These routine inspections will help you identify problems early on and save you money in the long run. Having a professional install the idler might be expensive, but it saves time and could very well prevent future issues. If you plan to replace it yourself, one of the essential steps is to consult the owner’s manual or manufacturer instructions, as each machine and its process might be different.

When inspecting idlers, always search for oil leakage. It can be a warning sign that the seal is no longer working, which can cause further damage to your equipment. If the idlers appear to be in good shape, you can further inspect them by grabbing your user manual and a depth gauge. Use your depth gauge to measure the idler and compare the current size to the original listed in the manual. If you do not own the user manual, there are resources online that will have the measurements or you can contact DMC Wear Parts and we will help you find all the information you need.

Worn idlers can have serious, long-term consequences like drag, which can cause de-tracking and excessive wear on your idler. Many of our clients’ machines tend to operate in rugged terrain, which increases vulnerability to being worn down over time. However, as previously mentioned, routine inspections and maintenance can keep these issues from becoming much more significant problems.

How Do I Check The Undercarriage Of My Equipment?

Checking the overall state of the undercarriage should be an essential part of every construction site or project, ultimately contributing to the safety of everyone on-site. To ensure that your equipment is in good working order, you should regularly check the entire undercarriage of your machine.

Inspect all aspects, such as the sprockets, bushings, idlers, and rollers, looking for any looseness in the bolts, damaged or missing parts, corrosions, and oil leaks. Systematic and consistent upkeep will help the machine run safely, not break down while being used, keep your project on time, and save you money.

Undercarriage Solutions For All Types Of Heavy Equipment

The undercarriage of your machine will provide stable movement of the machine throughout the construction site in any conditions. An undercarriage should also have the appropriate characteristics for its load, the job site and be durable enough to withstand the harsh environment in which it will operate. 

The best solution for all types of heavy equipment is to keep the undercarriage clean and free of debris and having regular inspections that follow a preset schedule. 

Plan for the future. Knowing what parts are at the end of their lifespan can help you get ahead of repairs and avoid on-site issues. This can aid in budgeting for the replacement parts ahead of time as well.  

Do you have additional questions about idlers and rollers or any other piece of machine undercarriage equipment? We have an extensive catalog of over 50,000 parts including: track chains, sprockets, segments, rock guards, guides, wear strips, roller mounting strips, roller frame covers, track adjuster assemblies, rods, cylinders, recoil springs, top roller strands, and more. Feel free to contact us – we would be glad to assist you in any of your heavy equipment needs and get your job back on track! 

For more Conveyor Idler Rollersinformation, please contact us. We will provide professional answers.

The types of idler and a brief introduction

The types of idler and a brief introduction

EXCTMACH is a professional manufacturer of conveyor idler, In order to ensure the production quality of conveyor idler, excellent tooling and equipment are needed.Our company has advanced Automatic Chamfering cutting machine for steel pipe,Automatic CO2 gas-shielded Dual-torch welding machine, Double end Automatic hole machine Tool for steel pipe, Automatic machine Tool for elevator Press Assembly, Roller Automatic paintingProduction line, and other equipmen.
Our EXCT prudcttion conveyor idler/roller The main types of steel carrying idler/roller,return idler/roller, impact idler/roller, Self aligning roller/idler, Comb roller/idler, Spiral roller/idler and so on. Application:
This product is mainly applicable to belt conveyor used in underground coal mine, open air coal preparation and so on
The carrying reference bar, return reference bar and buffering reference bar.The main purpose is to support and drive the tape, reduce the transport resistance.Line resistance, and make the sag of the conveyor belt does not exceed a certain limit, to ensure the smooth operation of the conveyor belt.The idler rolls by the friction between the axle and the rubber belt, thus achieving the purpose of working.
Features:
The bar bearing rest of this product is made of 08F pressed bearing rest, and the reference shaft is adopted 20# steel is processed after cold drawing and strengthening, KA series special high-quality bearing for supporting shaft is selected, anti-aging 2
No. Cone grease, flame retardant special contact seal for the meteorite, high precision and high frequency welded tube for the tube leather Cutting trading machine and car trading machine processing, the simple skin and the bearing seat welding joint use special bracket double head welding machine.production The product has good waterproof and dustproof performance, small rotation resistance, and running balance, long service life and so on Points.
How it works
When the supporting stick is working, the outer cylinder of the supporting stick is rotated by relying on the friction between the supporting shaft and the adhesive tape.Play the purpose of support and transmission.The size of the oxiu force by the shaft rotation resistance, belt weight, materialWe confirm it together.To reduce the rotation resistance of the supporting shaft, the friction can be effectively reduced, and then reduce power consumption.
Structure overview
The supporting rod is composed of a tube body, a bearing seat, a bearing, a shaft and a seal. The bearing cloth is in the supporting rod tube body
Inside, between the thousand shaft and the bearing seat, the outside of the bearing seat covers the pipe body, and the buffer glue round bag of the supporting rod
The conveyor idler wrapped on the tube body and ACTS as a buffer and protection. The pipe shall be made of seamless steel pipe or special high frequency welded pipe.Seamless steel pipe wall thickness uneven, resulting in the rod transport
Dynamic load is generated in the line, which makes the conveyor belt vibrate, and the bearing and seal are damaged prematurely. It is used for low as boat
Speed conveyor.Commercial frequency welded pipe wall uniform, smooth operation, suitable for quotient speed conveyor.
This series of brackets is made of 08F material, which is light in weight, easy to manufacture and cost
The low advantage, made of the support rod rotation resistance is small, can effectively reduce the power consumption of the conveyor.
Large clearance bearing is used to improve the working condition of the bearing and reduce the load
The resistance of small supporting roller reduces the manufacturing cost of supporting rod.
This series of supporting stick adopts labyrinth seal, which can be better dustproof and waterproof.
This series of supporting stick adopts aging resistant grease, which not only plays a good lubricating role, but also can be used
To cooperate with the seal, strengthen the sealing effect. The supporting shaft of this series of supporting rods is made of 20# steel after being cold-drawn and strengthened. Installation, adjustment and test run
Installation
The installation of supporting rods is divided into factory assembly and field installation.The factory assembly is carried out at the supporting shaft manufacturing plant, of which
The general order is: check of bearings and seals, wash and oil, check of bearing seat, wash and rust. Simplified Chinese processing and welding, and then in the special press for assembly, assembly according to the direction from the inside out
Press in order piece by piece.Test run at any time after assembly, check whether the movement is flexible and adjust immediately. The onsite installation of idlers shall be carried out before the conveyor support is installed and the conveyor belt is laid:
(1) Idlers shall install all kinds of idlers at the designated position '.0 according to the general drawing of the belt conveyor
(2) Before installation of the supporting rod, check whether the specifications and models meet the requirements of the transmission machine and whether there is any damage
Elephant.After installation, rotation should be flexible.
(3) It is required that the upper surface of the supporting rod (except for the aligning supporting rod and the transition supporting rod) should be located at the same level during installation
And up (horizontal or sloping) or up at an arc of a common radius (concave or convex arc of the conveyor).
The quotient difference on the upper surface of the three adjacent groups of supporting sticks shall not exceed 2mm, and shall not be within the range of 100 meters
More than 5 mm.The symmetry degree of the center line of the bracket is mm.
Adjustment test run
The adjustment and test run of the supporting rod are carried out simultaneously with the equipped conveyor, and the test run is to be observed
Whether the conveyor idler is in contact with the conveyor belt and whether there is abnormal noise and smell.
X. Maintenance and repair
(1) Maintenance
In the process of use, it is necessary to timely support the stick on the adhesive.
If the supporting stick has abnormal sound, it should be replaced and checked in time.
(2) Repair
The repairing and burying of the supporting rod is mainly to disassemble, wash and check the pipe body with less wear and inflexible rotation
Remove, replace, assemble, and generally replace bearings and seals.Disassembly shall be in the order from the outside to the inside
Piece by piece.The buried supporting rods should meet all the requirements.