New High Performance Circle for Cat® motor graders improve machine performance, efficiency and uptime

The new HPC improves machine performance, efficiency and uptime availability compared to the previous Cat motor grader series in earthmoving and road building applications.

Highlights

  • New fully sealed bearing design reduces operator touchpoints and extends service intervals
  • Delivers increased circle torque, performance and improved durability
  • Applies to the most recent design for the Cat® 140 JOY, 150 JOY and 160 JOY motor graders

 

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IRVING, Texas, May 8, 2025―The new High Performance Circle (HPC) design available for today’s Cat® 140 JOY, 150 JOY and 160 JOY motor graders helps to eliminate hours of monthly planned maintenance for frequent inspection, wear strip replacement and circle shoe adjustments associated with conventional circle designs. The new HPC improves machine performance, efficiency and uptime availability compared to the previous Cat motor grader series in earthmoving and road building applications.

Our new HPC provides more hours-of-service life, to significantly reduce planned maintenance. Caterpillar’s industry-leading machining capabilities, designed to tight tolerances, help ensure high-precision alignment of the drawbar, drives and circle, so it requires no adjustments for the life of the grader

Eric Kohout

Product Application Specialist for Cat Motor Graders

Caterpillar

Proven design

Adopted from the Cat excavator swing drive and 14 motor grader worm drive, the HPC features a fully sealed bearing design. It replaces the previous open circle and drawbar, reducing operator touchpoints, extending service intervals and improving machine uptime. Additionally, the HPC provides smooth, effortless blade rotation and assists in meeting jobsite and road design elevation tolerance. 

 

Reduced maintenance, improved safety 

The new HPC maintains the same machine connection interface as the standard drawbar/circle/moldboard. An innovative pinion gear shape with a large shaft diameter delivers durable operation and allows the drive to be removed vertically without drive adjustments. Dowel locators precisely position motors for simplified servicing, optimal tooth contact and long pinion life. Its new design improves component reliability to reduce downtime and maintenance costs.

The new design significantly increases wear life between the circle and drawbar, and it reduces the likelihood of excessive clearance between the circle and drawbar surface. Its centrally located grease bank offers quick and easy servicing, while the easily accessible ring gear provides quicker inspection and maintenance.

Beyond lowering total cost of ownership, less required circle maintenance reduces component handling to properly maintain the machine, which improves safety for service technicians. If the circle teeth have reached their wear limit, they can be rotated 180 degrees to double the component’s service life.

More information on the new HPC design for 140 JOY, 150 JOY and 160 JOY motor grader models can be found by contacting a Cat dealer or visiting cat.com

 

Cat® High-Performance Circle Specifications

 

Circle

Diameter – mm (in)

1530 (60.2)

Height – mm (in)

139 (5.5)

Blade Beam Thickness – mm (in)

90 (3.5)

Drawbar

Height – mm (in)

154,4 (6.0)

Thickness – mm (in)

12,7 (0.5)

Circle Speed (rpm)

1.22

 

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HPC on Cat® 150 Motor Grader

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HPC on Cat® 150 Motor Grader

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HPC on Cat® 150 Motor Grader

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HPC on Cat® 150 Motor Grader

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About Caterpillar:
With 2024 sales and revenues of $64.8 billion, Caterpillar Inc. is the world’s leading manufacturer of construction and mining equipment, off-highway diesel and natural gas engines, industrial gas turbines and diesel-electric locomotives. For 100 years, we’ve been helping customers build a better, more sustainable world and are committed and contributing to a reduced-carbon future. Our innovative products and services, backed by our global dealer network, provide exceptional value that helps customers succeed. Caterpillar does business on every continent, principally operating through three primary segments – Construction Industries, Resource Industries and Energy & Transportation – and providing financing and related services through our Financial Products segment. Visit us at caterpillar.com or join the conversation on our social media channels at caterpillar.com/en/news/social-media.html.

NOTE TO EDITORS: Caterpillar rolls out products and services in each of its regions at different time intervals. Although every effort is made to ensure that product information is released only after Caterpillar has received confirmation from its independent dealer network, plants, and marketing subsidiaries that products and services are available in the relevant region, editors are kindly requested to verify with a Cat dealer for product availability and specifications.

CAT, CATERPILLAR, LET’S DO THE WORK, their respective logos, “Caterpillar Corporate Yellow,” the “Power Edge” and Cat “Modern Hex” trade dress, as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.

VisionLink is a trademark of Caterpillar Inc., registered in the United States and in other countries.

 

 

Press Inquiries:

Johanna Kelly
Caterpillar Trade Press Media Representative
Kelly_Johanna_L@cat.com
 
For Release: North America, Chile, Colombia, Australia, and New Zealand
Release Number: 50PR25 — May 2025



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