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CMI, an American manufacturer founded in the mid-20th century, earned a reputation for producing durable construction machinery. Among their notable models is the CMI 65 Autograder, designed primarily for fine grading applications. This machine integrates traditional grader functions with specialized hydraulic systems to allow precise surface adjustments.
Design and Functionality
The CMI 65 features a low-profile front axle, possibly intended for mining or tight-space operations. Unlike standard oscillating axles found on many road graders, its front axle uses dual A-arms, each actuated by hydraulic cylinders. These cylinders enable minute adjustments of the front end, facilitating incremental grading changes. A mounted scarifier adds versatility, allowing the operator to break up hard surfaces before grading.
Hydraulic and Control Systems
Hydraulics on the CMI 65 are robust and include dedicated lines for string line wands, enhancing accuracy for linear projects such as road or site layout work. This feature underscores the autograder’s focus on precision rather than speed, making it ideal for construction sites demanding tight tolerances.
Operational Insights
Operators valued CMI machines for their reliability and adaptability. Even as older models like the 65 Autograder age, enthusiasts note the clever engineering behind the hydraulic front axle system. Some machines show cylinder settling over time, giving the appearance of axle issues, but careful examination reveals intact structures. Collectors often admire the original paint and decals, such as those from Madonna Construction, reflecting the historical legacy of regional contractors.
Market Presence and Legacy
While CMI eventually ceased production, their machinery remains sought after by collectors and niche contractors. Machines in better condition occasionally surface for sale, illustrating the enduring quality of CMI engineering. The 65 Autograder, with its precise hydraulic controls and durable design, represents a unique chapter in American earthmoving equipment history.
Design and Functionality
The CMI 65 features a low-profile front axle, possibly intended for mining or tight-space operations. Unlike standard oscillating axles found on many road graders, its front axle uses dual A-arms, each actuated by hydraulic cylinders. These cylinders enable minute adjustments of the front end, facilitating incremental grading changes. A mounted scarifier adds versatility, allowing the operator to break up hard surfaces before grading.
Hydraulic and Control Systems
Hydraulics on the CMI 65 are robust and include dedicated lines for string line wands, enhancing accuracy for linear projects such as road or site layout work. This feature underscores the autograder’s focus on precision rather than speed, making it ideal for construction sites demanding tight tolerances.
Operational Insights
Operators valued CMI machines for their reliability and adaptability. Even as older models like the 65 Autograder age, enthusiasts note the clever engineering behind the hydraulic front axle system. Some machines show cylinder settling over time, giving the appearance of axle issues, but careful examination reveals intact structures. Collectors often admire the original paint and decals, such as those from Madonna Construction, reflecting the historical legacy of regional contractors.
Market Presence and Legacy
While CMI eventually ceased production, their machinery remains sought after by collectors and niche contractors. Machines in better condition occasionally surface for sale, illustrating the enduring quality of CMI engineering. The 65 Autograder, with its precise hydraulic controls and durable design, represents a unique chapter in American earthmoving equipment history.
