Heavy Duty Universal Milling Machines

A CNC knee mill uses a digital control system — such as the G2 Acu-Rite Mill Power — to automate axis movements with programmable feed rates and positions, enabling repeatable precision cuts. A manual knee mill relies on handwheels and operator input for all movements, offering flexibility and simplicity. Many operators prefer CNC for production runs and manual for prototype or custom one-off work.

The Clausing knee mills in this category offer variable spindle speeds from 60 to 4,300 RPM in manual variable speed models, and 50 to 5,000 RPM in electronic inverter variable speed models. This wide range accommodates a variety of materials and cutting operations, from heavy roughing cuts at lower speeds to fine finishing passes at higher RPMs.

Table sizes range from 9 x 49 inches up to 11 x 58 inches across the CNC Knee Mill lineup. The Clausing 3VS08 features a 10 x 54 inch table with a load capacity of 665 lbs. All tables feature hardened and ground surfaces with precision ground T-slots for accurate workpiece fixturing.

Yes. The Clausing CNC Knee Mill is designed for flexible operation. It can be run as a fully manual machine with a DRO, in semi-automatic mode, or as a full 2-axis or 3-axis CNC machine using the G2 Acu-Rite Mill Power Control. This makes it ideal for shops transitioning to CNC or requiring both modes for different job types.

These Clausing knee mills are available with R8, NMTB 30, or NMTB 40 spindle tapers. R8 is the most common choice for standard shop tooling, while NMTB 30 and NMTB 40 suit heavier-duty industrial applications requiring larger, higher-torque toolholders. The 3.38-inch quill diameter supports rigidity across all taper configurations.

These milling machines are well-suited for aerospace and defense, medical device manufacturing, mold machining, general machining operations, and heavy precision manufacturing. Their Meehanite cast construction, Turcite B-coated ways, and high-rigidity designs meet the accuracy and durability demands of professional machine shops and industrial production facilities.

Every machine comes with a one-year warranty backed by the Clausing Service Center. Support includes highly qualified technicians available for both phone and on-site assistance. The service center maintains an inventory of over 80,000 parts, with 95% of all orders shipped within 24 hours, minimizing machine downtime for your operations.