The Okamoto UPZ 820 Li combines a rigid traveling-column structure with linear-motor table movement for demanding precision grinding applications. Digital scale feedback, CNC positioning, and automated grinding cycles provide the process control required for intricate forms, slit grinding, and varied production requirements. Its multi-position capability also provides flexibility for small-lot, high-mix manufacturing.
UPZ 820 Li Form Grinder Features:
| Max Cross Travel | 17.75" |
|---|---|
| Max Table Travel | 19.7", 2.75" |
The Okamoto UPZ 820 Li is a precision form grinder built for complex components requiring tight tolerances and repeatable positioning. A rigid traveling-column design provides a stable foundation for demanding grinding applications. In addition, digital scale feedback on the vertical and cross axes supports precise positioning throughout the grinding cycle. This combination provides the control required for intricate geometries, fine surface finishes, and precision slit grinding.
A linear motor drives the longitudinal table to provide high-speed stroke performance without sacrificing positioning stability. The drive system eliminates conventional table-drive components while supporting responsive motion during short-stroke and detailed grinding operations. Combined with digital scale feedback, the UPZ 820 Li supports high-speed surface grinding where dimensional accuracy and surface quality must remain consistent across repeated parts.
The UPZ 820 Li supports multi-position grinding for manufacturers processing varied part geometries and small production quantities. A FANUC 0-iMF CNC provides simultaneous two-axis operation across three controlled axes. Automatic grinding, shift-plunge grinding, and dressing cycles further reduce manual intervention. In addition, a standard three-point dresser maintains wheel condition, while an optional rotary dresser expands capability for more complex grinding profiles.
| Max Cross Travel | 17.75" |
|---|---|
| Max Table Travel | 19.7", 2.75" |
UPZ 820 Li Specifications
For shops evaluating fine form and surface grinding where profile fidelity, finish, and thermal control are critical, the Okamoto UPZ 820 Li provides a CNC ultra-precision form grinder platform. The application should be sized from the finished feature requirements first, then checked against wheel reach, stock removal, dressing, coolant, and workholding constraints. As an authorized Okamoto distributor, A.W. Miller supports manufacturers across New York, Pennsylvania, Maryland, Delaware, Southern New Jersey, and Quebec with machine selection, process engineering, installation, training, and factory-certified service.
Process development on the UPZ 820 Li should account for how the wheel changes from roughing through finishing. Stock distribution, dress compensation, spark-out, thermal stability, workholding stiffness, and measurement strategy all affect whether the required geometry can be repeated in production.
Parts and processes commonly evaluated for the Okamoto UPZ 820 Li include:
The UPZ-Li platform is intended for complex components where wheel form, positioning, and surface quality require tighter process control.
A standard three-point dresser supports repeatable wheel maintenance, with an optional rotary dresser available for more advanced profiles.
Automatic grinding, shift-plunge, dressing, and chuck-datum cycles reduce manual intervention in precision form work.
Coolant temperature control, magnetic separation, wheel balancing, and probing options can be selected around the thermal and finish requirements of the application.
Its emphasis is ultra-precision form grinding, where profile accuracy, wheel conditioning, fine positioning, and thermal stability are central to the process.
Complex form grinding depends on reproducing the required wheel geometry. The standard three-point dresser and optional rotary dressing capability provide different approaches to that requirement.
Yes. Okamoto lists automatic grinding, shift-plunge, automatic dressing, and chuck-datum cycles as part of the machine’s CNC process capability.
It becomes important when thermal variation can consume a meaningful portion of the tolerance or affect repeatable surface finish during longer grinding cycles.
Provide the part profile, tolerance, finish, material, stock allowance, wheel requirements, dressing geometry, inspection method, and expected production quantity.