Pocket Milling

Stepdown, stepover, entry method and chip evacuation.

Start with the part, not the brochure

Define the largest and smallest parts, materials, tolerance, finish, annual quantity, setup frequency and inspection method. A machine that looks impressive may be a poor fit if it creates excessive setup time, cannot hold the needed tooling, or lacks local support.

Verify the complete system

The useful machine is the machine plus control, options, workholding, tooling, coolant or extraction, metrology, software, postprocessor, training, power, air and service. Missing pieces can cost more than the apparent discount.

Document before committing

Record the exact model, serial number, control version, option list, spindle and taper, axis travels, table or chuck capacity, electrical requirements, machine weight, included tooling and known defects. Save listing photographs and seller statements.

Define the feature

For pocket milling, document geometry, tolerance, finish, datum structure, stock condition, tool access and inspection method before selecting a toolpath.

Plan the setup

Check workholding, tool reach, holder clearance, chip evacuation, coolant direction and the sequence of roughing, semi-finishing and finishing operations.

Prove out deliberately

Use simulation and controlled machine prove-out. Verify the active work offset, tool, length and diameter data, spindle direction, coolant, safe approach and expected remaining stock.