Technical articles on CNC machining processes, machining problems, tooling, surface finish, tolerances, and practical shop-floor solutions.
Aluminum naturally resists corrosion because it forms a thin protective oxide layer in air. That layer reforms after CNC machining, so machining alone does not make chromate conversion coating necessary. Additional protection becomes useful when moisture, salts, or service conditions demand more than the natural oxide layer can provide.
Chromate conversion coating helps protect machined …
Circular milling uses a rotating cutter traveling around a circular path to machine round holes, pockets, and outside profiles. It is useful when a part needs several opening sizes, a custom-diameter recess, or circular features alongside other milled details. One suitable cutter can produce different diameters by changing its path.
For a customer, the main …
For early planning, allow roughly one to two weeks to manufacture straightforward CNC prototypes when material is available and the drawing is approved. Complex parts and production batches may need several weeks. These are planning estimates, not confirmed delivery dates. Finishing, inspection requirements, and shipping can extend the schedule.
When parts are needed for assembly …
Choose a CNC machining supplier that has made parts similar to yours, can explain the important details on your drawing, and provides a clear quote with realistic delivery terms. Before placing an order, agree on how the parts will be inspected and what happens if something does not meet the drawing.
The difficult part is …
A bearing ring exposed to a rotating load normally needs an interference fit to prevent it from creeping on the shaft or inside the housing. A ring exposed to a stationary load can often use a transition or clearance fit. The final tolerance still depends on the bearing type, size, load, temperature, internal clearance and …
For a purchased bushing, use the manufacturer’s recommended housing bore instead of calculating the hole from nominal OD alone. For a custom solid bushing, calculate minimum and maximum interference from the bushing OD and housing-bore limits. In both cases, verify the installed ID because press fitting can reduce the final shaft clearance.
This distinction is …
Dowel pin hole tolerance should be selected according to how the pin works in the assembly. One component normally uses a press-fit hole to retain the pin, while the mating component uses a slip-fit hole for accurate location and easier assembly. Hole diameter alone is not enough. Position, datums, material, coating and inspection also affect …
An O-ring groove must compress the seal enough to stop leakage while leaving room for the elastomer to spread and change with pressure and temperature. In a CNC machined part, groove depth, width, surface finish, edge condition, and the mating geometry all affect whether the seal works. A groove can measure correctly and still leak …
Gears may look simple, but their teeth have to mesh at the correct position, angle, and spacing for the part to run smoothly. A small error in tooth profile or runout can cause noise, vibration, uneven wear, or poor power transmission.
Gear machining is the manufacturing process used to create the gear blank, cut the
Centerless grinding is used to finish the outside diameter of round parts such as shafts, pins, rods, rollers, bushings, and valve components. It removes a small amount of material to improve diameter accuracy, roundness, straightness, and surface finish.
Unlike conventional cylindrical grinding, the workpiece is not clamped in a chuck or held between centers. It …
