We share information and tips we’ve learned from our experience in the CNC machining and sheet metal fabrication industry.
Hole diameter looks like a simple dimension on a drawing, but in CNC machining it can decide whether a shaft slides, a pin locates, a screw clears, a seal works, or an assembly fails. Many design problems start when a drawing asks for a tight diameter without explaining the function, or when a shop treats […]
Through holes are one of the most common and practical features in CNC machined parts. A through hole passes completely through the material, creating an open path from one side of a part to the other. This simple definition often hides important design decisions: clearance, position tolerance, edge distance, burr control, surface finish, thread engagement, […]
Threaded holes are small machining features with a major effect on assembly quality. They allow screws, bolts, studs, and adjustment hardware to fasten directly into a CNC machined part without using a separate nut. The feature is common in housings, brackets, plates, flanges, covers, manifolds, fixtures, and precision mechanical assemblies. However, a threaded hole is […]
Tapped holes are small features, but they often decide whether a machined part can be assembled, serviced, sealed, adjusted, or mounted correctly. A housing may look perfect from the outside, yet a wrong thread depth, unclear callout, oversize pilot hole, or broken tap can make the part unusable. For buyers and designers ordering custom CNC […]
Reamed holes are one of the most important precision hole features in CNC machining because they turn an ordinary pre-drilled hole into a more controlled functional feature. Designers usually specify reamed holes when a pin, dowel, shaft, bushing, or locating element must fit smoothly and repeatably without excessive clearance. In manufacturing discussions, many questions around […]
Precision holes are one of the most important CNC machining features because they control how a machined part fits, moves, seals, or assembles. On a drawing, a precision hole may look like a simple circular opening, but in production it usually has a strict functional purpose. It may locate a dowel pin, guide a shaft, […]
Drilled holes are among the most common features in CNC machined parts, but they are not always as simple as they look on a drawing. A round opening may decide whether a screw fits, a dowel aligns, a fluid passage works, or an assembly can be installed without rework. This guide explains drilled holes as […]
Deep holes are not simply holes that look long on a drawing. In CNC machining, a deep hole is usually understood by its depth-to-diameter ratio, because a narrow hole becomes difficult much faster than a large hole of the same depth. This feature appears in shafts, manifolds, housings, molds, hydraulic parts, cooling components, alignment parts, […]
Countersunk holes are small CNC machining features with a large effect on assembly quality. They allow flat-head fasteners to sit flush with, or slightly below, a machined surface. This helps covers, brackets, panels, housings, fixtures, and precision plates remain smooth, compact, and safe to handle. Although the feature can look like a simple bevel, it […]
Counterbored holes are common in CNC machined parts because many assemblies need fastener heads to sit in a controlled recess instead of standing above the surface. They appear in housings, brackets, fixture plates, covers, frames, and precision mechanical parts where clearance, appearance, clamp consistency, or head protection matters. Although the feature looks simple, real problems […]
Polypropylene and PVC are common thermoplastics, but they solve different design problems. The better choice depends on load, flexibility, chemical exposure, joining method, storage safety, outdoor use, and manufacturing process. This makes the comparison more useful for real drawings and purchase specifications. What Is Polypropylene? Polypropylene, or PP, is a low-density semi-crystalline plastic known for […]
Polypropylene and polyethylene are both polyolefin thermoplastics, so they can look similar in a product catalog. Both are lightweight, moisture resistant, chemically resistant, and commonly used in molded, extruded, fabricated, and machined plastic parts. The important difference is that they do not behave the same under heat, impact, bending, cold service, or precision machining. For […]
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