Which CNC turned parts can you send for review?
Our focus is cylindrical and rotational metal parts, including solid shafts, hollow sleeves and stepped or threaded profiles. Typical features include diameters, bores, shoulders, grooves and threads. Use the part guides below to identify the details needed for your drawing review.
- Custom shafts and stepped shafts
- Identify bearing seats, critical diameters, shoulders, grooves and threads, including the mating fits that affect assembly.
- Bushings, sleeves, collars and spacers
- Specify inside and outside diameters, wall thickness, length and fit surfaces. Mark any thin sections or finish requirements.
- Threaded components, fittings and pins
- Include the thread standard, pitch, fit class, thread length and any gauge requirements, alongside locating or contact surfaces.
- Hydraulic cylinder turned components
- Send the component drawing with seal grooves, sliding surfaces, mating dimensions and edge conditions so we can assess machining suitability for the intended application.
- Gear-related turned blanks
- Define the bore, faces, shoulders and blank profile, and identify any subsequent gear cutting or finishing requirements for review.
Is CNC turning the right process for your part?
A strong-fit part usually has a dominant centreline and is defined mainly by outside diameters, bores, faces, shoulders, steps, tapers, grooves or threads. Cross holes, flats, slots and similar non-rotational details may still be possible as secondary operations, but they should be identified on the drawing so the complete process can be reviewed before quotation.
Parts dominated by large flat surfaces, deep irregular pockets or complex freeform geometry may require a milling-led process instead. Send the drawing even if you are unsure: we will review whether turning is the right primary process before proceeding.
Can you start with a sample or prototype?
A clear workflow matters before production starts. For early-stage projects, photos, sketches or samples can support initial review, but a confirmed drawing is usually needed before repeatable production. For replacement parts, a sample can help explain the function, but dimensions, material and tolerance requirements should still be recorded so future batches can be controlled.
For repeat production, the goal is not just to make one acceptable part. The process should support consistent dimensions, inspection points, packing requirements and communication from batch to batch. See our prototype-to-repeat-supply guide for the drawing revisions, sample approval and inspection information to carry into the next batch.
Materials and part requirements
Common materials include carbon steel, stainless steel, brass, aluminium and other specified metals. Our CNC turning materials guide explains the information to include when specifying a grade. The right material depends on the part function, load, corrosion exposure, weight, wear, conductivity, appearance and cost. If the exact grade is not yet confirmed, it helps to explain how the part will be used and whether strength, corrosion resistance, sliding contact or weight is the main concern.
Material choice can also affect machining time, tool wear, surface finish, tolerance control and finishing processes. Harder materials, thin-wall sections, long slender shafts and fine surface finish requirements may require extra review before pricing. When plating, coating, passivation, anodising or heat treatment is required, those details should be shared early because they may affect final dimensions and packing.
What should you send for a CNC turning quote?
A clear part brief reduces back-and-forth. The most useful information is the drawing, material grade, quantity, critical dimensions, thread requirements, surface finish, treatment, sample status and expected delivery schedule. If the part is replacing an existing component, photos of the mating assembly can also help explain functional requirements that are not obvious from the part alone.
For threaded parts, include the thread standard, pitch, class, thread length and gauge requirement where possible. For bushings and sleeves, mark the internal diameter, outside diameter, wall thickness and fit surfaces. For shafts, identify critical diameters, shoulders, grooves, threads and surfaces that contact bearings, bushings or other mating parts.
Use the drawing and quotation checklist to prepare your files. Include the delivery postcode and required date so freight and timing can be reviewed with the part requirements.
Inspection and quality control
Inspection should match the function of the component. Typical inspection points may include diameter, length, shoulder position, thread fit, groove width, surface finish, burr control and appearance. Not every feature needs the same level of control, so marking critical dimensions helps keep the process practical and cost-aware.
If inspection reports, material certificates, photos or pre-shipment checks are required, they should be agreed before production. Use our turned-parts inspection guide to identify critical features and the records to agree before production.
Suitable buying situations
Forgeon is well suited to drawing-based sourcing situations such as prototype validation, replacement components, supplier comparison, repeat production planning and ongoing sourcing for custom metal parts. Typical applications include industrial machinery, hydraulic and pneumatic assemblies, agricultural and construction equipment, automation machinery, gear and transmission assemblies, and custom repair parts.
The best starting point is a drawing or sample brief. From there, material, tolerances, finish, quantity and packing can be reviewed together before sampling or batch production.