Precision CNC-Machined Parts with Surface Treatments Included

CNC Milling

Multi-axis CNC milling for parts with complex faces, pockets and features. Ideal for housings, brackets, manifolds and covers.

• High-precision machining on vertical and 5-axis mills
• Suitable for aluminium, steels, copper alloys and plastics
• Good for prototypes, jigs and low-volume batches
• Machined directly from your 3D model and drawings

CNC Turning

CNC turning for shafts, spacers, threaded adaptors and other rotational parts, with grooves, radii and cross-holes as required.

• Standard and multi-axis turning options
• Internal and external threads, grooves and undercuts
• Ideal for hydraulic/pneumatic adaptors and bushings
• Parts supplied finished and ready to assemble

Rapid Prototyping & Small Batches

When you’re proving out a new design, LeanLine can organise fast-turn prototypes and short runs, including cosmetic finishes.

• Concept and functional prototypes
• Design feedback on manufacturability & tolerances
• Flexible order quantities – from single pieces upwards
• Shipping coordinated directly to your workshop or site

Metals & Plastics

A broad range of machinable metals and plastics are available for CNC milling and turning.

Tolerance Approach

Not every surface needs the same level of accuracy. We focus tight tolerances where they matter – seal lands, bores, shaft fits and mounting interfaces – and relax non-critical faces to keep costs controlled.

• Tight machining on critical features where fits and sealing are important.
• General surfaces guided by standard machining tolerances for cost-effective production.
• Tolerance review as part of quoting – we’ll flag dimensions that may drive cost or risk.
• Inspection reports available on request for key dimensions.

Anodising & Passivation

For aluminium and stainless components that need protection and a clean, consistent appearance.

• Decorative and hard anodising in a range of colours
• Passivation of stainless steels to boost corrosion resistance
• Ideal for covers, brackets, manifolds and decorative parts

Coatings & Plating

Coatings improve appearance and protect against abrasion, corrosion and handling damage.

• Powder coating and wet painting in various colours
• Electroplating options such as nickel or chrome
• Black oxide on suitable steels for a low-glare finish

Preparation & Heat Treatment

Additional processes are available where strength or surface texture are important.

• Media blasting and brushing for consistent matte surfaces
• Polishing for smooth, highly finished surfaces
• Heat treatment for steels where hardness or strength is needed

1. Define & Quote

• You send drawings, 3D models and any tolerance notes.
• We review material, tolerances and finishes and come back with questions if needed.
• You receive a quote including machining, finishing and freight to your address in NSW.

2. Manufacture & Delivery

• Parts are machined and finished at our partner factory using modern CNC equipment.
• Inspection is carried out on critical dimensions; reports can be provided on request.
• Shipments are consolidated and delivered directly to your workshop, site or customer.

For New Parts or Prototypes

• Export or save your 3D model (STEP/IGES) and 2D drawing (PDF).
• Note materials, quantities and any special tolerances.
• Decide what surface treatment you want (e.g. anodised black).
• Send everything through using the form below or directly by email.

For Existing Parts or Reverse Engineering

• Take clear photos of the part, including any critical features.
• Measure key dimensions (overall size, hole centres, threads, thicknesses).
• Tell us what the part does and where it fits so we can sanity check the design.
• We’ll advise whether a simple sketch is enough or if we need a full drawing or 3D model.

Warranty Summary

• Scope. We warrant that parts supplied by LeanLine Engineering will be manufactured to the agreed drawings and specifications, using the agreed materials and finishes.
• Duration. The warranty applies for 12 months from the date of delivery for defects in workmanship or material that existed at the time of supply.
• What is covered. Dimensional errors, machining/finishing defects or incorrect material supplied where we are responsible.
• What is not covered. Design errors in customer drawings or models, incorrect or incomplete information supplied to us, normal wear, corrosion from service environment, accidental damage, misuse, modification, or installation that doesn’t follow good engineering practice.
• Remedy. Our obligation under this warranty is limited, at our option, to repair, rework, or remake the affected parts, or to credit or refund the original invoice value of those parts. We are not responsible for consequential or indirect losses (downtime, lost production, etc.).

Returns & Non-Conformance

• Custom parts – no change-of-mind returns. Because machining work is made-to-order, we cannot accept returns where requirements change after production or where parts are no longer required.
• Notifying an issue. If you believe there is a problem with workmanship, notify us within 7–14 days of delivery (set your preferred timeframe) with photos, a description of the problem and the relevant drawings.
• Inspection process. We may request that parts are returned for inspection. We will issue a return number and shipping instructions where necessary.
• If we are at fault. If inspection confirms a manufacturing or finishing issue, we will repair, rework or remake the parts at our cost, or apply a credit/refund, and we will cover reasonable return freight.
• If the issue is design or information related. Where the issue arises from the drawing/model, specification or information supplied to us, we will advise options and can quote to rework or remake parts based on corrected information.