CNC Milling

CNC Milling & Boring

Milling and Boring Services Covered at W&K Precision

W&K Precision Engineers delivers CNC milling and boring services from its Driffield facility in East Yorkshire. Our machining centres handle 3-axis milling of complex prismatic components, deep bore operations and face milling across a wide range of metals and engineering plastics. Tolerances to ±0.01mm are achievable on milled features, and we accept work from both 2D drawings and 3D CAD models.

3-axis CNC milling of prismatic and profiled components
Deep boring and fine boring to tight tolerance grades
Tolerances achievable to ±0.01mm on milled features
Face milling, pocket milling and contour machining available
Steel, stainless, aluminium, brass, bronze and engineering plastics
In-house CAD/CAM programming from drawings or 3D models
Full material traceability and inspection documentation available
Batch sizes from single prototypes through to production runs

W&K Precision's milling and boring department handles components requiring flat surfaces, angled faces, stepped pockets, drilled and tapped holes, and precision bores. Whether you need one custom part or a batch of identical components, send your drawings to our Driffield workshop for a prompt quotation.

CNC milling machine cutting a complex aluminium workpiece

Milling and Boring Capability at Cranswick Industrial Estate

Our CNC milling centres handle three-axis machining of prismatic components with features including pockets, slots, bores, counterbores, tapped holes, radii and contoured profiles. In-house CAD/CAM programming from customer drawings or 3D models allows complex parts to be machined accurately from the first component, reducing costly scrap and rework. Components are held in purpose-made fixtures and jigs where needed to ensure positional accuracy and repeatability across production batches.

Boring operations produce accurately sized cylindrical bores in housings, machine blocks, fabricated frames and weldments. Fine boring achieves close tolerance fits for bearing housings, bush bores and seal seats where press or transition fits are critical. W&K Precision handles boring of new components alongside repair boring of worn housings where the original bore has become oversized through wear or damage. All common engineering metals are catered for, and inspection is carried out using calibrated instruments and, where specified, CMM equipment.

W&K Precision Cnc Milling workshop facility

Milling Services for Tooling, Jigs and Fixtures

Production tooling, jigs, fixtures and setting gauges all require the dimensional accuracy that CNC milling provides. Milled components used in assembly, welding or inspection operations must themselves be accurate to ensure the parts produced with them meet specification. W&K Precision regularly machines tooling elements for manufacturers across East Yorkshire, including plates, brackets, guides, stops and clamping components produced to customer drawings.

W&K Precision Cnc Milling sector applications

Milling and Boring for Maintenance and Repair

Machine housings, gearbox casings and structural components that have sustained wear or damage sometimes require remachining to restore precision surfaces and bore dimensions. CNC milling and boring can restore worn bearing pockets, damaged faces and out-of-tolerance features to original specification. W&K Precision handles repair machining alongside new component manufacture, and many clients bring worn parts for assessment before deciding between repair and replacement.

W&K Precision Cnc Milling small batch prototype

Why Manufacturers Trust W&K Precision for Milling

3-Axis Machining of Complex Prismatic Parts

Complex prismatic components with multiple pockets, bores, slots and profiled surfaces are machined in our CNC milling department to drawing tolerances. Multi-feature parts are programmed comprehensively from the outset, so each feature's position, size and surface condition meets specification without repeated setups and the positional errors they introduce.

Boring to Fit for Bearing and Seal Applications

Fine boring to achieve specific bore fits, from running clearances to interference fits for bearing installation, demands consistent tool path control and reliable measurement. W&K Precision bores housings and blocks to H7, H6 and other standard tolerance grades as specified, with bore gauges and calibrated instruments used to confirm the finished diameter before despatch.

Repair Milling Alongside New Component Manufacture

The ability to handle both new component manufacture and repair milling at the same facility reduces the number of suppliers a maintenance department needs to manage. Worn faces, damaged keyways, oversized slots and reworked bores are all addressed in the same workshop that machines new replacement parts, cutting coordination effort for engineering teams.

CNC milling centre at W&K Precision, Driffield

Frequently Asked Questions

CNC milling removes material using a rotating multi-flute cutting tool to produce flat surfaces, pockets, slots, profiles and contoured features. Boring, by contrast, uses a single-point cutting tool to enlarge and true up an existing hole to a precise diameter and surface finish. While both operations are performed on machining centres, boring is typically used where a hole needs to meet a specific tolerance class, such as H7 for a bearing housing, rather than simply being drilled to an approximate size.

Dimensional tolerances achievable with CNC milling depend on feature size, material, tooling condition and fixturing quality. In general, milled features can be held to tolerances of ±0.01mm or better on suitable machines and with appropriate cutting conditions. Positional tolerances between features depend on the datum strategy and how the component is fixtured. All tolerance requirements should be clearly annotated on the drawing so they can be assessed and confirmed before quoting begins.

CNC milling can start from solid bar, plate, casting, forging or a pre-machined blank depending on what the component requires. Starting from solid is common for one-off or small-batch parts. Where a casting or forging is provided as the starting point, the milling operation machines all specified surfaces to final dimension and finish, leaving any unmachined areas as cast or forged. The material type and starting condition should be described at the enquiry stage.

Worn bearing housings and bores can often be restored by reboring to the next oversize, then fitting an oversize bearing or bush, or by sleeving the bore. The appropriate approach depends on how much the bore has worn and what fits are required in service. An assessment of the worn component is usually the starting point before a repair strategy is agreed. Bringing the worn part for measurement is the best first step where the extent of wear is uncertain.

Fixturing determines how accurately a component can be held during milling and how well positional tolerances between features can be achieved. Standard vices, angle plates and clamps are used for straightforward components. For complex or repetitive parts, dedicated fixtures may be made to ensure consistent location between setups. The programming team specifies the datum strategy based on the drawing requirements, and fixture design is discussed with the customer when bespoke tooling is needed.

CNC milling is compatible with most engineering metals, including mild steel, alloy steel, stainless steel, aluminium, brass, bronze, copper and titanium. Engineering plastics such as nylon, acetal and UHMWPE can also be milled on appropriate machines with suitable tooling. Material hardness affects cutting parameters, tool life and surface finish, so harder materials require lower speeds, appropriate grade tooling and, in some cases, coolant management to maintain dimensional stability during cutting.

Surface treatments such as anodising, plating, coating and heat treatment are available through subcontract arrangements. Where a surface treatment forms part of the component specification, it should be included on the drawing or discussed at the enquiry stage. In some cases, final milling dimensions are adjusted to account for the thickness of the applied treatment, particularly where coating is applied inside a bore or on a sealing surface. W&K Precision can coordinate subcontract processing on request.

Dimensional inspection documentation, including first-article reports and batch measurement records, is available on request. Inspection is carried out using calibrated instruments and, where specified, CMM equipment to verify critical dimensions against the drawing. Material certificates and traceability documentation are also available for applications where material compliance needs to be evidenced. These records are most commonly requested by clients in oil and gas, food processing and other regulated sectors where documentation forms part of the quality record.

Request a Milling and Boring Quotation

Send your drawings or CAD models to W&K Precision Engineers in Driffield for a fast, competitive quotation. Call 01377 271041 or email wk.wkprecision@gmail.com. Our team handles milled and bored components for clients across East Yorkshire and the wider region.