Hole Machining & Boring
PROCESS SCOPE
Hole-Making Processes We Support
Different hole requirements call for different machining methods. A drilled hole may be sufficient for clearance or general-purpose use, while a fit surface, bearing seat or alignment bore may require reaming or boring after the initial hole is created.
Drilling
For through holes, blind holes and general hole creation where the required size, depth and positional tolerance are suitable for drilling.
Reaming
Used as a finishing operation when a pre-machined hole requires improved size consistency and surface condition for a specified fit or functional requirement.
Boring
Used to enlarge or finish an existing hole while improving control of diameter, alignment or the relationship between the bore and other machined features.
Counterboring & Countersinking
For stepped seating features, recessed fastener heads and defined entry geometry around drilled holes.
Tapping & Threaded Holes
Internal threads produced according to drawing requirements, thread standard, depth and functional use.
TYPICAL FEATURES & PARTS
Typical Hole Features We Machine
Hole machining appears across many component types, from simple fixture plates to housings and machine structures with multiple precision bores. Typical features include:
- Through holes and blind holes
- Stepped holes and counterbores
- Countersunk holes
- Reamed holes for controlled fits
- Precision bores and bearing seats
- Threaded holes
- Coaxial or related bore features
- Hole patterns and locating holes
- Deep or high aspect-ratio holes where process planning is required
CAPABILITY DATA
What We Control in Hole Machining
Rotational components often depend on how multiple diameters and faces relate to a common axis. The machining plan therefore focuses on workholding, datum selection and completion of critical features in stable setups.
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Diameter & Fit Control
The finishing method is selected according to the specified hole tolerance and fit requirement. Drilling, reaming and boring are used differently depending on the drawing and functional need.
Position & Datum Relationship
For locating holes, hole patterns and bores related to machined datums, setup planning considers how hole position should be referenced to the surrounding geometry.
Depth, Chip Evacuation & Tool Access
For deeper holes or restricted access, tool length, chip evacuation, coolant access and step sequence are considered to maintain a stable machining condition.
Bore Alignment & Related Features
Where multiple bores, shoulders or seating surfaces must work together, the process is arranged to support alignment and consistent feature relationships.
Thread Quality
Thread size, depth, entry, bottom condition and inspection method are reviewed according to the drawing and application requirements.
CAPABILITY DATA
Capability Snapshot
|
Capability Item |
Website Wording / Data to Confirm |
|
Hole Diameter Range |
Drilling: Ø1–50 mm; Boring: Ø10–200 mm |
|
Hole Depth / Aspect Ratio |
Standard drilling up to 5×D; deeper holes up to approximately 10×D depending on diameter, material and tool access. |
|
Reaming / Boring Range |
Reaming: Ø3–50 mm; Precision boring: Ø10–200 mm |
|
Thread Range |
Metric threads: M2–M30; UNC / UNF and other thread standards available according to drawing requirements. |
|
Typical Hole Tolerance |
Drilled holes: typically ±0.05 mm; reamed and precision-bored holes: typically ±0.01–0.02 mm. H7 and drawing-specific fits available where applicable. |
|
Inspection |
Pin gauges, plug gauges, bore gauges, inside micrometers and CMM inspection selected according to hole size, tolerance and feature requirements. |
Have a Part With Critical Holes or Bores?
Share the drawing with hole diameters, depths, fits, positional tolerances and thread callouts clearly identified. We can review the hole-making sequence and determine the appropriate drilling, reaming, boring or threading process for quotation.
We machine a wide range of metals, engineering plastics, and selected high-performance materials for custom CNC machined parts
Contact Us
Tel: +86-769-38995488-888
Email: rfq@lairun.com.cn
WhatsApp: +86 139 2926 5752
WhatsApp: +86 136 5251 3796
Address: Room 102, 1st Floor, Building 1, No.46, Weimin Road, Dongcheng Street, Dongguan city, Guangdong Province, China