Ultra-Small Hole Drilling
Holes under 1 mm produced by milling, down to a minimum diameter of 0.05 mm with surface roughness reaching Ra0.8.
- ServiceUltra-Small Hole Drilling
- RouteTurn-key, in house
- Works fromYour drawing
- Quality systemISO 9001:2015
Or email [email protected] and call +86-760-22822128.
Overview
This is the service HPM is built around. Holes with a diameter under 1 mm are machined by milling rather than by conventional drilling, the minimum diameter is 0.05 mm and the surface roughness reaches Ra0.8. The service has been supplied for printing nozzles, optical fiber connectors, high pressure mist nozzles and other fields that need very smooth micro holes.
Key Benefits
Down To 0.05 mm Diameter
The minimum hole diameter is 0.05 mm, produced by milling rather than by conventional drilling.
Ra0.8 Inside The Bore
Surface roughness reaches Ra0.8, which is what matters when the hole is a flow path rather than a clearance hole.
Published Tolerance Bands
Diameter tolerance is offered in general, medium and high grades, with the achievable length to diameter ratio stated for each diameter band.
Who It Is For
- Printing nozzle manufacturers
- Optical fiber connector manufacturers
- High pressure mist nozzle manufacturers
- Any field that needs very smooth micro holes
Problems It Solves
- Holes below 1 mm that conventional drilling cannot produce repeatably.
- Micro holes that meet the diameter but leave a bore too rough for a flow application.
- Suppliers who will quote the part but subcontract the one feature that matters.
Applications
- Printing nozzles
- Optical fiber connectors
- High pressure mist nozzles
- Micro flow and spray components
Capability Chart
Achievable diameter, length to diameter ratio and diameter tolerance by grade.
| Tolerance Of Diameter (mm) | ||||
|---|---|---|---|---|
| Diameter (mm) | Ratio of L/D | General | Medium | High |
| <0.1 | 5 | ±0.01 | ±0.005 | ±0.002 |
| 0.1~0.2 | 7 | ±0.01 | ±0.005 | ±0.002 |
| 0.2~0.3 | 10 | ±0.01 | ±0.005 | ±0.002 |
| 0.3~0.5 | 15 | ±0.01 | ±0.005 | ±0.002 |
Tolerance of diameter in mm. Figures are taken from the HPM ultra-small hole drilling capability chart.
- Minimum diameter 0.05 mm
- Holes under 1 mm produced by milling
- Surface roughness reaching Ra0.8
- General, medium and high tolerance grades
Quality Control On This Route
The quality concept is the core and the most important factor behind the level of precision machining service HPM can offer.
- Material The grade and the chemical composition must comply with what the drawing requires.
- Dimension Every dimension must comply with the tolerance the drawing specifies.
- Treatment Every treatment must comply with the standard the drawing specifies.
HPM is an ISO 9001:2015 quality management system certified factory.
How To Order
From Drawing To Delivery
- 1
Email your drawing to in PDF, DWG or STEP. The mailbox is checked for quotations 24 hours.
- 2
Tell us the quantity, the material grade, the tolerance that matters and any surface or heat treatment the drawing calls for.
- 3
We review the drawing against our equipment and come back with the price and the lead time.
- 4
On approval we machine a first article and check it on material, dimension and treatment before the run starts.
- 5
The run is produced, inspected in the measuring room and shipped, with treatment handled inside the same order.
Related Services
Swiss Turning
Sliding head turning for long slender parts and small diameter work that has to hold its tolerance along the whole length.
View Service →
CNC Turning
Turned parts made to drawing, from single prototypes through to repeat production runs.
View Service →
CNC Milling
Milled blocks, plates, manifolds and profiled components machined to your drawing.
View Service →
Grinding
Grinding as the finishing step where a turned or milled surface alone will not meet the drawing.
View Service →Ultra-Small Hole Drilling FAQ
What Is The Smallest Hole You Can Machine
The minimum diameter is 0.05 mm. Holes with a diameter under 1 mm are machined by milling rather than by conventional drilling, and the surface roughness reaches Ra0.8.
What Diameter Tolerance Can You Hold
Diameter tolerance is offered in three grades: general at ±0.01 mm, medium at ±0.005 mm and high at ±0.002 mm, across the diameter bands from under 0.1 mm up to 0.5 mm.
Do You Quote Ultra-Small Hole Drilling From A Drawing
Yes. Send the drawing with the quantity and any treatment requirement and we come back with the price and the lead time. We do not machine to a standard house specification.
Can This Be Combined With Other Operations
Yes. HPM offers turn-key services, so this operation can be combined with turning, milling, wire cut, grinding, plating, anodizing, painting, hardening, carburization and nitriding inside one order.
What Is Checked Before The Parts Ship
Three things, all against your drawing: the material grade and chemical composition, every dimension against its tolerance, and the treatment against its standard.
Is The Factory Certified
HPM is an ISO 9001:2015 quality management system certified factory.
Get A Quotation On Ultra-Small Hole Drilling
Email the drawing, the quantity and the treatment requirement. We answer with the price and the lead time.