Precision Machining of Advanced Materials
Multi-Hole Machining

Ultra-High-Precision Hole Machining
with Accuracy up to ±0.003
Supporting up to 5,000 Holes

Many components require hole machining, and in the field of machining it is no exaggeration to say that hole machining is a fundamental process.
For products with a large number of holes, even a single defective hole can result in the entire product being rejected, making stable machining an absolute requirement.
At Top Seiko, we measure the load applied to cutting tools to quantify machining stress, and use this data to develop appropriate tools and establish optimal machining conditions.

Overview of Machining Technology

Machinable Materials: Ceramics, Quartz Glass, Heat-Resistant Glass, Silicon, Machinable Ceramics, Molybdenum, Tungsten, Tantalum, and more.
Hole Types: Hole Diameter: Micro, Small, Medium, Large
Hole Depth: 0.05 – (Max) 400 mm
Hole Shape: Standard, Tapered Holes, Square Holes, Threaded Holes
Accuracy: ±0.003 – 0.1
Machining Equipment: Machining Centers:
3-Axis Machining Centers (Center-Through Specification)
High-Speed Spindle Linear-Drive Machining Centers
5-Axis Machining Centers (Center-Through Specification)
Multi-Tasking Lathes
Small-Hole EDM Machine
Wire EDM Machines
Tool Materials: Carbide, Diamond Grinding Wheels, Single-Crystal Diamond, Compax (Polycrystalline Diamond), Diamond Coating

Typical Machining Capability by Material

Machinable Ceramics

Hole Diameter (mm)	Maximum Hole Depth (mm)	Hole Accuracy (mm)	Maximum Number of Holes
0.05–0.1	Hole Diameter × 10	±0.005–±0.01	100–5,000
0.1–0.2	Hole Diameter × 10	±0.005–±0.02	5,000
0.2–1.0	Hole Diameter × 20	±0.005–±0.02	5,000
1.0–	Hole Diameter × 30	±0.005–±0.05	5,000

Even when machining is difficult with materials such as alumina, machinable ceramics often provide excellent machinability and may allow manufacturing to be possible.
Depending on the customer’s operating conditions, these materials can be fully suitable for use.

Machinable ceramics are produced by multiple manufacturers in a wide variety of compositions, and their properties vary significantly.
There are many cases where switching to machinable ceramics has successfully solved machining challenges.

Quartz Glass · Heat-Resistant Glass・Silicon

Hole Diameter (mm)	Maximum Hole Depth (mm)	Hole Accuracy (mm)	Maximum Number of Holes
0.05-0.1	Hole Diameter × 10	±0.005-±0.01	10-200
0.1-0.2	Hole Diameter × 10	±0.005-±0.01	200-500
0.2-0.4	Hole Diameter × 20	±0.005-±0.05	500-2,000
0.4-1.5	Hole Diameter × 30	±0.01-±0.05	2,000-5,000
1.5-	Hole Diameter × 30	±0.01-±0.05	5,000

Alumina, Aluminum Nitride

Hole Diameter (mm)	Maximum Hole Depth (mm)	Hole Accuracy (mm)	Maximum Number of Holes
0.05～0.1	穴径×10倍	±0.005～±0.01	50
0.1～0.2	穴径×10倍	±0.005～±0.02	50～100
0.2～0.4	穴径×20倍	±0.005~±0.05	100～500
0.4～1.5	穴径×30倍	±0.005～±0.05	500～3,000
1.5～	穴径×30倍	±0.005～±0.1	500～3,000

Silicon Carbide, Zirconia, Silicon Nitride

Hole Diameter (mm)	Maximum Hole Depth (mm)	Hole Accuracy (mm)	Maximum Number of Holes
0.1-0.3	Hole Diameter × 10	±0.01-±0.05	20
0.3-0.5	Hole Diameter × 10	±0.01-±0.05	50
0.5-1.5	Hole Diameter × 20	±0.01-±0.05	50-100
1.5-	Hole Diameter × 20	±0.01-±0.05	200

Molybdenum, Tantalum

Hole Diameter (mm)	Maximum Hole Depth (mm)	Hole Accuracy (mm)	Maximum Number of Holes
0.05	Hole Diameter × 10	±0.005-±0.01	100
0.05-0.2	Hole Diameter × 10	±0.005-±0.01	100-500
0.2-2.0	Hole Diameter × 20	±0.01-±0.05	500-3,000
2.0-	Hole Diameter × 30	±0.01-±0.05	3,000