Process · Drilling
Precise holes, reaming and threads with controlled position, diameter and depth — the difference between a hole that clears a bolt and one that locates a bearing.
Holes look simple but carry tight requirements when they locate, seal or thread. We drill, ream and tap with position and diameter held to the drawing, and flag depth and spacing limits during DFM.
Capabilities at a glance
| Parameter | Range |
|---|
| Operations | Drilling · reaming · tapping · thread milling · counterbore |
| Position tolerance | ≈ ±0.1 mm drilled · ±0.02 mm reamed |
| Depth | to ~5x dia standard; deep-hole drilling beyond |
| Threads | Metric & imperial, tapped or thread-milled |
Design for holes
- Keep holes at least one diameter from edges and from each other.
- Limit blind-hole depth and note where a flat bottom is required (it needs a special tool).
- Ream or specify tolerance only where a hole locates or seals — not on clearance holes.
Combined with milling and turning in the same setup wherever possible.
Frequently asked questions
What hole position tolerance can you hold?
Drilled holes are typically held to about ±0.1 mm position; reamed holes reach ±0.01–0.02 mm diameter and tighter position when location matters.
How deep can you drill?
Standard drilling goes to about 5x diameter easily; deeper holes (deep-hole drilling) reach much higher depth-to-diameter ratios with special tooling and pecking to clear chips.
Do you cut threads?
Yes — tapping for metric and imperial threads, plus thread milling for large or precise threads. Specify the thread class only as tight as the fit needs.
Reamed or drilled holes?
A drilled hole is fine for clearance; when a hole locates a pin or bearing, it is drilled undersize then reamed to a precise diameter and finish.
