GP Drill series
One-shot machining and IT8
grade hole diameter accuracy with
our PCD drill series!
- Optimal tool specifications for each material shape,
from w/o preholes to casted holes!
- IT8 class one-shot finishing
- High accuracy, long life and high-speed machining with PCD edges
- Reduce tooling costs by reducing the number of used tools
WHAT IS GP Drill series?
① GP Drill
For w/o prehole
Feature: high-precision machining with PCD edges
- PCD edge: 2
- Accuracy: IT8
- Surface roughness: ≤ 3.2z
- Roundness: ≤ 8µm
② GPT Drill
For casted hole
Feature: Stable machining with casted holes
- PCD edge: 3
- Accuracy: IT8
- Surface roughness: ≤ 3.2z
- Roundness: ≤ 8µm
“Amazing Ideas / Facts!”
The GP drill series uses PCD as the cutting edge material.
It has high welding resistance against aluminum and enables stable machining accuracy even in one-shot machining.
Our line-up includes a 2-edge GP drill for w/o prehole drilling and a 3-edge GPT drill for casted hole drilling.
By using the GP Drill Series, one can reduce machining time and tool costs in processes that conventionally require two steps.
High Precision with Diamond EdgesGood !
Process Time ReductionGood !
Cost Reduction
Good !
POINT!
Different number of cutting edges for machining w/o preholes or casted holeExcellent !
Background / Point for Development
Background
- With conventional carbide tools, one-shot machining was difficult due to the problem of aluminium welding onto the cutting edges.
- The development of net-shape casting technology has increased the number of workpieces with casted holes in the industry. 2-edged GP drills however, had problems with inconsistent accuracy from machining the casted holes.
Point for Development
- The GP drill with PCD edges, which have high resistance to aluminum welding, provides stable accuracy in one-shot machining.
- The GPT drill has 3 PCD cutting edges, which is apt for achieving more stable accuracy in machining casted holes.
Examplew/o prehole
| Tool | GP drill |
|---|---|
| Workpiece | Aluminum block |
| Material | ADC12 |
| Tool Diameter | ø10mm |
| Cutting Conditions |
|
| Required accuracy |  |
|---|
Hole Diameter
Surface Roughness
Roundness
ExampleCasted Hole
| Tool | GPT drill |
|---|---|
| Workpiece | Aluminum block |
| Material | ADC12 |
| Tool Diameter | ø10mm |
| Cutting Conditions |
|
| Required accuracy |  |
|---|
Hole Diameter
Position
Roundness
Product Specification
GP drill
Tool Specification
| Process covered | knock holes, plug holes Aluminum high-precision holes / w/o preholes *One-shot machining from plain/solid material |
|---|---|
| Diameter | ø5 - |
| Standard conditions |
|
| Performance | IT8 |
Example of applicable work
GPT drill
Tool Specification
| Process covered | knock holes, plug holes Aluminum high-precision holes / w/o preholes *One-shot machining from plain/solid material |
|---|---|
| Diameter | ø6 - |
| Standard conditions |
|
| Performance | IT8 |
Example of applicable work
