Accuromm Central Europe

A tool engineering company that supports all work related to tools

Products / Services
Rotary tool: Holder
Boring holder

G-one holder

PATENT PENDING

One shot processing
Investment cut
JTA 2021-020

Overcome the weak points of a multi-edge boring cutter!

One-shot machining by special construction for the role of the cutting edge

Boring holder for high-precision and efficient machining

45% less setup time by not requiring any edge runout adjustment

20% cost reduction by using standard inserts

Improved machining accuracy with a single edge

One shot processing
Investment cut
JTA 2021-020
Catalog PDF

Amazing facts!

── Introducing ideas and technologies ──

The G-one holder consists of multiple roughing and finishing edges.
By dividing the role of each cutting edge function and using a single finishing edge with standard inserts, the G-one holder reduces setting time compared with conventional products and does not rely on the skill of the operator.
High productivity, high-precision machining and reduced costs are achieved.

Reduced setup time

Good!

Cost reduction

Good!

20% reduction in tooling cost​ by utilizing standard inserts

This is the point!

The role of the cutting edge is divided by function

Excellent!

Development / product concept

“Current status and challenges”

  • In high-precision hole drilling of aluminium workpieces, ‘one-shot machining’ from the material hole by using multi-edge tools has been established with the aim of increasing cycle time through process reduction from conventional rough and finish machining.
  • However, new issues have to be addressed at the production site, such as long cutting edge setup time due to multi-edge machining, unstable machining accuracy due to edge run-out, and high costs for special inserts.

“Development points”

  • The “G-one holder” solves these problems by integrating multiple cutting edges with different roles and properties into a single holder, and also achieves high accuracy, high efficiency and low cost, comparable to conventional machining.

Processing example

Tool used

G-one holder

Machining work

Transmission case / Bearing hole

Work material

JIS ADC12 / ENAC-AlS11Cu2(Fe)

Tool diameter

ø74 mm

Cutting conditions

Spindle speed: n = 10000 min-1
Cutting speed: Vc = 2325 m/min
Feed: f = 0.15 mm/rev

Required
accuracy

Diameter removal allowance 1.0 mm (max 1.3 mm depending on the draft angle) End face removal allowance 4.0 mm

Hole diameter variation

Variation: 5 μm

Roundness

Roundness 3.0 μm

Surface roughness

Surface roughness Ra 1.4 μm

Product specification

  • Tool specification

Tool name

G-one holder

Target process

Aluminium high-precision boring process (one-shot material processing)

Setting diameter

ø55 mm ~

Standard conditions

Spindle speed: n = 10 000 min -1
Feed: f = 0.1~0.15 mm/rev

Machining accuracy

Hole diameter: IT7 grade
Roundness: 5 μm

  • Example of applicable work

Corner relief

Corner radius

Corner relief or corner radius in through hole

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