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GMO micro hole deburring tool components
GMO

GMO Micro Hole Deburring Tool

German-patented (DE 103 57 404) micro hole deburring system. Front and back deburring in a single step for hole diameters from 0.8 mm to 7.5 mm. Carbide blades, modular and economical.

  • Deburring very small holes from 0.8 mm
  • Front and back deburring in a single step
  • Replaceable carbide blades — long life, low cost
  • Fast deburring in series production
  • CNC and drill press compatible

Overview

What is GMO?

The GMO tool was developed for simple and reliable deburring of the inner edges of drilled holes. It is possible to deburr just the inner edge or both edges in a single step. Burrs from intersecting holes can also be easily removed. The method is protected by German patent number 103 57 404.

  • Adjustable hole diameter range from 0.8 mm to 7.5 mm
  • Very fast deburring process — ideal for series production
  • Easy blade replacement — low cost with replaceable consumables
  • Robust and slim design — works on any machine

Components

GMO System Components

The GMO system consists of four main components: holder, insert, blade and spring. Each component is selected based on the application.

1 — Holders

Holder Types

3 different holder types are available:

  • Standard — general-purpose use
  • Standard (with clamping surface) — more secure clamping
  • XL — for use with stronger springs
GMO XL holder
GMO XL holder

2 — Inserts

Insert Selection Table

The insert is mounted on the holder. It has an alignment channel for blade placement. As hole diameter increases, the channel moves further from the center axis.

GMO insert types — hole diameter ranges from E00 to E25
GMO insert types and hole diameter ranges
Insert TypeHole Diameter (mm)
E000.8 – 2.5
E052.5 – 3.5
E103.5 – 4.5
E154.5 – 5.5
E205.5 – 6.5
E256.5 – 7.5

3 — Blades

Blade Types and Selection

Blades are replaceable consumables. Durability depends on the material being machined (approximately 5,000 parts in average hardness steel). Three different forms are available:

  • Normal form — single-edge sharp, inner edge deburring only
  • Special form /B — double-edge sharp, inner and outer edge deburring
  • Special form /25 — for cross-drilled holes into narrow bores
Blade TypeHole Diameter (mm)
S080.8 – 1.0
S101.0 – 1.2
S121.2 – 1.5
S151.5 – 2.0
S202.0 – 2.5
S232.5 – 7.5

Application-specific blade forms can also be manufactured on request.

4 — Springs

Spring Selection Table

8 different spring types are available: 4 for standard holders, 4 for XL holders. Correct spring selection is critical for deburring success.

Spring TypeSpring ForceHolder
F40LowStandard
F50MediumStandard
F55StrongStandard
F63Extra strongStandard
F63LowXL
F80MediumXL
F90StrongXL
F100Extra strongXL

Videos

GMO Application Videos

Deburring Operation

Stationary Part Deburring

Spring Replacement

Blade Replacement

Documents

Downloads

Related Products

See Also

Looking for a solution to your micro hole burr problem?

Let us help you select the right GMO configuration based on your hole diameter and material.

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