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GHI Reamer Series

Excellent finishing accuracy Carbide reamer series for cast iron and steel

Unequal spacing 6 edges for high-precision,
high-efficiency machining

  • Excellent roundness by optimum unequal spacing
  • Excellent surface roughness by 6 edges
  • Highly efficient machining with high feed rate
Products & ServicesRotary Tools: Drilling ToolsFor Cast Metal/Steel GHI Reamer Series

WHAT IS GHI Reamer series?

①GHI Reamer

For general finishing

Feature:6 Edges with unequal division. High-precision machining

  • Accuracy: IT7
  • Roundness: ≤ 10µm
  • Surface roughness: ≤ 12.5z

②GHI Reamer Type.T

For thin-walled workpieces

Feature: Low-resistance machining with right-hand twisting

  • Accuracy: IT7
  • Roundness: ≤ 10µm
  • Surface roughness: ≤ 12.5z

③GHI Reamer Type.R

For through-hole

Feature:Improved through-hole chip evacuation with left-hand twisting

  • Accuracy: IT7
  • Roundness: ≤ 10µm
  • Surface roughness: ≤ 12.5z

“Amazing Ideas / Facts!”

The GHI Series Reamers for cast iron and steel:

  • Excellent roundness and surface roughness due to the optimized unequal spacing 6 cutting edges.
  • Highly efficient machining at high feed rates contributes to shorter cycle times.
  • Type T for thin-wall and Type R for through-hole are also available.
 

Outstanding roundness

Excellent surface roughness

Type.T (right-hand twisting) Reduced cutting resistance (thrust)

Type.R (left-hand twisting) Improved chip evacuation

POINT! Machining accuracy by the 6 unequally cpaced edges, the optimal edge profile and the coating.

Background / Point for Development

Background

  • High feed operation with conventional multi-flute reamers often results in bad roundness and roughness.

Point for Development

  • The optimized unequal spacing 6 cutting edges significantly improves roundness.
  • The back taper suitable for high feed machining improves surface finish.
  • The multi-layer coating contributes to lower tooling costs by extending tool life.

Example

ToolGHI reamer
GHI reamer Type.T
GHI reamer Type.R
WorkpieceTest piece
MaterialFC250
Tool Diameterø10mm
Cutting Conditions
  • Cutting speed: V=100m/min
  • Cutting feed: f=0.5mm/rev
Portion 

Roundness

Required
accuracy
  • GHI reamer, GHI reamer Type.T

Surface Roughness

Product Specification

GHI reamer

Tool Specification

Feature
  • Easy operation
  • Collet replacement for multiple products
  • Long life design
ApplicationTurning/grinding, measurement
Extension volumeøD×0.003mm
(ø0.06 extension in case of ø20)
Runout accuracyWithin 5 µm
RepeatabilityWithin 1 µm
Chucking Diameterø8 – ø200

GHI reamer Type.T

Tool Specification

Process coveredFC/FCD/steel hole
Diameterø6 – 20
Standard
conditions
  • Cutting speed: V=30 – 100mm/min
  • Cutting feed: f=0.2 – 0.6mm/rev
PerformanceIT7

GHI reamer Type.R

Tool Specification

Process coveredFC/FCD/steel hole
Diameterø6 – 20
Standard
conditions
  • Cutting speed: V=30 – 100mm/min
  • Cutting feed: f=0.2 – 0.6mm/rev
PerformanceIT7

Example of applicable work