GB tool
(Guide-pad Boring Tool)
The definitive version of hole machining!
High-precision boring with a machining center
Boring holder with optimal guide pad
Cutting force optimized guide pad arrangement
Easy operation for fine adjustment
Dedicated setting gauge also provided
Amazing facts!
── Introducing ideas and technologies ──
The GB tool consists of 2 leading edges and 1 finishing edge.
The optimal guide pad arrangement, which matches the cutting resistance, self-guides the self-machined hole to achieve excellent roundness and straightness during the boring machining of the bore hole on a machining center.
Furthermore, the unique fine-tuning mechanism enables easy setting.
GB tool configuration
Processing steps
① Hole entry (mouth) processing with short tool
② Deep hole processing with long tool
This is the point!
Optimal guide pad placement for cutting resistance
Excellent!
Cutting resistance build-up
↓
Guide pad supresses tool displacement
↓
Stable machining accuracy
This is the point!
Fine adjustment with easy operation - Single action type leading edge
Excellent!
Adjustment method
① Fix the insert with the clamping screw
② Adjust the diameter with the diameter adjustment screw
This is the point!
Fine adjustment with easy operation -
Double action type finishing edges
Excellent!
Adjustment method
① Fix the insert with the clamping screw
② Adjust diameter with the diameter adjustment screw
③ Adjust backtaper with the backtaper adjustment screw
Dedicated setting gauge
- Leading edge: cutting edge diameter adjustment
- Finishing edge: cutting edge and back taper adjustment
Development / product concept
“Current status and challenges”
- In order to reduce investment and support high-mix multi-product production, it was necessary to shift from a specialized machine to a general-purpose machine.
- However, the general-purpose machine had problems with positioning and straightness, because it did not have the support of a dedicated machine when machining a bore hole
“Development points”
- “GB TOOL” self-guides the machined hole using an optimal arrangement of guide pads, thereby reducing displacement of the cutting edge and enabling high-precision drilling on general-purpose machines, thereby realizing “investment reduction” and “multi-product” compatibility.
Processing example
Tool name
GB tool (guide pad boring tool)
Machining work
Work material
JIS AC2C-T6 / ISO Al-Si5Cu3Mn
Tool diameter
ø26 mm
Cutting conditions
Spindle speed: S = 2957 min-1
Cutting speed: Vc = 260 m/min
Feed: f = 0.1 mm/rev
Coolant
Internal coolant (emulsion 10%)
Machining accuracy
Satisfies the required accuracy
Roundness: 3 µm
Coaxiality: 5 µm
(see right)
Required accuracy
Roundness / coaxiality
Roundness: 3 µm
Coaxiality: 5 µm
Specification
- Tool specifications
Tool name
GB tool (guide pad boring tool)
Standard conditions
Cutting speed: Vc = 200-300 m/min
Feed: f = 0.1-0.2 mm/rev
Internal coolant supply
Required coolant concentration: 5% or more
Compatible diameter
ø16 mm and up (single action)
ø22 mm and up (double action)
max ø50 mm
- Application examples
Applicable processes
Cylinder head cam hole, steering housing
Applicable materials
Aluminium (high volume production) or cast iron (low volume / prototype production)
Concentricity
8 µm
Surface roughness
3.2 Rz
Processing diameter
IT7
