NISHIKEN Inc. / GOAL CO., LTD.CATALOG DOWNLOAD
World's first technology
No more internal cooling!
Crea Borer is an innovative drill which has world's first technology for deep hole drilling.
- 20 L/D deep hole drilling (through and blind)
- no internal cooling required
- single pass drilling
- high accuracy
Crea Borer would be the best solution for your deep hole drilling process.
Pumping flute structure
During the process, an unique flute structure works like a pump and it enables coolant to enter into the hole from the outside. It takes the heat out at the machining point and it's taken out together with chips. This heat control cycle is why Crea Borer doesn't require internal cooling for precise deep hole drilling. And it means Crea Borer enables gun drilling on most of vertical CNC milling machines in your factory.
[http://www.ykt-europe.de/fileadmin/creaborer/pumping_flute.mp4]
Chip discharging
conventional drill:
tangled chips
Crea Borer:
tornado chip
Crea Borer creates unique curly chips continuously during the process. But once the chip reaches a length depending on rpm of Crea Borer, it's automatically cut off by centrifugal force and taken away without giving any damage to the workpiece or tangled around Crea Borer.
High accuracy
| drill | internal cooling | pass | |
|---|---|---|---|
| 1 | carbide | yes | single |
| 2 | HSS +carbide reamer | no | multi |
| 3 | HSS *broken | no | multi |
| 4 | Crea Borer | no | single |
2: HSS drill + carbide reamer
Ra = 0.4751 µm, Rz = 4.2178 µm
4: Crea Borer
Ra = 0.0835 µm, Rz = 1.0556 µm
Easy to Use
1. make a pilot hole of 2 L/D (recommended with Crea Starter)
2. approach the pilot hole with lower RPM less than 600 rpm and then accelerate to the necessary RPM
3. start the boring (you will see tornado chip)
4. when the boring process is completed, decelerate and pull Crea Borer up.
Other features
straightness
113 mm × 79 mm x 40 mm
material: 41CrMo4
d4 through holes (web width 0.25 mm)
low cutting force
10L/D through holes by d2, 3, 4, 5 and 6
material: Cf53
fragile workpiece with thickness 2.2 mm
