Fukuda Seiko, Japan
Fukuda Seiko CR Center Reamer
Made in Japan
Manufacturer: Fukuda Seiko
Model: CR
A reamer used for finishing the center hole or chamfering. Reduced chatter with odd number of blades.
Large diameter tolerance: +0.2 to +0.6
Angle Tolerance: ±15′
■ Center reamer (Angle 60°)
| Designation (φD×θ) |
Large diameter (φD) |
Small diameter (φD1) |
Outer diameter length ( 1) |
Cutting edge ( ) |
Overall length (L) |
Shank diameter (φd) |
Number of teeth (N) |
shape |
| 6×60ﾟ | 6 | Tongari Center |
13 | 5.2 | 43 | 6 | 5 | Figure 1 |
| 8×60ﾟ | 8 | 18 | 6.93 | 48 | ||||
| 10×60ﾟ | 10 | 8.66 | 7 | |||||
| 12×60ﾟ | 12 | 25 | 10.39 | 55 | 8 | |||
| 16×60ﾟ | 16 | 13.86 | 10 | |||||
| 20×60ﾟ | 20 | 17.32 | ||||||
| 25×60ﾟ | 22 | 35 | 31.65 | 70 | 12 | 9 | ||
| 30×60ﾟ | 30 | 38 | 25.98 | 73 | ||||
| 35×60ﾟ | 35 | 43 | 30.31 | 80 | ||||
| 40×60ﾟ | 40 | 45 | 34.64 | 85 | ||||
| 45×60ﾟ | 45 | 48 | 38.97 | 88 | ||||
| 50×60ﾟ | 50 | 57 | 43.3 | 100 | ||||
| 60×60ﾟ | 60 | 10 | 61 | 111 | 16 | 11 | Figure 2 |
■ Center reamer (angle 90°)
| Designation (φD×θ) |
Large diameter (φD) |
Small diameter (φD1) |
Outer diameter length ( 1) |
Cutting edge ( ) |
Overall length (L) |
Shank diameter (φd) |
Number of teeth (N) |
shape |
| 6×90ﾟ | 6 | Tongari Center |
11 | 3 | 41 | 6 | 5 | Figure 1 |
| 8×90ﾟ | 8 | 15 | Four | 45 | ||||
| 10×90ﾟ | 10 | Five | 7 | |||||
| 12×90ﾟ | 12 | 20 | 6 | 50 | 8 | |||
| 16×90ﾟ | 16 | 8 | 10 | |||||
| 20×90ﾟ | 20 | 10 | ||||||
| 25×90ﾟ | 25 | 25 | 12.5 | 60 | 12 | 9 | ||
| 30×90ﾟ | 30 | 30 | 15 | 65 | ||||
| 35×90ﾟ | 35 | 17.5 | 67 | |||||
| 40×90ﾟ | 40 | 20 | 70 | |||||
| 45×90ﾟ | 45 | 33 | 22.5 | 73 | ||||
| 50×90ﾟ | 50 | 37 | 25 | 80 | ||||
| 60×90ﾟ | 60 | 10 | 45 | 100 | 16 | 11 | Figure 2 |
■ Center reamer (angle 120°)
| Designation (φD×θ) |
Large diameter (φD) |
Small diameter (φD1) |
Outer diameter length ( 1) |
Cutting edge ( ) |
Overall length (L) |
Shank diameter (φd) |
Number of teeth (N) |
shape |
| 6×120ﾟ | 6 | Tongari Center |
10 | 1.73 | 41 | 6 | 5 | Figure 1 |
| 8×120ﾟ | 8 | 13 | 2.31 | 45 | ||||
| 10×120ﾟ | 10 | 2.89 | 7 | |||||
| 12×120ﾟ | 12 | 15 | 3.46 | 50 | 8 | |||
| 16×120ﾟ | 16 | 4.62 | 10 | |||||
| 20×120ﾟ | 20 | 20 | 5.77 | |||||
| 25×120ﾟ | 25 | 7.22 | 60 | 12 | 9 | |||
| 30×120ﾟ | 30 | 25 | 8.66 | 65 | ||||
| 35×120ﾟ | 35 | 10.10 | 67 | |||||
| 40×120ﾟ | 40 | 11.55 | 70 | |||||
| 45×120ﾟ | 45 | 30 | 12.99 | 73 | ||||
| 50×120ﾟ | 50 | 14.43 | 80 |
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