High performance, low vibration drive mechanism
A planetary gear system that has been constantly refined and upgraded over the years since BIG first announced the Speed Increaser in 1970. Ground gears are used to achieve low-vibration rotation.
Long nose type for mold machining (GTX)
Low heat generation design drastically reduces spindle expansion. Ideal for long small diameter machining such as molds. Long nose is ideal as an interference countermeasure.
Hight Spindle GTG
- High Spindle improves drilling and end-milling performance on existing machines by multiplying the spindle speed 4, 5 or 6 times.
Clamping Range: ø0.5 – ø16
| Model | Clamping diameter ød | øD | øD1 | L | L1 | L2 | S | Collet Model | Speed ratio | Max. (min-1) | Allowable torque N-m | Weight (kg) |
| BBT40-GTG5-8-139 | 0.5 – 8 | 25 | 80 | 139 | 19 | 43 | 65 | NBC8 | 4.67 | 20,000 | 7.8 | 4.8 |
| BBT40-GTG5-8-180 | 180 | 60 | 4.9 | |||||||||
| BBT40-GTG5-10-140 | 1.5 – 10 | 30 | 140 | 20 | NBC10 | 4.8 | ||||||
| BBT40-GTG5-10-180 | 180 | 60 | 4.9 | |||||||||
| BBT50-GTG6-8-157 | 0.5 – 8 | 25 | 100 | 157 | 19 | 58 | 80 | NBC8 | 5.67 | 20,000 | 8.0 | 8.8 |
| BBT50-GTG6-8-200 | 200 | 62 | 8.9 | |||||||||
| BBT50-GTG6-10-158 | 1.5 – 10 | 30 | 158 | 20 | NBC10 | 8.8 | ||||||
| BBT50-GTG6-10-200 | 200 | 62 | 9.0 | |||||||||
| BBT50-GTG4-16-177 | 2.5 – 16 | 42 | 110 | 177 | 25.5 | NBC16 | 3.8 | 15,000 | 27.7 | 10.6 | ||
| BBT50-GTG4-16-220 | 220 | 68.5 | 11.0 |
Hight Spindle GTX
Clamping Range: ø0.5 – ø8
It multiplies the spindle speed by 6 times.
The low heat generation design greatly reduces the spindle’s expansion.
High rigidity design with less deflection.
The long nose design is optimal for die & mold.
| Model | Clamping diameter ød | Speed ratio | Collet Model | Max. speed (30 min) min-1 | Continuous speed min-1 | Allowable torque N-m | Weight (kg) |
| BBT50-GTX6-8-200 | 0.5 – 8 | 5.67 | NBC8 | 24,000 | 20,000 | 8.0 | 9.3 |
