Both BBT and HSK have double-sided grips, but which one is better?
Release date:
2025-12-11
There is no absolute "superiority" or "inferiority" between BBT and HSK as double-sided toolholders; the key is to match the machining requirements—choose HSK for high speed and high precision, and BBT for heavy-duty and stable cutting.
| Dimension | BBT Tool Holder | HSK Tool Holder |
|---|---|---|
| Taper/Structure | 7:24 solid taper (BIG-modified BT), large taper contact area | 1:10 hollow short taper (German standard), hollow thin-walled, compact design |
| Precision/Runout | Radial runout ≤0.005mm, high repeat positioning accuracy | Radial runout ≤0.002mm, stable precision at high speeds |
| Speed Range | ≤20,000rpm (medium-high speed, heavy-duty) | 40,000–60,000rpm (ultra-high speed) |
| Rigidity/Vibration | Solid structure, high bending rigidity & vibration resistance | Centrifugal force self-compensation, good dynamic balance (high-speed light-load) |
| Applications | Large molds, casings, difficult materials (compatible with partial BT spindles) | Aerospace parts, mirror molds, 5-axis machines, automated lines |
| Cost/Compatibility | Cost-effective, low retrofitting cost | Higher price, dedicated HSK spindles required (large initial investment) |
Selection Recommendations:
If ultra-high speed (≥30000rpm) and μm-level precision are the core requirements, such as precision mold making and aerospace thin-walled component machining, HSK is more suitable.
If medium-to-high speed, heavy-duty operation, high rigidity, and vibration resistance are the focus, such as large-scale machining and BT spindle retrofitting, BBT is more advantageous.
BLOGS
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Both BBT and HSK have double-sided grips, but which one is better?
There is no absolute "superiority" or "inferiority" between BBT and HSK as double-sided toolholders; the key is to match the machining requirements—choose HSK for high speed and high precision, and BBT for heavy-duty and stable cutting.
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