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BIG DAISHOWA MEGA Micro Chuck
MEGA Micro Chuck is BIG DAISHOWA's slim, high-precision collet-chuck family for micro drills and end mills. Its notch-free nut and slim taper are intended to reduce interference while preserving balance and concentricity, but selection still depends on the machine interface, S-size, projection, taper form, collet, nut, and coolant configuration.
Product system overview
MEGA Micro Chuck is BIG DAISHOWA's slim, high-precision collet-chuck family for micro drills and end mills. Its notch-free nut and slim taper are intended to reduce interference while preserving balance and concentricity, but selection still depends on the machine interface, S-size, projection, taper form, collet, nut, and coolant configuration.
Industries and applications
- Micro drilling and micro end milling where holder clearance, concentricity, and rigidity are central to the setup.
- Five-axis, mold, medical, and small-feature work where the holder must clear the workpiece or fixture.
- Tooling standardization across BIG-PLUS, HSK, BIG CAPTO, and straight-shank configurations.
Technical and quote details
- The official family page describes a notch-free, slim nut intended to reduce vibration, whistling, and coolant splatter.
- Capacity extends through the 8S body size; sealed-nut coolant delivery is available for specified 6S and 8S configurations.
- BIG DAISHOWA lists BIG-PLUS CAT/BT, HSK, BIG CAPTO, and straight-shank interfaces across the family.
- Tapered T variants and straight-nose variants are distinct catalog configurations and should not be assumed interchangeable.
- Representative catalog numbers below are examples from the official directory, not a complete range or a claim of current stock.
Selection notes
Quote the exact holder and collet catalog numbers together and include tool diameter, gauge length, clearance envelope, target speed, and coolant method.
Use official dimensional data to compare a tapered T configuration against a straight-nose option for the actual interference envelope.
Variables to validate
- The smallest outside profile does not automatically make a holder suitable for every reach or cutting load; projection, tool diameter, and machine dynamics still control stability.
- S-size, collet, nut, taper, projection, and coolant delivery must be matched as a system.
- Verify current dimensional drawings and maximum-speed conditions for the exact catalog number.
Official product references
We work to keep this information reliable, but specifications and availability can change. Verify critical details with the manufacturer through the official resources above.