Description
BT40 series ER collet chucks are manufactured from high-strength alloy steel with overall vacuum quenching and precision grinding, the standard workhorse tool holders for all BT40 spindle CNC machining centers.
- Ultra-precision machining guarantees ≤0.005mm runout accuracy at 4×D from the chuck face, delivering exceptional machining precision and surface finish.
- G2.5 grade dynamic balance up to 25,000 RPM minimizes vibration at high speeds, extending tool life and improving machining efficiency.
- Comprehensive size range supports ER11, ER16, ER20, ER25, ER32, ER40 and ER50 collets, covering tool diameters from 1mm to 36mm.
- Multiple length options (70L/100L/150L/200L/250L/300L) accommodate various machining depths and workpiece geometries.
- Standard 7/24 taper design is 100% compatible with all mainstream BT40 spindle CNC machine tools.
- Black oxide surface treatment provides excellent corrosion resistance and long-term durability in industrial environments.
Complete Specification Table (Unit: mm)
| Model | L | L1 | L2 | L3 | d1 | d2 | d3 | T | Weight | Price |
|---|---|---|---|---|---|---|---|---|---|---|
| BT40-ER11M-70L | 135.4 | 70 | 43 | 27 | 16 | 11 | 16 | M6×1.0P | 1.15KG | |
| BT40-ER11M-100L | 165.4 | 100 | 73 | 27 | 16 | 11 | 16 | M6×1.0P | 1.2KG | |
| BT40-ER11M-150L | 215.4 | 150 | 123 | 27 | 16 | 11 | 16 | M6×1.0P | 1.5KG | |
| BT40-ER16-70L | 135.4 | 70 | 43 | 27 | 28 | 16 | 28 | M10×1.5P | 1.3KG | |
| BT40-ER16-100L | 165.4 | 100 | 73 | 27 | 28 | 16 | 28 | M10×1.5P | 1.3KG | |
| BT40-ER16-150L | 215.4 | 150 | 123 | 27 | 28 | 16 | 28 | M10×1.5P | 1.6KG | |
| BT40-ER16-200L | 265.4 | 200 | 173 | 27 | 28 | 16 | 28 | M10×1.5P | 1.7KG | |
| BT40-ER16-250L | 315.4 | 250 | 223 | 27 | 28 | 16 | 28 | M10×1.5P | 2.0KG | |
| BT40-ER16-300L | 365.4 | 300 | 273 | 27 | 28 | 16 | 28 | M10×1.5P | 2.3KG | |
| BT40-ER20-70L | 135.4 | 70 | 43 | 27 | 34 | 20 | 34 | M12×1.75P | 1.2KG | |
| BT40-ER20-100L | 165.4 | 100 | 73 | 27 | 34 | 20 | 34 | M12×1.75P | 1.4KG | |
| BT40-ER20-150L | 215.4 | 150 | 123 | 27 | 34 | 20 | 34 | M12×1.75P | 1.7KG | |
| BT40-ER20-200L | 265.4 | 200 | 173 | 27 | 34 | 20 | 34 | M12×1.75P | 2.0KG | |
| BT40-ER20-250L | 315.4 | 250 | 223 | 27 | 34 | 20 | 34 | M12×1.75P | 2.1KG | |
| BT40-ER20-300L | 365.4 | 300 | 273 | 27 | 34 | 20 | 34 | M12×1.75P | 2.4KG | |
| BT40-ER25-70L | 135.4 | 70 | 43 | 27 | 42 | 25 | 42 | M16×2.0P | 1.3KG | |
| BT40-ER25-100L | 165.4 | 100 | 73 | 27 | 42 | 25 | 42 | M16×2.0P | 1.6KG | |
| BT40-ER25-150L | 215.4 | 150 | 123 | 27 | 42 | 25 | 42 | M16×2.0P | 2.05KG | |
| BT40-ER25-200L | 265.4 | 200 | 173 | 27 | 42 | 25 | 42 | M16×2.0P | 2.50KG | |
| BT40-ER25-250L | 315.4 | 250 | 223 | 27 | 42 | 25 | 42 | M16×2.0P | 3.05KG | |
| BT40-ER25-300L | 365.4 | 300 | 273 | 27 | 42 | 25 | 42 | M16×2.0P | 3.55KG | |
| BT40-ER32-70L | 135.4 | 70 | 43 | 27 | 50 | 32 | 50 | M16×2.0P | 1.4KG | |
| BT40-ER32-100L | 165.4 | 100 | 73 | 27 | 50 | 32 | 50 | M16×2.0P | 1.7KG | |
| BT40-ER32-150L | 215.4 | 150 | 123 | 27 | 50 | 32 | 50 | M16×2.0P | 2.4KG | |
| BT40-ER32-200L | 265.4 | 200 | 173 | 27 | 50 | 32 | 50 | M16×2.0P | 3.15KG | |
| BT40-ER32-250L | 315.4 | 250 | 223 | 27 | 50 | 32 | 50 | M16×2.0P | 4.00KG | |
| BT40-ER32-300L | 365.4 | 300 | 273 | 27 | 50 | 32 | 50 | M16×2.0P | 4.40KG | |
| BT40-ER40-80L | 145.4 | 80 | 53 | 7 | 63 | 40 | 63 | M20×2.0P | 1.5KG | |
| BT40-ER40-100L | 165.4 | 100 | 73 | 27 | 63 | 40 | 63 | M20×2.0P | 2.1KG | |
| BT40-ER40-150L | 215.4 | 150 | 123 | 27 | 63 | 40 | 63 | M20×2.0P | 3.2KG | |
| BT40-ER40-200L | 265.4 | 200 | 173 | 27 | 63 | 40 | 63 | M20×2.0P | 3.3KG | |
| BT40-ER40-250L | 315.4 | 250 | 223 | 27 | 63 | 40 | 63 | M20×2.0P | 4.2KG | |
| BT40-ER40-300L | 365.4 | 300 | 273 | 27 | 63 | 40 | 63 | M20×2.0P | 4.5KG | |
| BT40-ER50-100L | 165.4 | 100 | 43 | 27 | 78 | 50 | 78 | M24×2.0P | 1.15KG |
Parameter Explanation
- L/L1/L2/L3/d1/d2/d3 : Overall and mounting dimensions (unit: mm), corresponding to the engineering drawing
- T : Thread specification of the collet nut
- Weight : Net weight per unit (unit: KG)
-
Model Naming
:
- BT40: 7/24 taper spindle interface standard
- ERXX: Matching ER collet series (e.g., ER32)
- XXL: Total length of the tool holder (e.g., 100L = 100mm length)
