SERIES OVERVIEW
BT Strong Milling Chuck
BT strong milling chucks for rigid clamping of straight-shank tools. The series covers BT40 and BT50 tapers with multiple effective lengths and clamping ranges.
Key configuration
| Feature | Specification |
|---|---|
| Spindle taper | BT40 / BT50 |
| Chuck series | SC20 / SC25 / SC32 / SC42 |
| Tool clamping range | 3-36 mm depending on model |
| Effective length range | 90-250 mm depending on model |
Standard models and clamping range
| Product Model | Available Clamping Diameters (mm) |
|---|---|
| BT40-SC20-90L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 |
| BT40-SC25-105L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 |
| BT40-SC32-105L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 |
| BT40-SC32-135L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 |
| BT40-SC32-150L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 |
| BT40-SC32-165L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 |
| BT50-SC32-105L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 |
| BT50-SC32-135L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 |
| BT50-SC32-150L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 |
| BT50-SC32-165L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 |
| BT50-SC32-200L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 |
| BT50-SC32-250L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 |
| BT50-SC42-115L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 / 28 / 30 / 32 / 34 / 36 |
| BT50-SC42-165L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 / 28 / 30 / 32 / 34 / 36 |
| BT50-SC42-200L | 3 / 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 25 / 28 / 30 / 32 / 34 / 36 |
ENGINEERING DATA
Selection data for a technical quotation.
Use the published chart and series attributes where available. For a safe recommendation, send the fields below; BOFA will return the matching geometry, insert and cutting-condition card for your machine.
| Decision field | What to provide or verify | BOFA quotation output |
|---|---|---|
| Published series attributes | BT40 / BT50 · SC20-SC42 · 3-36 mm · Strong Clamping | Confirm the exact model and size chart row |
| Workpiece material and hardness | Exact grade plus measured HRC or HB; include stainless, cast iron, aluminium or mould-steel condition | Recommended grade, geometry and coating |
| Speed, feed and depth | Target RPM or cutting speed, feed units / fz / Vf, axial ap and radial ae | Condition card for the selected diameter and operation |
| Geometry and reach | Diameter or ball radius, flute count, cutting length, overall length, helix and coating | Compatible standard or custom configuration |
| Insert and interface | For indexable tools: body model, insert code, screw and wrench. For solid tools: spindle taper, shank, holder and gauge length | Compatibility check before ordering |
| Tolerance and runout | Required tool-tip runout and diameter / length tolerance | Achievable value confirmed on drawing or datasheet |
| Cooling and maximum engagement | Dry, air blast, MQL or flood coolant with pressure / flow; state required machining depth | Safe engagement guidance; do not infer a limit from cutting length alone |
PRODUCT DETAILS
Images, configurations and size charts.
