SK Tool Holders (DIN 69871 / DIN ISO 7388-1) Technical Information
SK tool holders are manufactured to DIN 69871 and DIN ISO 7388-1 standards and are widely used in machining centers for reliable taper performance and secure spindle interface.
Standard Compatibility Matters
SK and BT holders are different systems and should not be used interchangeably. Correct holder selection is essential for proper spindle fit, safe operation, and machining accuracy.
Can SK Holders Be Used Instead of BT Holders?
No. SK series holders cannot be used in place of BT series holders because the two standards are different.
SK Series
- Standard: DIN 69871.
- Also referenced under DIN ISO 7388-1.
- Designed for machines and spindle systems compatible with SK tooling.
BT Series
- Standard: BT MAS 403.
- Also referenced under DIN ISO 7388-2.
- Designed for spindle systems compatible with BT tooling.
Note: Always match the holder standard to the machine spindle specification before use.
