Techniks/SYIC BT40 shrink-fit tool holder designed for cutting tools with a precise 3/8-inch shank. Part number 39113 features a 90mm—or 3.54-inch—projection for high-speed CNC milling, mold work, and extended-reach machining.
Shrink-fit clamping delivers rigid, concentric tool retention without a conventional collet or set screw. This holder is balanced to G2.5 at 25,000 RPM and rated for maximum runout of 0.0001 inch.
An unidentified used carbide end mill and BT40 retention knob are installed and included as pictured.
PRE-OWNED IN EXCELLENT CONDITION
HOLDER STICK OUT LENGTH: 3"
Specifications:
- Brand: Techniks / SYIC
- Manufacturer part number: 39113
- Additional marking: 12237T
- Holder type: Shrink-fit tool holder
- Machine taper: BT40
- Tool-shank capacity: 3/8 in
- Projection/gauge length: 90mm / 3.54 in
- Nose diameter: Approximately 0.94 in
- Body diameter: Approximately 1.25 in
- Overall length: Approximately 6 in
- Clamping length: Approximately 1.65 in
- Balance rating: G2.5 at 25,000 RPM
- Maximum runout: 0.0001 in
- Coolant capability: Coolant-through
- Pull stud/retention knob: Included
- Cutting tool: Unidentified used carbide end mill included
- Shrink-fit machine required for tool removal and installation
Condition:
Pre-owned industrial tooling with scratches, machining residue, scattered surface oxidation, and significant heat discoloration around the shrink-fit nose. The installed cutter shows visible previous use and surface marks. Its manufacturer, exact cutting diameter, coating, and remaining service life have not been verified.
The holder, installed cutting tool, and retention knob shown in the photographs are included. Please inspect the photos carefully and verify the BT40 taper, 3/8-inch tool shank, gauge length, and retention-knob compatibility before ordering.