JIS B 6339-2 BT40

Shrink fit chuck suitable to all kind of shrink fit units.

JIS B 6339-2 BT40 form JD/JF.
Form JD/JF means: Form JD/JF: interior coolant supply through centre (Form JD) and through the collar (form JF)

• Heat resistant hot-working steel
• Hardened 54 – 2 HRC
• For HSS and solid carbide tools
• Shank tolerance h6
• With threaded holes in order to balance with balancing screws
• Cooling with Cool Jet for an extra charge
• Cooling with Cool Flash for an extra charge
• Included in delivery: Back-up screw

The most important features:

• 1. High runout accuracy (< 0.003 mm)
• 2. Extreme clamping torque by high pressing in the clamping bore
• 3. Short chamfer
• 4. Dynamic form: Reinforced shank at long tool holders. Compromise between slimness (marginal interference contour) and rigidity
• 5. Cool Jet (on request)
• 6. Threaded bores for simple and fast balancing with screws

Cool Jet (optional)

• Optimized coolant bores, aimed at center
• Coolant directly to the cutting edge
• Extended tool life up to 100%
• Higher reliability of cutting process
• No more balls of chips on tool
• Cool Jet starting from shank diameter 6 mm

Cool Flash (optional)

• Optimized coolant bores with coolant outlet through slots
• Coolant directly to the cutting edge
• Extended tool life up to 100%
• No more balls of chips on tool
• Optimized runout accuracy! No additional unbalance! No disturbing clearance!
• Cool Flash available for shank diameter 6 - 25 mm