DIN ISO 7388-1 SK40 (formerly DIN 69871)

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

With steep taper SK40 form AD/AF DIN ISO 7388-1 (formerly DIN 69871).
Form AD/AF means: Central coolant supply and coolant channels through the flange which can be sealed again.

• 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: Backup screw

Technical data subjects to change without prior notice.

Standard version, similar to DIN 69882-8.

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