Hydraulic expansion chuck HSK 40 - 12 - 90Application: For mounting straight shank tools acc. DIN 1835 form A+B+E and DIN 6535 form HA+HB+HE (larger than dia. 20 mm only with reduction sleeve). Delivery: Without wrench All holders are made of forged steel Specific, low warpage hardened Surface hardened HRC 58~60 Hardening depth 0,8mm~0,9mm Surface roughness Ra < 0,4 m Tensile strength in the core of min. 800 N mm after DIN All functional surfaces fine machined

To increase the specific contact pressure per unit area

For machines with rigid tapping

Effective from low to high coolant pressures

All holders are made of forged steel

quantity of inserts:

nuts and plain washers

Suitable for internal coolant

vertical and lateral

Automatic On/Off to maximize battery life

for clamping holders with coolant channels directly to the cutting edge

Sealing capacity up to 80 bar

20 mm only with reduction sleeve)