Page 8 - MILLING CATALOG p549-788

TOOLING SYSTEMS Power Chucks 32 1 INTRODUCTION
INTRODUCTION
With this tool, only a small tightening torque compresses 10
the frontal nose, providing an extremely high gripping 67
force. It is designed for roughing and finishing applications 11 9 8 54
in milling where high torque transmission, maximum
accuracy, compactness and easy operation are required. 1 Shallow tapered front end cone
2 Clamping nut
Features 3 Helical slot
• The clamping nut is not threaded (as in ER collet chucks) 4 Needle bearing cage
• Designed for direct chucking of the tool shank – 5 Front seal
6 Ventilation bore (thread M4)
no need for intermediate collet for maximum gripping force 7 Preset screw thread
• Sealed nut construction 8 Cap screw (for the preset screw)
• No axial drawback of the tool shank as chuck is tightened 9 Preset screw
• Thick wall construction to withstand greater side 10 Ground bore
11 Grip groove (for collet release)
loading forces

The high gripping force achieved by the MAXIN POWER
CHUCK results from the shallow nose tapered cone (1) with
helical slot (3) inside the internal chuck bore. It exerts a very
high clamping force when the clamping nut (2) is rotated
in the axial direction.The shallow taper of the tool nose (1)
and the angled position of the needle bearing (4) that sit in
the cage create the axial movement of the clamping nut (2).
This unique clamping mechanism eliminates
axial movement of the shank while clamping,
simplifying the preset process.

Runout Accuracy
Maximum runout at 3XD overhang is less 0.01 mm

3xD

0.01

D

556 ISCAR