Parameter Symbol Unit Dimensions

tool interface HSK/SK [-] 63/40 100outer diameter of motor-spindle ØMSP [mm] 230 280outer diameter of headstock ØAP [mm] 315 370outer diameter of flange ØAD [mm] 335 400length A [mm] 66 66length B [mm] 68 68length C [mm] 43 43height H [mm] 135 135axial force limit FGA [kN} 12 - 17 16 - 20torque limit MG [kNm] 1,6 - 1,8 2,4 - 2,6weight m [kg] 22 30swivel angle α [°] 4 4stroke h [mm] 20 20

Motor-SpindleSafety System MS3

www.jakobantriebstechnik.de

Motor-Spindle Safety System MS3 Overload and Collision Protection

In milling machine tools, enormous impact forces act on the motor-spindle in case of tool collision with high feed rates. Five-figure (Euro) servicing and repair costs are common after a collision. The newly developed JAKOB motor-spindle safety system disconnects power trans-

mission immediately at the interface between spindle box and motor-spindle in case of collision-caused overload. Therefore the shock-prone components of the motor-spindle are effectively protected from high force peaks.

Collision Protection

Safety Solution for Motor-Spindles

Field of ApplicationProtective element for machine tools in which components of the motor-spindle such as bearings, shaft, clamping system and transducer need to be protected from collision and overload-caused damages.

Description of FunctionOverload protection in case of collision through all-round protection of the motor-spindle with subsequent re-positioning. Automatic disconnection in case of exceeding holding forces. The deflection of the motor-spind-le can, depending on the type of collision, either happen through disengagement or pivoting in case of axial or radial collision, respectively. During the subsequent clearing of the motor-spindle after collision, the safety system is restored back to its initial center position precisely through springs and a self-centering separator .

Operating Principle+ Permanent magnets integrated into the seperator for high holding forces and stiffness+ Springs and shock absorbers for automatic repositioning and impact absorption + Interlocking double-flange system for high precision of reengagement

Motor-Spindle Safety System MS3 Overload and Collision Protection

System Design

sealing

spring elementsmagnetic system

shock absorbers

spindle flange

machine tool flange

sensor cables ofproximity switch

center pin

cover panel

milling process: safety system remains in initial center position, not deflected.

axial tool collision: safety system disengages by stroke s.

radial tool collision: safety system swivels out by angle a.

1

2

3

1 2 3

System advantages+ energy-autarkic+ high precision of reengagement+ high holding force limit and stiffness+ quicker to react than mere electrical process monitoring systems+ absorption of kinetic impact energy+ integrated sensor query of deflection + increase of machine availibility+ costumizable for common motor-spindle geometries+ automatic reset + maintenance-free

All-round Protection

stroke hswivelangle a

www.jakobantriebstechnik.deinfo@jakobantriebstechnik.de

Telefon +49(0)6022 2208-0Telefax +49(0)6022 2208-22

Daimler Ring 42, IndustriegebietDE-63839 Kleinwallstadt

Motor-Spindle Safety System MS3

Parameter Symbol Unit Dimensions

tool interface HSK/SK [-] 63/40 100outer diameter of motor-spindle ØMSP [mm] 230 280outer diameter of headstock ØAP [mm] 315 370outer diameter of flange ØAD [mm] 335 400length A [mm] 66 66length B [mm] 68 68length C [mm] 43 43height H [mm] 135 135axial force limit FGA [kN} 12 - 17 16 - 20torque limit MG [kNm] 1,6 - 1,8 2,4 - 2,6weight m [kg] 22 30swivel angle α [°] 4 4stroke h [mm] 20 20

Ø MSP

Ø AD

A B

H

Technical Data

Ø A

P

C

* subject to change, application-specific draft on demand