Equipment and parts for Boschert / Boschert Safety Chucks

Industrial safety chucks and winding tension control systems by Boschert / Boschert Safety Chucks: series C, VT rapid change units, sidelay sliding chucks, and pneumatic multi brakes.

Series C Mechanical Safety Chucks (Boschert C Safety Chucks)

Classic series C safety chucks by Boschert / Boschert Safety Chucks have set the winding benchmark since 1948. These units provide dependable shaft retention with automatic collar closure upon rotation, preventing roll disengagement during low and medium line speed web operations.

Rigid steel housing design suitable for pedestal foot mounting or flat face flange setup
Hardened seat pockets engineered for square drive journal ends across standard sizes
Mechanical pivoting handwheel collars featuring spring loaded locks for reliable closure
Heavy duty precision bearing assemblies with contact seals for demanding winding lines

Series VT Replaceable Insert Chucks (Boschert VT)

Specialised series VT safety chucks by Boschert / Boschert Safety Chucks allow rapid insert exchange directly on the machinery without shaft dismantling. The versatile design accepts interchangeable insert profiles in diverse hardness levels to match square or bespoke shaft journal shapes.

Precision machined replaceable insert sets spanning VT1 to VT8 alloy steel configurations
Robust rotating handwheel collars ensuring automated locking during spindle rotation
Flexible elastomer Finger Guards providing operator protection around moving parts
Spring ball detents and set screws for eliminating axial play during high speed runs

Series Sidelay Axial Sliding Safety Chucks (Boschert Sidelay)

Sliding sidelay safety chuck assemblies by Boschert / Boschert Safety Chucks deliver precision axial positioning of the winding core during active web conversion. These sliding units accommodate winding shaft length tolerances and enable sideways alignment to keep running material edges true.

Rigid guide rails supporting fifty millimetre or one hundred millimetre axial travel
Fine thread lead screws with manual handwheel or motorized linkage for sidelay adjustment
Full compatibility with interchangeable VT1 through VT7 insert pocket geometries
Heavy duty thrust roller bearings absorbing substantial dynamic lateral thrust loads

Pneumatic Automated Safety Chucks (Boschert Automatic)

Automated pneumatic chucks by Boschert / Boschert Safety Chucks are engineered for high throughput web converting lines requiring minimal manual intervention. Pneumatic actuators execute remote opening and closing, supported by mechanical fail-safe retention if air pressure drops.

Double acting pneumatic cylinders operating smoothly at standard factory airline pressures
Mechanical fail-safe latching design retaining the shaft during unplanned power loss
Inductive proximity switches providing positive feedback for open and shut positions
Rigid mounting flanges configured for straightforward integration on robotic turrets

Pneumatic Multi Calliper Brakes (Boschert Multi Brakes)

Modular multi calliper pneumatic disc brakes by Boschert / Boschert Safety Chucks maintain accurate web tension during heavy unwind cycles. The modular calliper configuration enables tailored braking torque spanning fifty to twelve hundred Newton metres across diverse substrates.

Modular pneumatic callipers allowing independent circuit control for stepped tensioning
Ventilated alloy brake discs delivering rapid heat dissipation during continuous slips
Asbestos free friction pads ensuring extended service intervals and progressive braking
Direct mounting brackets engineered to mount directly on Boschert safety chuck bodies

Replacement Inserts and Hardware (Boschert Spares)

Precision maintenance hardware and wear components for Boschert / Boschert Safety Chucks safeguard converting machine productivity. Timely renewal of worn inserts and protective guards avoids shaft journal deterioration, operational vibration, and unwanted downtime.

Tough elastomer Finger Guards shielding machine operators around the chuck entry jaws
Spring loaded ball detent assemblies, lock screws, and retention hardware kits
Interchangeable drive insert pockets in square, triangular, or bespoke drive profiles
Pneumatic cylinder seal kits and resilient O-rings for automated chuck maintenance

Selection and Mounting Guidelines

Specifying safety chucks for converting lines requires evaluating maximum coil roll weight, operational line velocity, transmitted torque, and shaft end dimensions. For standard winding requirements, Boschert / Boschert Safety Chucks series C provides dependable mechanical retention.

In high duty environments with rapid roll changes, series VT with replaceable insert pockets is recommended. Pedestal foot mounting provides a sturdy base on horizontal frames, whereas face flange configurations suit compact side machine housings.

Precise shaft alignment prevents vibration and preserves winding shaft longevity.

Maintenance of VT Replaceable Inserts

The primary advantage of series VT safety chucks by Boschert / Boschert Safety Chucks is the capability to renew wearing drive pockets directly on the processing machinery. During cyclic acceleration and deceleration, insert drive pockets absorb continuous torque peaks.

Scheduled inspections must check pocket wear limits and radial clearances. When wear exceeds manufacturer guidelines, insert pockets should be replaced in matched pairs. Regular insert updates protect precision shaft ends from fretting and avert unplanned production halts.

Axial Adjustment of Sidelay Chucks

Sliding sidelay safety chucks by Boschert / Boschert Safety Chucks allow operators to trim roll alignment across web conversion processes.

With axial movement capabilities of fifty or one hundred millimetres, the mechanism compensates for shaft length variances and corrects edge tracking errors dynamically. Mounting rails must be aligned parallel to the web direction to avoid binding the lead screw.

Regular cleaning of sliding ways and applying specified lubricant ensures smooth lateral adjustments even under full roll weight.

Pneumatic Circuits of Automated Chucks

Automated safety chucks by Boschert / Boschert Safety Chucks feature pneumatic actuation for remote shaft clamping in robotic or turret winding equipment. The pneumatic supply line should provide filtered, dry compressed air regulated between five and six bar.

Integrated mechanical locks guarantee shaft retention in the event of airline pressure failure. Periodic servicing involves checking pneumatic cylinder seals, verifying air connections, and inspecting proximity switches that confirm jaw closure to line controllers.

Tension Control with Multi Brakes

Pneumatic multi calliper disc brakes by Boschert / Boschert Safety Chucks provide steady web tension as roll diameter decreases during unwind cycles. The modular calliper setup allows selective activation of air chambers to tailor braking torque from fifty up to twelve hundred Newton metres.

Routine maintenance involves inspecting friction pad wear and ensuring uniform clearance against ventilated alloy brake discs. Friction pads can be inspected and replaced quickly without dismounting chuck bodies.

Preventive Maintenance and Operational Safety

Reliable operation of Boschert / Boschert Safety Chucks winding machinery depends on strict adherence to maintenance procedures. Safety chucks must never be operated without functional elastomer Finger Guards protecting personnel near moving jaws.

Maintenance teams must inspect spring detents and rotating handwheel collars to ensure positive self closing action upon initial rotation. Keeping chuck mechanisms free of paper dust, adhesive residue, and debris prevents jamming and extends service life.

Boschert / Boschert Safety Chucks and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Boschert / Boschert Safety Chucks and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.