Safety Chucks That Hold Winding Shafts Securely
Boschert in Lörrach, Germany has made safety chucks for more than 75 years – its Classic C-chuck has been an industry standard since 1948. The range runs from mini chucks to 64-tonne units, with sliding, automatic and pneumatic chucks, brakes and clutches. Norman G Clark is the Australian representative.
Not sure what you need? Call (03) 9116 9200 and talk it through with our team.
Solutions
What Do You Need?
Converting & printing. Unwinds and rewinds on film, foil and label lines.
Paper & board. Heavy reels on unwind stands and rewinders.
Textiles & nonwovens. Fabric and nonwoven winding.
Metal & heavy rolls. The largest chucks carry up to 64 t.
Hold and Drive a Winding Shaft
Manual safety chucks, foot or flange mounted.
The range
Boschert Products
Hold and drive a winding shaft
Safety Chucks (VT and C)
Manual safety chucks from mini to 64 t, with VT replaceable wear parts or Classic C.
150 kg – 64 t
Line up or move the shaft sideways
Sliding Chucks
Safety chucks that slide sideways to line up the shaft – manual or motorised.
50 or 100 mm travel
Open and close without the operator
Automatic and Pneumatic Chucks
Chucks that open and close themselves – DGUV certified.
A40 – A80, P30 – P50
Brake or drive the shaft
Brakes and Clutches
Single-disc, double-disc and multi-calliper brakes, and clutches, built onto the chuck.
Manual or pneumatic
How it works
How a Safety Chuck Works
Hold the shaft, drive it, and never let it go.
Square Drive
Each end of the winding shaft has a square journal. It drops into the chuck’s square insert, which carries the drive or brake torque to the shaft.
Locked Shut
A handwheel swings over the journal and locks it in. The chuck can’t open while the shaft turns, so the shaft can’t jump out – then it opens fully so a crane or hoist can lift the shaft straight out.
VT: Replaceable Wear Parts
On VT chucks, the parts that touch the journal are separate VT wear parts. When they wear, you swap them – quickly and cheaply – instead of replacing the chuck, and their hardness can be matched to your shaft journals.
Why Boschert, through Norman G Clark
Safety Chuck Specialists
75+ Years
Specialists in safety chucks since 1948.
Certified
Automatic and pneumatic chucks carry DGUV test certificates (EN 1010-1).
Made to Suit
Square size, shaft end and options built to your machine.
Local Support
Norman G Clark sizes chucks and supplies VT wear parts – call (03) 9116 9200.
Video
Boschert Safety Chucks
Literature
Catalogues and Data Sheets
Catalogue
- Boschert product catalogue
Safety, sliding, automatic and pneumatic chucks, brakes, clutches, options (2024) · PDF, 13.7 MB - Safety chuck overview
Sizes, loads and torque · PDF, 13.7 MB - Brakes
ESB, DSB and Multi brakes · PDF, 13.7 MB - Options
Locks, monitoring, hydraulic opening and more · PDF, 13.7 MB
Talk to Us About Your Application
Tell us about the job – the machine, the conditions and what it has to do – and we’ll help you choose the right Boschert product.