Mechanical variable speed drives meet ATEX 100a
A
Stober Drives product story
Edited by the Engineeringtalk editorial team
Nov 7, 2003
Stober Drives has confirmed that all its own-brand mechanical variable speed drives all are compliant with Directive 94/9/EC, otherwise known as ATEX 100a.
Stober Drives has confirmed that all its own-brand mechanical variable speed drives all are compliant with Directive 94/9/EC, otherwise known as ATEX 100a.
The directive, which was adopted throughout the EU on 1st July 2003, has been a legal requirement in Germany since 1996.
Just because a mechanical variable speed solution is not the fashionable way to offer variable speed it does not mean it is not competitive.
When looking at the total solution cost, a mechanical variator is still a competitive solution if the system only needs speed changes during setup or very rarely.
As with larger sized steplessly variable gear units the speed control works on the friction principle.
In the case of the RD11 drives two friction systems are connected in series.
This provides a rigid arrangement of input and output shafts, a completely closed gear case, a substantially larger speed range and at the same time clearly reduces overall dimensions compared to a single friction system.
Power transmission is by dry adherence between the two drive cone/raceway pairs.
Stober MGS supplementary gears available in helical inline, helical shaft mounted, helical bevel and helical worm also meet the EC Directive 94/9/EC, and are employed to reduce the speed and increase the torque correspondingly.
The four available MGS series units all stand out for their modular block design.
A connecting flange joins them to the variable speed gears, providing an attractive unit.
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