Knurled control knobs EN 526 have a colored cover that conceals protruding or recessed shafts and is suitable for imprinting characters or symbols, if desired.
For assembly, the cover can be pressed on by hand. Disassembly is done by applying light pressure on the edge of the cover.
The combination with scale rings EN 526.1 extends the application possibilities of the control knobs. The scale rings are fastened using the 3 bores on the pitch circle d8.