12B-1 Z=26 Simplex hammasr.

Hub sprocket for 12B roller chain
- 3/4 x 7/16 / DIN 8187
- Pitch 19.05 mm
- Tooth widths: 12B-1: 11.1 mm, 12B-2: 30.3 mm, 12B-3: 49.8 mm
- For products with a ready-made keyway, the name indicates the bore, e.g. D=30H7+ku
- Also available machined according to drawing
- Material: C45

Markings:
- de=top diameter (mm)
- dp=pitch diameter (mm)
- dm=hub diameter (mm)
- D=diameter of pre-drilled or finished shaft bore (mm)
- b=width of individual tooth (mm)
- B=total tooth width (mm)