Name: CISA Astral S 50/10 half cylinder (10A314040)
Brand: CISA

CISA 10A314040 — Official series illustration, not a photo of this exact size variant; consult model specifications. — Official series illustration, not a photo of this exact size variant; consult model specifications.Image source

10A314040 dimension diagram: side B 10 mm, side A 49.5 mm, overall body length 59.5 mm — Our dimension diagram follows the corresponding catalogue row; it is not a product view or machining template; the projecting knob shaft is excluded from body dimension L.

Product dimensions

Dimensions from model documentation
Specifications	Dimensions from model documentation
Dimension A	49.5 mm
Dimension B	10 mm
Overall length L	59.5 mm

Compare the overall dimensions and mounting points with the documentation for the specific product.

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Specifications

Key system: Astral S
Construction: Half cylinder
Nominal size: 50/10
Dimension A: 49.5 mm
Dimension B: 10 mm
Overall length L: 59.5 mm
Coding construction: 10 pin positions: 6 active, 4 passive
Body construction: Brass body with a dual-material anti-snap reinforcing core
Key type: Reversible flat key in special nickel-plated brass
Operating mechanism: Cam adjustable to 8 positions

Operation and dimensions of this version

10A314040 has key operation on one side only, A=49.5 mm, with the other section B=10 mm; Nominal size 50/10 must not be interpreted as a double cylinder accepting keys on both sides. The cam adjusts to 8 positions; check the starting angle and lock-body drive requirements when matching components.

Key system and installation checks

The dual-material reinforcing core in this series uses segmented components along the cylinder length; this is a feature of the body construction. The catalogue lists Code Card; this does not establish key interchangeability with other Astral series.

When selecting, first record nominal size 50/10 for 10A314040, then verify the actual 49.5+10=59.5 mm against the drawing. Nominal size is an ordering identifier; adding its two integers does not give the actual overall length.

Limitations

Dimensions are divided at the central reference in the catalogue drawing; a and B do not automatically designate the outside and inside of the door. Installation also requires checking the lock-body cam interface, door thickness and escutcheon thickness.
Catalogue model numbers and dimensions do not establish current stock availability or certification of the complete door; Before purchase, check the actual supplied product's identification plate and the manufacturer's installation documentation.

Sources

CISA 2026 English catalogue, PDF page 99 / printed page 95

Manufacturer documents are provided in their original language.

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