Name: CISA Astral S 30/75 double cylinder with clutch (10A3S1560)
Brand: CISA

CISA 10A3S1560 — 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

10A3S1560 dimension diagram: side B 74.5 mm, side A 29.5 mm, overall body length 104 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.

Cylinder dimensions

Dimensions from model documentation
Specifications	Dimensions from model documentation
Dimension A	29.5 mm
Dimension B	74.5 mm
Overall length L	104 mm

Measure both sides from the fixing screw. Check the cylinder profile, cam and version.

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Specifications

Key system: Astral S
Construction: Double cylinder with clutch
Nominal size: 30/75
Dimension A: 29.5 mm
Dimension B: 74.5 mm
Overall length L: 104 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: DIN cam with clutch

Operation and dimensions of this version

10A3S1560 is a double cylinder with clutch: A=29.5 mm, B=74.5 mm, with the two sections totaling L=104 mm. The sections differ by 45 mm; overall length alone does not permit substitution with a symmetrical cylinder or reversal of the two sections.

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 30/75 for 10A3S1560, then verify the actual 29.5+74.5=104 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 98 / printed page 94

Manufacturer documents are provided in their original language.

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