This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX5S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI63 Standard Cylinder SI63BX5S
The AirTAC Airtac SI63 Standard Cylinder SI63BX5S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 5mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX5S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke5 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX5S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI63 Standard Cylinder SI63BX5S
The AirTAC SI63BX5S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore, 5mm stroke, and a SUS304 stainless steel rod (-B). Delivering 1559 N push at 0.5 MPa via its G3/8 port, it is superseded by the SAI63BX5S direct replacement. The SAI retains identical ISO 15552 mounting dimensions, force, and stroke, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. For load-holding, note that a plain cylinder drifts on air loss; the cushion only decelerates. Use an external rod lock or SAIL/BSAI variant. The -S magnet pairs with CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63BX5S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX5S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX5S |
| Bore size | Ø63 mm |
| Stroke | 5 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI63BX5S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAI63BX5S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI63 Standard Cylinder SI63BX5S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×5 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI63 Standard Cylinder SI63BX5S Is Used
Short-Stroke Clamping
Ideal for tight-tolerance clamping of stainless workpieces where the SUS304 rod prevents corrosion in wet machining environments.
Compact Pressing
Delivers 1559 N of push force at 0.5 MPa for light pressing or seating tasks within a 5mm travel envelope.
Valve Actuation
Suitable for high-cycle valve actuation, utilizing the 30-800 mm/s speed range and integrated magnet for end-position confirmation.
Replacing the Airtac SI63 Standard Cylinder SI63BX5S with the SAI63BX5S
To replace the SI63BX5S, order the SAI63BX5S. Confirm the ISO 15552 interface, 63mm bore, 5mm stroke, G3/8 port (PT/G/NPT), and mounting accessory. The -B denotes a SUS304 stainless rod for corrosion resistance, and -S provides a magnet for CS1-B/DS1-B switches. Sizing both ways: a 50mm bore yields 982 N [email protected], while an 80mm bore yields 2513 N. For this 5mm short stroke, side-load is minimal, but if expanding stroke >=300mm, add a guide to prevent rod bending. For dead-load holding, select the SAIL lock or BSAI clamp-lock variant, as standard cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX5S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI63 Standard Cylinder SI63BX5S FAQ
Yes, the AirTAC SI63BX5S is discontinued. The direct replacement is the SAI63BX5S. It shares the same ISO 15552 mounting interface, 63mm bore, 5mm stroke, G3/8 port, and output force, dropping directly into existing fixtures.
The 63mm bore features a G3/8 air port and M16x1.5 rod thread. Forces are: 1559 N push / 1402 N pull @0.5 MPa; 2182 N push @0.7 MPa; 2805 N push @0.9 MPa; with a theoretical max of 318 kgf @1.0 MPa.
Request a Quote for the SAI63BX5S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX5S replacement — usually within 7-8 hours.