This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X240S, 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 SI63X240S
The AirTAC Airtac SI63 Standard Cylinder SI63X240S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 240mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X240S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X240S
- 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 SI63X240S
The AirTAC SI63X240S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore, 240mm stroke, and a G3/8 port. Delivering 1559 N push force at 0.5 MPa, it is replaced by the direct replacement SAI63X240S, which shares identical mounting, output, and stroke dimensions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X240S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X240S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X240S |
| Bore size | Ø63 mm |
| Stroke | 240 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 SAI63X240S 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 SAI63X240S 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 SI63X240S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×240 | 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 SI63X240S Is Used
Clamp Actuation
Provides 1559 N of push force at 0.5 MPa to secure heavy workpieces during machining operations.
Package Diversion
Uses the 240mm stroke to push medium-weight cartons off a main production line onto secondary routing lanes.
Replacing the Airtac SI63 Standard Cylinder SI63X240S with the SAI63X240S
To replace the SI63X240S, order the SAI63X240S. Verify the ISO 15552 mounting interface (LB, FA, TC, etc.), the G3/8 port, the M16x1.5 rod thread, and the -S magnet for current AirTAC switches. Sizing checks: a 50mm bore yields 982 N push at 0.5 MPa, while an 80mm bore yields 2513 N. Note that a standard cylinder drifts on air loss; the cushion only decelerates. For load holding, specify an external pilot check valve or the SAIL/BSAI lock variant. At 240mm stroke, side-load and rod-bending risks are moderate, so guide the load to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X240S
- ✓ 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 SI63X240S FAQ
Yes, the SI63X240S is discontinued. The direct replacement is the SAI63X240S. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 240mm stroke, G3/8 port, and mounting fixtures.
The G3/8 port bore delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical max of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X240S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X240S replacement — usually within 7-8 hours.