This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X140S, 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 SI63X140S
The AirTAC Airtac SI63 Standard Cylinder SI63X140S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 140mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X140S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X140S
- 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 SI63X140S
The AirTAC SI63X140S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 140mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is SAI63X140S, retaining the exact interface, force, and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. The original SI line lacked lock variants, but the SAI family adds SAIL and BSAI options. The -S suffix means a magnet for CS1-B/DS1-B switches.
Airtac SI63 Standard Cylinder SI63X140S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X140S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X140S |
| Bore size | Ø63 mm |
| Stroke | 140 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 SAI63X140S 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 SAI63X140S 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 SI63X140S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×140 | 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 SI63X140S Is Used
Clamp Actuation
Securing heavy machining fixtures with 1559N push force at 0.5MPa for rigid workholding.
Package Diverting
Driving 140mm stroke diverting arms to route heavy pallets along handling lines.
Lift Gates
Raising lower-tier loading gates where a 79kg vertical lift capacity is required.
Replacing the Airtac SI63 Standard Cylinder SI63X140S with the SAI63X140S
To replace the SI63X140S, order SAI63X140S. Verify the ISO 15552 mounting interface, 63mm bore, 140mm stroke, G3/8 port, and magnet. Neighbouring bores: 50mm yields 982N push @0.5MPa; 80mm yields 2513N. The cushion only decelerates; it does not hold load on air loss. For held loads, use the SAIL lock or BSAI clamp-lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X140S
- ✓ 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 SI63X140S FAQ
Yes, the SI63X140S is discontinued. The direct replacement is the SAI63X140S. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 140mm stroke, G3/8 port, and output force.
The 63mm bore uses a G3/8 port. Force output is 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X140S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X140S replacement — usually within 7-8 hours.