This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX140S, 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 SI63AX140S
The AirTAC Airtac SI63 Standard Cylinder SI63AX140S 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 SAI63AX140S, 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 → SAI63AX140S
- 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 SI63AX140S
The AirTAC SI63AX140S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore and 140 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63AX140S, matching the interface, stroke, force and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This SI unit has a SUS420J2 stainless rod (-A) and a magnet (-S) for CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63AX140S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX140S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX140S |
| 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 SAI63AX140S 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 SAI63AX140S 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 SI63AX140S
| 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 SI63AX140S Is Used
Clamp Actuation
Secures stainless workpieces during machining, using the SUS420J2 rod to resist coolant spray while providing 1559 N of clamping thrust.
Vertical Lifting
Elevates components weighing up to 79 kg on packaging lines, utilizing the double-acting chamber for controlled descent.
Replacing the Airtac SI63 Standard Cylinder SI63AX140S with the SAI63AX140S
To replace the SI63AX140S, order the SAI63AX140S. Verify the ISO 15552 mounting interface, 140 mm stroke, G3/8 port, and the -S magnet for current AirTAC switches. The SUS420J2 stainless rod (-A) resists corrosion. If you need more force, the 80 mm bore yields 2513 N push at 0.5 MPa; if less, the 50 mm bore gives 982 N. For loads over 140 mm, add external guides to prevent rod bending. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX140S
- ✓ 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 SI63AX140S FAQ
Yes, the SI63AX140S is discontinued. The direct replacement is the SAI63AX140S. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 140 mm stroke, force, G3/8 port and mounting fixtures.
This 63 mm bore cylinder uses a G3/8 port. It generates 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a maximum theoretical force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX140S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX140S replacement — usually within 7-8 hours.