This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX140, 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 SI63AX140
The AirTAC SI63 Standard Cylinder SI63AX140 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 SAI63AX140, 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 → SAI63AX140
- 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 SI63AX140
The AirTAC SI63AX140 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 140 mm stroke. Built with an extruded aluminum barrel, it delivers 1559 N push force at 0.5 MPa via its G3/8 port. This specific SKU features a SUS420J2 stainless steel piston rod (-A) for corrosion resistance but lacks a magnet, meaning it cannot accept position switches.
You should order the direct replacement SAI63AX140. It shares the exact ISO 15552 mounting interface, M16x1.5 rod thread, and 318 kgf max force. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure.
Airtac SI63 Standard Cylinder SI63AX140 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX140 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX140 |
| 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 SAI63AX140 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 SAI63AX140 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 SI63AX140
| 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 SI63AX140 Is Used
Corrosive Material Clamping
The SUS420J2 stainless rod excels in damp or washdown clamping stations, providing 1559 N of secure holding force at 0.5 MPa without rusting.
Package Diverting
Ideal for pushing medium-weight cartons off a main conveyor line over a 140 mm travel distance, cycling reliably at speeds up to 800 mm/s.
Pallet Stop Gate
Acts as a robust pneumatic stop gate for pallets, using its 318 kgf maximum theoretical force to halt momentum safely within automated storage systems.
Replacing the Airtac SI63 Standard Cylinder SI63AX140 with the SAI63AX140
To replace this SI63AX140, order the SAI63AX140. Verify your ISO 15552 mounting accessories (LB, FA, TC, etc.), the 140 mm stroke, and the G3/8 port. Because this SKU has no -S suffix, it cannot hold a magnetic sensor; the legacy SI used CS1-B/DS1-B switches, but this bare rod version cannot take them. If you need sensing, specify an SAI with an S suffix. If sizing down, a 50 mm bore yields 982 N push at 0.5 MPa; if sizing up, an 80 mm bore provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX140
- ✓ 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 SI63AX140 FAQ
Yes, the SI63AX140 is discontinued. The direct replacement is the SAI63AX140. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 140 mm stroke, G3/8 port, and mounting interface, so it fits existing fixtures perfectly.
This 63 mm bore cylinder features a G3/8 air port and an M16x1.5 rod thread. At 0.5 MPa it provides 1559 N push and 1402 N pull force. At 0.7 MPa push is 2182 N, and at 0.9 MPa it is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX140
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX140 replacement — usually within 7-8 hours.