This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX95, 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 SI50 Standard Cylinder SI50AX95
The AirTAC Airtac SI50 Standard Cylinder SI50AX95 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 95mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50AX95, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke95 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50AX95
- 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 SI50 Standard Cylinder SI50AX95
The AirTAC SI50AX95 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 95mm stroke. Delivering 982 N push force at 0.5 MPa through a G1/4 port, it is replaced by the SAI50AX95 direct. This upgrade retains identical mounting and force but uses a two Y-shaped one-way piston seal for low start-up pressure. The -A rod specifies SUS420J2 stainless steel. Without a -S suffix, this SKU cannot take a magnetic switch.
The SAI family expands functionality with SAIL, SAIF, and BSAI lock variants the SI lacked. Note the cushion only decelerates; it does not hold load on air loss.
Airtac SI50 Standard Cylinder SI50AX95 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX95 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX95 |
| Bore size | Ø50 mm |
| Stroke | 95 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50AX95 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50AX95 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50AX95
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×95 | 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 SI50 Standard Cylinder SI50AX95 Is Used
Stainless Rod Clamping
Uses the SUS420J2 rod to resist moisture while providing 982 N of clamping force for light material holding.
95mm Transfer Divert
Short 95mm stroke pushes packages between conveyor lanes without requiring magnetic position sensing.
Replacing the Airtac SI50 Standard Cylinder SI50AX95 with the SAI50AX95
To replace the SI50AX95, order SAI50AX95. Confirm the ISO 15552 mounting interface, 50mm bore, 95mm stroke, G1/4 port, and SUS420J2 stainless rod. Being a non-magnet SKU, it cannot accept CS1-B/DS1-B sensors. If sizing up or down, neighbour bores 40mm and 63mm offer 628 N and 1559 N push at 0.5 MPa respectively. Because the 95mm stroke is under 300mm, side-load rod-bending risk is minimal. For load holding on air loss, the cushion will not lock the piston; select the SAIL lock or BSAI clamp-lock variant, or add an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX95
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50AX95 FAQ
Yes, the SI50AX95 is discontinued. The direct replacement is the SAI50AX95, which matches the ISO 15552 mounting interface, 50mm bore, 95mm stroke, force, and G1/4 port.
It features a G1/4 port and delivers 982 N push / 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical max of 200 kgf at 1.0 MPa.
Request a Quote for the SAI50AX95
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX95 replacement — usually within 7-8 hours.