This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX95S, 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 SI50AX95S
The AirTAC SI50 Standard Cylinder SI50AX95S 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 SAI50AX95S, 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 → SAI50AX95S
- 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 SI50AX95S
The AirTAC SI50AX95S is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore, 95 mm stroke, and a SUS420J2 stainless steel piston rod. It delivers 982 N push force at 0.5 MPa and uses a G1/4 port. The direct replacement is the SAI50AX95S, which shares the exact ISO 15552 mounting interface, bore, stroke, output force, and accessories.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors; the SAI replacement uses current AirTAC switches.
Airtac SI50 Standard Cylinder SI50AX95S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX95S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX95S |
| 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 SAI50AX95S 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 SAI50AX95S 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 SI50AX95S
| 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 SI50AX95S Is Used
Stainless Rod Clamping
Ideal for fixturing and clamping tasks where the SUS420J2 rod provides corrosion resistance against coolant mist.
Package Diverting
Provides reliable 95 mm stroke actuation for diverting medium-weight packages on material handling lines.
Vertical Lift Gates
Suitable for raising lightweight access gates or guards, safely handling loads near the 50 kg vertical limit.
Replacing the Airtac SI50 Standard Cylinder SI50AX95S with the SAI50AX95S
To replace the SI50AX95S, order the SAI50AX95S. Confirm your ISO 15552 mounting accessory (LB, FA, CA, TC) and G1/4 port threads match. The -A rod is SUS420J2 stainless steel and the -S magnet enables switch sensing. Sizing both ways: this 50 mm bore yields 982 N push at 0.5 MPa; if undersized, the 63 mm bore offers 1559 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for held loads, or specify the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX95S
- ✓ 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 SI50AX95S FAQ
Yes, the AirTAC SI50AX95S is discontinued. The direct replacement is the SAI50AX95S. It is dimensionally interchangeable per ISO 15552, retaining the same 50 mm bore, 95 mm stroke, G1/4 port, and mounting interface.
At 0.5 MPa it provides 982 N push and 825 N pull force. At 0.7 MPa push is 1374 N, and the theoretical max is 200 kgf at 1.0 MPa. The operating speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50AX95S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX95S replacement — usually within 7-8 hours.