This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX10, 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 SI50AX10
The AirTAC Airtac SI50 Standard Cylinder SI50AX10 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 10mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50AX10, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke10 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50AX10
- 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 SI50AX10
The AirTAC SI50AX10 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 10mm stroke. It delivers a thrust of 982 N at 0.5 MPa, utilizing a G1/4 air port and an M16x1.5 rod thread. Because this legacy unit is end-of-life, AirTAC specifies the SAI50AX10 as the direct replacement, retaining the identical interface, force, and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. This specific SKU lacks a magnet (-S), so it cannot accept a CS1-B/DS1-B sensor. The -A suffix denotes a SUS420J2 stainless steel rod for corrosion resistance.
Airtac SI50 Standard Cylinder SI50AX10 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX10 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX10 |
| Bore size | Ø50 mm |
| Stroke | 10 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 SAI50AX10 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 SAI50AX10 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 SI50AX10
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×10 | 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 SI50AX10 Is Used
Short-Stroke Clamping
Ideal for holding lightweight machined parts in fixture assemblies using the 982 N push force at 0.5 MPa within a tight 10mm travel.
Ejector Mechanism
Provides rapid part ejection from automated tooling, operating at speeds up to 800 mm/s with the upgraded SAI piston seal.
Corrosive Environment Actuation
The SUS420J2 stainless rod option makes this 50mm bore cylinder suitable for packaging lines where moisture or mild chemicals are present.
Replacing the Airtac SI50 Standard Cylinder SI50AX10 with the SAI50AX10
To replace the SI50AX10, order the SAI50AX10 and verify the ISO 15552 mounting dimensions, G1/4 port, and M16x1.5 thread. Because this is a non-magnetized SKU, it cannot support position sensing; if detection is required, select an SAI50X10S and add a current AirTAC switch. For sizing alternatives, the neighboring 40mm bore yields 628 N push at 0.5 MPa, while the 63mm bore offers 1559 N. Note that a plain cylinder drifts without live air—the cushion only decelerates at stroke end—so use an external pilot check valve or the SAIL/BSAI lock variant for load holding. The SUS420J2 rod is standard on this -A variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX10
- ✓ 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 SI50AX10 FAQ
Yes, the AirTAC SI50AX10 is discontinued. The direct replacement is the SAI50AX10. It shares the same ISO 15552 mounting interface, 50mm bore, 10mm stroke, G1/4 port, and output force, fitting directly into existing fixtures.
This double-acting cylinder uses a G1/4 air port. It generates a push force of 982 N and a pull force of 825 N at 0.5 MPa. At 0.7 MPa the push is 1374 N, and the theoretical maximum force is 200 kgf at 1.0 MPa.
Request a Quote for the SAI50AX10
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX10 replacement — usually within 7-8 hours.