This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X102S, 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 SI50X102S
The AirTAC Airtac SI50 Standard Cylinder SI50X102S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 102mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X102S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke102 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X102S
- 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 SI50X102S
The AirTAC SI50X102S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel, a 50mm bore, and a 102mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50X102S, a direct upgrade retaining the exact mounting interface, bore, stroke, and output force.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors, and the SAI family expands options with SAIL lock, SAIF valve, and BSAI clamp variants.
Airtac SI50 Standard Cylinder SI50X102S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X102S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X102S |
| Bore size | Ø50 mm |
| Stroke | 102 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 SAI50X102S 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 SAI50X102S 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 SI50X102S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×102 | 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 SI50X102S Is Used
Package Diverting
Ideal for actuating routing gates on packaging lines where the 50kg vertical lift capacity easily handles carton redirection.
Clamp Actuation
Provides reliable clamping force for mid-weight machining fixtures, utilizing the 982N thrust at 0.5MPa to secure parts.
Stopper Gates
Deploys pneumatic stoppers on roller conveyors, with the 102mm stroke offering precise physical blocking of pallets.
Replacing the Airtac SI50 Standard Cylinder SI50X102S with the SAI50X102S
To replace the SI50X102S, order the SAI50X102S and confirm your ISO 15552 mounting accessories (LB, FA, TC, etc.), G1/4 port thread (PT/G/NPT), and the M16x1.5 rod-end connection. Because the -S suffix denotes a magnet, ensure you pair the new cylinder with current AirTAC switches if migrating from legacy CS1-B/DS1-B sensors. If you need to adjust the bore, neighboring sizes are 40mm (628N push @0.5MPa) and 63mm (1559N push @0.5MPa). Remember that a standard cylinder does not hold load without live air; the cushions only decelerate. For fail-safe load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X102S
- ✓ 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 SI50X102S FAQ
Yes, the SI50X102S is discontinued. The direct replacement is the AirTAC SAI50X102S. It is dimensionally interchangeable per ISO 15552, matching the 50mm bore, 102mm stroke, G1/4 port, and mounting interface.
This double-acting cylinder uses a G1/4 air port. It generates 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical maximum of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X102S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X102S replacement — usually within 7-8 hours.