This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X930S, 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 SI50X930S
The AirTAC Airtac SI50 Standard Cylinder SI50X930S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 930mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X930S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke930 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X930S
- 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 SI50X930S
The AirTAC SI50X930S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 930mm stroke. Delivering 982N push force at 0.5MPa, it features a G1/4 port, M16x1.5 rod thread, and a built-in magnet for CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI50X930S—a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, and force.
The SAI replacement retains all mechanical ratings but introduces an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. For applications needing load holding on air loss, the new SAI family offers SAIL and BSAI lock variants the SI lacked.
Airtac SI50 Standard Cylinder SI50X930S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X930S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X930S |
| Bore size | Ø50 mm |
| Stroke | 930 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 SAI50X930S 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 SAI50X930S 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 SI50X930S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×930 | 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 SI50X930S Is Used
Long-Stroke Diversion
Pushes packages or workpieces across a 930mm gap on packaging lines where the 982N thrust at 0.5MPa easily overcomes friction.
Vertical Material Lift
Raises lightweight totes or bins up to 50kg using the full extension, requiring external guides to prevent rod bending on the 930mm stroke.
Pneumatic Press Ejection
Cycles finished parts out of a press area, utilizing the 30mm adjustable air cushions at both ends to decelerate the moving load.
Replacing the Airtac SI50 Standard Cylinder SI50X930S with the SAI50X930S
To replace the SI50X930S, order the SAI50X930S. Confirm your existing ISO 15552 mounting fixture (LB, FA, TC, etc.), the G1/4 air port, and the M16x1.5 rod thread. Because this is a long 930mm stroke, external guides are strongly recommended to prevent rod bending and side-load damage. For sizing both ways: neighboring bores are 40mm (628N push @0.5MPa) and 63mm (1559N push @0.5MPa). Note that a plain cylinder does not hold load without live air—the cushions only decelerate. If you need static holding, use an external pilot check valve or the SAIL/BSAI lock variant. The -S magnet on this SKU supports legacy CS1-B/DS1-B switches, while the SAI uses current AirTAC sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X930S
- ✓ 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 SI50X930S FAQ
Yes, the SI50X930S is discontinued. The direct replacement is the SAI50X930S. It shares the identical ISO 15552 mounting interface, 50mm bore, 930mm stroke, output force, and G1/4 port, fitting directly into existing fixtures.
The bore is 50mm with a G1/4 air port. Force ratings are 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and 1767N push at 0.9MPa. The theoretical maximum force is 200kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X930S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X930S replacement — usually within 7-8 hours.