This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X1000SFTC, 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 SI50X1000SFTC
The AirTAC SI50 Standard Cylinder SI50X1000SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1000mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X1000SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1000 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X1000SFTC
- 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 SI50X1000SFTC
The AirTAC SI50X1000SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 1000mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI50X1000SFTC, matching the exact interface, force, and FTC trunnion mount.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The -S magnet pairs with CS1-B/DS1-B sensors, and Viton H seals raise heat to 150C.
Airtac SI50 Standard Cylinder SI50X1000SFTC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X1000SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X1000SFTC |
| Bore size | Ø50 mm |
| Stroke | 1000 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 SAI50X1000SFTC 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 SAI50X1000SFTC 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 SI50X1000SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×1000 | 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 SI50X1000SFTC Is Used
Long-Stroke Material Transfer
Pushes workpieces between machining stations over a 1000mm span where 982N at 0.5MPa handles standard pallet weights.
High-Bay Ejection
Extends 1000mm to eject packaged goods from vertical storage racks, requiring external guides to manage rod bending.
Replacing the Airtac SI50 Standard Cylinder SI50X1000SFTC with the SAI50X1000SFTC
To replace the SI50X1000SFTC, order the SAI50X1000SFTC. Confirm the ISO 15552 FTC trunnion mount, 50mm bore, 1000mm stroke, G1/4 port, and -S magnet for CS1-B/DS1-B switches. Sizing options: step up to bore 63 for 1559N push at 0.5MPa, or down to bore 40 for 628N. Note that plain cylinders drift without live air; for load holding use an external pilot check valve or the SAIL/BSAI lock variants. At 1000mm stroke, use an external guide to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X1000SFTC
- ✓ 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 SI50X1000SFTC FAQ
Yes, the SI50X1000SFTC is discontinued. The direct replacement is the SAI50X1000SFTC. It is dimensionally interchangeable per ISO 15552, keeping the same 50mm bore, 1000mm stroke, G1/4 port, FTC mount, and output force.
The G1/4 port feeds a 50mm bore yielding 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical max of 200kgf at 1.0MPa. The 1000mm stroke requires external guides to prevent side-load damage.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X1000SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X1000SFTC replacement — usually within 7-8 hours.