This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X160SFTC, 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 SI50X160SFTC
The AirTAC SI50 Standard Cylinder SI50X160SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 160mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X160SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X160SFTC
- 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 SI50X160SFTC
The AirTAC SI50X160SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore, 160mm stroke, and FTC trunnion mount. Delivering 982 N push force at 0.5 MPa, it features a G1/4 air port, M16x1.5 rod thread, and an integrated magnet for CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI50X160SFTC, a direct sharing the exact ISO 15552 mounting interface, bore, and output force.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. For load-holding, note that standard cylinders drift on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL lock variant.
Airtac SI50 Standard Cylinder SI50X160SFTC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X160SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X160SFTC |
| Bore size | Ø50 mm |
| Stroke | 160 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 SAI50X160SFTC 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 SAI50X160SFTC 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 SI50X160SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×160 | 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 SI50X160SFTC Is Used
Package Diversion
Actuating routing gates on packaging lines where the 982 N push force easily deflects standard cartons.
Pallet Handling
Positioning stops and lifts in automated storage systems using the FTC trunnion mount for pivot articulation.
Replacing the Airtac SI50 Standard Cylinder SI50X160SFTC with the SAI50X160SFTC
To replace the SI50X160SFTC, order the SAI50X160SFTC. Confirm the ISO 15552 FTC trunnion mounting, 50mm bore, 160mm stroke, G1/4 port, and the -S magnet for current AirTAC switches. If sizing up or down, adjacent bores are 40mm (628 N push @0.5 MPa) and 63mm (1559 N push @0.5 MPa). Remember that a plain cylinder does not hold load without live air; the 30mm cushions only decelerate. For secure holding, specify the SAIL air-released lock or BSAI clamp-lock variant. At 160mm stroke, side-load is minimal, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X160SFTC
- ✓ 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 SI50X160SFTC FAQ
Yes, the AirTAC SI50X160SFTC is discontinued. The direct replacement is the SAI50X160SFTC. It shares the identical ISO 15552 mounting interface, 50mm bore, 160mm stroke, G1/4 port, and FTC trunnion mount, fitting existing fixtures perfectly.
The 50mm bore uses a G1/4 air port. Force outputs are: 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N push at 0.9 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa. Speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X160SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X160SFTC replacement — usually within 7-8 hours.