This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X195, 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 SI50X195
The AirTAC Airtac SI50 Standard Cylinder SI50X195 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 195mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X195, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke195 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X195
- 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 SI50X195
The AirTAC SI50X195 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 195mm stroke, delivering 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50X195 direct replacement, matching the exact mounting interface, bore, force, and port size for seamless fixture integration.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Because this specific SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors. Note that plain cylinders drift without live air; use the SAIL or BSAI lock variants for load holding.
Airtac SI50 Standard Cylinder SI50X195 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X195 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X195 |
| Bore size | Ø50 mm |
| Stroke | 195 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 SAI50X195 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 SAI50X195 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 SI50X195
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×195 | 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 SI50X195 Is Used
Package Diverting
Actuates routing gates on packaging lines where 982N push force easily deflects medium-weight cartons.
Light Pressing
Provides consistent downward pressure for assembling small bushings or pins with a 50kg safe vertical lift capacity.
Pallet Stops
Functions as a pneumatic stop in conveyor endpoints, securely halting pallets up to 589N safely.
Replacing the Airtac SI50 Standard Cylinder SI50X195 with the SAI50X195
To replace the SI50X195, order the SAI50X195 and verify the ISO 15552 interface, G1/4 port thread (PT/G/NPT), and mounting accessory (LB, FA, TC, etc.). Since this SKU has no -S magnet, it cannot support position sensing; order a magnet-equipped SAI if switches are needed. For sizing, the 50mm bore yields 982N push at 0.5MPa; dropping to a 40mm bore gives 628N, while a 63mm bore provides 1559N. Remember, a standard cylinder does not hold load on air loss—the cushion only decelerates—so specify SAIL or BSAI lock variants, or an external pilot check valve, for vertical loads. At 195mm stroke, side-load and rod-bending risks are low, but proper guide alignment is still advised.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X195
- ✓ 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 SI50X195 FAQ
Yes, the SI50X195 is discontinued. The direct replacement is the AirTAC SAI50X195. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 195mm stroke, G1/4 port, and mounting interface.
The 50mm bore features a G1/4 air port and M16x1.5 rod thread. Force output is 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and 1767N push at 0.9MPa, with a theoretical maximum of 200 kgf at 1.0 MPa.
Request a Quote for the SAI50X195
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X195 replacement — usually within 7-8 hours.