This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX195, 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 SI50AX195
The AirTAC Airtac SI50 Standard Cylinder SI50AX195 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 SAI50AX195, 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 → SAI50AX195
- 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 SI50AX195
The AirTAC SI50AX195 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 195mm stroke. It delivers 982N push force at 0.5MPa. This legacy unit is replaced by the SAI50AX195, a direct upgrade retaining the same G1/4 port, M16x1.5 rod thread and ISO 15552 mounting interface. Note that the 195mm stroke is non-standard; verify exact spacing.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This specific SKU lacks a magnet (-S), so it cannot accept a CS1-B/DS1-B sensor. The -A suffix denotes a SUS420J2 stainless piston rod for corrosion resistance.
Airtac SI50 Standard Cylinder SI50AX195 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX195 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX195 |
| 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 SAI50AX195 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 SAI50AX195 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 SI50AX195
| 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 SI50AX195 Is Used
Package Diverting
Actuates routing gates on packaging lines where the 982N push force easily deflects medium-weight cartons.
Stainless Rod Tooling
The SUS420J2 stainless piston rod suits light machining or washdown environments requiring corrosion resistance.
Vertical Lift Stops
Provides a physical stop for vertical loads up to 50kg, though an external rod lock is needed for safety holding.
Replacing the Airtac SI50 Standard Cylinder SI50AX195 with the SAI50AX195
To replace the SI50AX195, order the SAI50AX195. It drops directly into existing ISO 15552 fixtures with the same 50mm bore, 195mm stroke, G1/4 port and mounting accessories. Because this SKU lacks a magnet, it cannot support position sensing; if sensing is required, select an SAI50X195S instead. For load holding, note that a standard cylinder drifts on air loss—the cushion only decelerates. Use an external pilot check valve or the SAIL/BSAI lock variant. If sizing up or down, neighbouring bores are 40mm (628N push @0.5MPa) and 63mm (1559N push @0.5MPa).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX195
- ✓ 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 SI50AX195 FAQ
Yes, the SI50AX195 is discontinued. The direct replacement is the SAI50AX195. It shares the exact ISO 15552 mounting interface, 50mm bore, 195mm stroke, G1/4 port and output force, fitting existing fixtures perfectly.
This double-acting cylinder has a G1/4 air port. It generates 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical maximum of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50AX195
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX195 replacement — usually within 7-8 hours.