This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X193SN, 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 SI50X193SN
The AirTAC Airtac SI50 Standard Cylinder SI50X193SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 193mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X193SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke193 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X193SN
- 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 SI50X193SN
The AirTAC SI50X193SN is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 193mm stroke. Providing 982N push force at 0.5MPa via a G1/4 port, it is replaced by the SAI50X193SN. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke and output force. The SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure and extended life.
This unit includes a piston magnet for legacy CS1-B/DS1-B sensors and uses an NBR seal rated for -20 to +70C. Note that a plain cylinder drifts without live air; use an external rod lock or the SAIL/BSAI lock variants for secure load holding.
Airtac SI50 Standard Cylinder SI50X193SN Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X193SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X193SN |
| Bore size | Ø50 mm |
| Stroke | 193 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 SAI50X193SN 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 SAI50X193SN 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 SI50X193SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×193 | 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 SI50X193SN Is Used
Package Diversion
Actuates routing gates on packaging lines, utilizing the 982N push force to smoothly redirect moderate-weight cartons at speeds up to 800mm/s.
Clamp Actuation
Provides reliable clamping pressure for machining fixtures. The 50mm bore delivers a safe 589N working load, securing parts without deforming them.
Vertical Lowering
Controls the descent of a 50kg payload via a guided elevator. The 193mm stroke offers precise vertical placement while the adjustable cushion decelerates the load.
Replacing the Airtac SI50 Standard Cylinder SI50X193SN with the SAI50X193SN
To replace the obsolete SI50X193SN, order the SAI50X193SN. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/4 air port, and the M16x1.5 rod thread. The -S denotes a magnet for CS1-B/DS1-B switches, and -N specifies the NBR seal. If you need to resize, neighboring bores are 40mm (628N push @0.5MPa) and 63mm (1559N push @0.5MPa). Because the 193mm stroke is under 300mm, side-load rod-bending risks are minimal, but always guide the load. A standard cylinder does not hold load on air loss; the cushion only decelerates. For holding, use an external pilot check valve or explore the SAIL (air-released lock) and BSAI (clamp-lock) variants the SI line lacked.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X193SN
- ✓ 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 SI50X193SN FAQ
Yes, the SI50X193SN is discontinued. The direct replacement is the SAI50X193SN. It shares the same ISO 15552 mounting interface, 50mm bore, 193mm stroke, output force, and G1/4 port, fitting directly into existing fixtures.
The 50mm bore features a G1/4 air port and an M16x1.5 rod thread. It generates 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical maximum force of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X193SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X193SN replacement — usually within 7-8 hours.