This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X70S, 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 SI200 Standard Cylinder SI200X70S
The AirTAC Airtac SI200 Standard Cylinder SI200X70S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 70mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X70S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke70 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X70S
- 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 SI200 Standard Cylinder SI200X70S
The AirTAC SI200X70S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 70mm stroke. It delivers 15708 N push and 15080 N pull at 0.5 MPa, operating through a G3/4 port with a 40mm rod. The direct replacement is the SAI200X70S, matching the bore, stroke, force, port and ISO 15552 mounting interface.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL and BSAI lock variants absent in the SI line. This -S model has a piston magnet for CS1-B/DS1-B switches; the SAI uses current AirTAC switches.
Airtac SI200 Standard Cylinder SI200X70S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X70S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X70S |
| Bore size | Ø200 mm |
| Stroke | 70 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI200X70S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
The SAI200X70S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI200 Standard Cylinder SI200X70S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×70 | 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 SI200 Standard Cylinder SI200X70S Is Used
Heavy Stamp Press
Generates 15708 N at 0.5 MPa to drive large metal forming and stamping presses requiring immense peak force.
Industrial Gate Valve
Actuates massive flow control gates in processing plants, utilising the 40mm rod and G3/4 air supply.
Replacing the Airtac SI200 Standard Cylinder SI200X70S with the SAI200X70S
To replace the SI200X70S, order the SAI200X70S. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the G3/4 port thread (PT, G or NPT), and the -S magnet requirement. The 70mm stroke is well within the 1500mm maximum, so no side-load guide issues apply here. Sizing both ways: a neighbouring 160mm bore yields 10053 N push at 0.5 MPa, while this 200mm bore hits 21991 N at 0.7 MPa. Remember, a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. Rod material options include carbon steel, SUS420J2 (A) or SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X70S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI200 Standard Cylinder SI200X70S FAQ
Yes, the SI200X70S is discontinued. The direct replacement is the SAI200X70S. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 70mm stroke, output force, G3/4 port and mounting accessories.
The SI200X70S delivers 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and a theoretical max of 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s. It uses a 40mm rod, M36x2 thread, and 50mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X70S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X70S replacement — usually within 7-8 hours.