This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX70S, 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 SI200BX70S
The AirTAC Airtac SI200 Standard Cylinder SI200BX70S 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 SAI200BX70S, 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 → SAI200BX70S
- 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 SI200BX70S
The AirTAC SI200BX70S is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 70 mm stroke. Delivering 15708 N of push force at 0.5 MPa, it features a SUS304 stainless piston rod (-B) for corrosion resistance and a built-in magnet (-S) for legacy CS1-B/DS1-B sensors. The direct replacement is the SAI200BX70S, sharing the same G3/4 port, M36x2 thread, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note that a plain cylinder drifts without live air; for held loads, explore the SAIL or BSAI lock variants.
Airtac SI200 Standard Cylinder SI200BX70S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX70S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX70S |
| 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 SAI200BX70S 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 SAI200BX70S 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 SI200BX70S
| 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 SI200BX70S Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 15708 N of push force at 0.5 MPa with stable 70 mm travel.
Washdown Ejector
Ejects parts in humid washdown zones utilizing the -B SUS304 stainless piston rod for corrosion resistance.
Replacing the Airtac SI200 Standard Cylinder SI200BX70S with the SAI200BX70S
To replace the SI200BX70S, order the SAI200BX70S. Verify the ISO 15552 mounting interface, 70 mm stroke, G3/4 port, and the -S magnet for current AirTAC switches. Sizing both ways: a neighbouring 160 mm bore yields 10053 N push at 0.5 MPa, while this 200 mm bore hits 21991 N at 0.7 MPa. Because the cushion only decelerates, use an external rod lock or pilot check valve for load holding. The SUS304 rod option suits corrosive environments, and a Viton H seal extends temperature limits to 150 C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX70S
- ✓ 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 SI200BX70S FAQ
Yes, the AirTAC SI200BX70S is discontinued. The direct replacement is the SAI200BX70S. It is dimensionally interchangeable per ISO 15552, retaining the same 200 mm bore, 70 mm stroke, G3/4 port, and mounting interface.
It features a G3/4 air port. The force ratings are: 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N push at 0.9 MPa, and a theoretical max of 3204 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX70S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX70S replacement — usually within 7-8 hours.