This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID200X350S, 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 SID Series Double-Rod Cylinder SID200X350S
The AirTAC Airtac SID Series Double-Rod Cylinder SID200X350S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 350mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID200X350S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke350 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAID200X350S
- 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 SID Series Double-Rod Cylinder SID200X350S
The AirTAC SID200X350S is a discontinued double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston. This configuration means both faces use the rod-side area, yielding equal force both ways: 15080 N at 0.5 MPa, 21110 N at 0.7 MPa, and 27141 N at 0.9 MPa. The bore is 200 mm, the piston rod is 40 mm, the rod-end thread is M36x2, and the air port is G3/4. It includes a 50 mm adjustable air cushion at each end, operates at 30-500 mm/s, and features a built-in piston magnet (-S) for legacy CS1-B/DS1-B switches.
As the SID line is end-of-life, the direct replacement is the SAID200X350S, which reuses the same ISO 15552 mounting interface, bore, stroke, and G3/4 port. The SAI replacement upgrades the piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. Note that a plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SID Series Double-Rod Cylinder SID200X350S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID200X350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID200X350S |
| Bore size | Ø200 mm |
| Stroke | 350 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 SAID200X350S 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 SAID200X350S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SID Series Double-Rod Cylinder SID200X350S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×350 | 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 SID Series Double-Rod Cylinder SID200X350S Is Used
Dual-Tool Transfer
Drives two opposing tools simultaneously from a single piston, utilizing the equal both-ways force to push and pull identical loads without recalibrating pressure.
Anti-Rotation Indexing
The dual-rod geometry prevents mechanical rotation during traverse, maintaining precise alignment for heavy 200 mm bore indexing tasks.
Cam-Driven Sensing
Uses the extended back rod to carry a sensor cam, allowing external position confirmation while the front rod performs the primary work.
Replacing the Airtac SID Series Double-Rod Cylinder SID200X350S with the SAID200X350S
To replace the discontinued SID200X350S, drop in the SAID200X350S directly; it matches the 200 mm bore, 350 mm stroke, G3/4 port, and ISO 15552 mounting dimensions without bracket changes. Select a double-rod cylinder when you need equal force both ways, anti-rotation stability, or a back rod to carry a sensor cam. Because force is equal both ways, sizing is symmetrical: if 21110 N at 0.7 MPa is insufficient, step up to a larger bore, or step down if excessive. Reuse FA, LB, or TC mounts directly. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B switches (the SAI replacement uses current AirTAC switches). For the 350 mm stroke, add external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID200X350S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SID Series Double-Rod Cylinder SID200X350S FAQ
Yes, the SID200X350S is discontinued. The direct replacement is the SAID200X350S. It shares the same ISO 15552 mounting interface, 200 mm bore, 350 mm stroke, G3/4 port, and equal both-ways force, while adding an upgraded Y-shaped piston seal.
Force is equal both ways due to the double-rod design: 15080 N at 0.5 MPa, 21110 N at 0.7 MPa, and 27141 N at 0.9 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID200X350S
Send us the quantity and destination. We confirm price, stock and lead time on the SAID200X350S replacement — usually within 7-8 hours.