This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ200X350-50S, 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 SIJ200 Double Rod Adjustable Cylinder SIJ200X350-50S
The AirTAC SIJ200 Double Rod Adjustable Cylinder SIJ200X350-50S 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 SAIJ200X350-50S, 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 → SAIJ200X350-50S
- 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 SIJ200 Double Rod Adjustable Cylinder SIJ200X350-50S
The AirTAC SIJ200X350-50S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and replaced by the SAIJ200X350-50S. It features a 200mm bore, 350mm nominal stroke, and a G3/4 port. An external stop screw lets you trim the extend stroke by up to 50mm on-site, yielding a usable 300-350mm stroke. The stop sets the end position but is not a load lock.
The SAIJ direct keeps the same ISO 15552 interface, force, and mounting, but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The -S suffix means a piston magnet is present for legacy CS1-B/DS1-B switches. For load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac SIJ200 Double Rod Adjustable Cylinder SIJ200X350-50S Technical Specifications
| Model | Airtac SIJ200 Double Rod Adjustable Cylinder SIJ200X350-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ200X350-50S |
| 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 SAIJ200X350-50S 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 SAIJ200X350-50S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ200 Double Rod Adjustable Cylinder SIJ200X350-50S
| 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 SIJ200 Double Rod Adjustable Cylinder SIJ200X350-50S Is Used
Heavy Press Tonnage
Needs field stroke tuning to set precise 300-350mm pressing depths on large fabricated parts without swapping cylinders.
Oversized Pallet Forming
Requires adjusting the extend end-position on-site to accommodate varying pallet heights during automated assembly.
Large Mold Handling
Demands exact end-stop positioning for heavy mold closures, using the 50mm trim window to dial in the final crush distance.
Replacing the Airtac SIJ200 Double Rod Adjustable Cylinder SIJ200X350-50S with the SAIJ200X350-50S
To replace the discontinued SIJ200X350-50S, order the direct replacement SAIJ200X350-50S; it matches the 200mm bore, 350mm nominal stroke, 50mm adjust window, G3/4 port, and FA/LB/TC mountings. Select the adjust window based on your on-site extend-trim needs: here you can shorten the stroke by up to 50mm. The -S magnet supports legacy CS1-B/DS1-B sensors. Because the 350mm stroke is long, verify side-load limits, rod-bending forces, and use external guides to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ200X350-50S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ200 Double Rod Adjustable Cylinder SIJ200X350-50S FAQ
Yes, the SIJ200X350-50S is discontinued. The direct replacement is the SAIJ200X350-50S, sharing the same ISO 15552 interface, 200mm bore, 350mm stroke, 50mm adjust window, G3/4 port, and mounting options.
The 200mm bore cylinder has a 50mm external stop screw window (usable extend stroke 300-350mm). It uses a G3/4 port and 50mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ200X350-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ200X350-50S replacement — usually within 7-8 hours.