This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ80X350-40S, 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-40S
The AirTAC SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ80X350-40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X350-40S
- 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-40S
The AirTAC SIJ80X350-40S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and replaced by the SAIJ80X350-40S. An external stop screw lets you trim the extend stroke by up to 40mm on-site, giving a usable 310-350mm extension out of the 350mm nominal maximum.
The SAIJ direct retains the exact ISO 15552 mounting interface, bore, and force, while upgrading to a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The stop screw sets end position only; it is not a lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-40S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X350-40S |
| Bore size | Ø80 mm |
| Stroke | 350 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ80X350-40S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAIJ80X350-40S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-40S Is Used
Press Fit Tuning
Trimming the extend stroke by up to 40mm on-site allows precise positioning of press fit pins without machining spacers.
Divert Arm Adjustment
Field-tuning the 350mm extension lets operators alter the divert reach on a conveyor belt to handle varying package widths.
Pallet Stop Positioning
The external stop screw adjusts the end position to accommodate different pallet depths without changing the cylinder mount.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-40S with the SAIJ80X350-40S
To replace the discontinued SIJ80X350-40S, order the direct replacement SAIJ80X350-40S, which preserves the 350mm stroke, 40mm adjust window, G3/8 port, and ISO 15552 mounting. The 40mm adjust window is ideal for fine-tuning the extend endpoint without machining. Reuse FA, LB, or TC mounts directly. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches (the SAIJ uses current switches). For the 350mm stroke, ensure external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X350-40S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X350-40S FAQ
Yes, the SIJ80X350-40S is discontinued. The direct replacement is the SAIJ80X350-40S, offering the same ISO 15552 interface, 80mm bore, 350mm stroke, 40mm adjust window, G3/8 port, and force ratings.
The external stop screw window is 40mm, allowing the extend stroke to be shortened from the 350mm maximum down to 310mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X350-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X350-40S replacement — usually within 7-8 hours.