This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X800-30, 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X800-30
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X800-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 800mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ50X800-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ50X800-30
- 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X800-30
The AirTAC SIJ50X800-30 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 50 mm bore and 800 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 770-800 mm end position. This SIJ model is discontinued; the direct replacement is the SAIJ50X800-30, matching the interface, force, and adjust window.
The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note this SKU lacks a -S magnet, so it cannot take a magnetic switch. The stop screw sets end position only; it is not a load lock, so use an external rod lock for held loads.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X800-30 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X800-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X800-30 |
| Bore size | Ø50 mm |
| Stroke | 800 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ50X800-30 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAIJ50X800-30 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X800-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×800 | 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X800-30 Is Used
Variable-Length Ejector
Tuning the extend stop on-site by up to 30 mm lets operators adjust part ejection distance without swapping cylinders on a long-stroke assembly line.
Adjustable Transfer Pusher
A 770-800 mm extend window accommodates varying product lengths on a conveyor, using the external screw to set the exact push-off point.
Custom-Depth Diverter
Field-trimming the extend stroke allows a diverter arm to match varying pallet depths precisely without disassembling the 800 mm actuator.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X800-30 with the SAIJ50X800-30
To replace the discontinued SIJ50X800-30, order the direct replacement SAIJ50X800-30, which preserves the 50 mm bore, 800 mm nominal stroke, 30 mm adjust window, G1/4 port, and mounting interfaces. Choose the 30 mm adjust window if you need 770-800 mm of extend travel. Mounting options include FA, LB, and TC brackets. Because this is a non-magnetized SKU, it cannot accept legacy CS1-B or DS1-B sensors. For the 800 mm stroke, use external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X800-30
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X800-30 FAQ
Yes, the SIJ50X800-30 is discontinued. The direct replacement is the SAIJ50X800-30, offering the same ISO 15552 interface, 50 mm bore, 800 mm stroke, 30 mm adjust window, and G1/4 port.
The external stop screw window is 30 mm, allowing an extend stroke range of 770-800 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X800-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X800-30 replacement — usually within 7-8 hours.