This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X30-30, 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 SIJ50X30-30
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X30-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 30mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ50X30-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke30 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ50X30-30
- 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 SIJ50X30-30
The AirTAC SIJ50X30-30 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued. The direct replacement is the SAIJ50X30-30, matching the 50mm bore, 30mm nominal stroke, G1/4 port, and mounting interface. An external stop screw lets you trim the extend stroke by up to 30mm on-site, setting the precise end position without needing a custom-length cylinder.
The SAIJ successor features an upgraded two Y-shaped one-way piston seal for lower start-up pressure. Note this non-magnetic SKU cannot take a switch, and the stop screw is an end-position setter, not a load lock.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X30-30 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X30-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X30-30 |
| Bore size | Ø50 mm |
| Stroke | 30 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 SAIJ50X30-30 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 SAIJ50X30-30 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 SIJ50X30-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×30 | 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 SIJ50X30-30 Is Used
Short-Stroke Clamping
Adjusts the extend contact point on the fly to clamp parts of varying heights without re-engineering the fixture.
Transfer Diverter
Tunes the actuator reach on a sorting line to deflect packages accurately, accommodating guide rail changes.
Sealing Head Press
Dials in the exact downward travel for sealing film thicknesses, preventing crush damage to delicate cartons.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X30-30 with the SAIJ50X30-30
To replace the SIJ50X30-30, order the SAIJ50X30-30 direct; it preserves the ISO 15552 mounting dimensions for direct FA, LB, or TC bracket reuse. The 30mm adjust window is ideal if your extend stroke needs on-site tuning from 0 to 30mm. Because this SKU lacks the -S magnet, it cannot accept a sensor; confirm if you need legacy CS1-B/DS1-B switches before upgrading. The stop screw sets end position but does not lock the load—use an external rod lock or SAIL/BSAI variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X30-30
- ✓ 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 SIJ50X30-30 FAQ
Yes, the SIJ50X30-30 is discontinued. The direct replacement is the SAIJ50X30-30, offering the same 50mm bore, 30mm stroke, G1/4 port, and ISO 15552 mounting interface. The SAIJ family also adds an upgraded piston seal and new lock variants like SAIL and BSAI.
The external stop screw provides a 30mm adjust window, allowing you to shorten the 30mm extend stroke on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X30-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X30-30 replacement — usually within 7-8 hours.