This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X35-30, 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 SIJ50X35-30
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X35-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 35mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ50X35-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke35 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ50X35-30
- 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 SIJ50X35-30
The AirTAC SIJ50X35-30 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 5-35 mm window from the 35 mm nominal maximum. As this SIJ model is end-of-life, the direct replacement is the SAIJ50X35-30, matching the interface, force, and mounting.
The SAIJ successor retains the ISO 15552 mounting interface for direct reuse of FA, LB, and TC brackets, and upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Because this specific SKU lacks a -S magnet, it cannot accept a magnetic switch. The external stop sets the end position but is not a load lock; on air loss the piston drifts, so use an external rod lock or check valve for held loads.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X35-30 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X35-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X35-30 |
| Bore size | Ø50 mm |
| Stroke | 35 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 SAIJ50X35-30 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 SAIJ50X35-30 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 SIJ50X35-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×35 | 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 SIJ50X35-30 Is Used
Short-Stroke Clamping
Adjustable 5-35 mm extend tuning lets operators set exact clamping contact on varying workpiece heights without swapping cylinders.
Transfer Diverter
Field-trim the extend stop to change the diverter gate angle on-site, accommodating new product sizes on the packaging line.
Light Pressing
Dial in a precise 5-35 mm pressing depth for bearing insertion or pin seating, ensuring the end position is repeatable.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X35-30 with the SAIJ50X35-30
To replace the discontinued SIJ50X35-30, order the direct replacement SAIJ50X35-30, matching the 50 mm bore, 35 mm nominal stroke, and 30 mm adjust window. The -30 mm adjust window is ideal when final extend position needs on-site tuning from 5 to 35 mm. Mounting uses standard FA, LB, or TC brackets. Without a -S suffix, this SKU has no magnet and cannot take sensors. For strokes at or above 300 mm, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X35-30
- ✓ 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 SIJ50X35-30 FAQ
Yes, the SIJ50X35-30 is discontinued. The direct replacement is the SAIJ50X35-30, offering the same ISO 15552 interface, 50 mm bore, 35 mm stroke, 30 mm adjust window, and G1/4 port.
The external stop screw provides a 30 mm adjust window, shortening the 35 mm nominal extend stroke down to 5 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X35-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X35-30 replacement — usually within 7-8 hours.