This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X700-75, 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 SIJ50X700-75
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X700-75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 700mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ50X700-75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke700 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ50X700-75
- 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 SIJ50X700-75
The AirTAC SIJ50X700-75 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued and replaced by the direct replacement SAIJ50X700-75. It features a 50mm bore, G1/4 port, and a 700mm nominal stroke that an external stop screw can shorten on-site by up to 75mm, yielding a usable extend range of 625-700mm. The stop sets the end position and is not a load lock.
The SAIJ upgrade retains the exact ISO 15552 mounting interface but adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Because this SKU lacks a -S magnet, it cannot accept a magnetic switch. Note that on a 700mm stroke, side-load and rod-bending forces require external guides to prevent premature wear.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X700-75 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X700-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X700-75 |
| Bore size | Ø50 mm |
| Stroke | 700 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 SAIJ50X700-75 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 SAIJ50X700-75 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 SIJ50X700-75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×700 | 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 SIJ50X700-75 Is Used
Variable-Length Forming Press
Adjusts the extend stroke on-site by up to 75mm to accommodate different material thicknesses without re-engineering the entire ISO 15552 fixture.
Adjustable Transfer Pusher
Tunes the 700mm extend end-position to handle varying box sizes on a line, using the external stop screw to set precise ejection distances.
Tiered Pallet Stopper
Shortens the extend stroke from the 700mm maximum to adapt to different pallet depths, relying on the stop for end positioning rather than a load lock.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X700-75 with the SAIJ50X700-75
To replace the discontinued SIJ50X700-75, order the direct replacement SAIJ50X700-75, which preserves the 50mm bore, 700mm nominal stroke, 75mm adjust window, G1/4 port, and FA/LB/TC mountings. Choose the 75mm adjust window if your extend stroke needs field tuning between 625mm and 700mm. Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For the 700mm stroke, external guides are recommended to manage side-load and rod-bending. A plain cylinder does not hold loads on air loss; use an external rod lock or SAIL/BSAI variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X700-75
- ✓ 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 SIJ50X700-75 FAQ
Yes, the SIJ50X700-75 is discontinued. The direct replacement is the SAIJ50X700-75. It shares the same ISO 15552 interface, 50mm bore, 700mm stroke, 75mm adjust window, G1/4 port, and mounting options, but features an upgraded piston seal.
The external stop screw window is 75mm, allowing the 700mm extend stroke to be shortened on-site to 625mm. The stop sets end position and is not a lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X700-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X700-75 replacement — usually within 7-8 hours.