This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ100X25-20, 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X25-20
The AirTAC SIJ100 Double Rod Adjustable Cylinder SIJ100X25-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 25mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ100X25-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ100X25-20
- 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X25-20
The AirTAC SIJ100X25-20 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, discontinued and replaced direct by the SAIJ100X25-20. It uses an external stop screw to trim the extend stroke by up to 20 mm on-site, yielding a usable 5-25 mm extend window from the 25 mm nominal maximum. The G1/2 port and M20x1.5 rod end are fixed by the bore.
Upgrading to the SAIJ retains the exact ISO 15552 mounting interface but adds an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S), so it cannot take a switch. The stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X25-20 Technical Specifications
| Model | Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X25-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ100X25-20 |
| Bore size | Ø100 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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 SAIJ100X25-20 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAIJ100X25-20 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X25-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×25 | 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X25-20 Is Used
Short-Stroke Clamping
Applying a 3927 N clamping force at 0.5 MPa where the exact material thickness varies slightly, using the 20 mm stop screw to dial in the final 5-25 mm extend position on-site.
Adjustable Stop Block
Acting as a pneumatic stop in a machining cell where the protrusion distance requires occasional field adjustment, using the external screw rather than mechanical shims.
Replacing the Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X25-20 with the SAIJ100X25-20
To replace the discontinued SIJ100X25-20, order the exact SAIJ100X25-20 direct: it preserves the 100 mm bore, 25 mm stroke, 20 mm adjust window, G1/2 port, and ISO 15552 mounting. Choose the 20 mm adjust window if your assembly requires field tuning of the extend end position within a 5-25 mm range. Mounting options include Basic, FA, LB, and TC. Because this specific SKU has no -S magnet, it cannot accept legacy CS1-B/DS1-B sensors; confirm if sensing is needed. For stroke lengths >=300 mm, verify side-load guidance to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ100X25-20
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X25-20 FAQ
Yes, the SIJ100X25-20 is discontinued. The direct replacement is the SAIJ100X25-20. It shares the identical ISO 15552 interface, 100 mm bore, 25 mm nominal stroke, 20 mm adjust window, G1/2 port, and mounting options, but features an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw allows you to trim the extend stroke by up to 20 mm on-site, giving a usable 5-25 mm extend window. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ100X25-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ100X25-20 replacement — usually within 7-8 hours.