This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ100X250-20, 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 SIJ100X250-20
The AirTAC SIJ100 Double Rod Adjustable Cylinder SIJ100X250-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 250mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ100X250-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ100X250-20
- 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 SIJ100X250-20
The AirTAC SIJ100X250-20 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 20mm on-site, yielding a usable 230-250mm extension out of the 250mm nominal maximum. The direct replacement is the SAIJ100X250-20, retaining the same interface, force, and mounting.
The SAIJ upgrade features a two Y-shaped one-way 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 the external stop sets end position but is not a load lock; the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X250-20 Technical Specifications
| Model | Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X250-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ100X250-20 |
| Bore size | Ø100 mm |
| Stroke | 250 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 SAIJ100X250-20 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 SAIJ100X250-20 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 SIJ100X250-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×250 | 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 SIJ100X250-20 Is Used
Press Fit Tuning
Allows operators to dial in the exact 230-250mm extend position for seating bearings without machining hard stops.
Transfer Diverter
Adjusts the extend endpoint on-site to accommodate varying product widths on a packaging line.
Pallet Stopper
Fine-tunes the physical stop location for different pallet depths prior to stretch wrapping.
Replacing the Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X250-20 with the SAIJ100X250-20
To replace the discontinued SIJ100X250-20, specify the SAIJ100X250-20 direct, keeping the 250mm stroke and 20mm adjust window. Reuse existing FA, LB, or TC ISO 15552 mounts. As this SKU has no -S suffix, it cannot support legacy CS1-B/DS1-B sensors. For stroke lengths of 300mm or more, verify the rod-end side-load limits to prevent guide wear. Remember the adjust screw sets end position and does not hold loads on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ100X250-20
- ✓ 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 SIJ100X250-20 FAQ
Yes, the SIJ100X250-20 is discontinued. The direct replacement is the SAIJ100X250-20, which matches the ISO 15552 interface, 250mm stroke, 20mm adjust window, and G1/2 port. The SAIJ family also adds an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life.
The external stop screw window is 20mm, allowing you to shorten the extend stroke from the 250mm maximum down to 230mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ100X250-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ100X250-20 replacement — usually within 7-8 hours.