This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X800-30S, 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X800-30S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X800-30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 800mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X800-30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X800-30S
- 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X800-30S
The AirTAC SIJ125X800-30S 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, giving a usable 770-800 mm window from the 800 mm nominal maximum.
The direct replacement is the SAIJ125X800-30S, matching the ISO 15552 mounting interface, bore, stroke, adjust window, and force. The SAIJ family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The stop screw sets end position but is not a lock; use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-30S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X800-30S |
| Bore size | Ø125 mm |
| Stroke | 800 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ125X800-30S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAIJ125X800-30S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X800-30S Is Used
Press Fit Tuning
Final insertion depth of bearings requires field stroke tuning; trim the extend stroke by up to 30 mm on-site to dial in the exact 770-800 mm end position without changing the fixture.
Pallet Stop Adjustment
Variable pallet lengths demand a movable end stop; the external stop screw sets the precise pusher extension while the 125 mm bore supplies 6136 N of firm pushing force at 0.5 MPa.
Carton Flap Folding
Different carton heights need the flap folder to hit a slightly different extend position; the adjustable window provides on-site stroke trimming for precise folding without reprogramming.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-30S with the SAIJ125X800-30S
To replace the discontinued SIJ125X800-30S, order the direct replacement SAIJ125X800-30S, which preserves the G1/2 port, M27x2 rod thread, 800 mm stroke, and 30 mm adjust window. Select the 30 mm adjust window if your field stroke tuning requires trimming the extend by up to 30 mm; the nominal 800 mm remains the maximum. Reuse existing FA, LB, or TC ISO 15552 mounts. The -S suffix indicates a piston magnet for CS1-B/DS1-B switches (the SAIJ uses current AirTAC switches). Because the 800 mm stroke exceeds 300 mm, verify side-load limits and use external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X800-30S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-30S FAQ
Yes, the AirTAC SIJ125X800-30S is discontinued. The direct replacement is the SAIJ125X800-30S. It shares the identical ISO 15552 interface, 125 mm bore, 800 mm stroke, 30 mm adjust window, G1/2 port, and mounting options. The SAIJ family also features an upgraded piston seal for longer life.
The external stop screw provides a 30 mm adjust window, allowing you to trim the extend stroke on-site from the 800 mm maximum down to 770 mm. The stop sets end position only and does not hold the load on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X800-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X800-30S replacement — usually within 7-8 hours.