This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X800-10S, 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 SIJ125X800-10S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X800-10S 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 SAIJ125X800-10S, 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 → SAIJ125X800-10S
- 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 SIJ125X800-10S
The AirTAC SIJ125X800-10S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 800 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 10 mm on-site, yielding a usable 790-800 mm extension. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. This SIJ model is discontinued; the direct replacement is the SAIJ125X800-10S, sharing the same ISO 15552 mounting interface, force, and adjust window.
The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The stop screw sets the end position but is not a load lock; the cylinder drifts on air loss. For held loads, use an external rod lock or the SAIL/BSAI variants. At an 800 mm stroke, external guides are recommended to manage rod bending and side loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-10S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-10S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X800-10S |
| 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 SAIJ125X800-10S 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 SAIJ125X800-10S 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 SIJ125X800-10S
| 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 SIJ125X800-10S Is Used
Press Fit Tuning
Final insertion of heavy bearings where a 10 mm external stop trims the extend stroke on-site to hit the exact seating depth without re-plumbing the G1/2 air lines.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-10S with the SAIJ125X800-10S
To replace the discontinued SIJ125X800-10S, specify the direct replacement SAIJ125X800-10S, retaining the 10 mm adjust window, G1/2 port, and ISO 15552 interface. Choose the 10 mm adjust window for fine end-position tuning rather than gross stroke reduction. Mounting options include FA, LB, and TC brackets. The -S magnet supports legacy CS1-B/DS1-B switches. Because the 800 mm stroke exceeds 300 mm, incorporate external guides to prevent rod bending and manage side loads. The stop screw is not a lock; for load holding without live air, specify an external rod lock or pilot-operated check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X800-10S
- ✓ 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 SIJ125X800-10S FAQ
Yes, the AirTAC SIJ125X800-10S is discontinued. The direct replacement is the SAIJ125X800-10S. It shares the same 125 mm bore, 800 mm stroke, 10 mm adjust window, G1/2 port, and ISO 15552 mounting interface, but features an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw provides a 10 mm adjust window, allowing you to trim the extend stroke from 800 mm down to 790 mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X800-10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X800-10S replacement — usually within 7-8 hours.