This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X800-75, 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X800-75
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X800-75 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 SAIJ125X800-75, 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 → SAIJ125X800-75
- 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X800-75
The AirTAC SIJ125X800-75 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 800 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 725-800 mm extend window. The SIJ family is discontinued; the direct replacement is the SAIJ125X800-75, matching the ISO 15552 mounting interface, force, and adjust window.
The SAIJ successor retains the physical interface but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. This non-magnetic SKU cannot accept 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X800-75 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X800-75 |
| 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 SAIJ125X800-75 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 SAIJ125X800-75 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 SIJ125X800-75
| 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 SIJ125X800-75 Is Used
Variable Press Tonnage
Adjusting the extend stop on-site by up to 75 mm allows a large press to accommodate varying material thicknesses without reprogramming the machine cycle.
Length-Specific Diverter
A 125 mm bore diverter on a heavy conveyor can fine-tune its 800 mm extend reach by up to 75 mm to route different pallet sizes accurately.
Adjustable Pallet Stop
An end-of-line pallet stop uses the external screw to shift the final resting position within the 725-800 mm window for mixed product runs.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-75 with the SAIJ125X800-75
To replace the discontinued SIJ125X800-75, order the direct replacement SAIJ125X800-75, keeping the 75 mm adjust window, 800 mm nominal stroke, and G1/2 port. Choose the 75 mm adjust window if you need on-site extend tuning between 725 and 800 mm. Reuse existing FA, LB, or TC ISO 15552 mounts. Because this SKU lacks the -S suffix, it cannot take a magnetic switch. With an 800 mm stroke, minimize side-load and rod-bending by using external guides to support the rod.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X800-75
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-75 FAQ
Yes, the SIJ125X800-75 is discontinued. The direct replacement is the SAIJ125X800-75. It shares the same ISO 15552 interface, 125 mm bore, 800 mm stroke, 75 mm adjust window, G1/2 port, and mounting options, but features an upgraded two Y-shaped one-way piston seal.
The external stop screw allows you to trim the extend stroke by up to 75 mm on-site, giving a usable extend range of 725-800 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X800-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X800-75 replacement — usually within 7-8 hours.