This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X800-40S, 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 SIJ125X800-40S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X800-40S 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 SAIJ125X800-40S, 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 → SAIJ125X800-40S
- 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 SIJ125X800-40S
The AirTAC SIJ125X800-40S 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 40 mm on-site, giving a usable 760-800 mm window from the 800 mm nominal maximum. It features a 32 mm rod, M27x2 thread, 40 mm adjustable cushions, and a G1/2 port. The direct replacement is the SAIJ125X800-40S, sharing the same interface, force, and mounting.
The SAIJ successor upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. Remember 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 SIJ125X800-40S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X800-40S |
| 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 SAIJ125X800-40S 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 SAIJ125X800-40S 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 SIJ125X800-40S
| 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 SIJ125X800-40S Is Used
Press Tonnage Calibration
Needs field stroke tuning to dial in the exact 760-800 mm extend endpoint during light-duty press setup, preventing over-travel on varying workpiece heights.
Pallet Stopper Adjustment
Requires on-site stroke trimming to accommodate different pallet depths, using the 40 mm stop screw to precisely set the blocking position without repositioning the cylinder.
Variable Height Indexing
Demands adjustable end-of-stroke positioning for indexing different package sizes, allowing operators to shorten the extend stroke on-site to match the required push-off distance.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X800-40S with the SAIJ125X800-40S
To replace the discontinued SIJ125X800-40S, order the direct replacement SAIJ125X800-40S, which preserves the ISO 15552 mounting interface, G1/2 port, and 40 mm adjust window. Choose the 40 mm adjust window if your extend stroke needs on-site tuning between 760 mm and 800 mm. Reuse existing FA, LB, or TC mounts. The -S magnet supports legacy CS1-B/DS1-B sensors. Because the 800 mm stroke is long, verify side-load limits and use external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X800-40S
- ✓ 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 SIJ125X800-40S FAQ
Yes, the SIJ125X800-40S is discontinued. The direct replacement is the SAIJ125X800-40S. It shares the same ISO 15552 interface, 125 mm bore, 800 mm stroke, 40 mm adjust window, G1/2 port, and mounting options, but adds an upgraded Y-shaped piston seal.
The external stop screw provides a 40 mm adjust window, allowing you to trim the extend stroke on-site from the 800 mm maximum down to 760 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X800-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X800-40S replacement — usually within 7-8 hours.