This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X80-40S, 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 SIJ125X80-40S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X80-40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 80mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X80-40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X80-40S
- 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 SIJ125X80-40S
The AirTAC SIJ125X80-40S is a 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 40-80 mm window from the 80 mm nominal maximum. This SIJ series is discontinued; the direct replacement is the SAIJ125X80-40S, matching the ISO 15552 mounting interface, force, and adjust window.
The SAIJ upgrade introduces an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. The stop screw sets the end position but is not a lock; loads drift on air loss, so use an external rod lock or SAIL/BSAI variant for holding. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-40S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X80-40S |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAIJ125X80-40S 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 SAIJ125X80-40S 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 SIJ125X80-40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SIJ125X80-40S Is Used
Press Fit Tuning
Allows operators to dial in the exact 40-80 mm extend position for inserting bearings without machining hard stops.
Divertor Gate Adjustment
Fine-tunes the actuator reach on sorting lines where package sizes vary and the extend endpoint must be set on-site.
Sealing Head Calibration
Provides adjustable end-position control for packaging machines that need precise top-down stroke trimming.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-40S with the SAIJ125X80-40S
To replace the discontinued SIJ125X80-40S, order the direct replacement SAIJ125X80-40S, which retains the 40 mm adjust window, 80 mm nominal stroke, and G1/2 port. Choose the 40 mm adjust window if your extend stroke needs on-site tuning between 40 and 80 mm. Mounting options include FA, LB, and TC brackets. The -S suffix includes a piston magnet for position sensing. For stroke lengths of 300 mm or greater, verify side-load limits to prevent excessive guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X80-40S
- ✓ 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 SIJ125X80-40S FAQ
Yes, the SIJ125X80-40S is discontinued. The direct replacement is the SAIJ125X80-40S. It shares the same ISO 15552 interface, 125 mm bore, 80 mm stroke, 40 mm adjust window, G1/2 port, and mounting options, while adding an upgraded piston seal.
The theoretical max is 1251 kgf at 1.0 MPa. The external stop screw provides a 40 mm adjust window, allowing you to trim the 80 mm nominal extend stroke down to 40 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X80-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X80-40S replacement — usually within 7-8 hours.