This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X50-10, 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 SIJ125X50-10
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X50-10 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 50mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X50-10, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X50-10
- 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 SIJ125X50-10
The AirTAC SIJ125X50-10 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 50 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 10 mm on-site, yielding a usable 40-50 mm extension. The direct replacement is the SAIJ125X50-10, matching the G1/2 port, M27x2 rod thread, and 40 mm adjustable cushion.
The SAIJ successor retains the ISO 15552 mounting interface for direct hardware reuse and upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. Note this non-magnetic SKU cannot take a switch, and the stop screw sets end position—it is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X50-10 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X50-10 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X50-10 |
| Bore size | Ø125 mm |
| Stroke | 50 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 SAIJ125X50-10 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 SAIJ125X50-10 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 SIJ125X50-10
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 SIJ125X50-10 Is Used
Press Fit Tuning
Field-trim the 40-50 mm extend stroke by up to 10 mm to set exact bearing insertion depth without swapping cylinders on the line.
Divertor Stop Adjustment
Dial in the actuator end position on-site to accommodate varying package sizes, using the external stop screw to shorten the extend stroke.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X50-10 with the SAIJ125X50-10
To replace the discontinued SIJ125X50-10, order the direct replacement SAIJ125X50-10, which preserves the 10 mm adjust window, 50 mm max stroke, and G1/2 port. Choose the 10 mm adjust window when you need precise on-site end-position tuning of the extend stroke. Mounting options include FA, LB, and TC brackets. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch. Since the 50 mm stroke is under 300 mm, side-load rod deflection is minimal. Remember the stop screw is not a lock; for load holding on air loss, specify an external rod lock or pilot-operated check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X50-10
- ✓ 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 SIJ125X50-10 FAQ
Yes, the SIJ125X50-10 is discontinued. The direct replacement is the SAIJ125X50-10, offering the same ISO 15552 interface, 125 mm bore, 50 mm stroke, and 10 mm adjust window.
The external stop screw allows trimming the extend stroke by up to 10 mm on-site, but it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X50-10
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X50-10 replacement — usually within 7-8 hours.