This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X150-75FA, 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 SIJ125X150-75FA
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X150-75FA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 150mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X150-75FA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X150-75FA
- 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 SIJ125X150-75FA
The AirTAC SIJ125X150-75FA is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. It uses an external stop screw to trim the extend stroke by up to 75mm on-site, yielding a usable 75-150mm stroke from the 150mm nominal maximum. The direct replacement is the SAIJ125X150-75FA, retaining the same interface, force, and FA mounting.
The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note this SKU lacks a -S magnet, so it cannot take a magnetic switch. The stop screw sets end position but is not a load lock; for held loads use an external rod lock or SAIL/BSAI variant.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-75FA Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-75FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X150-75FA |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125X150-75FA 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 SAIJ125X150-75FA 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 SIJ125X150-75FA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SIJ125X150-75FA Is Used
Press Fit Tuning
Allows operators to dial in the exact extend stroke on-site for pressing bearings, compensating for material thickness variations without swapping cylinders.
Variable Depth Sealing
Ideal for carton sealing or forming operations where the final extend position must be adjusted within the 75mm window to accommodate different package heights.
End-Of-Line Stop Adjustment
Provides a mechanical external stop to set precise end positions for heavy product diverters, ensuring accurate placement even if pneumatic pressure fluctuates.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-75FA with the SAIJ125X150-75FA
To replace the discontinued SIJ125X150-75FA, order the exact direct replacement SAIJ125X150-75FA, which preserves the 150mm nominal stroke, 75mm adjust window, G1/2 port, and FA mounting interface. Choose the 75mm adjust window if your application requires field-tuning the extend stroke down to a 75mm minimum; remember the stop screw sets the end position and is not a load lock. The FA mount provides fixed front-cap support. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For any stroke over 300mm, carefully manage side-load forces to prevent premature rod seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X150-75FA
- ✓ 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 SIJ125X150-75FA FAQ
Yes, the SIJ125X150-75FA is discontinued. The direct replacement is the SAIJ125X150-75FA, which maintains the same ISO 15552 interface, 125mm bore, 150mm stroke, 75mm adjust window, G1/2 port, and FA mounting. The SAIJ family also adds an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw allows you to trim the extend stroke by up to 75mm on-site, giving a usable extend range of 75-150mm. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X150-75FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X150-75FA replacement — usually within 7-8 hours.