This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X110-50S, 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 SIJ125X110-50S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X110-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 110mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X110-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke110 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X110-50S
- 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 SIJ125X110-50S
The AirTAC SIJ125X110-50S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. Its external stop screw lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 60-110 mm extend out of the 110 mm nominal maximum. The direct replacement is the SAIJ125X110-50S, preserving the interface, force, and mounting.
Because the stop screw only sets the end position, it is not a load lock; for held loads use an external rod lock or the SAIL/BSAI variant. The SAIJ upgrade incorporates an improved two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X110-50S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X110-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X110-50S |
| Bore size | Ø125 mm |
| Stroke | 110 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 SAIJ125X110-50S 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 SAIJ125X110-50S 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 SIJ125X110-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×110 | 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 SIJ125X110-50S Is Used
Press Fit Tuning
Allows operators to dial in the exact 60-110 mm extend position for pressing bearings without machining custom spacers.
Variable Carton Sealing
Adapts the extend end-point on the fly for fluctuating package heights, ensuring consistent flap contact.
Adjustable Ejector Stroke
Trims the ejection reach by up to 50 mm to accommodate different product lengths on a shared fixture.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X110-50S with the SAIJ125X110-50S
To replace the discontinued SIJ125X110-50S, order the exact direct replacement SAIJ125X110-50S, which keeps the 125 mm bore, 110 mm stroke, 50 mm adjust window, G1/2 port, and M27x2 rod thread. Choose the 50 mm adjust window if you need to trim the extend stroke down to 60 mm on-site; the stop screw sets end position but does not lock the load. Mounting attachments (FA, LB, TC) reuse the ISO 15552 interface. The -S magnet supports legacy CS1-B/DS1-B switches. For strokes at or above 300 mm, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X110-50S
- ✓ 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 SIJ125X110-50S FAQ
Yes, the SIJ125X110-50S is discontinued. The direct replacement is the SAIJ125X110-50S, sharing the same ISO 15552 interface, 125 mm bore, 110 mm stroke, 50 mm adjust window, and G1/2 port. The SAIJ family also adds upgraded piston seals and lock variants.
The external stop screw provides a 50 mm adjust window, shortening the 110 mm nominal extend stroke down to 60 mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X110-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X110-50S replacement — usually within 7-8 hours.