This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X125-75S, 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 SIJ125X125-75S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X125-75S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X125-75S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X125-75S
- 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 SIJ125X125-75S
The AirTAC SIJ125X125-75S 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 75 mm on-site, giving a usable 50-125 mm window from the 125 mm nominal maximum. The stop screw sets the end position and is not a load lock.
The direct replacement is the SAIJ125X125-75S, reusing your ISO 15552 mounting and M27x2 rod. The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-75S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-75S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X125-75S |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAIJ125X125-75S 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 SAIJ125X125-75S 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 SIJ125X125-75S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SIJ125X125-75S Is Used
Press Fit Tuning
Allows operators to dial in the exact 50-125 mm extend contact point on-site for pressing bearings without machining hard stops.
Variable Length Diverter
Adjusts the extend stroke up to 75 mm to deflect varying package sizes on a conveyor line without swapping the cylinder.
Adjustable Sealing Head
Trims the extend stroke to match different carton depths on-site, ensuring consistent sealing pressure across product changeovers.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-75S with the SAIJ125X125-75S
To replace this discontinued model, order SAIJ125X125-75S (insert A after S); it matches the 125 mm bore, 75 mm adjust window, G1/2 port, and FA/LB/TC mountings. Choose the 75 mm adjust window if you need on-site tuning; for fixed points, a standard SAI avoids stop-screw overhang. The -S suffix provides a piston magnet for CS1-B/DS1-B switches. For strokes >=300 mm, verify side-load guide tolerance. A plain cylinder drifts on air loss; for held loads use SAIL/BSAI or an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X125-75S
- ✓ 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 SIJ125X125-75S FAQ
Yes, the SIJ125X125-75S is discontinued. The direct replacement is the SAIJ125X125-75S. It shares the same ISO 15552 interface, 125 mm bore, 75 mm adjust window, G1/2 port, and mountings, but adds an upgraded two Y-shaped one-way piston seal.
The external stop screw trims the extend stroke by up to 75 mm on-site (usable 50-125 mm). It sets end position only and is not a load lock; use SAIL/BSAI or an external rod lock for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X125-75S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X125-75S replacement — usually within 7-8 hours.