This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X80-75, 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 SIJ125X80-75
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X80-75 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 SAIJ125X80-75, 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 → SAIJ125X80-75
- 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 SIJ125X80-75
The AirTAC SIJ125X80-75 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder, now discontinued. The direct replacement is the SAIJ125X80-75, matching the 125mm bore, 80mm nominal stroke, G1/2 port, and mounting interface. An external stop screw lets you trim the extend stroke by up to 75mm on-site, yielding a usable extend range of 5-80mm.
The SAIJ successor retains the upgraded SAI piston seal (two Y-shaped one-way elements for low start-up pressure and long life). Note this SKU lacks a -S magnet and cannot take a sensor. The adjust stop sets the end position but is not a lock; for load-holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-75 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X80-75 |
| 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 SAIJ125X80-75 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 SAIJ125X80-75 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 SIJ125X80-75
| 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 SIJ125X80-75 Is Used
Press Fit Tuning
Allows operators to dial in the exact 5-80mm extend position on-site for inserting bearings without changing the entire cylinder setup.
Variable Depth Sealing
Adjusts the extend stroke on packaging lines to accommodate different carton depths, ensuring precise seal placement.
Adjustable End Stop Forming
Provides a tunable mechanical end position for metal forming tasks where the material thickness varies between production runs.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-75 with the SAIJ125X80-75
To replace the discontinued SIJ125X80-75, order the SAIJ125X80-75, which offers an identical ISO 15552 mounting footprint, M27x2 rod thread, and 75mm adjust window. Choose the 75mm adjust window if your extend stroke needs field tuning between 5 and 80mm. Mounting options include Basic, FA, LB, and TC. Because this SKU has no -S suffix, it cannot accept a magnetic switch; if sensing is required, select a -S model (compatible with legacy CS1-B/DS1-B switches). For strokes at or above 300mm, carefully manage side-load to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X80-75
- ✓ 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 SIJ125X80-75 FAQ
Yes, the SIJ125X80-75 is discontinued. The direct replacement is the SAIJ125X80-75. It shares the same ISO 15552 interface, 125mm bore, 80mm stroke, 75mm adjust window, and G1/2 port, but features an upgraded SAI piston seal.
The external stop screw allows you to trim the extend stroke by up to 75mm on-site (usable range 5-80mm). The stop sets the end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X80-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X80-75 replacement — usually within 7-8 hours.