This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X80-40, 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 SIJ125X80-40
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X80-40 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 SAIJ125X80-40, 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 → SAIJ125X80-40
- 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 SIJ125X80-40
The AirTAC SIJ125X80-40 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 40 mm on-site, giving a usable 40-80 mm stroke from the 80 mm nominal maximum.
The direct replacement is the SAIJ125X80-40, retaining the same ISO 15552 mounting interface, force, and adjust window. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note this non-magnet SKU cannot take a switch, and the stop sets position only—it is not a load lock.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-40 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X80-40 |
| 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 SAIJ125X80-40 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 SAIJ125X80-40 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 SIJ125X80-40
| 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 SIJ125X80-40 Is Used
Press Fit Tuning
Allows operators to fine-tune the extend stroke on-site by up to 40 mm during assembly press operations, ensuring precise bearing seating without swapping cylinders.
Variable Diverter Gates
Adjusts the extend stop position for routing different package sizes on a sorting line, providing a 40 to 80 mm reach window to accommodate varied product profiles.
Carton Forming Stops
Sets exact end positions for folding mechanisms on packaging machines, permitting quick 40 mm stroke reductions to handle multiple carton depths on the same line.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X80-40 with the SAIJ125X80-40
To replace the discontinued SIJ125X80-40, order the direct replacement SAIJ125X80-40, which preserves the 80 mm nominal stroke, 40 mm adjust window, and G1/2 port. Choose the 40 mm adjust window if your extend stroke needs on-site tuning between 40 and 80 mm. Mounting reuses standard ISO 15552 FA, LB, or TC brackets. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch; for sensing, select an SAIJ-S model and use legacy CS1-B or DS1-B sensors. For strokes at or exceeding 300 mm, carefully manage side-load to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X80-40
- ✓ 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 SIJ125X80-40 FAQ
Yes, the SIJ125X80-40 is discontinued. The direct replacement is the SAIJ125X80-40, which shares the same ISO 15552 interface, 125 mm bore, 80 mm stroke, 40 mm adjust window, and G1/2 port. The SAIJ family also uses an upgraded two Y-shaped one-way piston seal for lower start-up pressure and longer life.
This double-acting double-rod cylinder pushes 6136 N and pulls 5734 N at 0.5 MPa; it pushes 8590 N at 0.7 MPa and 11045 N at 0.9 MPa, with a theoretical max of 1251 kgf at 1.0 MPa. Speed is 30-500 mm/s. The external stop screw shortens the extend stroke by up to 40 mm on-site (usable stroke 40-80 mm). Remember the stop sets end position only; it is not a load lock, and a plain cylinder drifts on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X80-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X80-40 replacement — usually within 7-8 hours.