This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X1000-20, 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 SIJ125X1000-20
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 1000mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X1000-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X1000-20
- 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 SIJ125X1000-20
The AirTAC SIJ125X1000-20 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 20mm on-site, yielding a usable 980-1000mm stroke from the 1000mm nominal maximum. The stop sets end position only; it is not a load lock.
This SKU is replaced direct by the SAIJ125X1000-20, retaining the ISO 15552 mounting interface, force, and adjust window. The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. Without a -S suffix, this cylinder cannot take a magnetic switch. For load holding on air loss, use an external rod lock or SAIL/BSAI variant, as cushions only decelerate.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X1000-20 |
| Bore size | Ø125 mm |
| Stroke | 1000 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 SAIJ125X1000-20 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 SAIJ125X1000-20 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 SIJ125X1000-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SIJ125X1000-20 Is Used
Press Stroke Calibration
Trimming the extend stroke by up to 20mm on-site allows precise calibration of pressing end positions without machining hard stops.
Transfer Diverter Setup
Field-tuning the extend stroke lets operators adjust diverter arm reach on a transfer line to accommodate varying package widths.
Pallet Positioning Stops
The external stop screw provides a mechanical end-position reference for pallet stops, adjustable within a 20mm window as layout needs evolve.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X1000-20 with the SAIJ125X1000-20
To replace the discontinued SIJ125X1000-20, order the direct replacement SAIJ125X1000-20, matching the 125mm bore, 1000mm stroke, 20mm adjust window, and G1/2 port. Choose the 20mm adjust window if you need fine end-position tuning up to 20mm; for larger trims, pick a bigger adjust figure. Mounting options include Basic, FA, LB, and TC. This non-magnet SKU cannot accept sensors. At 1000mm stroke, mind side-load and rod-bending; use external guides to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X1000-20
- ✓ 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 SIJ125X1000-20 FAQ
Yes, the SIJ125X1000-20 is discontinued. The direct replacement is the SAIJ125X1000-20, which shares the same ISO 15552 interface, 125mm bore, 1000mm stroke, 20mm adjust window, G1/2 port, and mounting options.
The external stop screw window is 20mm, allowing the extend stroke to be shortened from the 1000mm maximum down to 980mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X1000-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X1000-20 replacement — usually within 7-8 hours.