This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X220-20S, 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 SIJ125X220-20S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X220-20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 220mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X220-20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke220 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X220-20S
- 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 SIJ125X220-20S
The AirTAC SIJ125X220-20S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125mm bore and 220mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 20mm on-site, yielding a usable 200-220mm extension window. The direct replacement is the SAIJ125X220-20S, sharing the same interface, force, and mounting.
The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Remember the stop screw sets the end position but is not a load lock; use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X220-20S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X220-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X220-20S |
| Bore size | Ø125 mm |
| Stroke | 220 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 SAIJ125X220-20S 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 SAIJ125X220-20S 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 SIJ125X220-20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×220 | 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 SIJ125X220-20S Is Used
Press Fit Calibration
Fine-tune the 200-220mm extend stroke on-site to dial in precise press-fit depths for bearings without machining custom spacers.
Variable Carton Sealing
Adjust the extend endpoint by up to 20mm to accommodate fluctuating carton heights on a packaging line while maintaining full clamping force.
Pallet Positioning Stops
Set exact stopping positions for varying pallet widths, using the external stop screw to modify the extend endpoint quickly between production runs.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X220-20S with the SAIJ125X220-20S
To replace the discontinued SIJ125X220-20S, order the direct replacement SAIJ125X220-20S, retaining the same ISO 15552 mounting interface, 220mm stroke, 20mm adjust window, and G1/2 port. Choose the 20mm adjust window if your extend stroke needs on-site tuning between 200-220mm. Mounting options include FA, LB, and TC brackets. The -S suffix provides a piston magnet for position sensing. For strokes of 300mm or longer, verify side-load limits to prevent excessive guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X220-20S
- ✓ 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 SIJ125X220-20S FAQ
Yes, the SIJ125X220-20S is discontinued. The direct replacement is the SAIJ125X220-20S, which shares the same ISO 15552 interface, 125mm bore, 220mm stroke, 20mm adjust window, G1/2 port, and mounting options.
The external stop screw allows you to trim the extend stroke by up to 20mm on-site (usable range 200-220mm). The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X220-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X220-20S replacement — usually within 7-8 hours.