This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X220-50, 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 SIJ125X220-50
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X220-50 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 SAIJ125X220-50, 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 → SAIJ125X220-50
- 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 SIJ125X220-50
The AirTAC SIJ125X220-50 is a double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 220 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, giving a usable range of 170-220 mm. As this SIJ model is discontinued, the direct replacement is the SAIJ125X220-50, matching the interface, force, and mounting.
The SAIJ successor retains the ISO 15552 mounting dimensions for direct reuse of FA, LB, and TC brackets, and upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note this SKU has no -S magnet and cannot take a switch; the stop screw sets end position but is not a load lock, so use an external rod lock for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X220-50 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X220-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X220-50 |
| 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 SAIJ125X220-50 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 SAIJ125X220-50 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 SIJ125X220-50
| 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 SIJ125X220-50 Is Used
Press Fit Tuning
Allows operators to dial in the exact extend stroke on-site for pressing bearings, compensating for material thickness variations without changing the cylinder.
Variable Length Diverter
Adjusts the extend stop position to deflect different package sizes on a conveyor line, providing flexibility for changing product dimensions.
Adjustable End Stop Pusher
Sets precise pusher endpoints for palletizing or sorting tasks where the required actuation distance changes between production runs.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X220-50 with the SAIJ125X220-50
To replace the discontinued SIJ125X220-50, order the SAIJ125X220-50 direct, which preserves the 220 mm stroke, 50 mm adjust window, G1/2 port, and 125 mm bore. Select the 50 mm adjust window if your setup requires trimming the extend stroke down to 170 mm on-site. Mounting interfaces include Basic, FA, LB, and TC. Because this SKU lacks the -S magnet, it cannot accept a magnetic switch; if sensing is required, specify an SAIJ-S model. For strokes of 300 mm or longer, verify side-load limits to prevent excessive guide wear. Remember the adjust screw sets end position only and does not hold loads on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X220-50
- ✓ 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 SIJ125X220-50 FAQ
Yes, the SIJ125X220-50 is discontinued. The direct replacement is the SAIJ125X220-50, which shares the same ISO 15552 interface, 125 mm bore, 220 mm stroke, 50 mm adjust window, and G1/2 port. The SAIJ family also features an upgraded piston seal for longer life.
The external stop screw offers a 50 mm adjust window, allowing the extend stroke to be shortened from 220 mm down to 170 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X220-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X220-50 replacement — usually within 7-8 hours.