This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X275-10, 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 SIJ125X275-10
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X275-10 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 275mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X275-10, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke275 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X275-10
- 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 SIJ125X275-10
The AirTAC SIJ125X275-10 is a discontinued double-acting double-rod adjustable-stroke ISO 15552 cylinder. The external stop screw lets you trim the extend stroke by up to 10mm on-site, giving a usable 265-275mm range. The direct replacement is the SAIJ125X275-10, matching the bore, force, port, and mounting.
The SAIJ successor introduces an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note this non-magnetic SKU cannot take a switch, and the stop screw sets end position but is not a load lock; use an external rod lock for holding.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X275-10 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X275-10 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X275-10 |
| Bore size | Ø125 mm |
| Stroke | 275 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 SAIJ125X275-10 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 SAIJ125X275-10 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 SIJ125X275-10
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×275 | 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 SIJ125X275-10 Is Used
Press Fit Tuning
Final insertion of heavy bearing assemblies where the 10mm stop screw window allows operators to dial in the exact 265-275mm extend position without re-engineering the machine layout.
Heavy Load Positioning
Indexing large fabricated components into a welding cell, utilizing the 5734N pull force and the external stop screw to compensate for minor fixture misalignment on-site.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X275-10 with the SAIJ125X275-10
To replace the discontinued SIJ125X275-10, order the direct replacement SAIJ125X275-10, which retains the exact ISO 15552 mounting interface and 10mm adjust window. Select the 10mm adjust window if you only need minor end-position tuning of the 275mm nominal stroke. Reuse FA, LB, or TC mounts directly. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch; add -S if sensing is required. For strokes of 300mm or longer, carefully manage side loads to prevent excessive guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X275-10
- ✓ 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 SIJ125X275-10 FAQ
Yes, the SIJ125X275-10 is discontinued. The direct replacement is the SAIJ125X275-10, which shares the same ISO 15552 interface, 125mm bore, 275mm stroke, 10mm adjust window, G1/2 port, and mounting options. The SAIJ family also features an upgraded piston seal for longer life.
This 125mm bore cylinder features a 10mm external stop screw window, allowing the extend stroke to be shortened from 275mm down to 265mm on-site. It uses a G1/2 port.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X275-10
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X275-10 replacement — usually within 7-8 hours.