This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X175-30, 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 SIJ125X175-30
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X175-30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 175mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X175-30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X175-30
- 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 SIJ125X175-30
The AirTAC SIJ125X175-30 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 125 mm bore and 175 mm maximum stroke. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, giving a usable extend range of 145-175 mm. The direct replacement is the SAIJ125X175-30, retaining the same interface, force, and adjust window.
The SAIJ successor incorporates an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note this SKU lacks a magnet (-S) so it cannot accept a sensor. The stop screw sets end position but is not a load lock; for held loads use SAIL or BSAI variants.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-30 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X175-30 |
| Bore size | Ø125 mm |
| Stroke | 175 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 SAIJ125X175-30 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 SAIJ125X175-30 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 SIJ125X175-30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 SIJ125X175-30 Is Used
Press Fit Tuning
Allows operators to dial in the exact 145-175 mm extend position on-site for pressing bearings without machining custom spacers.
Variable Length Diverter
Adjusts the extend stop to deflect varying package sizes on a sorting line, fine-tuning the 30 mm window as product formats change.
Adjustable End Stop
Sets a precise physical end position for pallet positioning fixtures, trimming the stroke locally to match different pallet heights.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-30 with the SAIJ125X175-30
To replace the discontinued SIJ125X175-30, order the direct replacement SAIJ125X175-30, keeping the 30 mm adjust window for a 145-175 mm extend range. Mounting interfaces (Basic, FA, LB, TC) reuse directly. Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For strokes at or above 300 mm, verify side-load limits to prevent guide failure.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X175-30
- ✓ 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 SIJ125X175-30 FAQ
Yes, the SIJ125X175-30 is discontinued. The direct replacement is the SAIJ125X175-30, which shares the same ISO 15552 interface, 125 mm bore, 175 mm stroke, 30 mm adjust window, G1/2 port, and mounting options.
The external stop screw provides a 30 mm adjust window, allowing you to shorten the extend stroke from the 175 mm maximum down to 145 mm.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X175-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X175-30 replacement — usually within 7-8 hours.