This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X175-40, 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 SIJ125X175-40
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X175-40 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 SAIJ125X175-40, 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 → SAIJ125X175-40
- 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 SIJ125X175-40
The AirTAC SIJ125X175-40 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 40 mm on-site, giving a usable 135-175 mm extend window from the 175 mm nominal maximum. The direct replacement is the SAIJ125X175-40, matching the interface, force, and mounting.
The SAIJ upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The stop screw sets end position only; it is not a load lock. This non-magnetic SKU cannot take a switch.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-40 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X175-40 |
| 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 SAIJ125X175-40 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 SAIJ125X175-40 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 SIJ125X175-40
| 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 SIJ125X175-40 Is Used
Press Fit Tuning
Allows operators to dial in the exact 135-175 mm extend position for inserting bearings without machining custom stop spacers.
Variable Length Diverter
Adjusts the extend stroke on-site to accommodate different package widths on a sorting line before final lockdown.
Adjustable Pallet Stop
Sets a precise mechanical end position for varying pallet depths, relying on the external stop screw to define the extend limit.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-40 with the SAIJ125X175-40
To replace the discontinued SIJ125X175-40, specify SAIJ125X175-40 for an direct match. Choose the 40 mm adjust window when you need on-site extend tuning between 135 and 175 mm. Mounting options include FA, LB, and TC. Because this SKU lacks the -S suffix, it cannot accept a magnetic switch; add -S for legacy CS1-B/DS1-B sensing. For strokes of 300 mm or longer, verify side-load limits. The stop screw sets end position but does not hold loads on air loss; use an external rod lock or SAIL/BSAI variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X175-40
- ✓ 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 SIJ125X175-40 FAQ
Yes, the SIJ125X175-40 is discontinued. The direct replacement is the SAIJ125X175-40, which shares the same ISO 15552 interface, 125 mm bore, 175 mm stroke, 40 mm adjust window, G1/2 port, and mounting options. The SAIJ also upgrades the piston seal to a two Y-shaped one-way element design.
The external stop screw provides a 40 mm adjust window, allowing you to trim the extend stroke from the 175 mm nominal maximum down to 135 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X175-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X175-40 replacement — usually within 7-8 hours.