This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X175-40S, 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 SIJ125X175-40S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X175-40S 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 SAIJ125X175-40S, 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 → SAIJ125X175-40S
- 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 SIJ125X175-40S
The AirTAC SIJ125X175-40S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. Its external stop screw lets you trim the extend stroke by up to 40 mm on-site, giving a usable 135-175 mm window from the 175 mm nominal maximum.
The direct replacement is the SAIJ125X175-40S, matching the ISO 15552 mounting interface, bore, and force. The SAIJ family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note the stop screw sets end position only; it is not a load lock.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-40S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X175-40S |
| 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 SAIJ125X175-40S 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 SAIJ125X175-40S 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 SIJ125X175-40S
| 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 SIJ125X175-40S Is Used
Press Fit Tuning
Allows operators to dial in the exact 135-175 mm extend position on-site for inserting bearings without changing the entire cylinder setup.
Variable Carton Flap Folding
Accommodates different box heights by trimming the extend stroke up to 40 mm, ensuring precise flap contact during the packaging sequence.
Adjustable Pallet Stopper
Provides a field-adjustable end stop for conveyor lines handling mixed pallet depths, setting the exact 135-175 mm stopping distance.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X175-40S with the SAIJ125X175-40S
To replace the discontinued SIJ125X175-40S, order the direct replacement SAIJ125X175-40S, which retains the exact G1/2 port, M27x2 rod thread, 40 mm cushion, and FA/LB/TC mountings. Choose the 40 mm adjust window if your extend stroke needs on-site tuning between 135 and 175 mm. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches. For strokes at or above 300 mm, verify your side-load limits to prevent guide failure. Remember that a plain cylinder does not hold loads on air loss; use an external rod lock or the SAIL/BSAI variants for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X175-40S
- ✓ 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 SIJ125X175-40S FAQ
Yes, the SIJ125X175-40S is discontinued. The direct replacement is the SAIJ125X175-40S. It shares the identical ISO 15552 interface, 125 mm bore, 175 mm stroke, 40 mm adjust window, G1/2 port, and mounting options, but features an upgraded two Y-shaped one-way piston seal for longer life.
This double-acting double-rod cylinder has a 40 mm adjust window (usable extend stroke 135-175 mm). The external stop screw sets the end position but is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X175-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X175-40S replacement — usually within 7-8 hours.