This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X125-30S, 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 SIJ125X125-30S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X125-30S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 125mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X125-30S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X125-30S
- 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 SIJ125X125-30S
The AirTAC SIJ125X125-30S is a double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 30 mm on-site, giving a usable stroke range of 95-125 mm. This SIJ model is discontinued; the direct replacement is the SAIJ125X125-30S, sharing the same interface, force, and adjust window.
The SAIJ upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. The stop screw sets the end position but is not a load lock; for held loads use SAIL or BSAI. The -S suffix means a piston magnet is present for legacy CS1-B/DS1-B switches.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-30S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-30S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X125-30S |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAIJ125X125-30S 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 SAIJ125X125-30S 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 SIJ125X125-30S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SIJ125X125-30S Is Used
Press Fit Tuning
Allows operators to fine-tune the extend stroke on-site for pressing bearings, accommodating material thickness variations without swapping cylinders.
Variable Carton Flaps
Provides adjustable end positions for flap folding mechanisms, ensuring precise contact across different carton depths.
Adjustable Diverter Stops
Sets exact product halt points on a conveyor line, enabling rapid changeovers for varying package lengths.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X125-30S with the SAIJ125X125-30S
To replace the discontinued SIJ125X125-30S, order the direct replacement SAIJ125X125-30S, which preserves the 125 mm bore, 30 mm adjust window, G1/2 port, and ISO 15552 mounting dimensions. Choose the 30 mm adjust window if your extend stroke needs field tuning between 95 and 125 mm. Mounting attachments include FA, LB, and TC styles. The -S suffix ensures a piston magnet is fitted for switch sensing. For strokes of 300 mm or longer, carefully manage side loads to prevent rod binding and premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X125-30S
- ✓ 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 SIJ125X125-30S FAQ
Yes, the SIJ125X125-30S is discontinued. The direct replacement is the SAIJ125X125-30S, which matches the ISO 15552 interface, 125 mm bore, 125 mm stroke, 30 mm adjust window, G1/2 port, and mounting hardware.
The external stop screw window is 30 mm, allowing the extend stroke to be shortened from 125 mm down to 95 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X125-30S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X125-30S replacement — usually within 7-8 hours.