This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X250-10S, 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 SIJ125X250-10S
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X250-10S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 250mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X250-10S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X250-10S
- 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 SIJ125X250-10S
The AirTAC SIJ125X250-10S 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 10 mm on-site, giving a usable 240-250 mm extend out of the 250 mm nominal maximum. The direct replacement is the SAIJ125X250-10S, matching the interface, force, and adjust window.
The SAIJ successor incorporates an upgraded piston seal with two Y-shaped one-way elements 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, BSAI, or an external rod lock. This unit includes a -S magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X250-10S Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X250-10S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X250-10S |
| Bore size | Ø125 mm |
| Stroke | 250 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 SAIJ125X250-10S 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 SAIJ125X250-10S 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 SIJ125X250-10S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 SIJ125X250-10S Is Used
Press Fit Tuning
Final insertion of bearings requires micro-adjustments to the extend position; the 10 mm stop window allows operators to dial in the exact 240-250 mm end point without changing the fixture.
Divertor Gate Adjustment
A sorting lane needs the actuator to push packages of varying widths; trimming the extend stroke by up to 10 mm on-site accommodates product changes quickly.
Pallet Stop Positioning
Setting the physical stop for incoming pallets demands precision; the external screw provides a hard end position that can be tweaked as pallet dimensions vary.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X250-10S with the SAIJ125X250-10S
To replace the discontinued SIJ125X250-10S, order the direct replacement SAIJ125X250-10S, keeping the same ISO 15552 mounting interface, G1/2 port, and 10 mm adjust window. Choose the 10 mm adjust window if you only need micro-trimming of the extend stroke. Mounting options include FA, LB, and TC. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches; the SAIJ replacement uses current AirTAC switches. For this 250 mm stroke, side-load is minimal, but for any stroke >=300 mm ensure guide alignment to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X250-10S
- ✓ 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 SIJ125X250-10S FAQ
Yes, the SIJ125X250-10S is discontinued. The direct replacement is the SAIJ125X250-10S. It shares the same ISO 15552 interface, 125 mm bore, 250 mm stroke, 10 mm adjust window, G1/2 port, and mounting options, but adds an upgraded piston seal.
The external stop screw window is 10 mm, allowing you to trim the extend stroke from 250 mm down to 240 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X250-10S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X250-10S replacement — usually within 7-8 hours.