This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X500-10, 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 SIJ125X500-10
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X500-10 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 500mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X500-10, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X500-10
- 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 SIJ125X500-10
The AirTAC SIJ125X500-10 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 490-500 mm stroke out of the 500 mm nominal maximum. The direct replacement is the SAIJ125X500-10, matching the interface, force, and mounting.
The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. The stop screw sets end position but is not a load lock; use SAIL or BSAI for held loads. This non-magnetic SKU cannot take a switch.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-10 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-10 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X500-10 |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAIJ125X500-10 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 SAIJ125X500-10 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 SIJ125X500-10
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SIJ125X500-10 Is Used
Press Fit Timing
Dialing in a 490-500 mm extend for seating bearings, where the 10 mm stop screw window absorbs mechanical stack-up without remachining hard stops.
Pallet Stop Adjustment
Fine-tuning a 125 mm bore actuator's end position to accommodate varying pallet lengths, using the external screw to set the exact 490-500 mm extend point.
Sealing Head Stroke Trim
Adjusting the extend stroke on-site for different carton heights, relying on the 10 mm trim window to set precise sealing pressure without reprogramming.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X500-10 with the SAIJ125X500-10
Replace the SIJ125X500-10 directly with the SAIJ125X500-10 (insert A after S). For force sizing, neighbouring bores yield 3927 N (100mm) and 10053 N (160mm) push at 0.5 MPa. The 10 mm adjust window is ideal for final mechanical timing without machining spacers. Mounting interfaces (Basic, FA, LB, TC) reuse existing ISO 15552 fixtures. As this non-magnetic SKU lacks a -S suffix, it cannot accept a sensor; add an external switch if needed. For the 500 mm stroke, support the rod against side-load bending and use external guides to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X500-10
- ✓ 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 SIJ125X500-10 FAQ
Yes, the SIJ125X500-10 is discontinued.
The external stop screw provides a 10 mm adjust window, shortening the extend stroke to 490 mm. The stop sets position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X500-10
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X500-10 replacement — usually within 7-8 hours.