This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X100-50, 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 SIJ125X100-50
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X100-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 100mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X100-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X100-50
- 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 SIJ125X100-50
The AirTAC SIJ125X100-50 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 50 mm on-site, yielding a usable 50-100 mm stroke from the 100 mm nominal maximum. It features a 32 mm rod, M27x2 thread, G1/2 port, and 40 mm adjustable cushions. The direct replacement is the SAIJ125X100-50, matching the interface, force, and adjust window.
The SAIJ upgrade introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The stop screw sets end position but is not a load lock; use SAIL or BSAI variants for held loads. This non-magnet SKU cannot take a switch.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-50 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X100-50 |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125X100-50 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 SAIJ125X100-50 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 SIJ125X100-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SIJ125X100-50 Is Used
Press Fit Calibration
Fine-tune the 50-100 mm extend stroke on-site during press assembly to accommodate material thickness variances without re-engineering the fixture.
Variable Length Diverter
Adjust the stop screw to alter the extend position on a sorting line, accommodating different package sizes on the fly.
Pallet Positioning Stop
Set precise end positions for pallets of varying heights, using the external stop to trim the stroke exactly where the load must halt.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-50 with the SAIJ125X100-50
To replace the discontinued SIJ125X100-50, order the direct replacement SAIJ125X100-50, reusing your existing ISO 15552 FA, LB, or TC mounting hardware. The 50 mm adjust window is ideal if your end position needs field tuning between 50 and 100 mm; for fixed 100 mm strokes, a standard SAI cylinder suffices. Because this SKU lacks a -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For stroke lengths at or above 300 mm, verify side-load guide tolerance to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X100-50
- ✓ 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 SIJ125X100-50 FAQ
Yes, the SIJ125X100-50 is discontinued. The direct replacement is the SAIJ125X100-50, offering the same ISO 15552 interface, 125 mm bore, 100 mm stroke, 50 mm adjust window, G1/2 port, and mounting compatibility.
The external stop screw provides a 50 mm adjust window, shortening the extend stroke from the 100 mm maximum down to 50 mm. Note that the stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X100-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X100-50 replacement — usually within 7-8 hours.