This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X100-75, 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 SIJ125X100-75
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75 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 SAIJ125X100-75, 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 → SAIJ125X100-75
- 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 SIJ125X100-75
The AirTAC SIJ125X100-75 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. It features a 125 mm bore, a 100 mm maximum extend stroke, and an external stop screw allowing you to trim the extend stroke by up to 75 mm on-site (yielding a 25-100 mm usable window). The G1/2 port and M27x2 rod thread match the standard interface.
As SIJ is discontinued, the direct replacement is the SAIJ125X100-75, preserving the bore, stroke, force, and mounting. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note: this SKU lacks a -S magnet and cannot accept a sensor.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X100-75 |
| 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 SAIJ125X100-75 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 SAIJ125X100-75 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 SIJ125X100-75
| 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 SIJ125X100-75 Is Used
Press Fit Tuning
Allows operators to dial in the exact extend contact point on-site for pressing bearings without machining hard stops.
Variable Carton Flaps
Accommodates changing package heights by trimming the extend stroke dynamically on the packaging line.
Adjustable Ejector
Sets the precise ejection distance for parts of varying widths exiting a machining center.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-75 with the SAIJ125X100-75
To replace the discontinued SIJ125X100-75, order the direct replacement SAIJ125X100-75; it reuses the exact ISO 15552 mounting interface (Basic, FA, LB, TC) without bracket changes. Choose the 75 mm adjust window when you need on-site end-position flexibility from 25 to 100 mm. Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For strokes at or above 300 mm, verify side-load limits to prevent guide bushing wear. The external stop sets end position but is not a load lock; for held loads use an external rod lock or the SAIL/BSAI variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X100-75
- ✓ 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 SIJ125X100-75 FAQ
Yes, the SIJ125X100-75 is discontinued. The direct replacement is the SAIJ125X100-75, which shares the identical ISO 15552 interface, 125 mm bore, 100 mm stroke, 75 mm adjust window, and G1/2 port. The SAIJ family also adds an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw provides a 75 mm adjust window, shortening the 100 mm nominal extend stroke down to 25 mm. The stop sets end position only; it is not a load lock, and a plain cylinder drifts on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X100-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X100-75 replacement — usually within 7-8 hours.