This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X100-20, 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 SIJ125X100-20
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20 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 SAIJ125X100-20, 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 → SAIJ125X100-20
- 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 SIJ125X100-20
The AirTAC SIJ125X100-20 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 20mm on-site, giving a usable extend range of 80-100mm from the 100mm nominal maximum. The direct replacement is the SAIJ125X100-20, matching the interface, force, and mounting.
The SAIJ upgrade features 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; for held loads use an external rod lock or SAIL/BSAI variant. This SKU lacks a magnet and cannot take a switch.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X100-20 |
| 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 SAIJ125X100-20 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 SAIJ125X100-20 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 SIJ125X100-20
| 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 SIJ125X100-20 Is Used
Press Fit Tuning
Field-trim the 20mm extend window to dial in precise bearing seating without machining custom spacers.
Divert Stop Adjustment
Fine-tune the actuator end position on-site to accommodate varying package sizes on a sorting line.
Pallet Positioning
Adjust the extend stop to set exact pallet push-off distances at different packaging stations.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20 with the SAIJ125X100-20
To replace the discontinued SIJ125X100-20, order the direct replacement SAIJ125X100-20. Choose the 20mm adjust window when you need on-site extend tuning between 80 and 100mm. Mounting interfaces include FA, LB, and TC. Because this SKU has no -S magnet, it cannot accept a sensor; add -S for legacy CS1-B/DS1-B switch accuracy. For strokes over 300mm, verify side-load limits.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X100-20
- ✓ 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 SIJ125X100-20 FAQ
Yes, the SIJ125X100-20 is discontinued. The direct replacement is the SAIJ125X100-20, sharing the same ISO 15552 interface, 125mm bore, 100mm stroke, 20mm adjust window, G1/2 port, and mounting.
The external stop screw window is 20mm, allowing you to trim the extend stroke from 100mm down to 80mm on-site.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X100-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X100-20 replacement — usually within 7-8 hours.