This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X100-40, 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 SIJ125X100-40
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X100-40 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 SAIJ125X100-40, 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 → SAIJ125X100-40
- 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 SIJ125X100-40
The AirTAC SIJ125X100-40 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. Its external stop screw lets you trim the extend stroke by up to 40mm on-site, giving a usable 60-100mm extension out of the 100mm nominal maximum. The direct replacement is the SAIJ125X100-40, matching the interface, force, and mounting.
Because this SKU lacks a -S magnet, it cannot accept a magnetic switch for position sensing. The SAIJ upgrade introduces an improved two-piece Y-shaped piston seal for lower start-up pressure and longer life, while retaining the ISO 15552 mounting dimensions so your existing FA, LB, or TC brackets reuse perfectly. Remember the stop screw sets the end position but is not a load lock; use an external rod lock or the SAIL/BSAI variants for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-40 Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X100-40 |
| 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 SAIJ125X100-40 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 SAIJ125X100-40 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 SIJ125X100-40
| 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 SIJ125X100-40 Is Used
Press Fit Tuning
Allows operators to dial in the exact 60-100mm extend position for pressing bearings without machining custom spacers.
Variable Length Diverter
Adjusts the extend stop on-site to deflect different package sizes on a sorting line within the 40mm trim window.
Adjustable End Stop
Sets a precise physical end position for palletizing tasks where the nominal 100mm stroke must be shortened for specific tooling.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-40 with the SAIJ125X100-40
To replace the discontinued SIJ125X100-40, order the SAIJ125X100-40 direct directly. Choose the 40mm adjust window when you need on-site extend tuning between 60 and 100mm. Mounting options include Basic, FA, LB, and TC. Since this SKU has no -S magnet, it cannot support sensing; add external sensors if needed. For strokes at or above 300mm, carefully manage side loads to prevent guide wear. Note the 30-500mm/s speed range for this bore.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X100-40
- ✓ 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 SIJ125X100-40 FAQ
Yes, the SIJ125X100-40 is discontinued. The direct replacement is the SAIJ125X100-40. It shares the identical ISO 15552 interface, 125mm bore, 100mm nominal stroke, 40mm adjust window, G1/2 port, and mounting options, but adds an upgraded piston seal.
The external stop screw provides a 40mm adjustment window, allowing you to shorten the 100mm nominal extend stroke down to 60mm on-site. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X100-40
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X100-40 replacement — usually within 7-8 hours.