This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ100X400-75, 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X400-75
The AirTAC SIJ100 Double Rod Adjustable Cylinder SIJ100X400-75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 400mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ100X400-75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ100X400-75
- 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X400-75
The AirTAC SIJ100X400-75 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder with a 400 mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 75 mm on-site, yielding a usable 325-400 mm window. It features a 25 mm rod, M20x1.5 thread, G1/2 port, and 36 mm adjustable cushions. This SKU lacks a magnet (-S), so it cannot accept a reed switch.
The direct replacement is the SAIJ100X400-75, preserving the ISO 15552 mounting interface, bore, force, and port. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note the stop screw sets end position only; it is not a load lock, so use an external rod lock for held loads.
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-75 Technical Specifications
| Model | Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ100X400-75 |
| Bore size | Ø100 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ100X400-75 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAIJ100X400-75 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X400-75 Is Used
Press Fit Tuning
Allows operators to dial in the exact 325-400 mm extend position for inserting 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 75 mm trim window.
Adjustable End Stop Pusher
Provides a field-tunable physical stop for positioning pallets, accommodating various pallet depths without changing cylinders.
Replacing the Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-75 with the SAIJ100X400-75
To replace the discontinued SIJ100X400-75, order the direct replacement SAIJ100X400-75, matching the 100 mm bore, 400 mm stroke, 75 mm adjust window, and G1/2 port. Select the 75 mm adjust window if your application requires field tuning the extend stroke between 325 and 400 mm; otherwise, a fixed SAI cylinder avoids the external stop complexity. Mounting hardware (FA, LB, TC) reuses the ISO 15552 interface. Because this SKU has no -S magnet, it cannot support sensing. For the 400 mm stroke, add external guides to prevent rod bending and manage side loads. Remember, the stop screw sets end position but does not hold the load on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ100X400-75
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-75 FAQ
Yes, the SIJ100X400-75 is discontinued. The direct replacement is the SAIJ100X400-75, which shares the same ISO 15552 interface, 100 mm bore, 400 mm stroke, 75 mm adjust window, and G1/2 port. The SAIJ family also features an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw offers a 75 mm adjust window, allowing the extend stroke to be shortened from the 400 mm maximum down to 325 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ100X400-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ100X400-75 replacement — usually within 7-8 hours.