This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ100X400-20, 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X400-20
The AirTAC SIJ100 Double Rod Adjustable Cylinder SIJ100X400-20 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 SAIJ100X400-20, 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 → SAIJ100X400-20
- 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X400-20
The AirTAC SIJ100X400-20 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 20 mm on-site, yielding a usable 380-400 mm stroke. The nominal 400 mm is the maximum. This 100 mm bore runs a G1/2 port, M20x1.5 rod thread, and 36 mm adjustable cushions.
The direct replacement is the SAIJ100X400-20, matching the ISO 15552 interface, force, and port. The SAIJ upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note: the stop screw sets end position only; it is not a load lock. Without live air, the piston drifts.
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-20 Technical Specifications
| Model | Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ100X400-20 |
| 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 SAIJ100X400-20 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 SAIJ100X400-20 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 SIJ100X400-20
| 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 SIJ100X400-20 Is Used
Press Fit Tuning
Needs field stroke tuning to dial in the exact 380-400 mm extend position for seating bearings without overstressing the fixture.
Divertor Adjustment
Allows on-site extend stroke trimming to fine-tune the pusher distance as product widths change on the line.
Pallet Stopper
Provides adjustable end-position stopping for varying pallet depths, using the external screw to set the precise 20 mm window.
Replacing the Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-20 with the SAIJ100X400-20
To replace the discontinued SIJ100X400-20, order the direct replacement SAIJ100X400-20. It preserves the 400 mm stroke, 20 mm adjust window, G1/2 port, and FA/LB/TC mountings. Choose the 20 mm adjust window when you need precise field tuning of the extend endpoint. Because this SKU lacks a -S magnet, it cannot accept a magnetic switch; confirm sensing needs. For the 400 mm stroke, use external guides to prevent rod bending and manage side loads. For load holding on air loss, use an external rod lock or the SAIL/BSAI variants, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ100X400-20
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X400-20 FAQ
Yes, the SIJ100X400-20 is discontinued. The direct replacement is the SAIJ100X400-20. It shares the identical ISO 15552 mounting interface, 400 mm stroke, 20 mm adjust window, G1/2 port, and force ratings. The SAIJ family also upgrades the piston seal to a two Y-shaped one-way element design for lower start-up pressure and longer life.
The external stop screw offers a 20 mm adjust window, shortening the extend stroke from the 400 mm maximum down to 380 mm. The stop sets end position only and is not a load lock; the piston drifts without live air.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ100X400-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ100X400-20 replacement — usually within 7-8 hours.