This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ100X40-20S, 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 SIJ100X40-20S
The AirTAC SIJ100 Double Rod Adjustable Cylinder SIJ100X40-20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 40mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ100X40-20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ100X40-20S
- 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 SIJ100X40-20S
The AirTAC SIJ100X40-20S 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 20mm on-site, giving a usable 20-40mm extend window from the 40mm nominal maximum. The stop sets the end position but is not a load lock.
The direct replacement is the SAIJ100X40-20S, retaining the same interface, force, and porting. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note that plain cylinders drift on air loss; use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X40-20S Technical Specifications
| Model | Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X40-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ100X40-20S |
| Bore size | Ø100 mm |
| Stroke | 40 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 SAIJ100X40-20S 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 SAIJ100X40-20S 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 SIJ100X40-20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×40 | 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 SIJ100X40-20S Is Used
Press Fit Tuning
Dial in exact 20-40mm insertion depths for bearing or bushing press fits, allowing on-site stroke adjustment without swapping cylinders.
Diverter Gate Positioning
Fine-tune the extend stop to set diverter flap angles precisely on packaging lines, adapting to varying carton widths on the fly.
Clamp Force Calibration
Adjust the extend stroke to regulate clamping reach on machining fixtures, ensuring parts seat correctly before the tool cycle begins.
Replacing the Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X40-20S with the SAIJ100X40-20S
To replace the discontinued SIJ100X40-20S, order the direct replacement SAIJ100X40-20S, reusing your existing FA, LB, or TC ISO 15552 mounts. The 20mm adjust window is ideal for precise end-position tuning without machining. This -S model includes a piston magnet for legacy CS1-B/DS1-B switches (the SAIJ uses current switches). For strokes >=300mm, verify side-load guide tolerance. Remember, the stop screw sets position and does not lock; for load holding on air loss, specify a SAIL/BSAI lock variant or external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ100X40-20S
- ✓ 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 SIJ100X40-20S FAQ
Yes, the SIJ100X40-20S is discontinued. The direct replacement is the SAIJ100X40-20S. It shares the same ISO 15552 mounting interface, 100mm bore, 40mm nominal stroke, 20mm adjust window, and G1/2 port. The SAIJ features an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw provides a 20mm adjustment window, shortening the 40mm nominal extend stroke down to 20mm. It operates at 30-800 mm/s with a G1/2 port.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ100X40-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ100X40-20S replacement — usually within 7-8 hours.