This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X40-20S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X40-20S in place of this model. 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-20S
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-20S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X40-20S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X40-20S
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-20S
The AirTAC SIJ80X40-20S is a discontinued double-acting single-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable 20-40 mm stroke out of the 40 mm nominal maximum. The 80 mm bore features a 25 mm rod, M20x1.5 thread, G3/8 port, and 36 mm adjustable cushions. Because this SIJ model is discontinued, the exact drop-in replacement is the SAIJ80X40-20S, retaining the same interface, force, and adjust window.
Force output matches the standard single-rod SAI: 2513 N push and 2268 N pull at 0.5 MPa, reaching 4523 N push at 0.9 MPa. The SAIJ upgrade incorporates an improved two-piece Y-shaped piston seal for lower start-up pressure and longer life. For sizing, a safe working load is roughly 1508 N (60% of the 0.5 MPa push), translating to a 128 kg vertical lift with a 2:1 margin. The stop screw sets the end position but is not a load lock; use SAIL or BSAI variants for held loads.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-20S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-20S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X40-20S |
| Bore size | Ø80 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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 SAIJ80X40-20S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAIJ80X40-20S produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-20S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-20S Is Used
Short-Stroke Clamping
Adjustable 20-40 mm extend allows precise clamping of varied part thicknesses without swapping cylinders.
Diverter Gate Positioning
Trim the extend stroke on-site to set the exact gate drop distance for different product sizes.
Product Pusher Alignment
Fine-tune the pusher end-position by up to 20 mm to accommodate carton width changes on the fly.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-20S with the SAIJ80X40-20S
To replace the discontinued SIJ80X40-20S, specify SAIJ80X40-20S for an exact drop-in match. If resizing, the neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore provides 3927 N. Choose the -20 mm adjust window when you need on-site extend tuning between 20 and 40 mm. Mounting interfaces (FA, LB, TC) reuse existing ISO 15552 fixtures. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors. For this 40 mm stroke, side-load concerns are minimal, but always guide the rod for rigid loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X40-20S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X40-20S FAQ
Yes, the SIJ80X40-20S is discontinued. The exact drop-in replacement is the SAIJ80X40-20S. It shares the same ISO 15552 interface, 80 mm bore, 40 mm stroke, 20 mm adjust window, G3/8 port, and mounting options, while adding an upgraded piston seal.
The 80 mm bore provides 2513 N push and 2268 N pull at 0.5 MPa, 3518 N at 0.7 MPa, and 4523 N at 0.9 MPa. The external stop screw window is 20 mm, allowing you to shorten the 40 mm nominal extend stroke down to 20 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X40-20S
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