This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X400-20 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X400-20 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 SIJ80X400-20
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X400-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X400-20
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-20
The AirTAC SIJ80X400-20 is a discontinued double-acting single-rod ISO 15552 adjustable-stroke cylinder with a 400 mm nominal stroke and a G3/8 port. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable extend range of 380-400 mm. The stop sets the end position; it is not a load lock, and a plain cylinder drifts on air loss. The exact drop-in replacement is the SAIJ80X400-20, matching the bore, force, adjust window, and mounting.
Bore 80 mm delivers 2513 N push and 2268 N pull at 0.5 MPa, reaching 4523 N at 0.9 MPa (513 kgf max). Computed buyer insight: safe working load is ~1508 N (60% of the 0.5 MPa push), allowing a ~128 kg vertical lift with a 2:1 margin. The SAIJ upgrade uses an upgraded two Y-shaped one-way piston seal for low start-up pressure, and the SAI family adds SAIL and BSAI lock variants. This non-S SKU lacks a magnet and cannot take a switch.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-20 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X400-20 |
| Bore size | Ø80 mm |
| Stroke | 400 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 SAIJ80X400-20 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 SAIJ80X400-20 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 SIJ80X400-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | 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 SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-20 Is Used
Variable Pitch Indexing
Needs field stroke tuning to alter the extend position by up to 20 mm for a 400 mm cycle without swapping the cylinder.
Product Divert Setup
Requires adjusting the extend end-point on-site to handle different package sizes on a 80 mm bore transfer line.
Stacking Height Calibration
Demands a 380-400 mm extend trim window to fine-tune stopper placement for varying pallet stack heights.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-20 with the SAIJ80X400-20
Replace the discontinued SIJ80X400-20 directly with the SAIJ80X400-20 (same ISO 15552 interface, 20 mm adjust window, G3/8 port, and 36 mm cushions). To size both ways: the neighboring 63 mm bore gives 2182 N push at 0.7 MPa, while the 100 mm bore gives 5497 N push at 0.7 MPa. Choose the 20 mm adjust window if you need 380-400 mm extend tuning. Mounting options include FA, LB, and TC. Because this is a non-S model, it cannot accept a magnetic switch. For the 400 mm stroke, use external guides to prevent rod bending and manage side loads. The stop screw is not a lock; for held loads use an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X400-20
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X400-20 FAQ
Yes, the SIJ80X400-20 is discontinued. The exact drop-in replacement is the SAIJ80X400-20, sharing the same ISO 15552 interface, 400 mm stroke, 20 mm adjust window, G3/8 port, and mounting.
The 80 mm bore provides 2513 N push / 2268 N pull @0.5 MPa, 3518 N @0.7 MPa, and 4523 N @0.9 MPa (513 kgf max). The external stop screw window is 20 mm, allowing a usable extend stroke of 380-400 mm. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X400-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ80X400-20 replacement — usually within 7-8 hours.