This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X70-20 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X70-20 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 SIJ80X70-20
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X70-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X70-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X70-20
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X70-20
The AirTAC SIJ80X70-20 is a discontinued double-acting single-rod ISO 15552 adjustable-stroke cylinder with an 80 mm bore. An external stop screw lets you trim the extend stroke by up to 20 mm on-site, giving a usable forward travel of 50-70 mm. The nominal 70 mm stroke is the maximum. This bore delivers 2513 N push and 2268 N pull at 0.5 MPa via its G3/8 port. Because SIJ is end-of-life, the exact drop-in replacement is the SAIJ80X70-20, matching the interface, force, and adjust window.
The SAIJ successor upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. For sizing, the safe working load is roughly 1508 N (60% of the 0.5 MPa push), equating 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 an external rod lock or the SAIL/BSAI variants for held loads. This non-magnetic SKU cannot take a switch.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X70-20 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X70-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X70-20 |
| Bore size | Ø80 mm |
| Stroke | 70 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 SAIJ80X70-20 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 SAIJ80X70-20 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 SIJ80X70-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SIJ80X70-20 Is Used
Diverter Gate Positioning
Trimming the 70 mm extend stroke by up to 20 mm on-site lets operators fine-tune a diverter flap's exact resting angle without machining spacers.
Variable Stroke Sealing Press
A 50-70 mm forward travel window accommodates cartons of slightly different heights, applying the 2513 N push force accurately to the seal line.
Adjustable Product Stop
An external stop screw allows quick changes to the protrusion distance on a conveyor lane, adapting the 80 mm bore cylinder to new package sizes.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X70-20 with the SAIJ80X70-20
To replace the discontinued SIJ80X70-20, order the drop-in SAIJ80X70-20, reusing your existing FA, LB, or TC ISO 15552 mounts. To size both ways: the 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N. The 20 mm adjust window is ideal if your final end position needs on-site tuning between 50 and 70 mm. This SKU lacks the -S magnet and cannot accept a sensor; if you need position detection, select a magnet-equipped model. For this 70 mm stroke, side-load is minimal, but note that for any stroke >=300 mm you should guide the rod to prevent binding. Remember the stop screw only sets position and does not hold the load on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X70-20
- ✓ 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 SIJ80X70-20 FAQ
Yes, the SIJ80X70-20 is discontinued. The exact drop-in replacement is the SAIJ80X70-20, which shares the same ISO 15552 interface, 80 mm bore, 70 mm stroke, 20 mm adjust window, G3/8 port, and mounting options. The SAIJ family also features an upgraded piston seal.
The 80 mm bore provides 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa. The external stop screw provides a 20 mm adjust window, allowing you to shorten the 70 mm nominal extend stroke down to 50 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ80X70-20
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