This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X250-20 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X250-20 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 SIJ80X250-20
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X250-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X250-20
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-20
The AirTAC SIJ80X250-20 is a double-acting single-rod ISO 15552 adjustable-stroke cylinder, now discontinued and replaced by the SAIJ80X250-20. It features an 80mm bore, 250mm nominal stroke, and an external stop screw that lets you trim the extend stroke by up to 20mm on-site (usable extend 230-250mm). The stop sets the end position but is not a load lock. Thrust is 2513N push and 2268N pull at 0.5MPa, with a G3/8 port.
The SAIJ drop-in keeps the ISO 15552 mounting interface and adds an upgraded two Y-shaped one-way piston seal for low start-up pressure. Computed buyer insight: safe working load is ~1508N (60% of push@0.5MPa), yielding a ~128kg vertical lift with a 2:1 margin. This SKU lacks a magnet (-S) so it cannot take a switch. For held loads use an external rod lock, as air cushions only decelerate.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-20 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X250-20 |
| Bore size | Ø80 mm |
| Stroke | 250 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 SAIJ80X250-20 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 SAIJ80X250-20 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 SIJ80X250-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SIJ80X250-20 Is Used
Press Fit Tuning
Dialing in a 230-250mm extend for light-duty press fits where a 20mm external stop screw window allows exact end-position trimming without re-engineering the fixture.
Transfer Diverter
Adjusting a diverter arm stroke on-site by up to 20mm to accommodate product size changes on a packaging line, using the 2513N push force at 0.5MPa.
End-Stop Positioning
Setting a precise physical end-stop for a pallet lifting mechanism, where the 80mm bore provides a safe working load of ~1508N and the stop screw fine-tunes the extend.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-20 with the SAIJ80X250-20
To replace the discontinued SIJ80X250-20, order the drop-in SAIJ80X250-20, reusing your existing FA, LB, or TC mounts. The 20mm adjust window is ideal if you need final extend position tuning between 230-250mm. If sizing both ways, the neighbouring 63mm bore yields 1559N push@0.5MPa, while the 100mm bore yields 3927N. Note: because this SKU has no -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For strokes >=300mm, verify side-load guidance to prevent rod binding. The stop screw sets end position only; it is not a lock, so for load-holding without live air, specify an external rod lock or a SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X250-20
- ✓ 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 SIJ80X250-20 FAQ
Yes, the SIJ80X250-20 is discontinued. The exact drop-in replacement is the SAIJ80X250-20, which shares the same ISO 15552 interface, 80mm bore, 250mm stroke, 20mm adjust window, G3/8 port, and mounting options. The SAIJ family also features an upgraded piston seal.
The 80mm bore provides 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, and 4523N at 0.9MPa (max 513 kgf at 1.0MPa). The external stop screw provides a 20mm adjust window, allowing the extend stroke to be shortened from 250mm down to 230mm. The G3/8 port and 36mm cushions are standard.
Related AirTAC SAI Cylinders
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