This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X250-40 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X250-40 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 SIJ80X250-40
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-40 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 SAIJ80X250-40, 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 → SAIJ80X250-40
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-40
The AirTAC SIJ80X250-40 is a discontinued double-acting single-rod ISO 15552 adjustable-stroke cylinder with a 250 mm nominal stroke and a G3/8 port. An external stop screw lets you trim the extend stroke by up to 40 mm on-site, yielding a usable 210-250 mm window. The stop sets the end position; it is not a load lock, and a plain cylinder drifts on air loss. This SKU lacks a magnet (-S), so it cannot take a magnetic switch. The direct drop-in replacement is the SAIJ80X250-40, retaining the exact bore, force, port, and mounting interface.
At 0.5 MPa this 80 mm bore delivers 2513 N push and 2268 N pull force, rising to 4523 N push at 0.9 MPa. The SAIJ upgrade utilizes an upgraded two Y-shaped one-way 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), equating to a 128 kg vertical lift with a 2:1 margin. The SAI family also adds SAIL and BSAI lock variants absent in the legacy SI line.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-40 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X250-40 |
| 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 SAIJ80X250-40 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 SAIJ80X250-40 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 SIJ80X250-40
| 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 SIJ80X250-40 Is Used
Variable Pitch Indexing
Allows on-site extend stroke tuning from 210 to 250 mm to alter part pitch without changing the cylinder.
Adjustable Transfer Stop
Sets a precise product halt position on a moving belt, trimmed by up to 40 mm for different carton lengths.
Dynamic Pusher Arm
Accommodates varying pallet depths by shortening the extend stroke on-site to avoid over-travel.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X250-40 with the SAIJ80X250-40
To replace the discontinued SIJ80X250-40, map directly to the SAIJ80X250-40 (insert A after S), keeping the 250 mm stroke, 40 mm adjust window, and G3/8 port. When sizing both ways, the neighboring 63 mm bore yields 2182 N push at 0.7 MPa, while the 100 mm bore yields 5497 N push at 0.7 MPa. Choose the 40 mm adjust window if your extend stroke needs on-site tuning between 210 and 250 mm. Mounting interfaces (FA, LB, TC) reuse standard ISO 15552 dimensions. Because this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; confirm if sensing is needed. For strokes >=300 mm, verify side-load guidance to prevent rod binding. The external stop screw sets end position but is not a lock; for held loads use an external rod lock or SAIL/BSAI variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X250-40
- ✓ 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 SIJ80X250-40 FAQ
Yes, the SIJ80X250-40 is discontinued. The exact drop-in replacement is the SAIJ80X250-40. It shares the identical ISO 15552 interface, 80 mm bore, 250 mm stroke, 40 mm adjust window, G3/8 port, and mounting, but adds an upgraded piston seal.
The 40 mm adjust window shortens the extend stroke on-site from 250 mm down to 210 mm. Force ratings are: push 2513 N and pull 2268 N at 0.5 MPa, push 3518 N at 0.7 MPa, push 4523 N at 0.9 MPa, and a max of 513 kgf at 1.0 MPa. The G3/8 port and 36 mm cushions govern flow.
Related AirTAC SAI Cylinders
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