This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X50-40S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X50-40S 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 SIJ80X50-40S
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X50-40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X50-40S
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-40S
The AirTAC SIJ80X50-40S is a discontinued double-acting, single-rod ISO 15552 adjustable-stroke cylinder with a 50 mm nominal stroke. An external stop screw allows you to trim the extend stroke by up to 40 mm on-site, yielding a usable 10-50 mm window. The exact drop-in replacement is the SAIJ80X50-40S, matching the G3/8 port, M20x1.5 rod thread, and 36 mm cushions. The stop screw sets the end position but is not a load lock.
At 0.5 MPa this 80 mm bore delivers 2513 N push and 2268 N pull force. A computed buyer insight: the safe working load is roughly 1508 N (60% of the 0.5 MPa push), allowing a 128 kg vertical lift with a 2:1 margin. Upgrading to SAIJ brings an upgraded two-piece Y-shaped piston seal for lower start-up pressure. Unlike adding an external stop to a fixed SAI, the SAIJ integrates this cleanly, and the SAI family adds lock variants (SAIL/BSAI) the SIJ lacked.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-40S Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X50-40S |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAIJ80X50-40S 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 SAIJ80X50-40S 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 SIJ80X50-40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SIJ80X50-40S Is Used
Multi-Position Clamping
Provides field-tunable clamping depth on machined parts, allowing operators to dial in the exact 10-50 mm extend position without swapping cylinders.
Variable Length Diverter
Adjusts the stroke of a conveyor routing gate on-site to accommodate different package sizes, using the stop screw to set the precise divert endpoint.
Tiered Pallet Stops
Sets variable stop heights for pallets of differing heights, trimming the extend stroke by up to 40 mm to avoid overtravel damage.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X50-40S with the SAIJ80X50-40S
To replace the discontinued SIJ80X50-40S, order the drop-in SAIJ80X50-40S, reusing your existing ISO 15552 FA, LB, or TC mounts. If sizing both ways, the neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N. This 80 mm bore provides 2513 N push at 0.5 MPa and 3518 N at 0.7 MPa. Choose the 40 mm adjust window when you need on-site extend trimming between 10 and 50 mm. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. For strokes >=300 mm, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X50-40S
- ✓ 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 SIJ80X50-40S FAQ
Yes, the SIJ80X50-40S is discontinued. The exact drop-in replacement is the SAIJ80X50-40S. It shares the same ISO 15552 interface, 80 mm bore, 50 mm stroke, 40 mm adjust window, G3/8 port, and mounting options, but 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, and 4523 N push at 0.9 MPa. The theoretical max is 513 kgf at 1.0 MPa. The external stop screw provides a 40 mm adjust window, allowing the 50 mm extend stroke to be shortened to a minimum of 10 mm on-site.
Related AirTAC SAI Cylinders
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