This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X100-40S, with the same bore, stroke, output force, port and mounting, so it fits the same application. 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X100-40S
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X100-40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ50X100-40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ50X100-40S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-40S
The AirTAC SIJ50X100-40S is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 40 mm on-site, giving a usable 60-100 mm extension out of the 100 mm nominal maximum. The 50 mm bore features a G1/4 port, M16x1.5 rod thread, and 30 mm adjustable cushions. As the SIJ line is end-of-life, the direct replacement is the SAIJ50X100-40S, retaining the same ISO 15552 mounting interface, force, and adjust window.
The stop screw sets the end position but is not a load lock; use an external rod lock or SAIL/BSAI variant for held loads. The SAIJ replacement upgrades to a two Y-shaped one-way piston seal for lower start-up pressure and longer life. This -S model includes a piston magnet for legacy CS1-B/DS1-B switches.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-40S Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X100-40S |
| Bore size | Ø50 mm |
| Stroke | 100 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ50X100-40S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAIJ50X100-40S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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 SIJ50 Double Rod Adjustable Cylinder SIJ50X100-40S Is Used
Variable Stroke Clamping
Ideal for clamping stations where material thickness varies, letting operators trim the 100 mm extend stroke by up to 40 mm on-site without changing the cylinder.
Adjustable Transfer Stops
Used in conveyor diverters to set precise package stopping points on the fly, adjusting the end position mechanically via the external stop screw.
Tuning Packaging Pushers
Enables field stroke tuning for carton pushers that handle different box sizes, ensuring accurate positioning without re-mounting hardware.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-40S with the SAIJ50X100-40S
To replace the discontinued SIJ50X100-40S, use the direct replacement SAIJ50X100-40S, which matches the 50 mm bore, 100 mm nominal stroke, 40 mm adjust window, G1/4 port, and ISO 15552 mounting. Choose the 40 mm adjust window if you need on-site tuning of the extend stroke from 60 to 100 mm. Mounting options include FA, LB, and TC brackets. The -S suffix indicates a built-in magnet for switch sensing. For strokes of 300 mm or longer, verify side-load limits to prevent excessive guide wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X100-40S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-40S FAQ
Yes, the AirTAC SIJ50X100-40S is discontinued. The direct replacement is the SAIJ50X100-40S. It shares the same ISO 15552 interface, 50 mm bore, 100 mm nominal stroke, 40 mm adjust window, and G1/4 port, but features an upgraded two Y-shaped one-way piston seal for longer life.
The external stop screw allows you to shorten the extend stroke by up to 40 mm on-site, yielding a usable 60-100 mm stroke. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X100-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X100-40S replacement — usually within 7-8 hours.