This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X100-75, 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 SIJ50X100-75
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X100-75 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 SAIJ50X100-75, 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 → SAIJ50X100-75
- 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 SIJ50X100-75
The AirTAC SIJ50X100-75 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 75 mm on-site, yielding a usable 25-100 mm stroke from the 100 mm nominal maximum.
As this SIJ model is end-of-life, the direct replacement is the SAIJ50X100-75, retaining the same interface, force, and adjustability. The SAIJ upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note: this non-magnetic SKU cannot accept a sensor switch, and the stop screw sets end position but is not a load lock.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-75 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X100-75 |
| 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 SAIJ50X100-75 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 SAIJ50X100-75 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 SIJ50X100-75
| 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 SIJ50X100-75 Is Used
Variable Depth Drilling
Allows operators to tune the extend stroke on-site to match different material thicknesses, preventing over-travel without re-mounting the actuator.
Adjustable Pusher Stroke
Accommodates changing package sizes on a line by trimming the extend stroke by up to 75 mm, ensuring precise placement without physical stops.
Variable Height Diverter
Provides field-adjustable extension to route items of varying dimensions into different lanes, offering flexibility for mixed-product handling.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-75 with the SAIJ50X100-75
To replace the discontinued SIJ50X100-75, order the direct replacement SAIJ50X100-75, which preserves the 75 mm adjust window, G1/4 port, and FA/LB/TC mounting interfaces. Choose the 75 mm adjust window when you need to trim the extend stroke on-site from 100 mm down to 25 mm. Because this SKU lacks the -S suffix, it cannot support a magnetic switch; for sensing, select an SAIJ-S model. For stroke lengths of 300 mm or greater, verify side-load limits to prevent rod distortion. Remember that the external stop sets end position but does not lock the load; for held loads, use an external rod lock or the SAIL/BSAI variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X100-75
- ✓ 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 SIJ50X100-75 FAQ
Yes, the SIJ50X100-75 is discontinued. The direct replacement is the SAIJ50X100-75, which shares the same ISO 15552 interface, 50 mm bore, 100 mm nominal stroke, 75 mm adjust window, and G1/4 port.
The external stop screw allows you to trim the extend stroke by up to 75 mm on-site, giving a usable 25-100 mm stroke. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X100-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X100-75 replacement — usually within 7-8 hours.