This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X200-75, 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 SIJ50X200-75
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X200-75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 200mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ50X200-75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAIJ50X200-75
- 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 SIJ50X200-75
The AirTAC SIJ50X200-75 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. It uses an external stop screw to trim the extend stroke by up to 75 mm on-site, giving a usable 125-200 mm window from the 200 mm nominal maximum. The direct replacement is the SAIJ50X200-75, retaining the same interface, force, and mounting.
The SAIJ successor introduces an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. This stop screw sets the end position but is not a load lock; plain cylinders drift on air loss, so use an external rod lock or SAIL/BSAI variant for held loads. This non-magnetic SKU cannot take a switch.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X200-75 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X200-75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X200-75 |
| Bore size | Ø50 mm |
| Stroke | 200 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 SAIJ50X200-75 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 SAIJ50X200-75 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 SIJ50X200-75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×200 | 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 SIJ50X200-75 Is Used
Variable Depth Drilling
Adjusts the extend stroke on-site to set precise drilling depths for multiple material thicknesses without swapping cylinders.
Variable Length Diverter
Tunes the extend stop up to 75 mm to deflect differently sized packages on a conveyor line accurately.
Adjustable Forming Press
Trims the extend stroke to accommodate varying carton heights or forming dies in packaging machinery.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X200-75 with the SAIJ50X200-75
To replace the discontinued SIJ50X200-75, order the direct replacement SAIJ50X200-75, keeping the 200 mm nominal stroke and 75 mm adjust window. Choose the 75 mm adjust window when you need field tuning of the extend position from 125 to 200 mm. Mounting interfaces (Basic, FA, LB, TC) reuse existing ISO 15552 fixtures. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For strokes >=300 mm, verify side-load guidance to prevent rod binding. Remember the external stop sets position only; it is not a lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X200-75
- ✓ 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 SIJ50X200-75 FAQ
Yes, the SIJ50X200-75 is discontinued. The direct replacement is the SAIJ50X200-75, which shares the identical ISO 15552 interface, 50 mm bore, 200 mm stroke, 75 mm adjust window, G1/4 port, and mounting options.
The external stop screw allows trimming the extend stroke by up to 75 mm on-site, yielding a usable 125-200 mm window. The stop sets end position only; it is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X200-75
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X200-75 replacement — usually within 7-8 hours.