This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ200X120-50S, 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 SIJ200 Double Rod Adjustable Cylinder SIJ200X120-50S
The AirTAC SIJ200 Double Rod Adjustable Cylinder SIJ200X120-50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 120mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ200X120-50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke120 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAIJ200X120-50S
- 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 SIJ200 Double Rod Adjustable Cylinder SIJ200X120-50S
The AirTAC SIJ200X120-50S 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 50 mm on-site, giving a usable 70-120 mm stroke from the 120 mm nominal maximum. The direct replacement is the SAIJ200X120-50S, retaining the same interface, force, and adjust window.
The SAIJ upgrade introduces an improved two-piece Y-shaped piston seal for lower start-up pressure and longer life. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. Remember the stop screw sets end position only; it is not a load lock, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac SIJ200 Double Rod Adjustable Cylinder SIJ200X120-50S Technical Specifications
| Model | Airtac SIJ200 Double Rod Adjustable Cylinder SIJ200X120-50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ200X120-50S |
| Bore size | Ø200 mm |
| Stroke | 120 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ200X120-50S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
The SAIJ200X120-50S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ200 Double Rod Adjustable Cylinder SIJ200X120-50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×120 | 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 SIJ200 Double Rod Adjustable Cylinder SIJ200X120-50S Is Used
Variable Height Spotting
Allows operators to trim the extend stroke from 120 mm down to 70 mm to accommodate varying workpiece heights, setting a precise physical stop position for each run.
Pallet Positioning Stops
Handles large 200 mm bore loads with a 50 mm adjustable cushion, decelerating heavy pallets reliably while the external screw sets the final resting position.
Replacing the Airtac SIJ200 Double Rod Adjustable Cylinder SIJ200X120-50S with the SAIJ200X120-50S
To replace the discontinued SIJ200X120-50S, order the exact direct replacement SAIJ200X120-50S, which preserves the 200 mm bore, 120 mm stroke, 50 mm adjust window, G3/4 port, and ISO 15552 mounting dimensions. Select the 50 mm adjust window if your application requires trimming the extend stroke down to a 70 mm minimum on-site. Mounting options include Basic, FA, LB, and TC brackets. The -S suffix ensures a piston magnet for legacy CS1-B/DS1-B switches (current AirTAC switches are used on the SAIJ). For strokes of 300 mm or longer, verify side-load limits to prevent guide wear. Speed ranges from 30-500 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ200X120-50S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ200 Double Rod Adjustable Cylinder SIJ200X120-50S FAQ
Yes, the SIJ200X120-50S is discontinued. The direct replacement is the SAIJ200X120-50S. It maintains the same ISO 15552 interface, 200 mm bore, 120 mm stroke, 50 mm adjust window, G3/4 port, and mounting options, while upgrading the piston seal to a two-piece Y-shaped element for longer life.
The external stop screw provides a 50 mm adjust window, allowing you to shorten the extend stroke from the 120 mm nominal maximum down to 70 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ200X120-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ200X120-50S replacement — usually within 7-8 hours.