This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ50X100-20, 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 SIJ50X100-20
The AirTAC SIJ50 Double Rod Adjustable Cylinder SIJ50X100-20 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 SAIJ50X100-20, 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 → SAIJ50X100-20
- 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 SIJ50X100-20
The AirTAC SIJ50X100-20 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 20mm on-site, giving a usable 80-100mm range from the 100mm nominal maximum. The direct replacement is the SAIJ50X100-20, matching the G1/4 port, M16x1.5 rod thread, and 30mm adjustable cushions.
The SAIJ upgrade utilizes a two Y-shaped one-way piston seal for low start-up pressure. This non-magnet SKU cannot take a switch; the stop sets end position but is not a load lock, so use SAIL or an external rod lock for held loads.
Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-20 Technical Specifications
| Model | Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ50X100-20 |
| 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 SAIJ50X100-20 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 SAIJ50X100-20 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 SIJ50X100-20
| 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 SIJ50X100-20 Is Used
Press Fit Tuning
Dial in the exact 80-100mm extend position for inserting bearings without machining hard stops.
Transfer Diverter
Adjust the extend endpoint on-site to route varying box sizes onto different conveyor lanes.
Carton Sealing
Trim the 20mm window to lower the sealing head precisely for uneven package heights.
Replacing the Airtac SIJ50 Double Rod Adjustable Cylinder SIJ50X100-20 with the SAIJ50X100-20
To replace the discontinued SIJ50X100-20, specify SAIJ50X100-20 for an exact ISO 15552 direct. Size both ways using 0.5MPa push force: the 40mm bore gives 628N, while the 63mm bore yields 1559N. The 20mm adjust window is ideal for precise end-position tuning without machining. Mounting interfaces (FA, LB, TC) reuse existing ISO 15552 holes. Because this SKU lacks the -S magnet, it cannot accept legacy CS1-B/DS1-B sensors. For strokes >=300mm, verify side-load guide tolerance. Remember the stop screw is not a lock; drifting occurs on air loss.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ50X100-20
- ✓ 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 SIJ50X100-20 FAQ
Yes, the SIJ50X100-20 is discontinued. The direct replacement is the SAIJ50X100-20, retaining the same ISO 15552 interface, 50mm bore, 100mm stroke, 20mm adjust window, and G1/4 port.
The external stop screw allows trimming the extend stroke by up to 20mm on-site (usable 80-100mm). The stop sets position but is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ50X100-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ50X100-20 replacement — usually within 7-8 hours.