This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ100X55-20, 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X55-20
The AirTAC SIJ100 Double Rod Adjustable Cylinder SIJ100X55-20 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 55mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ100X55-20, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke55 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ100X55-20
- 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X55-20
The AirTAC SIJ100X55-20 is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. Its external stop screw lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 35-55 mm extension out of the 55 mm nominal maximum. The direct replacement is the SAIJ100X55-20, matching the bore, force, G1/2 port, and mounting interface.
The SAIJ upgrade utilizes an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this SKU lacks a -S magnet and cannot accept a sensor.
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X55-20 Technical Specifications
| Model | Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X55-20 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ100X55-20 |
| Bore size | Ø100 mm |
| Stroke | 55 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ100X55-20 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAIJ100X55-20 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X55-20
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×55 | 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 SIJ100 Double Rod Adjustable Cylinder SIJ100X55-20 Is Used
Press Fit Tuning
Light-duty press operations needing exact 35-55 mm extend endpoints dialed in on-site via the 20 mm stop screw window.
Diverter Gate Adjustment
Package routing gates where the extend position must be fine-tuned to accommodate varying product sizes without changing cylinders.
End-Stop Positioning
Pallet handling stops requiring precise physical end-position limits set by the external screw rather than fixed stroke length.
Replacing the Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X55-20 with the SAIJ100X55-20
To replace the discontinued SIJ100X55-20, order the SAIJ100X55-20. Choose the 20 mm adjust window if your end-position needs on-site tuning between 35 and 55 mm. Mounting options include FA, LB, and TC. Because this non-magnetic SKU lacks a -S suffix, it cannot support legacy CS1-B/DS1-B sensors. Since the 55 mm stroke is under 300 mm, side-load guide considerations are minimal. The stop screw sets end position but is not a load lock; for held loads use SAIL, BSAI, or an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ100X55-20
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ100 Double Rod Adjustable Cylinder SIJ100X55-20 FAQ
Yes, the SIJ100X55-20 is discontinued. The direct replacement is the SAIJ100X55-20, offering the same ISO 15552 interface, 100 mm bore, 55 mm stroke, 20 mm adjust window, and G1/2 port. The SAIJ family also adds an upgraded piston seal for longer life.
The external stop screw provides a 20 mm adjust window, shortening the 55 mm nominal extend stroke down to 35 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ100X55-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ100X55-20 replacement — usually within 7-8 hours.