This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X100-20STC, 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20STC
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 100mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X100-20STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X100-20STC
- 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20STC
The AirTAC SIJ125X100-20STC is a discontinued double-acting double-rod ISO 15552 adjustable-stroke cylinder. The external stop screw lets you trim the extend stroke by up to 20mm on-site, yielding a usable 80-100mm stroke. The direct replacement is the SAIJ125X100-20STC, matching the bore, force, port, and TC mount.
The SAIJ successor retains the ISO 15552 interface and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life. The stop screw sets the end position but is not a load lock; use SAIL or BSAI for held loads.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20STC Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X100-20STC |
| Bore size | Ø125 mm |
| Stroke | 100 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ125X100-20STC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAIJ125X100-20STC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | 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 SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20STC Is Used
Press Fit Tuning
Allows precise on-site stroke reduction up to 20mm to set exact pressing depths without machining hard stops.
Diverter Gate Adjustment
Fine-tunes the extend position of a diverting arm on a packaging line to accommodate varying product widths.
Pallet Stop Positioning
Provides adjustable end-stop locations for pallet handling, letting operators trim the 100mm stroke by 20mm as needed.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20STC with the SAIJ125X100-20STC
Replace the discontinued SIJ125X100-20STC directly with the SAIJ125X100-20STC, reusing your existing TC mount and G1/2 plumbing. This 125mm bore provides 8590N at 0.7MPa and 11045N at 0.9MPa. Choose the 20mm adjust window if your end-position needs field tuning between 80mm and 100mm. The -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches (the SAIJ uses current AirTAC switches). For strokes at or above 300mm, carefully manage side loading to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X100-20STC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X100-20STC FAQ
Yes, the SIJ125X100-20STC is discontinued. The direct replacement is the SAIJ125X100-20STC, which shares the same ISO 15552 interface, 125mm bore, 100mm stroke, 20mm adjust window, G1/2 port, and TC mounting.
The external stop screw allows you to trim the extend stroke by up to 20mm on-site (usable 80-100mm). It operates at 30-500mm/s with 40mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X100-20STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X100-20STC replacement — usually within 7-8 hours.