This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAIJ125X150-20TC, 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 SIJ125X150-20TC
The AirTAC SIJ125 Double Rod Adjustable Cylinder SIJ125X150-20TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 150mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAIJ125X150-20TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAIJ125X150-20TC
- 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 SIJ125X150-20TC
The AirTAC SIJ125X150-20TC is a double-acting double-rod adjustable-stroke ISO 15552 cylinder, now discontinued. The direct replacement is the SAIJ125X150-20TC, matching the 125mm bore, 150mm stroke, G1/2 port, and TC mounting interface. An external stop screw lets you trim the extend stroke by up to 20mm on-site, yielding a usable 130-150mm extension. This stop sets the end position but is not a load lock.
The SAIJ upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This non-magnetic SKU cannot take a sensor.
Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-20TC Technical Specifications
| Model | Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-20TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ125X150-20TC |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125X150-20TC 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 SAIJ125X150-20TC 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 SIJ125X150-20TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SIJ125X150-20TC Is Used
Press Fit Tuning
Allows operators to dial in the exact 130-150mm extend position for inserting bearings without machining hard stops.
Divertor Gate Adjustment
Fine-tunes the gate extension on a packaging line to accommodate varying product widths on the fly.
Pallet Stop Positioning
Provides an adjustable physical stop for pallets, letting maintenance shorten the stroke by 20mm if clearances change.
Replacing the Airtac SIJ125 Double Rod Adjustable Cylinder SIJ125X150-20TC with the SAIJ125X150-20TC
To replace the discontinued SIJ125X150-20TC, order the direct replacement SAIJ125X150-20TC to reuse the existing ISO 15552 TC mount and G1/2 porting. Choose the 20mm adjust window if you need precise 130-150mm extend tuning; for longer trims, select a larger adjust figure. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For stroke lengths of 300mm or more, verify side-load limits. Note that the external stop is not a lock; for held loads use SAIL, BSAI, or an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ125X150-20TC
- ✓ 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 SIJ125X150-20TC FAQ
Yes, the SIJ125X150-20TC is discontinued. The direct replacement is the SAIJ125X150-20TC, which shares the same ISO 15552 interface, 125mm bore, 150mm stroke, 20mm adjust window, G1/2 port, and TC mounting.
The external stop screw window is 20mm, allowing you to trim the extend stroke from 150mm down to 130mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
Request a Quote for the SAIJ125X150-20TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAIJ125X150-20TC replacement — usually within 7-8 hours.