Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100
The AirTAC SAIJ125X150-100 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 150 mm stroke that can be mechanically dialed back by up to 100 mm, creating a highly flexible 50-150 mm usable travel window for precise end-position tuning. Equipped with a SUS420J2 stainless steel rod and PT tapered ports, it delivers 6136 N of pull force at 0.5 MPa to drive heavy actuators.
Because the adjuster acts purely as a mechanical stop at the retract end, it does not hold the load without live air pressure—always pair it with an external guide for long-stroke stability. The extruded aluminum barrel includes sensor grooves on both sides, and this non-magnet variant supports mounting options like Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / 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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100 Is Used
Product Size Changeovers
Dial in the exact 50-150 mm retract position instantly when switching a packaging line to a different carton size, eliminating the need to physically swap out cylinders.
Machine Setup Tuning
Use the rear stopper screw to micro-adjust the end-of-stroke position during commissioning, hitting precise mechanical stops without adding external shims.
Heavy Payload Handling
Leverage the 6136 N pull force to reliably shift heavy industrial jigs or fixtures, adjusting the travel window as different tooling profiles are introduced.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3681 N pull at 0.5 MPa) lacks the power to move your load, but stepping up to a 160 mm bore (9425 N pull) would be excessive overkill. The SAIJ125X150-100 is specifically selected over a fixed-stroke SAI cylinder when a machine requires frequent product changeovers, allowing operators to fine-tune the retract distance on the fly without swapping out the entire actuator or bolting on external stops. To match this ISO 15552 footprint, specify a 125 mm bore, 150 mm stroke, 100 mm adjustment, PT G1/2 port, and your required mounting set. Since the stroke is 150 mm, side-load is minimal, but an external guide remains recommended for optimal rod bearing life.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-100 FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of pull force and 8590 N of push force. It can deliver up to 11045 N push force at 0.7 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the 150 mm nominal stroke by up to 100 mm, providing a usable travel window of 50-150 mm. It only sets the end position and does not lock the load without live air pressure.
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